diff --git a/README.md b/README.md
index e69de29..1f77c2a 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,262 @@
+# Batch Management System
+
+A comprehensive system for managing batches with items and mixed items.
+
+## Features
+
+- ✅ Create batches with valid items (same MPN) and mixed items (different MPN)
+- 📊 View all batches with expandable item lists
+- 🔍 Search batches by name or ID
+- 🗑️ Delete batches (cascade deletes all items)
+- 📄 Pagination and sorting
+- 🎨 Modern, responsive UI
+
+## Database Structure
+
+### Tables
+
+**batches**
+- `id` - Auto-increment primary key
+- `batch_name` - Unique batch identifier
+- `createdAt` - Timestamp
+
+**items** (Valid items with same MPN)
+- `id` - Auto-increment primary key
+- `batch_id` - Foreign key to batches
+- `mpn` - Manufacturer Part Number
+- `sn` - Serial Number
+- `createdAt` - Timestamp
+
+**items_mix** (Mixed items with different MPN)
+- `id` - Auto-increment primary key
+- `batch_id` - Foreign key to batches
+- `mpn` - Manufacturer Part Number
+- `sn` - Serial Number
+- `createdAt` - Timestamp
+
+## Installation
+
+1. Install dependencies:
+```bash
+npm install
+```
+
+2. Start the server:
+```bash
+npm start
+```
+
+3. For development with auto-reload:
+```bash
+npm run dev
+```
+
+4. Open browser to:
+```
+http://localhost:4444
+```
+
+## API Documentation
+
+### 1. Save Batch
+
+**POST** `/api/batch/save`
+
+Create a new batch with items and optional mixed items.
+
+**Request Body:**
+```json
+{
+  "batch_name": "BATCH_20250210141530",
+  "items": [
+    {
+      "mpn": "CN_M378A5143DB0-CPB_1620",
+      "sn": "U03A00062074544398"
+    },
+    {
+      "mpn": "CN_M378A5143DB0-CPB_1620",
+      "sn": "U03A00062074544399"
+    }
+  ],
+  "items_mix": [
+    {
+      "mpn": "CN_M378A5143DB0-CPB_1621",
+      "sn": "U03A00062074544403"
+    }
+  ]
+}
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "batch_id": 1,
+  "batch_name": "BATCH_20250210141530",
+  "inserted_items": 2,
+  "inserted_mix_items": 1
+}
+```
+
+### 2. Get All Batches
+
+**GET** `/api/batch/get-all`
+
+Retrieve all batches with pagination, search, and sorting.
+
+**Query Parameters:**
+- `page` (default: 1) - Page number
+- `limit` (default: 50) - Items per page
+- `search` - Search by batch name or ID
+- `sortBy` (default: "id") - Column to sort by (id, batch_name, createdAt)
+- `sortOrder` (default: "DESC") - Sort order (ASC, DESC)
+
+**Example:**
+```
+GET /api/batch/get-all?page=1&limit=50&sortBy=createdAt&sortOrder=DESC
+```
+
+**Response:**
+```json
+{
+  "batches": [
+    {
+      "id": 1,
+      "batch_name": "BATCH_20250210141530",
+      "createdAt": "2025-02-10 14:15:30",
+      "items": [
+        {
+          "mpn": "CN_M378A5143DB0-CPB_1620",
+          "sn": "U03A00062074544398",
+          "createdAt": "2025-02-10 14:15:30"
+        }
+      ],
+      "items_mix": [
+        {
+          "mpn": "CN_M378A5143DB0-CPB_1621",
+          "sn": "U03A00062074544403",
+          "createdAt": "2025-02-10 14:15:30"
+        }
+      ]
+    }
+  ],
+  "total": 1,
+  "page": 1,
+  "limit": 50,
+  "totalPages": 1
+}
+```
+
+### 3. Get Single Batch
+
+**GET** `/api/batch/get/:id`
+
+Get a specific batch by ID with all its items.
+
+**Example:**
+```
+GET /api/batch/get/1
+```
+
+**Response:**
+```json
+{
+  "id": 1,
+  "batch_name": "BATCH_20250210141530",
+  "createdAt": "2025-02-10 14:15:30",
+  "items": [...],
+  "items_mix": [...]
+}
+```
+
+### 4. Delete Batch
+
+**DELETE** `/api/batch/delete/:id`
+
+Delete a batch and all its items (cascade delete).
+
+**Example:**
+```
+DELETE /api/batch/delete/1
+```
+
+**Response:**
+```json
+{
+  "success": true,
+  "deleted": 1
+}
+```
+
+### 5. Search Items
+
+**GET** `/api/items/search`
+
+Search for items across all batches.
+
+**Query Parameters:**
+- `q` (required) - Search query for MPN or SN
+
+**Example:**
+```
+GET /api/items/search?q=U03A00062074544398
+```
+
+**Response:**
+```json
+{
+  "results": [
+    {
+      "batch_id": 1,
+      "batch_name": "BATCH_20250210141530",
+      "mpn": "CN_M378A5143DB0-CPB_1620",
+      "sn": "U03A00062074544398",
+      "createdAt": "2025-02-10 14:15:30",
+      "type": "items"
+    }
+  ]
+}
+```
+
+## Frontend Features
+
+### Batch Table
+- Click on batch row to expand and view items
+- Items are displayed in two sections:
+  - ✅ Valid Items (same MPN)
+  - ⚠️ Mixed Items (different MPN)
+
+### Create Batch Modal
+- Auto-generates batch name with timestamp
+- JSON input for items and mixed items
+- Validation for required fields and JSON format
+
+### Search & Sort
+- Real-time search with debouncing
+- Sort by ID, Batch Name, or Created At
+- Toggle between ASC/DESC order
+
+## Technologies
+
+- **Backend:** Node.js, Express.js
+- **Database:** SQLite3
+- **Frontend:** Vanilla JavaScript, HTML5, CSS3
+- **Features:** RESTful API, Responsive Design
+
+## Project Structure
+
+```
+.
+├── server.js           # Express server with API routes
+├── index.html          # Frontend UI
+├── package.json        # Node.js dependencies
+├── products.db         # SQLite database (auto-generated)
+└── README.md          # This file
+```
+
+## Notes
+
+- Database is automatically created on first run
+- All timestamps are stored in UTC and converted to local time in UI
+- Cascade delete ensures all items are removed when batch is deleted
+- Foreign key constraints maintain data integrity
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 045c2d8..fb0e408 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,19 @@
 {
-  "name": "scanramproducts",
+  "name": "batch-management-system",
   "version": "1.0.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "name": "scanramproducts",
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-        "sqlite3": "^5.1.7"
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+      },
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@@ -59,12 +62,13 @@
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@@ -116,6 +120,20 @@
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+      "dev": true,
+      "license": "ISC",
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+        "picomatch": "^2.0.4"
+      },
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@@ -136,11 +154,17 @@
         "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
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+    "node_modules/array-flatten": {
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-      "optional": true
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@@ -161,6 +185,19 @@
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+      "dev": true,
+      "license": "MIT",
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+      "funding": {
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+      "funding": {
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+      "integrity": "sha512-is96t8F/1//UHAjNPHpbsNY46ELPpftGUoSVNXwUfMk/qdjSylYrWSu1XavVTBOn526kFiOR733ATgNBCQyH0g==",
+      "dev": true,
+      "requires": {
+        "chokidar": "^3.5.2",
+        "debug": "^4",
+        "ignore-by-default": "^1.0.1",
+        "minimatch": "^3.1.2",
+        "pstree.remy": "^1.1.8",
+        "semver": "^7.5.3",
+        "simple-update-notifier": "^2.0.0",
+        "supports-color": "^5.5.0",
+        "touch": "^3.1.0",
+        "undefsafe": "^2.0.5"
+      }
+    },
     "nopt": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-5.0.0.tgz",
@@ -2955,6 +3565,12 @@
         "abbrev": "1"
       }
     },
+    "normalize-path": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
+      "integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
+      "dev": true
+    },
     "npmlog": {
       "version": "6.0.2",
       "resolved": "https://registry.npmjs.org/npmlog/-/npmlog-6.0.2.tgz",
@@ -3009,9 +3625,15 @@
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-      "version": "8.3.0",
-      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.3.0.tgz",
-      "integrity": "sha512-7jdwVIRtsP8MYpdXSwOS0YdD0Du+qOoF/AEPIt88PcCFrZCzx41oxku1jD88hZBwbNUIEfpqvuhjFaMAqMTWnA=="
+      "version": "0.1.12",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.12.tgz",
+      "integrity": "sha512-RA1GjUVMnvYFxuqovrEqZoxxW5NUZqbwKtYz/Tt7nXerk0LbLblQmrsgdeOxV5SFHf0UDggjS/bSeOZwt1pmEQ=="
+    },
+    "picomatch": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-2.3.1.tgz",
+      "integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
