import { mockCreditLimitList, mockSettlementList, mockWriteOffList } from '@/mock/finance'
import { WriteOffStatus } from '@/typings/mall'
import type { SettlementStatus, WriteOff } from '@/typings/mall'

/**
 * 金融相关 API
 */

// 获取信用额度
export function getCreditLimit() {
  return new Promise((resolve) => {
    setTimeout(() => {
      resolve({
        code: 0,
        data: mockCreditLimitList,
      })
    }, 300)
  })
}

// 获取应结账款列表
export function getSettlementList(params?: {
  status?: SettlementStatus
  merchantId?: string
}) {
  return new Promise((resolve) => {
    setTimeout(() => {
      let list = [...mockSettlementList]

      // 筛选
      if (params?.status) {
        // 如果查询未结，则包含逾期状态
        if (params.status === 'unsettled') {
          list = list.filter(item => item.status === 'unsettled' || item.status === 'overdue')
        } else {
          list = list.filter(item => item.status === params.status)
        }
      }
      if (params?.merchantId) {
        list = list.filter(item => item.merchantId === params.merchantId)
      }

      resolve({
        code: 0,
        data: list,
      })
    }, 300)
  })
}

// 获取到期订单
export function getDueOrders() {
  return new Promise((resolve) => {
    setTimeout(() => {
      const now = new Date()
      // 7天后
      const sevenDaysLater = new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000)

      // 筛选7天内到期的未结账款（包括已逾期）
      const list = mockSettlementList.filter((item) => {
        // 只关注未结和逾期状态
        if (item.status !== 'unsettled' && item.status !== 'overdue')
          return false
          
        const dueDate = new Date(item.dueDate)
        // 只要到期时间在7天内（包括过去的时间，即已逾期），都应该提醒
        return dueDate <= sevenDaysLater
      })

      resolve({
        code: 0,
        data: list,
      })
    }, 300)
  })
}

// 提交消账申请
export function submitWriteOff(data: {
  settlementId: string
  amount: number
  proof: string[]
  remark: string
}) {
  return new Promise((resolve) => {
    setTimeout(() => {
      const newWriteOff: WriteOff = {
        id: `writeoff_${Date.now()}`,
        settlementId: data.settlementId,
        amount: data.amount,
        proof: data.proof,
        remark: data.remark,
        submitTime: new Date().toISOString(),
        status: WriteOffStatus.PENDING,
      }

      // 模拟添加到列表
      mockWriteOffList.push(newWriteOff)

      resolve({
        code: 0,
        data: newWriteOff,
        message: '提交成功，等待审核',
      })
    }, 500)
  })
}

// 获取消账记录
export function getWriteOffList(settlementId?: string) {
  return new Promise((resolve) => {
    setTimeout(() => {
      let list = [...mockWriteOffList]

      if (settlementId) {
        list = list.filter(item => item.settlementId === settlementId)
      }

      resolve({
        code: 0,
        data: list,
      })
    }, 300)
  })
}