import { dashboardSummary, menuRoutes, USER_STATUS, users } from './data'

export interface MockContext {
  url: string
  params: string[]
  query: Record<string, string>
  body: Record<string, any>
}

export interface MockRule {
  method: 'GET' | 'POST' | 'PUT' | 'DELETE'
  pattern: RegExp
  handler: (ctx: MockContext) => unknown
}

const toNumber = (value: unknown, fallback = 0) => {
  const n = Number(value)
  return Number.isFinite(n) ? n : fallback
}

export const mockRules: MockRule[] = [
  {
    method: 'POST',
    pattern: /^\/api\/v1\/auth\/login$/,
    handler: (ctx) => {
      const { username, password } = ctx.body
      if (!username || !password) {
        return { code: 'A0120', msg: '用户名和密码不能为空' }
      }
      return {
        accessToken: 'mock-access-token',
        refreshToken: 'mock-refresh-token',
        tokenType: 'Bearer',
        expiresIn: 7200,
      }
    },
  },
  {
    method: 'POST',
    pattern: /^\/api\/v1\/auth\/logout$/,
    handler: () => true,
  },
  {
    method: 'GET',
    pattern: /^\/api\/v1\/auth\/me$/,
    handler: () => ({
      userId: 1,
      username: 'admin',
      nickname: '超级管理员',
      avatar: '',
      roles: ['ADMIN'],
      permissions: ['sys:user:add', 'sys:user:edit', 'sys:user:delete', 'sys:user:query'],
    }),
  },
  {
    method: 'GET',
    pattern: /^\/api\/v1\/auth\/routes$/,
    handler: () => menuRoutes,
  },
  {
    method: 'GET',
    pattern: /^\/api\/v1\/users\/page$/,
    handler: (ctx) => {
      const { username, status, pageNum = '1', pageSize = '10' } = ctx.query
      const filtered = users.filter((item) => {
        const matchName = !username || item.username.includes(username)
        const matchStatus = !status || String(item.status) === status
        return matchName && matchStatus
      })
      const start = (toNumber(pageNum, 1) - 1) * toNumber(pageSize, 10)
      return {
        list: filtered.slice(start, start + toNumber(pageSize, 10)),
        total: filtered.length,
      }
    },
  },
  {
    method: 'GET',
    pattern: /^\/api\/v1\/users\/(\d+)$/,
    handler: (ctx) => users.find((item) => item.id === toNumber(ctx.params[0])) ?? null,
  },
  {
    method: 'POST',
    pattern: /^\/api\/v1\/users$/,
    handler: (ctx) => {
      const id = users.length + 1
      users.unshift({
        id,
        username: ctx.body.username ?? `user${id}`,
        nickname: ctx.body.nickname ?? '',
        mobile: ctx.body.mobile ?? '',
        email: ctx.body.email ?? '',
        status: ctx.body.status ?? USER_STATUS.ENABLED,
        deptName: ctx.body.deptName ?? '技术部',
        roleNames: ctx.body.roleNames ?? ['普通用户'],
        createTime: new Date().toISOString(),
      })
      return id
    },
  },
  {
    method: 'PUT',
    pattern: /^\/api\/v1\/users\/(\d+)$/,
    handler: (ctx) => {
      const target = users.find((item) => item.id === toNumber(ctx.params[0]))
      if (!target) return false
      Object.assign(target, ctx.body)
      return true
    },
  },
  {
    method: 'DELETE',
    pattern: /^\/api\/v1\/users\/([\d,]+)$/,
    handler: (ctx) => {
      const ids = ctx.params[0].split(',').map((id) => toNumber(id))
      ids.forEach((id) => {
        const index = users.findIndex((item) => item.id === id)
        if (index > -1) users.splice(index, 1)
      })
      return true
    },
  },
  {
    method: 'GET',
    pattern: /^\/api\/v1\/dashboard\/summary$/,
    handler: () => dashboardSummary,
  },
]