+      "dev": true
     },
     "prebuild-install": {
       "version": "7.1.3",
@@ -3057,6 +3679,12 @@
         "ipaddr.js": "1.9.1"
       }
     },
+    "pstree.remy": {
+      "version": "1.1.8",
+      "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
+      "integrity": "sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==",
+      "dev": true
+    },
     "pump": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.3.tgz",
@@ -3080,13 +3708,13 @@
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     },
     "raw-body": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-3.0.2.tgz",
-      "integrity": "sha512-K5zQjDllxWkf7Z5xJdV0/B0WTNqx6vxG70zJE4N0kBs4LovmEYWJzQGxC9bS9RAKu3bgM40lrd5zoLJ12MQ5BA==",
+      "version": "2.5.3",
+      "resolved": "https://registry.npmjs.org/raw-body/-/raw-body-2.5.3.tgz",
+      "integrity": "sha512-s4VSOf6yN0rvbRZGxs8Om5CWj6seneMwK3oDb4lWDH0UPhWcxwOWw5+qk24bxq87szX1ydrwylIOp2uG1ojUpA==",
       "requires": {
         "bytes": "~3.1.2",
         "http-errors": "~2.0.1",
-        "iconv-lite": "~0.7.0",
+        "iconv-lite": "~0.4.24",
         "unpipe": "~1.0.0"
       }
     },
@@ -3111,6 +3739,15 @@
         "util-deprecate": "^1.0.1"
       }
     },
+    "readdirp": {
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
+      "dev": true,
+      "requires": {
+        "picomatch": "^2.2.1"
+      }
+    },
     "retry": {
       "version": "0.12.0",
       "resolved": "https://registry.npmjs.org/retry/-/retry-0.12.0.tgz",
@@ -3126,18 +3763,6 @@
         "glob": "^7.1.3"
       }
     },
-    "router": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/router/-/router-2.2.0.tgz",
-      "integrity": "sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ==",
-      "requires": {
-        "debug": "^4.4.0",
-        "depd": "^2.0.0",
-        "is-promise": "^4.0.0",
-        "parseurl": "^1.3.3",
-        "path-to-regexp": "^8.0.0"
-      }
-    },
     "safe-buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
@@ -3154,32 +3779,51 @@
       "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q=="
     },
     "send": {
-      "version": "1.2.1",
-      "resolved": "https://registry.npmjs.org/send/-/send-1.2.1.tgz",
-      "integrity": "sha512-1gnZf7DFcoIcajTjTwjwuDjzuz4PPcY2StKPlsGAQ1+YH20IRVrBaXSWmdjowTJ6u8Rc01PoYOGHXfP1mYcZNQ==",
+      "version": "0.19.2",
+      "resolved": "https://registry.npmjs.org/send/-/send-0.19.2.tgz",
+      "integrity": "sha512-VMbMxbDeehAxpOtWJXlcUS5E8iXh6QmN+BkRX1GARS3wRaXEEgzCcB10gTQazO42tpNIya8xIyNx8fll1OFPrg==",
       "requires": {
-        "debug": "^4.4.3",
-        "encodeurl": "^2.0.0",
-        "escape-html": "^1.0.3",
-        "etag": "^1.8.1",
-        "fresh": "^2.0.0",
-        "http-errors": "^2.0.1",
-        "mime-types": "^3.0.2",
-        "ms": "^2.1.3",
-        "on-finished": "^2.4.1",
-        "range-parser": "^1.2.1",
-        "statuses": "^2.0.2"
+        "debug": "2.6.9",
+        "depd": "2.0.0",
+        "destroy": "1.2.0",
+        "encodeurl": "~2.0.0",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
+        "fresh": "~0.5.2",
+        "http-errors": "~2.0.1",
+        "mime": "1.6.0",
+        "ms": "2.1.3",
+        "on-finished": "~2.4.1",
+        "range-parser": "~1.2.1",
+        "statuses": "~2.0.2"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "2.6.9",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+          "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+          "requires": {
+            "ms": "2.0.0"
+          },
+          "dependencies": {
+            "ms": {
+              "version": "2.0.0",
+              "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+              "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
+            }
+          }
+        }
       }
     },
     "serve-static": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-2.2.1.tgz",
-      "integrity": "sha512-xRXBn0pPqQTVQiC8wyQrKs2MOlX24zQ0POGaj0kultvoOCstBQM5yvOhAVSUwOMjQtTvsPWoNCHfPGwaaQJhTw==",
+      "version": "1.16.3",
+      "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.16.3.tgz",
+      "integrity": "sha512-x0RTqQel6g5SY7Lg6ZreMmsOzncHFU7nhnRWkKgWuMTu5NN0DR5oruckMqRvacAN9d5w6ARnRBXl9xhDCgfMeA==",
       "requires": {
-        "encodeurl": "^2.0.0",
-        "escape-html": "^1.0.3",
-        "parseurl": "^1.3.3",
-        "send": "^1.2.0"
+        "encodeurl": "~2.0.0",
+        "escape-html": "~1.0.3",
+        "parseurl": "~1.3.3",
+        "send": "~0.19.1"
       }
     },
     "set-blocking": {
@@ -3258,6 +3902,15 @@
         "simple-concat": "^1.0.0"
       }
     },
+    "simple-update-notifier": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz",
+      "integrity": "sha512-a2B9Y0KlNXl9u/vsW6sTIu9vGEpfKu2wRV6l1H3XEas/0gUIzGzBoP/IouTcUQbm9JWZLH3COxyn03TYlFax6w==",
+      "dev": true,
+      "requires": {
+        "semver": "^7.5.3"
+      }
+    },
     "smart-buffer": {
       "version": "4.2.0",
       "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
@@ -3344,6 +3997,15 @@
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
       "integrity": "sha512-4gB8na07fecVVkOI6Rs4e7T6NOTki5EmL7TUduTs6bu3EdnSycntVJ4re8kgZA+wx9IueI2Y11bfbgwtzuE0KQ=="
     },
+    "supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "requires": {
+        "has-flag": "^3.0.0"
+      }
+    },
     "tar": {
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/tar/-/tar-6.2.1.tgz",
@@ -3394,11 +4056,26 @@
         "readable-stream": "^3.1.1"
       }
     },
+    "to-regex-range": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
+      "dev": true,
+      "requires": {
+        "is-number": "^7.0.0"
+      }
+    },
     "toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
       "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA=="
     },
+    "touch": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.1.tgz",
+      "integrity": "sha512-r0eojU4bI8MnHr8c5bNo7lJDdI2qXlWWJk6a9EAFG7vbhTjElYhBVS3/miuE0uOuoLdb8Mc/rVfsmm6eo5o9GA==",
+      "dev": true
+    },
     "tunnel-agent": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
@@ -3408,15 +4085,20 @@
       }
     },
     "type-is": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/type-is/-/type-is-2.0.1.tgz",
-      "integrity": "sha512-OZs6gsjF4vMp32qrCbiVSkrFmXtG/AZhY3t0iAMrMBiAZyV9oALtXO8hsrHbMXF9x6L3grlFuwW2oAz7cav+Gw==",
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
       "requires": {
-        "content-type": "^1.0.5",
-        "media-typer": "^1.1.0",
-        "mime-types": "^3.0.0"
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
       }
     },
+    "undefsafe": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.5.tgz",
+      "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
+      "dev": true
+    },
     "unique-filename": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/unique-filename/-/unique-filename-1.1.1.tgz",
@@ -3445,6 +4127,11 @@
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw=="
     },
+    "utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA=="
+    },
     "vary": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
diff --git a/package.json b/package.json
index 50728b0..bd1b41c 100644
--- a/package.json
+++ b/package.json
@@ -1,16 +1,20 @@
 {
-  "name": "scanramproducts",
+  "name": "batch-management-system",
   "version": "1.0.0",
-  "description": "",
-  "main": "index.js",
+  "description": "Batch management system with items and mixed items",
+  "main": "server.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "start": "node server.js",
+    "dev": "nodemon server.js"
   },
-  "keywords": [],
+  "keywords": ["batch", "management", "sqlite", "express"],
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "express": "^5.2.1",
-    "sqlite3": "^5.1.7"
+    "express": "^4.18.2",
+    "sqlite3": "^5.1.6"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.1"
   }
-}
+}
\ No newline at end of file
diff --git a/products.db b/products.db
new file mode 100644
index 0000000..81cce0a
Binary files /dev/null and b/products.db differ
diff --git a/public/index.html b/public/index.html
index b673f68..5e851cb 100644
--- a/public/index.html
+++ b/public/index.html
@@ -3,7 +3,7 @@
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Product Management</title>
+  <title>Batch Management</title>
   <style>
     * {
       margin: 0;
@@ -19,7 +19,7 @@
     }
 
