import { defineStore } from 'pinia'
import { ref } from 'vue'
import { materialsApi } from '../api/materials'

export const useMaterialsStore = defineStore('materials', () => {
  const materials = ref([])
  // 有效物料选项，供入库、出库、物料申请等业务单据的表单使用。
  const materialOptions = ref([])
  // 含已作废物料的选项，只给库存流水这类历史记录的检索框用：查历史时需要能选中
  // 已经作废的物料，但业务单据的表单不该出现它们。
  const historicalMaterialOptions = ref([])
  const loading = ref(false)
  const pagination = ref({ currentPage: 1, pageSize: 20, total: 0, totalPages: 0 })

  const categoryMap = {
    'A01': '标准件', 'A02': '成品件', 'A03': '简易加工件', 'A04': '精密加工件',
    'A05': '钣金件', 'A06': '塑胶件', 'A07': '其他',
    'B01': '成品件', 'B02': '简易加工件', 'B03': 'PCB硬板', 'B04': 'FPC软板',
    'B05': '线束', 'B06': '组装组件', 'B07': '其他',
    'C01': '连接耗材', 'C02': '密封耗材', 'C03': '其他',
    'D01': '自研程序固件', 'D02': '外购软件授权', 'D03': '授权介质', 'D04': '其他',
    'E01': '成品', 'E02': '半成品',
    'F01': '资料文档', 'F02': '标识标牌', 'F03': '包装物料', 'F04': '随机工具配件', 'F05': '其他'
  }

  function getCategoryDisplay(category) {
    if (!category) return '-'
    const name = categoryMap[category] || ''
    return name ? `${category} - ${name}` : category
  }

  async function fetchMaterials(page = 1, search = '', status = 'all') {
    loading.value = true
    try {
      const pageSize = pagination.value.pageSize
      const offset = (page - 1) * pageSize
      const res = await materialsApi.getAll({ search, status, limit: pageSize, offset })
      materials.value = res.data?.items || res.data || []
      pagination.value.total = res.data?.total || materials.value.length
      pagination.value.currentPage = page
      pagination.value.totalPages = Math.ceil(pagination.value.total / pageSize) || 1
    } finally {
      loading.value = false
    }
  }

  // 接口单页上限是 100，循环翻页把符合条件的物料全部取回来。
  async function fetchOptionsByStatus(status) {
    const pageSize = 100
    let offset = 0
    let total = 0
    const options = []

    do {
      const res = await materialsApi.getAll({ status, limit: pageSize, offset })
      const items = res.data?.items || res.data || []
      options.push(...items)
      total = res.data?.total ?? options.length
      offset += items.length
    } while (offset < total)

    return options
  }

  async function fetchMaterialOptions() {
    materialOptions.value = await fetchOptionsByStatus('active')
  }

  async function fetchHistoricalMaterialOptions() {
    historicalMaterialOptions.value = await fetchOptionsByStatus('all')
  }

  async function refreshMaterialOptions() {
    await Promise.all([fetchMaterialOptions(), fetchHistoricalMaterialOptions()])
  }

  async function createMaterial(data) {
    const res = await materialsApi.create(data)
    await fetchMaterials(1)
    return res
  }

  async function updateMaterial(id, data) {
    const res = await materialsApi.update(id, data)
    await fetchMaterials(pagination.value.currentPage)
    return res
  }

  async function obsoleteMaterial(id) {
    const res = await materialsApi.obsolete(id)
    await fetchMaterials(pagination.value.currentPage)
    // 作废会改变物料在「有效」和「全部」两份选项里的归属，两份都要刷新
    await refreshMaterialOptions()
    return res
  }

  async function restoreMaterial(id) {
    const res = await materialsApi.restore(id)
    await fetchMaterials(pagination.value.currentPage)
    await refreshMaterialOptions()
    return res
  }

  return {
    materials, materialOptions, historicalMaterialOptions, loading, pagination, categoryMap,
    getCategoryDisplay, fetchMaterials, fetchMaterialOptions, fetchHistoricalMaterialOptions,
    createMaterial, updateMaterial, obsoleteMaterial, restoreMaterial
  }
})