/**
 * 平台管理员路由
 * 管理所有企业租户、用户、数据总览
 * 所有接口需要 SUPER_ADMIN 权限
 */
import { Router } from 'express'
import prisma from '../lib/prisma'
import { AuthRequest, authMiddleware, platformAdminMiddleware } from '../middleware/auth'
import { parsePagination } from '../lib/pagination'
import { createOrgSchema, updateOrgSchema, updateOrgAdminSchema, createPlatformAdminSchema } from '../schemas/platform.schema'

const router = Router()

// 所有平台路由都需要认证 + SUPER_ADMIN 权限
router.use(authMiddleware, platformAdminMiddleware)

// ========== 数据总览 ==========

/**
 * 平台总览数据
 */
router.get('/dashboard', async (_req: AuthRequest, res, next) => {
  try {
    const now = new Date()
    const [orgs, users, employees, contracts, activeContracts, payslips] = await Promise.all([
      prisma.organization.count(),
      prisma.user.count({ where: { role: { not: 'SUPER_ADMIN' } } }),
      prisma.employee.count(),
      prisma.laborContract.count(),
      prisma.laborContract.count({
        where: {
          OR: [
            { endDate: null },
            { endDate: { gte: now } },
          ],
        },
      }),
      prisma.payslip.count(),
    ])

    // 按套餐分组
    const orgsByPlan = await prisma.organization.groupBy({
      by: ['plan'],
      _count: true,
    })

    // 最近 7 天注册的企业
    const recentOrgs = await prisma.organization.findMany({
      orderBy: { createdAt: 'desc' },
      take: 5,
      select: {
        id: true, name: true, plan: true, city: true,
        createdAt: true, maxEmployees: true,
        _count: { select: { employees: true, users: true } },
      },
    })

    res.json({
      success: true,
      data: {
        totalOrgs: orgs,
        totalUsers: users,
        totalEmployees: employees,
        totalContracts: contracts,
        activeContracts,
        totalPayslips: payslips,
        orgsByPlan: orgsByPlan.map((g: any) => ({ plan: g.plan, count: g._count })),
        recentOrgs: recentOrgs.map((o: any) => ({
          id: o.id,
          name: o.name,
          plan: o.plan,
          city: o.city,
          createdAt: o.createdAt,
          maxEmployees: o.maxEmployees,
          employeeCount: o._count.employees,
          userCount: o._count.users,
        })),
      },
    })
  } catch (err) {
    next(err)
  }
})

// ========== 企业租户管理 ==========

/**
 * 企业列表（分页 + 搜索）
 */
router.get('/orgs', async (req: AuthRequest, res, next) => {
  try {
    const { page, pageSize } = parsePagination(req.query)
    const search = (req.query.search as string) || ''
    const planFilter = (req.query.plan as string) || ''

    const where: any = {}
    if (search) {
      where.OR = [
        { name: { contains: search, mode: 'insensitive' } },
        { city: { contains: search, mode: 'insensitive' } },
        { contactName: { contains: search, mode: 'insensitive' } },
        { contactPhone: { contains: search } },
      ]
    }
    if (planFilter) {
      where.plan = planFilter
    }

    const [orgs, total] = await Promise.all([
      prisma.organization.findMany({
        where,
        orderBy: { createdAt: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
        select: {
          id: true, name: true, plan: true, maxEmployees: true,
          city: true, contactName: true, contactPhone: true,
          payrollDays: true, retirementReminderEnabled: true,
          createdAt: true, updatedAt: true,
          _count: {
            select: { employees: true, users: true, contracts: true, payslips: true },
          },
        },
      }),
      prisma.organization.count({ where }),
    ])

    res.json({
      success: true,
      data: {
        list: orgs.map((o: any) => ({
          ...o,
          employeeCount: o._count.employees,
          userCount: o._count.users,
          contractCount: o._count.contracts,
          payslipCount: o._count.payslips,
          _count: undefined,
        })),
        total,
        page,
        pageSize,
      },
    })
  } catch (err) {
    next(err)
  }
})