     .container {
-      max-width: 1400px;
+      max-width: 1600px;
       margin: 0 auto;
       background: white;
       border-radius: 16px;
@@ -94,6 +94,16 @@
       box-shadow: 0 4px 12px rgba(44, 62, 80, 0.4);
     }
 
+    .btn-success {
+      background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
+      color: white;
+    }
+
+    .btn-success:hover {
+      transform: translateY(-2px);
+      box-shadow: 0 4px 12px rgba(39, 174, 96, 0.4);
+    }
+
     .table-container {
       overflow-x: auto;
       padding: 0 30px 30px;
@@ -150,6 +160,100 @@
       background: #f8f9fa;
     }
 
+    .batch-row {
+      cursor: pointer;
+      font-weight: 500;
+    }
+
+    .batch-row:hover {
+      background: #e3f2fd !important;
+    }
+
+    .batch-row.expanded {
+      background: #e8f5e9 !important;
+    }
+
+    .items-row {
+      display: none;
+      background: #fafafa;
+    }
+
+    .items-row.show {
+      display: table-row;
+    }
+
+    .items-cell {
+      padding: 20px !important;
+      border-left: 4px solid #27ae60;
+    }
+
+    .items-container {
+      display: grid;
+      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
+      gap: 15px;
+    }
+
+    .items-section {
+      background: white;
+      border-radius: 8px;
+      padding: 15px;
+      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+    }
+
+    .items-section h4 {
+      color: #2c3e50;
+      margin-bottom: 10px;
+      font-size: 14px;
+      text-transform: uppercase;
+      letter-spacing: 0.5px;
+    }
+
+    .items-section.mix h4 {
+      color: #e74c3c;
+    }
+
+    .item-card {
+      background: #f8f9fa;
+      padding: 10px;
+      border-radius: 6px;
+      margin-bottom: 8px;
+      border-left: 3px solid #27ae60;
+      font-size: 13px;
+    }
+
+    .items-section.mix .item-card {
+      border-left-color: #e74c3c;
+    }
+
+    .item-card .label {
+      color: #6c757d;
+      font-weight: 500;
+      display: inline-block;
+      width: 40px;
+    }
+
+    .item-card .value {
+      color: #495057;
+    }
+
+    .badge {
+      display: inline-block;
+      padding: 4px 12px;
+      border-radius: 12px;
+      font-size: 12px;
+      font-weight: 500;
+    }
+
+    .badge-success {
+      background: #d4edda;
+      color: #155724;
+    }
+
+    .badge-warning {
+      background: #fff3cd;
+      color: #856404;
+    }
+
     .delete-btn {
       background: #dc3545;
       color: white;
@@ -166,6 +270,16 @@
       transform: scale(1.05);
     }
 
+    .expand-icon {
+      display: inline-block;
+      transition: transform 0.3s;
+      margin-right: 8px;
+    }
+
+    .expand-icon.expanded {
+      transform: rotate(90deg);
+    }
+
     .pagination {
       display: flex;
       justify-content: center;
@@ -223,7 +337,101 @@
       color: #6c757d;
     }
 
