import "dotenv/config";
import puppeteer from "puppeteer";
import axios from "axios";
import mysql from "mysql2/promise";
import { DateTime } from "luxon";
import path from "node:path";
import fs from "node:fs";

const LOG_FILE = path.join(process.cwd(), "newitems.log");
const MAX_LOG_SIZE = 20 * 1024 * 1024; // 20MB

// --- HELPERS ---
const wait = (ms) => new Promise((resolve) => setTimeout(resolve, ms));

async function safeGetContent(page) {
	try {
		return await page.content();
	} catch (err) {
		if (err.message.includes("Execution context was destroyed")) {
			await page.waitForNetworkIdle({ idleTime: 1000 }).catch(() => {});
			return await page.content();
		}
		throw err;
	}
}

function parseAndConvertToSydney(dateString, fromTimezone, formatDate) {
	const currentYear = new Date().getFullYear();
	let format = /^\d/.test(dateString[0]) ? "d-MMM HH:mm" : "MMM-d HH:mm";
	const fullDateString = `${dateString} ${currentYear}`;
	const dt = DateTime.fromFormat(fullDateString, `${format} yyyy`, { zone: fromTimezone });

	if (!dt.isValid) return null;
	const systemTz = Intl.DateTimeFormat().resolvedOptions().timeZone;
	return dt.setZone(systemTz).toFormat(formatDate);
}

// --- LOGIC LẤY CONFIG TỪ DB ---
async function getConfigs(pool) {
	let configs = [];
	const [keywords] = await pool.execute("SELECT id, name FROM hot_item_keyword WHERE level = 1");
	const [keywordsCustom] = await pool.execute("SELECT id, name, url FROM newitems_config");
	const [markets] = await pool.execute("SELECT id, url, market_code, shipping_postcode, timezone, country_name FROM ebay_site WHERE flag = 1");

	const keyWord = keywords?.map((el) => el.name)?.join("+");

	markets.forEach((m) => {
		const postCode = m.shipping_postcode ? `&_stpos=${m.shipping_postcode}` : "";
		// URL FixedPrice
		configs.push({
			data: `${m.url}/sch/i.html?_from=R40&_nkw=${keyWord}&_sacat=0&_sop=10${postCode}`,
			type_custom: "cisco",
			config_id: null,
			from_site: m.market_code,
			timezone: m.timezone,
			listingType: "FixedPrice",
		});
		// URL Auction
		configs.push({
			data: `${m.url}/sch/i.html?_from=R40&_nkw=${keyWord}&_sacat=0&_sop=1${postCode}`,
			type_custom: "cisco",
			config_id: null,
			from_site: m.market_code,
			timezone: m.timezone,
			listingType: "Auction",
		});
	});

	if (keywordsCustom.length > 0) {
		keywordsCustom.forEach((k) => {
			const matchedMarket = findMarketDataFromSearchUrl(k.url, markets);
			if (matchedMarket) {
				configs.push({
					data: k.url,
					type_custom: "custom",
					config_id: k.id,
					from_site: matchedMarket.market_code,
					timezone: matchedMarket.timezone,
					listingType: k.url?.includes("_sop=10") ? "FixedPrice" : "Auction",
				});
			}
		});
	}
	return configs;
}

function findMarketDataFromSearchUrl(searchUrl, marketDatas) {
	if (!searchUrl?.trim()) return null;
	try {
		const searchHost = new URL(searchUrl.trim()).host;
		for (const data of marketDatas) {
			if (searchUrl.includes(data.url)) return data;
			const marketHost = new URL(data.url).host;
			if (searchHost === marketHost) return data;
		}
	} catch (e) {
		return null;
	}
	return null;
}

// --- CORE SCRAPER ---
async function scrapeWithPuppeteer(browser, store) {
	let page = null;
	try {
		page = await browser.newPage();