/**
 * 创建企业客户（含管理员账号）
 */
router.post('/orgs', async (req: AuthRequest, res, next) => {
  try {
    const {
      name, plan, maxEmployees, city, contactName, contactPhone,
      adminName, adminPhone, adminPassword,
    } = createOrgSchema.parse(req.body)

    const existing = await prisma.user.findUnique({ where: { phone: adminPhone } })
    if (existing) {
      return res.status(400).json({ success: false, error: { code: 'DUPLICATE', message: '该手机号已存在' } })
    }

    // 创建企业
    const org = await prisma.organization.create({
      data: {
        name,
        plan: (plan as any) || 'FREE',
        maxEmployees: maxEmployees || 20,
        city: city || null,
        contactName: contactName || null,
        contactPhone: contactPhone || null,
      },
    })

    // 创建管理员账号
    const bcrypt = await import('bcryptjs')
    const passwordHash = await bcrypt.default.hash(adminPassword, 10)
    const admin = await prisma.user.create({
      data: {
        orgId: org.id,
        phone: adminPhone,
        name: adminName || '管理员',
        passwordHash,
        role: 'ADMIN',
      },
      select: { id: true, name: true, phone: true, role: true },
    })

    res.json({
      success: true,
      data: {
        org: { id: org.id, name: org.name, plan: org.plan, maxEmployees: org.maxEmployees, city: org.city },
        admin,
      },
    })
  } catch (err) {
    next(err)
  }
})

/**
 * 企业详情
 */
router.get('/orgs/:id', async (req: AuthRequest, res, next) => {
  try {
    const org = await prisma.organization.findUnique({
      where: { id: req.params.id },
      include: {
        _count: {
          select: { employees: true, users: true, contracts: true, payslips: true },
        },
        users: {
          select: { id: true, name: true, phone: true, role: true, disabled: true, lastLoginAt: true, createdAt: true },
          orderBy: { createdAt: 'asc' },
        },
      },
    })

    if (!org) {
      return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '企业不存在' } })
    }

    res.json({ success: true, data: org })
  } catch (err) {
    next(err)
  }
})

/**
 * 更新企业信息（套餐、员工上限等）
 */
router.put('/orgs/:id', async (req: AuthRequest, res, next) => {
  try {
    const { name, plan, maxEmployees, city, contactName, contactPhone } = updateOrgSchema.parse(req.body)

    const updateData: any = {}
    if (name) updateData.name = name
    if (plan) updateData.plan = plan
    if (maxEmployees !== undefined) updateData.maxEmployees = maxEmployees
    if (city !== undefined) updateData.city = city
    if (contactName !== undefined) updateData.contactName = contactName
    if (contactPhone !== undefined) updateData.contactPhone = contactPhone

    const org = await prisma.organization.update({
      where: { id: req.params.id },
      data: updateData,
      select: { id: true, name: true, plan: true, maxEmployees: true, city: true, contactName: true, contactPhone: true },
    })

    res.json({ success: true, data: org })
  } catch (err) {
    next(err)
  }
})

/**
 * 编辑企业管理员（姓名、手机号、可选重置密码）
 */
router.put('/orgs/:id/admin', async (req: AuthRequest, res, next) => {
  try {
    const { adminName, adminPhone, adminPassword } = updateOrgAdminSchema.parse(req.body)

    // 找到该企业的 ADMIN 角色用户（第一个管理员）
    const admin = await prisma.user.findFirst({
      where: { orgId: req.params.id, role: 'ADMIN' },
      orderBy: { createdAt: 'asc' },
    })

    if (!admin) {
      return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '该企业未设置管理员' } })
    }