+    .modal {
+      display: none;
+      position: fixed;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      background: rgba(0,0,0,0.5);
+      z-index: 1000;
+      justify-content: center;
+      align-items: center;
+    }
+
+    .modal.active {
+      display: flex;
+    }
+
+    .modal-content {
+      background: white;
+      padding: 30px;
+      border-radius: 12px;
+      width: 90%;
+      max-width: 800px;
+      max-height: 80vh;
+      overflow-y: auto;
+    }
+
+    .modal h2 {
+      margin-bottom: 20px;
+      color: #495057;
+    }
+
+    .form-group {
+      margin-bottom: 15px;
+    }
+
+    .form-group label {
+      display: block;
+      margin-bottom: 5px;
+      color: #495057;
+      font-size: 14px;
+      font-weight: 500;
+    }
+
+    .form-group input, .form-group textarea {
+      width: 100%;
+      padding: 10px;
+      border: 2px solid #e9ecef;
+      border-radius: 6px;
+      font-size: 14px;
+      font-family: inherit;
+    }
+
+    .form-group textarea {
+      min-height: 150px;
+      resize: vertical;
+    }
+
+    .modal-buttons {
+      display: flex;
+      gap: 10px;
+      margin-top: 20px;
+    }
+
+    .btn-secondary {
+      background: #6c757d;
+      color: white;
+      flex: 1;
+    }
+
+    .btn-secondary:hover {
+      background: #5a6268;
+    }
+
+    .help-text {
+      font-size: 12px;
+      color: #6c757d;
+      margin-top: 5px;
+    }
+
+    .json-example {
+      background: #f8f9fa;
+      padding: 15px;
+      border-radius: 6px;
+      font-family: 'Courier New', monospace;
+      font-size: 12px;
+      overflow-x: auto;
+      margin-top: 10px;
+    }
+
     @media (max-width: 768px) {
+      .items-container {
+        grid-template-columns: 1fr;
+      }
+
       .controls {
         padding: 20px;
       }
@@ -252,163 +460,87 @@
         padding: 20px;
       }
     }
-
-    @media (max-width: 480px) {
-      body {
-        padding: 10px;
-      }
-
-      .container {
-        border-radius: 12px;
-      }
-
-      .header {
-        padding: 20px;
-      }
-
-      th, td {
-        padding: 8px 6px;
-        font-size: 11px;
-      }
-
-      .btn {
-        padding: 10px 16px;
-        font-size: 13px;
-      }
-    }
-
-    .modal {
-      display: none;
-      position: fixed;
-      top: 0;
-      left: 0;
-      width: 100%;
-      height: 100%;
-      background: rgba(0,0,0,0.5);
-      z-index: 1000;
-      justify-content: center;
-      align-items: center;
-    }
-
-    .modal.active {
-      display: flex;
-    }
-
-    .modal-content {
-      background: white;
-      padding: 30px;
-      border-radius: 12px;
-      width: 90%;
-      max-width: 500px;
-      max-height: 80vh;
-      overflow-y: auto;
-    }
-
-    .modal h2 {
-      margin-bottom: 20px;
-      color: #495057;
-    }
-
-    .form-group {
-      margin-bottom: 15px;
-    }
-
-    .form-group label {
-      display: block;
-      margin-bottom: 5px;
-      color: #495057;
-      font-size: 14px;
-      font-weight: 500;
-    }
-
-    .form-group input {
-      width: 100%;
-      padding: 10px;
-      border: 2px solid #e9ecef;
-      border-radius: 6px;
-      font-size: 14px;
-    }
-
-    .modal-buttons {
-      display: flex;
-      gap: 10px;
-      margin-top: 20px;
-    }
-
-    .btn-secondary {
-      background: #6c757d;
-      color: white;
-      flex: 1;
-    }
-
-    .btn-secondary:hover {
-      background: #5a6268;
-    }
   </style>
 </head>
 <body>
   <div class="container">
     <div class="header">
-      <h1>Product Management</h1>
-      <p>Manage your products efficiently</p>
+      <h1>📦 Batch Management System</h1>
+      <p>Manage batches with items and mixed items</p>
     </div>
 
     <div class="controls">
       <div class="search-box">
-        <input type="text" id="searchInput" placeholder="Search by ID, MPN, SN, or creator...">
+        <input type="text" id="searchInput" placeholder="Search by batch name or ID...">
       </div>
-      <button class="btn btn-primary" onclick="openCreateModal()">
-        Add Product
+      <button class="btn btn-success" onclick="openCreateModal()">
+        ➕ Create Batch
       </button>
     </div>
 
     <div class="table-container">
       <div id="loading" class="loading" style="display: none;">
-        Loading data...
+        Loading batches...
       </div>
 
       <div id="empty" class="empty" style="display: none;">
-        <h3>No products found</h3>
-        <p>Add your first product to get started!</p>
+        <h3>No batches found</h3>
+        <p>Create your first batch to get started!</p>
       </div>
 
-      <table id="productTable" style="display: none;">
+      <table id="batchTable" style="display: none;">
         <thead>
           <tr>
-            <th onclick="sortTable('id')">ID</th>
-            <th onclick="sortTable('mpn')">MPN</th>
-            <th onclick="sortTable('sn')">SN</th>
-            <th onclick="sortTable('createdAt')">Created At</th>
-            <th onclick="sortTable('createdBy')">Created By</th>
-            <th>Actions</th>
+            <th onclick="sortTable('id')" style="width: 80px;">ID</th>
+            <th onclick="sortTable('batch_name')">Batch Name</th>
+            <th style="width: 120px;">Items</th>
+            <th style="width: 120px;">Mixed Items</th>
+            <th onclick="sortTable('createdAt')" style="width: 180px;">Created At</th>
+            <th style="width: 100px;">Actions</th>
           </tr>
         </thead>
-        <tbody id="productBody"></tbody>
+        <tbody id="batchBody"></tbody>
       </table>
     </div>
 
     <div class="pagination" id="pagination"></div>
   </div>
 
-  <!-- Create Product Modal -->
+  <!-- Create Batch Modal -->
   <div id="createModal" class="modal">
     <div class="modal-content">
-      <h2>Add New Product</h2>
+      <h2>Create New Batch</h2>
+      
       <div class="form-group">
-        <label>MPN *</label>
-        <input type="text" id="mpnInput" placeholder="Enter MPN code">
+        <label>Batch Name *</label>
+        <input type="text" id="batchNameInput" placeholder="e.g., BATCH_20250210141530">
+        <div class="help-text">Format: BATCH_yyyymmddhhmmss or any unique name</div>
       </div>
+
       <div class="form-group">
-        <label>Serial Number (SN) *</label>
-        <input type="text" id="snInput" placeholder="Enter serial number">
+        <label>Items (Valid - Same MPN) *</label>
+        <textarea id="itemsInput" placeholder='Enter JSON array of items...'></textarea>
+        <div class="json-example">
+Example:
+[
+  {"mpn": "CN_M378A5143DB0-CPB_1620", "sn": "U03A00062074544398"},
+  {"mpn": "CN_M378A5143DB0-CPB_1620", "sn": "U03A00062074544399"}
+]</div>
       </div>
+
       <div class="form-group">
-        <label>Created By *</label>
-        <input type="text" id="createdByInput" placeholder="Enter creator name">
+        <label>Mixed Items (Different MPN) - Optional</label>
+        <textarea id="itemsMixInput" placeholder='Enter JSON array of mixed items...'></textarea>
+        <div class="json-example">
+Example:
+[
+  {"mpn": "CN_M378A5143DB0-CPB_1621", "sn": "U03A00062074544403"}
+]</div>
       </div>
+
       <div class="modal-buttons">
         <button class="btn btn-secondary" onclick="closeCreateModal()">Cancel</button>
-        <button class="btn btn-primary" onclick="createProduct()">Create</button>
+        <button class="btn btn-success" onclick="createBatch()">Create Batch</button>
       </div>
     </div>
   </div>
@@ -418,38 +550,43 @@
     let currentSort = 'id';
     let currentOrder = 'DESC';
     let searchTerm = '';
-    let URL = "https://logs1.danielvu.com/mobile-api/"
-    async function loadProducts() {
+    let URL = window.location.hostname === 'localhost' 
+      ? 'http://localhost:4444/api/' 
+      : 'https://logs1.danielvu.com/mobile-api/';
+
+    let expandedBatches = new Set();
+
+    async function loadBatches() {
       document.getElementById('loading').style.display = 'block';
-      document.getElementById('productTable').style.display = 'none';
+      document.getElementById('batchTable').style.display = 'none';
       document.getElementById('empty').style.display = 'none';
 
