import env from '#start/env'
import logger from '@adonisjs/core/services/logger'
import type Product from '#models/product'
import type { SupplierPricePoint } from '#models/history'
import axios from 'axios'

interface ErpProductListParams {
  limit?: number
  skip?: number
  order?: string
  where?: {
    sku?: string
    warehouse?: string
    condition?: string
  }
}

export interface ErpProductItem {
  sku: string
  condition: string
  qty: number
  price: number
  costs?: Array<{ currency: string; price: number }> | null
  packageContain?: string | null
  type?: string | null
  erpId?: string | null
  warehouse?: string | null
}

export interface ErpProductPage {
  items: ErpProductItem[]
  /** Tổng số bản ghi ở ERP (dùng để phân trang vòng lặp sync) */
  total: number
  skip: number
  limit: number
}

/**
 * Gọi ERP để lấy lịch sử giá supplier theo SKU/condition.
 */
export default class ErpService {
  static async getSupplierPricing(product: Product): Promise<SupplierPricePoint[]> {
    const url = env.get('ERP_API_URL')
    if (!url) throw new Error('ERP_API_URL chưa cấu hình')

    const body = {
      urlAPI: '/api/wtbquote-result/get-result-list',
      filter: {
        limit: 50,
        skip: 0,
        order: 'updatedAt desc',
        where: { _q: product.sku, condition: product.condition },
      },
    }

    const resp = await axios.post(url + "/api/transferGetData", body, {
      headers: {
        Authorization: `Bearer ${env.get('ERP_API_KEY')}`,
        'Content-Type': 'application/json',
      },
    })
    if (!resp.data) throw new Error(`ERP API lỗi: ${resp.status}`)

    const data: any = await resp.data
    logger.debug({ count: data?.data?.length }, 'ERP supplier pricing fetched')

    return (data?.data ?? []).map((r: any) => ({
      price: Number(r.price),
      date: r.createdAt,
      source: 'erp',
    }))
  }

  /**
   * Gọi ERP để lấy danh sách sản phẩm tồn kho cho sync.
   */
  static async getProductsForSync(params: ErpProductListParams = {}): Promise<ErpProductPage> {
    const url = env.get('ERP_API_URL')
    if (!url) throw new Error('ERP_API_URL chưa cấu hình')
    const limit = params.limit ?? 20
    const skip = params.skip ?? 0
    try {
      const body = {
        urlAPI: '/api/products/instock',
        filter: {
          limit,
          skip,
          order: params.order ?? '',
          where: {
            sku: params.where?.sku ?? '',
            warehouse: params.where?.warehouse ?? '',
            condition: params.where?.condition ?? '',
          },
        },
      }

      const resp = await axios.post(url + "/api/transferGetData", body, {
        headers: {
          Authorization: `Bearer ${env.get('ERP_API_KEY')}`,
        },
      })
      if (!resp.data) throw new Error(`ERP API lỗi: ${resp.status}`)

      const data: any = await resp.data
      const raw = Array.isArray(data?.data) ? data.data : Array.isArray(data) ? data : []
      const total = Number(data?.total ?? raw.length)

      logger.debug({ count: raw.length, total, skip }, 'ERP products fetched for sync')

      const items: ErpProductItem[] = raw.map((item: any) => {
        const sku = String(item?.sku ?? item?.SKU ?? item?.productSku ?? item?.product?.sku ?? '').trim()
        const condition = String(
          item?.condition ?? item?.Condition ?? item?.conditionName ?? item?.productCondition ?? ''
        ).trim()
        const qty = Number(item?.qty ?? item?.quantity ?? item?.stock ?? item?.availableQty ?? item?.inStockQty ?? 0)
        const price = Number(item?.price ?? item?.salePrice ?? item?.listPrice ?? item?.unitPrice ?? 0)
        const costs = Array.isArray(item?.costs)
          ? item.costs.map((entry: any) => ({
            currency: String(entry?.currency ?? 'USD').trim(),
            price: Number(entry?.price ?? 0),
          }))
          : item?.cost != null || item?.purchasePrice != null || item?.costPrice != null
            ? [
              {
                currency: 'USD',
                price: Number(item?.cost ?? item?.purchasePrice ?? item?.costPrice ?? 0),
              },
            ]
            : null
        const packageContain = item?.packageContain ?? item?.package_contain ?? item?.packageQty ?? null
        const erpId = item?.productId ?? null
        const warehouse = item?.warehouse ?? 'AU'

        return {
          sku,
          condition,
          qty: Number.isFinite(qty) ? qty : 0,
          price: Number.isFinite(price) ? price : 0,
          costs,
          packageContain: packageContain == null ? null : String(packageContain),
          type: 'ERP',
          erpId: erpId ? String(erpId) : null,
          warehouse,
        }
      })

      return { items, total: Number.isFinite(total) ? total : items.length, skip, limit }
    }
    catch (error) {
      logger.error({ err: error }, 'ERP getProductsForSync lỗi')
      // throw error
      return { items: [], total: 0, skip, limit }
    }
  }
}