		// Tối ưu RAM: Chặn các request không cần thiết
		await page.setRequestInterception(true);
		page.on("request", (req) => {
			if (["image", "stylesheet", "font", "media"].includes(req.resourceType())) req.abort();
			else req.continue();
		});

		await page.goto(store.data, { waitUntil: "networkidle2", timeout: 60000 });

		let retries = 0;
		while (retries < 10) {
			const html = await safeGetContent(page);
			if (html.includes("Checking your browser")) {
				await wait(2000);
				retries++;
				continue;
			}
			if (await page.$("li.s-card--horizontal")) break;
			await wait(2000);
			retries++;
		}

		const items = await page?.$$eval(
			"li.s-card--horizontal",
			(nodes, store) => {
				const results = [];

				const stringToTimestamp = (str) => {
					if (!str) return 0;

					const regex = /(\d+)\s*(d|day|h|hour|m|minute|s|second)s?/gi;
					let total = 0;
					let match;

					while ((match = regex.exec(str))) {
						const value = parseInt(match[1]);
						const unit = match[2].toLowerCase();

						if (unit === "d" || unit === "day") total += value * 86400;
						else if (unit === "h" || unit === "hour") total += value * 3600;
						else if (unit === "m" || unit === "minute") total += value * 60;
						else if (unit === "s" || unit === "second") total += value;
					}

					return total;
				};

				nodes.forEach((node) => {
					const payload = {};
					// ---------------- LINK + ID ----------------
					const linkEl = node.querySelector("div.su-image a");
					// if (!linkEl) return;
					const linkDetail = linkEl && linkEl?.href ? linkEl?.href : "";
					if (!linkDetail) return;
					payload.link_detail = linkDetail;
					const idMatch = linkDetail.match(/\/itm\/(\d+)/);
					if (!idMatch) return;

					payload.id = idMatch[1];

					// ---------------- NAME ----------------
					const titleEl = node.querySelector(".s-card__title");
					if (titleEl) {
						let name = titleEl.textContent.replace(/New\s*listing/i, "").trim();
						payload.title = name;
						payload.description = name;
					}

					// ---------------- CONDITION ----------------
					const condEl = node.querySelector(".s-card__subtitle");
					payload.condition_item = condEl?.textContent.trim() || "";

					// -------- IMAGE --------
					const pictureEl = node.querySelector("img.s-card__image");
					if (pictureEl) payload.picture = pictureEl.getAttribute("src") || "";

					// ---------------- PRICE + CURRENCY ----------------
					const priceEl = node.querySelector(".s-card__price");
					if (priceEl) {
						let text = priceEl.textContent.replace(",", "").trim();
						text = text.replace("£", "GBP ").replace("$", "");
						payload.priceText = text;
						const match = text.match(/([A-Za-z]{3})?\s?([\d.,]+)\s?([A-Za-z]{3})?/);
						if (match) {
							payload.currencyID = match[1] || match[3] || "";
							payload.price = match[2] || "";
							if (!payload.currencyID?.trim()) {
								const match1 = text.match(/([A-Za-z]{2,3})\s?([\d.]+)/);
								if (match1) {
									payload.currencyID = match1[1] || match1[3] || "";
								}
							}
							// if (!payload.currencyID?.trim()) payload.currencyID = "";
						}
					}

					// ---------------- AUCTION / BIDS ----------------
					const bidsEl = node.querySelector(".s-card__attribute-row .su-styled-text.large");
					if (bidsEl) {
						let txt = bidsEl.textContent.trim();

						if (/bids/i.test(txt)) {
							let bid = txt.match(/\d+/);
							if (bid) payload.bidCount = bid[0];
							payload.is_auctionList = 1;
						}

						if (/Buy It Now/i.test(txt)) payload.buyItNowAvailable = true;
						if (/Best Offer/i.test(txt)) payload.makeOffer = true;
					}

					// Keep only correct listing type
					const type = store.listingType || "FixedPrice";
					if (type === "Auction" && !payload.is_auctionList) return;
					if (type !== "Auction" && !payload.buyItNowAvailable && !payload.makeOffer) return;