       try {
-        const response = await fetch(`${URL}product/get?page=${currentPage}&sortBy=${currentSort}&sortOrder=${currentOrder}&search=${encodeURIComponent(searchTerm)}`);
+        const response = await fetch(`${URL}batch/get-all?page=${currentPage}&sortBy=${currentSort}&sortOrder=${currentOrder}&search=${encodeURIComponent(searchTerm)}`);
         const data = await response.json();
 
         document.getElementById('loading').style.display = 'none';
 
-        if (data.products.length === 0) {
+        if (data.batches.length === 0) {
           document.getElementById('empty').style.display = 'block';
         } else {
-          document.getElementById('productTable').style.display = 'table';
-          renderProducts(data.products);
+          document.getElementById('batchTable').style.display = 'table';
+          renderBatches(data.batches);
           renderPagination(data);
         }
 
         updateSortIndicators();
       } catch (error) {
-        console.error('Error loading products:', error);
+        console.error('Error loading batches:', error);
         document.getElementById('loading').style.display = 'none';
+        alert('Error loading batches. Please check if the server is running.');
       }
     }
 
-    function renderProducts(products) {
-      const tbody = document.getElementById('productBody');
-      tbody.innerHTML = products.map(product => {
-        // Convert UTC to client's local timezone
-        const date = new Date(product.createdAt+"Z");
+    function renderBatches(batches) {
+      const tbody = document.getElementById('batchBody');
+      tbody.innerHTML = batches.map(batch => {
+        const date = new Date(batch.createdAt + "Z");
         const formattedDate = date.toLocaleString('en-US', {
           year: 'numeric',
           month: '2-digit',
@@ -459,22 +596,60 @@
           second: '2-digit',
           hour12: false
         });
+
+        const isExpanded = expandedBatches.has(batch.id);
         
         return `
-        <tr>
-          <td>${product.id}</td>
-          <td>${product.mpn}</td>
-          <td>${product.sn}</td>
-          <td>${formattedDate}</td>
-          <td>${product.createdBy}</td>
+        <tr class="batch-row ${isExpanded ? 'expanded' : ''}" onclick="toggleBatch(${batch.id})">
           <td>
-            <button class="delete-btn" onclick="deleteProduct(${product.id})">Delete</button>
+            <span class="expand-icon ${isExpanded ? 'expanded' : ''}">▶</span>
+            ${batch.id}
+          </td>
+          <td><strong>${batch.batch_name}</strong></td>
+          <td><span class="badge badge-success">${batch.items.length}</span></td>
+          <td><span class="badge badge-warning">${batch.items_mix.length}</span></td>
+          <td>${formattedDate}</td>
+          <td>
+            <button class="delete-btn" onclick="event.stopPropagation(); deleteBatch(${batch.id})">Delete</button>
+          </td>
+        </tr>
+        <tr class="items-row ${isExpanded ? 'show' : ''}" id="items-${batch.id}">
+          <td colspan="6" class="items-cell">
+            <div class="items-container">
+              <div class="items-section">
+                <h4>✅ Valid Items (${batch.items.length})</h4>
+                ${batch.items.length > 0 ? batch.items.map(item => `
+                  <div class="item-card">
+                    <div><span class="label">MPN:</span> <span class="value">${item.mpn}</span></div>
+                    <div><span class="label">SN:</span> <span class="value">${item.sn}</span></div>
+                  </div>
+                `).join('') : '<p style="color: #999;">No items</p>'}
+              </div>
+              <div class="items-section mix">
+                <h4>⚠️ Mixed Items (${batch.items_mix.length})</h4>
+                ${batch.items_mix.length > 0 ? batch.items_mix.map(item => `
+                  <div class="item-card">
+                    <div><span class="label">MPN:</span> <span class="value">${item.mpn}</span></div>
+                    <div><span class="label">SN:</span> <span class="value">${item.sn}</span></div>
+                  </div>
+                `).join('') : '<p style="color: #999;">No mixed items</p>'}
+              </div>
+            </div>
           </td>
         </tr>
         `;
       }).join('');
     }
 
+    function toggleBatch(batchId) {
+      if (expandedBatches.has(batchId)) {
+        expandedBatches.delete(batchId);
+      } else {
+        expandedBatches.add(batchId);
+      }
+      loadBatches();
+    }
+
     function renderPagination(data) {
       const pagination = document.getElementById('pagination');
       let html = '';
@@ -489,14 +664,14 @@
       }
 
       html += `<button class="page-btn" ${currentPage === data.totalPages ? 'disabled' : ''} onclick="changePage(${currentPage + 1})">Next</button>`;
-      html += `<span class="page-info">Total: ${data.total} products</span>`;
+      html += `<span class="page-info">Total: ${data.total} batches</span>`;
 
       pagination.innerHTML = html;
     }
 
     function changePage(page) {
       currentPage = page;
-      loadProducts();
+      loadBatches();
     }
 
     function sortTable(column) {
@@ -507,7 +682,7 @@
         currentOrder = 'DESC';
       }
       currentPage = 1;
-      loadProducts();
+      loadBatches();
     }
 
     function updateSortIndicators() {
@@ -515,7 +690,7 @@
         th.classList.remove('sorted', 'asc');
       });
 
-      const columns = ['id', 'mpn', 'sn', 'createdAt', 'createdBy'];
+      const columns = ['id', 'batch_name', 'createdAt'];
       const index = columns.indexOf(currentSort);
       if (index !== -1) {
         const th = document.querySelectorAll('th')[index];
@@ -532,73 +707,117 @@
       searchTimeout = setTimeout(() => {
         searchTerm = e.target.value;
         currentPage = 1;
-        loadProducts();
+        expandedBatches.clear();
+        loadBatches();
       }, 300);
     });
 
