/**
 * 商户端 API 接口
 */
import type { 
  MerchantOrder, 
  MerchantGoods, 
  MerchantStats, 
  FinanceOverview, 
  Transaction, 
  Settlement, 
  WithdrawRecord,
  ShopInfo,
  GoodsFormData,
} from '@/typings/merchant'
import { OrderStatus, GoodsStatus } from '@/typings/merchant'
import {
  mockMerchantStats,
  mockMerchantOrders,
  mockMerchantGoods,
  mockFinanceOverview,
  mockTransactions,
  mockSettlements,
  mockWithdrawRecords,
  mockShopInfo,
} from '../mock'

// ==================== 统计 API ====================

/** 获取商户统计数据 */
export function getMerchantStats(): Promise<MerchantStats> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(mockMerchantStats)
    }, 300)
  })
}

// ==================== 订单 API ====================

/** 订单查询参数 */
interface OrderQueryParams {
  status?: OrderStatus | 'all'
  keyword?: string
  page?: number
  pageSize?: number
}

/** 获取订单列表 */
export function getMerchantOrders(params: OrderQueryParams = {}): Promise<{ list: MerchantOrder[]; total: number }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      let list = [...mockMerchantOrders]
      
      // 状态筛选
      if (params.status && params.status !== 'all') {
        list = list.filter(item => item.status === params.status)
      }
      
      // 关键词搜索
      if (params.keyword) {
        const keyword = params.keyword.toLowerCase()
        list = list.filter(item => 
          item.orderNo.toLowerCase().includes(keyword) ||
          item.customerName.toLowerCase().includes(keyword)
        )
      }
      
      resolve({ list, total: list.length })
    }, 300)
  })
}

/** 获取订单详情 */
export function getMerchantOrderDetail(id: string): Promise<MerchantOrder | null> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const order = mockMerchantOrders.find(item => item.id === id)
      resolve(order || null)
    }, 300)
  })
}

/** 确认订单 */
export function confirmOrder(id: string): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const order = mockMerchantOrders.find(item => item.id === id)
      if (order) {
        order.status = OrderStatus.SHIPPING
      }
      resolve(true)
    }, 500)
  })
}

/** 发货 */
export function shipOrder(id: string, data: { company: string; trackingNo: string }): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const order = mockMerchantOrders.find(item => item.id === id)
      if (order) {
        order.status = OrderStatus.SHIPPED
        order.shipTime = new Date().toISOString()
        order.logistics = {
          company: data.company,
          trackingNo: data.trackingNo,
          status: '已发货',
          traces: [{ time: new Date().toISOString(), content: '商家已发货' }],
        }
      }
      resolve(true)
    }, 500)
  })
}

/** 添加商家备注 */
export function addMerchantRemark(id: string, remark: string): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const order = mockMerchantOrders.find(item => item.id === id)
      if (order) {
        order.merchantRemark = remark
      }
      resolve(true)
    }, 300)
  })
}

// ==================== 商品 API ====================

/** 商品查询参数 */
interface GoodsQueryParams {
  status?: GoodsStatus | 'all' | 'lowStock'
  keyword?: string
  page?: number
  pageSize?: number
}

/** 获取商品列表 */
export function getMerchantGoodsList(params: GoodsQueryParams = {}): Promise<{ list: MerchantGoods[]; total: number }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      let list = [...mockMerchantGoods]
      
      // 状态筛选
      if (params.status) {
        if (params.status === 'lowStock') {
          list = list.filter(item => item.stock <= 10)
        } else if (params.status !== 'all') {
          list = list.filter(item => item.status === params.status)
        }
      }
      
      // 关键词搜索
      if (params.keyword) {
        const keyword = params.keyword.toLowerCase()
        list = list.filter(item => item.name.toLowerCase().includes(keyword))
      }
      
      resolve({ list, total: list.length })
    }, 300)
  })
}

/** 获取商品详情 */
export function getMerchantGoodsDetail(id: string): Promise<MerchantGoods | null> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const goods = mockMerchantGoods.find(item => item.id === id)
      resolve(goods || null)
    }, 300)
  })
}

/** 保存商品 */
export function saveMerchantGoods(data: GoodsFormData): Promise<{ id: string }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const id = data.id || `goods_${Date.now()}`
      resolve({ id })
    }, 500)
  })
}

/** 更新商品状态 */
export function updateGoodsStatus(id: string, status: GoodsStatus): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      const goods = mockMerchantGoods.find(item => item.id === id)
      if (goods) {
        goods.status = status
      }
      resolve(true)
    }, 300)
  })
}

/** 删除商品 */
export function deleteMerchantGoods(id: string): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(true)
    }, 300)
  })
}

// ==================== 财务 API ====================

/** 获取财务概览 */
export function getFinanceOverview(): Promise<FinanceOverview> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(mockFinanceOverview)
    }, 300)
  })
}

/** 获取交易记录 */
export function getTransactions(page = 1, pageSize = 20): Promise<{ list: Transaction[]; total: number }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({ list: mockTransactions, total: mockTransactions.length })
    }, 300)
  })
}

/** 获取结算记录 */
export function getSettlements(page = 1, pageSize = 20): Promise<{ list: Settlement[]; total: number }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({ list: mockSettlements, total: mockSettlements.length })
    }, 300)
  })
}

/** 获取提现记录 */
export function getWithdrawRecords(page = 1, pageSize = 20): Promise<{ list: WithdrawRecord[]; total: number }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({ list: mockWithdrawRecords, total: mockWithdrawRecords.length })
    }, 300)
  })
}

/** 申请提现 */
export function applyWithdraw(data: { amount: number; bankAccount: string }): Promise<{ id: string }> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({ id: `withdraw_${Date.now()}` })
    }, 500)
  })
}

// ==================== 店铺 API ====================

/** 获取店铺信息 */
export function getShopInfo(): Promise<ShopInfo> {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve(mockShopInfo)
    }, 300)
  })
}

/** 更新店铺信息 */
export function updateShopInfo(data: Partial<ShopInfo>): Promise<boolean> {
  return new Promise((resolve) => {
    setTimeout(() => {
      Object.assign(mockShopInfo, data)
      resolve(true)
    }, 500)
  })
}