					// ---------------- TIME LEFT (auction) ----------------
					const leftEl = node.querySelector(".s-card__time-left");
					if (leftEl) {
						const leftText = leftEl.textContent.trim();
						payload.timeLeft = leftText;
						payload.end_time = Math.floor(Date.now() / 1000 + stringToTimestamp(leftText));
					}

					// ---------------- SHIPPING & FROM SITE ----------------
					node.querySelectorAll(".s-card__attribute-row .su-styled-text.secondary.large").forEach((sp) => {
						const txt = sp.textContent;

						// shipping cost
						if (txt?.toLowerCase().includes("delivery")) {
							// payload.shipping = txt;
							const m = txt.match(/\d+\.\d+/);
							if (m) payload.shipping_cost = m[0];
							if (txt.toLowerCase().includes("free") || !payload.shipping_cost) payload.shipping_cost = 0;
						}

						// country
						if (txt?.toLowerCase().includes("from") || txt?.toLowerCase().includes("located in")) {
							payload.country = txt;
							const markets = [
								{ country_name: "Australia", market_code: "EBAY_AU" },
								{ country_name: "United Kingdom", market_code: "EBAY_GB" },
								{ country_name: "United States", market_code: "EBAY_US" },
								{ country_name: "Canada", market_code: "EBAY_ENCA" },
							];
							for (let site of markets) {
								if (txt.includes(site.country_name)) {
									payload.from_site = site.market_code;
									break;
								}
							}
						}
					});
					const from_site = store.from_site;
					if (!payload.country) payload.from_site = from_site;

					if ((payload.country && payload.from_site !== from_site) || (payload.country && !payload.from_site)) return;
					delete payload.country;

					// ---------------- SELLER / FEEDBACK ----------------
					node.querySelectorAll(".s-card__attribute-row .su-styled-text.primary.large").forEach((sp) => {
						const text = sp.textContent;
						// 96.9% positive (105)
						const m = text.match(/^([\d.]+%)\s*\w*\s*\(([^)]+)\)/);
						if (m) {
							payload.feedbackPercent = m[1];
							payload.feedbackScore = m[2];
						} else {
							payload.seller = text.trim();
						}
					});

					if (!payload.seller || !payload.price) return;

					// ---------------- START TIME / END TIME (Buy it now listing) ----------------
					const dateEl = node.querySelector(".s-card__attribute-row .su-styled-text.secondary.bold.large");
					if (dateEl) {
						const text = dateEl.textContent.trim();
						// NOTE: tùy bạn → tôi giữ logic y như PHP
						const ts = Date.parse(text);
						if (!isNaN(ts)) {
							payload.time = text;
							// const timeConvert = parseAndConvertToSydney(text, store.timezone, "yyyy/MM/dd HH:mm");
							// const timestamp = DateTime.fromFormat(timeConvert, format) // parse theo format
							// 	.toSeconds(); // timestamp giây

							// payload.start_time = Math.floor(timestamp);
							// payload.end_time = Math.floor(timestamp) + 2592000;
							// payload.start_time_string = timeConvert;
						}
					}
					const type_custom = store.type_custom || "custom";
					payload.current_time = Date.now();
					payload.type_custom = type_custom;
					payload.listingType = type;
					payload.config_id = store.config_id || null;

					results.push(payload);
				});

				return results;
			},
			store
		);

		return items.map((item) => {
			if (!item.time) return item;
			const timeConvert = parseAndConvertToSydney(item.time, store.timezone, "yyyy/MM/dd HH:mm");
			const ts = new Date(timeConvert).getTime() / 1000;
			return { ...item, timeConvert, start_time: ts, end_time: item.end_time || ts + 2592000, start_time_string: timeConvert };
		});
	} catch (err) {
		console.error(`Lỗi tại ${store.data}:`, err.message);
		return [];
	} finally {
		if (page) await page.close();
	}
}