-    async function deleteProduct(id) {
-      if (!confirm('Are you sure you want to delete this product?')) return;
+    async function deleteBatch(id) {
+      if (!confirm('Are you sure you want to delete this batch and all its items?')) return;
 
       try {
-        const response = await fetch(`${URL}product/delete/${id}`, {
+        const response = await fetch(`${URL}batch/delete/${id}`, {
           method: 'DELETE'
         });
 
         if (response.ok) {
-          loadProducts();
+          expandedBatches.delete(id);
+          loadBatches();
         } else {
-          alert('Error deleting product');
+          alert('Error deleting batch');
         }
       } catch (error) {
-        console.error('Error deleting product:', error);
-        alert('Error deleting product');
+        console.error('Error deleting batch:', error);
+        alert('Error deleting batch');
       }
     }
 
     function openCreateModal() {
       document.getElementById('createModal').classList.add('active');
+      // Auto-generate batch name with timestamp
+      const now = new Date();
+      const timestamp = now.getFullYear() + 
+        String(now.getMonth() + 1).padStart(2, '0') + 
+        String(now.getDate()).padStart(2, '0') + 
+        String(now.getHours()).padStart(2, '0') + 
+        String(now.getMinutes()).padStart(2, '0') + 
+        String(now.getSeconds()).padStart(2, '0');
+      document.getElementById('batchNameInput').value = `BATCH_${timestamp}`;
     }
 
     function closeCreateModal() {
       document.getElementById('createModal').classList.remove('active');
-      document.getElementById('mpnInput').value = '';
-      document.getElementById('snInput').value = '';
-      document.getElementById('createdByInput').value = '';
+      document.getElementById('batchNameInput').value = '';
+      document.getElementById('itemsInput').value = '';
+      document.getElementById('itemsMixInput').value = '';
     }
 
-    async function createProduct() {
-      const mpn = document.getElementById('mpnInput').value.trim();
-      const sn = document.getElementById('snInput').value.trim();
-      const createdBy = document.getElementById('createdByInput').value.trim();
+    async function createBatch() {
+      const batch_name = document.getElementById('batchNameInput').value.trim();
+      const itemsText = document.getElementById('itemsInput').value.trim();
+      const itemsMixText = document.getElementById('itemsMixInput').value.trim();
 
-      if (!mpn || !sn || !createdBy) {
-        alert('Please fill in all fields');
+      if (!batch_name) {
+        alert('Please enter a batch name');
+        return;
+      }
+
+      if (!itemsText) {
+        alert('Please enter at least one item');
+        return;
+      }
+
+      let items, items_mix;
+
+      try {
+        items = JSON.parse(itemsText);
+        if (!Array.isArray(items) || items.length === 0) {
+          alert('Items must be a non-empty array');
+          return;
+        }
+      } catch (e) {
+        alert('Invalid JSON format for items: ' + e.message);
         return;
       }
 
       try {
-        const response = await fetch(URL+'product/create', {
+        items_mix = itemsMixText ? JSON.parse(itemsMixText) : [];
+        if (!Array.isArray(items_mix)) {
+          alert('Mixed items must be an array');
+          return;
+        }
+      } catch (e) {
+        alert('Invalid JSON format for mixed items: ' + e.message);
+        return;
+      }
+
+      try {
+        const response = await fetch(URL + 'batch/save', {
           method: 'POST',
           headers: {
             'Content-Type': 'application/json'
           },
-          body: JSON.stringify([{ mpn, sn, createdBy }])
+          body: JSON.stringify({ batch_name, items, items_mix })
         });
 
+        const result = await response.json();
+
         if (response.ok) {
           closeCreateModal();
-          loadProducts();
+          expandedBatches.clear();
+          loadBatches();
+          alert(`Batch created successfully!\nItems: ${result.inserted_items}\nMixed Items: ${result.inserted_mix_items}`);
         } else {
-          alert('Error creating product');
+          alert('Error creating batch: ' + result.error);
         }
       } catch (error) {
-        console.error('Error creating product:', error);
-        alert('Error creating product');
+        console.error('Error creating batch:', error);
+        alert('Error creating batch: ' + error.message);
       }
     }
 
-    // Load products on page load
-    loadProducts();
+    // Load batches on page load
+    loadBatches();
   </script>
 </body>
 </html>
\ No newline at end of file
diff --git a/server.js b/server.js
index 6d8db1c..ef7955a 100644
--- a/server.js
+++ b/server.js
@@ -7,58 +7,139 @@ const app = express();
 app.use(express.json());
 app.use(express.static('public'));
 
+// CORS middleware
+app.use((req, res, next) => {
+  res.header('Access-Control-Allow-Origin', '*');
+  res.header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, OPTIONS');
+  res.header('Access-Control-Allow-Headers', 'Content-Type');
+  if (req.method === 'OPTIONS') {
+    return res.sendStatus(200);
+  }
+  next();
+});
+
 // Initialize SQLite database
 const db = new sqlite3.Database('./products.db', (err) => {
   if (err) console.error(err.message);
   console.log('Connected to products database.');
 });
 
-// Create products table
-db.run(`CREATE TABLE IF NOT EXISTS products (
-  id INTEGER PRIMARY KEY AUTOINCREMENT,
-  mpn TEXT NOT NULL,
-  sn TEXT NOT NULL,
-  createdAt DATETIME DEFAULT CURRENT_TIMESTAMP,
-  createdBy TEXT NOT NULL
-)`);
+// Create tables
+db.serialize(() => {
+  // Batches table
+  db.run(`CREATE TABLE IF NOT EXISTS batches (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    batch_name TEXT NOT NULL UNIQUE,
+    createdAt DATETIME DEFAULT CURRENT_TIMESTAMP
+  )`);
 
-// API Routes
+  // Items table (for valid items)
+  db.run(`CREATE TABLE IF NOT EXISTS items (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    batch_id INTEGER NOT NULL,
+    mpn TEXT NOT NULL,
+    sn TEXT NOT NULL,
+    createdAt DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (batch_id) REFERENCES batches(id) ON DELETE CASCADE
+  )`);
 
-// Create products (batch insert)
-app.post('/api/product/create', (req, res) => {
-  const products = req.body;
-  
-  if (!Array.isArray(products) || products.length === 0) {
-    return res.status(400).json({ error: 'Expected an array of products' });
+  // Items_mix table (for mixed MPN items)
+  db.run(`CREATE TABLE IF NOT EXISTS items_mix (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    batch_id INTEGER NOT NULL,
+    mpn TEXT NOT NULL,
+    sn TEXT NOT NULL,
+    createdAt DATETIME DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (batch_id) REFERENCES batches(id) ON DELETE CASCADE
+  )`);
+
+  // Create indexes for better performance
+  db.run(`CREATE INDEX IF NOT EXISTS idx_items_batch_id ON items(batch_id)`);
+  db.run(`CREATE INDEX IF NOT EXISTS idx_items_mix_batch_id ON items_mix(batch_id)`);
+  db.run(`CREATE INDEX IF NOT EXISTS idx_items_mpn ON items(mpn)`);
+  db.run(`CREATE INDEX IF NOT EXISTS idx_items_sn ON items(sn)`);
+});
+
+// ==================== BATCH API ROUTES ====================
+
+// Save batch with items and items_mix
+app.post('/api/batch/save', (req, res) => {
+  const { batch_name, items, items_mix } = req.body;
+
+  if (!batch_name) {
+    return res.status(400).json({ error: 'batch_name is required' });
   }
 
-  const stmt = db.prepare('INSERT INTO products (mpn, sn, createdBy) VALUES (?, ?, ?)');
-  let inserted = 0;
-  let errors = [];
+  if (!Array.isArray(items) || items.length === 0) {
+    return res.status(400).json({ error: 'items array is required and must not be empty' });
+  }
 
-  products.forEach((product, index) => {
-    if (!product.mpn || !product.sn || !product.createdBy) {
-      errors.push(`Product at index ${index} is missing required fields`);
-      return;
-    }
+  db.serialize(() => {
+    db.run('BEGIN TRANSACTION');
 
-    stmt.run(product.mpn, product.sn, product.createdBy, (err) => {
-      if (err) errors.push(`Error inserting product at index ${index}: ${err.message}`);
-      else inserted++;
-    });
-  });
+    // Insert batch
+    db.run('INSERT INTO batches (batch_name) VALUES (?)', [batch_name], function(err) {
+      if (err) {
+        db.run('ROLLBACK');
+        return res.status(500).json({ error: 'Batch name already exists or database error: ' + err.message });
+      }
 
-  stmt.finalize(() => {
-    res.json({ 
-      success: true, 
-      inserted,
-      errors: errors.length > 0 ? errors : undefined
+      const batchId = this.lastID;
+      let insertedItems = 0;
+      let insertedMixItems = 0;
+      let errors = [];
+
+      // Insert items
+      const itemStmt = db.prepare('INSERT INTO items (batch_id, mpn, sn) VALUES (?, ?, ?)');
+      items.forEach((item, index) => {
+        if (!item.mpn || !item.sn) {
+          errors.push(`Item at index ${index} is missing mpn or sn`);
+          return;
+        }
+        itemStmt.run(batchId, item.mpn, item.sn, (err) => {
+          if (err) errors.push(`Error inserting item at index ${index}: ${err.message}`);
+          else insertedItems++;
+        });
+      });
+      itemStmt.finalize();
+
+      // Insert items_mix if provided
+      if (Array.isArray(items_mix) && items_mix.length > 0) {
+        const mixStmt = db.prepare('INSERT INTO items_mix (batch_id, mpn, sn) VALUES (?, ?, ?)');
+        items_mix.forEach((item, index) => {
+          if (!item.mpn || !item.sn) {
+            errors.push(`Mixed item at index ${index} is missing mpn or sn`);
+            return;
+          }
+          mixStmt.run(batchId, item.mpn, item.sn, (err) => {
+            if (err) errors.push(`Error inserting mixed item at index ${index}: ${err.message}`);
+            else insertedMixItems++;
+          });
+        });
+        mixStmt.finalize();
+      }
+
+      db.run('COMMIT', (err) => {
+        if (err) {
+          db.run('ROLLBACK');
+          return res.status(500).json({ error: 'Transaction failed: ' + err.message });
+        }
+
+        res.json({
+          success: true,
+          batch_id: batchId,
+          batch_name,
+          inserted_items: insertedItems,
+          inserted_mix_items: insertedMixItems,
+          errors: errors.length > 0 ? errors : undefined
+        });
+      });
     });
   });
 });
 
-// Get products with pagination, search, and sort
-app.get('/api/product/get', (req, res) => {
+// Get all batches with their items and items_mix
+app.get('/api/batch/get-all', (req, res) => {
   const page = parseInt(req.query.page) || 1;
   const limit = parseInt(req.query.limit) || 50;
   const search = req.query.search || '';
@@ -66,64 +147,190 @@ app.get('/api/product/get', (req, res) => {
   const sortOrder = req.query.sortOrder || 'DESC';
   const offset = (page - 1) * limit;
 
-  // Validate sortBy to prevent SQL injection
-  const validColumns = ['id', 'mpn', 'sn', 'createdAt', 'createdBy'];
+  // Validate sortBy
+  const validColumns = ['id', 'batch_name', 'createdAt'];
   const column = validColumns.includes(sortBy) ? sortBy : 'id';
   const order = sortOrder.toUpperCase() === 'ASC' ? 'ASC' : 'DESC';
 
-  let query = 'SELECT * FROM products';
-  let countQuery = 'SELECT COUNT(*) as total FROM products';
+  let query = 'SELECT * FROM batches';
+  let countQuery = 'SELECT COUNT(*) as total FROM batches';
   let params = [];
 
   if (search) {
-    const searchCondition = ` WHERE mpn LIKE ? OR sn LIKE ? OR createdBy LIKE ? OR id LIKE ?`;
+    const searchCondition = ` WHERE batch_name LIKE ? OR id LIKE ?`;
     query += searchCondition;
     countQuery += searchCondition;
     const searchParam = `%${search}%`;
-    params = [searchParam, searchParam, searchParam, searchParam];
+    params = [searchParam, searchParam];
   }
 
   query += ` ORDER BY ${column} ${order} LIMIT ? OFFSET ?`;
   params.push(limit, offset);
 
-  db.get(countQuery, search ? params.slice(0, 4) : [], (err, countRow) => {
+  db.get(countQuery, search ? params.slice(0, 2) : [], (err, countRow) => {
     if (err) {
       return res.status(500).json({ error: err.message });
     }
 
-    db.all(query, params, (err, rows) => {
+    db.all(query, params, (err, batches) => {
       if (err) {
         return res.status(500).json({ error: err.message });
       }
 
-      res.json({
-        products: rows,
-        total: countRow.total,
-        page,
-        limit,
-        totalPages: Math.ceil(countRow.total / limit)
+      if (batches.length === 0) {
+        return res.json({
+          batches: [],
+          total: 0,
+          page,
+          limit,
+          totalPages: 0
+        });
+      }
+
+      // Get items for each batch
+      let processed = 0;
+      const batchesWithItems = [];
+
+      batches.forEach(batch => {
+        // Get items
+        db.all('SELECT mpn, sn, createdAt FROM items WHERE batch_id = ?', [batch.id], (err, items) => {
+          if (err) {
+            console.error('Error fetching items:', err);
+            items = [];
+          }
+
+          // Get items_mix
+          db.all('SELECT mpn, sn, createdAt FROM items_mix WHERE batch_id = ?', [batch.id], (err, items_mix) => {
+            if (err) {
+              console.error('Error fetching items_mix:', err);
+              items_mix = [];
+            }
+
+            batchesWithItems.push({
+              id: batch.id,
+              batch_name: batch.batch_name,
+              createdAt: batch.createdAt,
+              items: items || [],
+              items_mix: items_mix || []
+            });
+
+            processed++;
+
+            if (processed === batches.length) {
+              res.json({
+                batches: batchesWithItems,
+                total: countRow.total,
+                page,
+                limit,
+                totalPages: Math.ceil(countRow.total / limit)
+              });
+            }
+          });
+        });
       });
     });
   });
 });
 
-// Delete product
-app.delete('/api/product/delete/:id', (req, res) => {
+// Get single batch by ID
+app.get('/api/batch/get/:id', (req, res) => {
   const id = req.params.id;
 