function trimLogFileIfNeeded() {
	try {
		if (!fs.existsSync(LOG_FILE)) return;

		const stats = fs.statSync(LOG_FILE);
		if (stats.size > MAX_LOG_SIZE) {
			const data = fs.readFileSync(LOG_FILE, "utf8");
			const lines = data.split("\n");
			// Giữ lại 70% dòng mới nhất
			const keepLines = Math.floor(lines.length * 0.7);
			const trimmed = lines.slice(-keepLines).join("\n");

			fs.writeFileSync(LOG_FILE, trimmed + "\n", "utf8");
			console.log(`\n[SYSTEM] Log file trimmed (Size: ${(stats.size / 1024 / 1024).toFixed(2)}MB > 20MB)`);
		}
	} catch (err) {
		console.error("Error trimming log file:", err);
	}
}

// --- MAIN PROCESS ---
async function main() {
	const pool = mysql.createPool({
		host: process.env.MYSQL_HOST,
		user: process.env.MYSQL_USER,
		password: process.env.MYSQL_PASSWORD,
		database: process.env.MYSQL_DB_NAME,
		waitForConnections: true,
		connectionLimit: 5,
	});

	const browser = await puppeteer.launch({
		headless: true,
		args: ["--no-sandbox", "--disable-setuid-sandbox", "--disable-dev-shm-usage", "--single-process"],
	});

	console.log("🚀 Bắt đầu phiên làm việc mới...");

	let runCount = 0;
	const MAX_RUNS = 60; // Chạy 60 chu kỳ (~1 tiếng)
	const ONE_HOUR_MS = 60 * 60 * 1000;
	const SESSION_START = Date.now(); // Thời điểm bắt đầu chạy script
	const MAX_TIME_EXTENSIONS = SESSION_START + ONE_HOUR_MS; // Thời điểm phải kết thúc

	while (runCount < MAX_RUNS && Date.now() < MAX_TIME_EXTENSIONS) {
		runCount++;
		const startTime = Date.now();
		console.log(`--- Chu kỳ ${runCount}/${MAX_RUNS} --- ${MAX_TIME_EXTENSIONS - Date.now()} ---`);

		try {
			const configs = await getConfigs(pool);
			for (const store of configs) {
				if (Date.now() > MAX_TIME_EXTENSIONS) break;
				const items = await scrapeWithPuppeteer(browser, store);
				for (const item of items) {
					const [rows] = await pool.execute("SELECT id FROM items WHERE id = ?", [item.id]);
					if (rows.length > 0) continue;
					const title = (item.title || "").replace("Opens in a new window or tab", "").trim();
					console.log(`Processing ${store.data}`);
					console.log({ ...item, title });
					try {
						const res = await axios
							.post(
								`${process.env.API_DISTI_HOST}/api/items/insert`,
								{ ...item, title },
								{
									headers: { "x-key": "CanTho#1" },
								}
							)
							.then((res) => {
								console.log(res.data, item.id, item.timeConvert, item.time);
							})
							.catch((err) => {
								console.log(err);
							});
					} catch (e) {
						console.error(`❌ Lỗi API ID ${item.id}:`, e.message);
					}
				}
			}
		} catch (err) {
			console.error("Lỗi chu kỳ:", err.message);
		}

		const duration = Date.now() - startTime;
		const delay = Math.max(0, 60000 - duration);
		console.log(`Hoàn thành chu kỳ trong ${duration / 1000}s. Nghỉ ${delay / 1000}s.`);

		if (runCount < MAX_RUNS && Date.now() + delay < MAX_TIME_EXTENSIONS) await wait(delay);
	}

	console.log("🏁 Đã chạy đủ 60 lần. Đang làm mới tiến trình...");
	await browser.close();
	await pool.end();
	// Thực hiện dọn log một lần cuối trước khi thoát process hoàn toàn
	trimLogFileIfNeeded();
	process.exit(0);
}

main().catch((err) => {
	console.error("FATAL ERROR:", err);
	process.exit(1);
});