-  db.run('DELETE FROM products WHERE id = ?', id, function(err) {
+  db.get('SELECT * FROM batches WHERE id = ?', [id], (err, batch) => {
+    if (err) {
+      return res.status(500).json({ error: err.message });
+    }
+
+    if (!batch) {
+      return res.status(404).json({ error: 'Batch not found' });
+    }
+
+    // Get items
+    db.all('SELECT mpn, sn, createdAt FROM items WHERE batch_id = ?', [id], (err, items) => {
+      if (err) {
+        return res.status(500).json({ error: err.message });
+      }
+
+      // Get items_mix
+      db.all('SELECT mpn, sn, createdAt FROM items_mix WHERE batch_id = ?', [id], (err, items_mix) => {
+        if (err) {
+          return res.status(500).json({ error: err.message });
+        }
+
+        res.json({
+          id: batch.id,
+          batch_name: batch.batch_name,
+          createdAt: batch.createdAt,
+          items: items || [],
+          items_mix: items_mix || []
+        });
+      });
+    });
+  });
+});
+
+// Delete batch (cascade delete items and items_mix)
+app.delete('/api/batch/delete/:id', (req, res) => {
+  const id = req.params.id;
+
+  db.run('DELETE FROM batches WHERE id = ?', id, function(err) {
     if (err) {
       return res.status(500).json({ error: err.message });
     }
 
     if (this.changes === 0) {
-      return res.status(404).json({ error: 'Product not found' });
+      return res.status(404).json({ error: 'Batch not found' });
     }
 
     res.json({ success: true, deleted: this.changes });
   });
 });
 
+// Search items across all batches
+app.get('/api/items/search', (req, res) => {
+  const search = req.query.q || '';
+  
+  if (!search) {
+    return res.status(400).json({ error: 'Search query is required' });
+  }
+
+  const searchParam = `%${search}%`;
+
+  const query = `
+    SELECT 
+      b.id as batch_id,
+      b.batch_name,
+      i.mpn,
+      i.sn,
+      i.createdAt,
+      'items' as type
+    FROM items i
+    JOIN batches b ON i.batch_id = b.id
+    WHERE i.mpn LIKE ? OR i.sn LIKE ?
+    UNION ALL
+    SELECT 
+      b.id as batch_id,
+      b.batch_name,
+      im.mpn,
+      im.sn,
+      im.createdAt,
+      'items_mix' as type
+    FROM items_mix im
+    JOIN batches b ON im.batch_id = b.id
+    WHERE im.mpn LIKE ? OR im.sn LIKE ?
+    ORDER BY createdAt DESC
+    LIMIT 100
+  `;
+
+  db.all(query, [searchParam, searchParam, searchParam, searchParam], (err, results) => {
+    if (err) {
+      return res.status(500).json({ error: err.message });
+    }
+
+    res.json({ results });
+  });
+});
+
 // Serve HTML UI
 app.get('/', (req, res) => {
   res.sendFile(path.join(__dirname, 'public', 'index.html'));
diff --git a/test_api.js b/test_api.js
new file mode 100644
index 0000000..c4f2654
--- /dev/null
+++ b/test_api.js
@@ -0,0 +1,95 @@
+// Test script for Batch Management API
+// Run with: node test-api.js
+
+const BASE_URL = 'http://localhost:4444/api';
+
+async function testAPI() {
+  console.log('🚀 Testing Batch Management API\n');
+
+  // Test 1: Create Batch
+  console.log('1️⃣ Creating a new batch...');
+  try {
+    const now = new Date();
+    const timestamp = now.getFullYear() + 
+      String(now.getMonth() + 1).padStart(2, '0') + 
+      String(now.getDate()).padStart(2, '0') + 
+      String(now.getHours()).padStart(2, '0') + 
+      String(now.getMinutes()).padStart(2, '0') + 
+      String(now.getSeconds()).padStart(2, '0');
+
+    const createResponse = await fetch(`${BASE_URL}/batch/save`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        batch_name: `TEST_BATCH_${timestamp}`,
+        items: [
+          { mpn: 'CN_M378A5143DB0-CPB_1620', sn: 'U03A00062074544398' },
+          { mpn: 'CN_M378A5143DB0-CPB_1620', sn: 'U03A00062074544399' },
+          { mpn: 'CN_M378A5143DB0-CPB_1620', sn: 'U03A00062074544400' }
+        ],
+        items_mix: [
+          { mpn: 'CN_M378A5143DB0-CPB_1621', sn: 'U03A00062074544403' },
+          { mpn: 'CN_M378A5143DB0-CPB_1622', sn: 'U03A00062074544404' }
+        ]
+      })
+    });
+
+    const createData = await createResponse.json();
+    console.log('✅ Batch created:', createData);
+    console.log(`   - Batch ID: ${createData.batch_id}`);
+    console.log(`   - Items inserted: ${createData.inserted_items}`);
+    console.log(`   - Mixed items inserted: ${createData.inserted_mix_items}\n`);
+
+    const batchId = createData.batch_id;
+
+    // Test 2: Get All Batches
+    console.log('2️⃣ Getting all batches...');
+    const getAllResponse = await fetch(`${BASE_URL}/batch/get-all?page=1&limit=10`);
+    const getAllData = await getAllResponse.json();
+    console.log(`✅ Found ${getAllData.total} batches`);
+    console.log(`   - Page ${getAllData.page} of ${getAllData.totalPages}\n`);
+
+    // Test 3: Get Single Batch
+    console.log(`3️⃣ Getting batch #${batchId}...`);
+    const getSingleResponse = await fetch(`${BASE_URL}/batch/get/${batchId}`);
+    const getSingleData = await getSingleResponse.json();
+    console.log('✅ Batch details:');
+    console.log(`   - Batch Name: ${getSingleData.batch_name}`);
+    console.log(`   - Items: ${getSingleData.items.length}`);
+    console.log(`   - Mixed Items: ${getSingleData.items_mix.length}`);
+    console.log(`   - Created At: ${getSingleData.createdAt}\n`);
+
+    // Test 4: Search Items
+    console.log('4️⃣ Searching for items with SN containing "544398"...');
+    const searchResponse = await fetch(`${BASE_URL}/items/search?q=544398`);
+    const searchData = await searchResponse.json();
+    console.log(`✅ Found ${searchData.results.length} items`);
+    if (searchData.results.length > 0) {
+      console.log('   First result:', searchData.results[0]);
+    }
+    console.log();
+
+    // Test 5: Search Batches
+    console.log('5️⃣ Searching for batches with "TEST" in name...');
+    const searchBatchResponse = await fetch(`${BASE_URL}/batch/get-all?search=TEST`);
+    const searchBatchData = await searchBatchResponse.json();
+    console.log(`✅ Found ${searchBatchData.total} batches matching "TEST"\n`);
+
+    // Test 6: Delete Batch
+    console.log(`6️⃣ Deleting batch #${batchId}...`);
+    const deleteResponse = await fetch(`${BASE_URL}/batch/delete/${batchId}`, {
+      method: 'DELETE'
+    });
+    const deleteData = await deleteResponse.json();
+    console.log('✅ Batch deleted:', deleteData);
+    console.log(`   - Deleted count: ${deleteData.deleted}\n`);
+
+    console.log('🎉 All tests completed successfully!');
+
+  } catch (error) {
+    console.error('❌ Test failed:', error.message);
+  }
+}
+
+// Run tests
+testAPI();
\ No newline at end of file