    // 如果修改了手机号，检查是否已被其他用户占用
    if (adminPhone && adminPhone !== admin.phone) {
      const existing = await prisma.user.findUnique({ where: { phone: adminPhone } })
      if (existing && existing.id !== admin.id) {
        return res.status(409).json({ success: false, error: { code: 'DUPLICATE_PHONE', message: '该手机号已被使用' } })
      }
    }

    const updateData: any = {}
    if (adminName) updateData.name = adminName
    if (adminPhone) updateData.phone = adminPhone
    if (adminPassword && adminPassword.length >= 8) {
      const bcrypt = require('bcryptjs')
      updateData.passwordHash = await bcrypt.hash(adminPassword, 10)
    }

    const updated = await prisma.user.update({
      where: { id: admin.id },
      data: updateData,
      select: { id: true, name: true, phone: true, role: true },
    })

    res.json({ success: true, data: updated })
  } catch (err) {
    next(err)
  }
})

/**
 * 删除企业（级联删除所有数据）
 */
router.delete('/orgs/:id', async (req: AuthRequest, res, next) => {
  try {
    await prisma.organization.delete({ where: { id: req.params.id } })
    res.json({ success: true, data: { message: '企业已删除' } })
  } catch (err) {
    next(err)
  }
})

// ========== 用户管理 ==========

/**
 * 所有企业用户列表（分页 + 搜索）
 */
router.get('/users', async (req: AuthRequest, res, next) => {
  try {
    const { page, pageSize } = parsePagination(req.query)
    const search = (req.query.search as string) || ''
    const orgId = (req.query.orgId as string) || ''

    const where: any = { role: { not: 'SUPER_ADMIN' } }
    if (search) {
      where.OR = [
        { name: { contains: search, mode: 'insensitive' } },
        { phone: { contains: search } },
      ]
    }
    if (orgId) {
      where.orgId = orgId
    }

    const [users, total] = await Promise.all([
      prisma.user.findMany({
        where,
        orderBy: { createdAt: 'desc' },
        skip: (page - 1) * pageSize,
        take: pageSize,
        select: {
          id: true, name: true, phone: true, role: true,
          disabled: true, lastLoginAt: true, createdAt: true,
          org: { select: { id: true, name: true } },
        },
      }),
      prisma.user.count({ where }),
    ])

    res.json({
      success: true,
      data: {
        list: users.map((u: any) => ({
          ...u,
          orgName: u.org?.name || null,
          org: undefined,
        })),
        total,
        page,
        pageSize,
      },
    })
  } catch (err) {
    next(err)
  }
})

/**
 * 启用/禁用用户
 */
router.put('/users/:id/toggle', async (req: AuthRequest, res, next) => {
  try {
    const user = await prisma.user.findUnique({ where: { id: req.params.id } })
    if (!user) {
      return res.status(404).json({ success: false, error: { code: 'NOT_FOUND', message: '用户不存在' } })
    }
    if (user.role === 'SUPER_ADMIN') {
      return res.status(400).json({ success: false, error: { code: 'FORBIDDEN', message: '不能操作平台管理员账号' } })
    }

    const updated = await prisma.user.update({
      where: { id: req.params.id },
      data: { disabled: !user.disabled },
      select: { id: true, name: true, phone: true, role: true, disabled: true },
    })

    res.json({ success: true, data: updated })
  } catch (err) {
    next(err)
  }
})

// ========== 平台管理员管理 ==========

/**
 * 平台管理员列表
 */
router.get('/admins', async (_req: AuthRequest, res, next) => {
  try {
    const admins = await prisma.user.findMany({
      where: { role: 'SUPER_ADMIN' },
      select: { id: true, name: true, phone: true, disabled: true, lastLoginAt: true, createdAt: true },
      orderBy: { createdAt: 'asc' },
    })
    res.json({ success: true, data: admins })
  } catch (err) {
    next(err)
  }
})

/**
 * 创建平台管理员
 */
router.post('/admins', async (req: AuthRequest, res, next) => {
  try {
    const { name, phone, password } = createPlatformAdminSchema.parse(req.body)

    const existing = await prisma.user.findUnique({ where: { phone } })
    if (existing) {
      return res.status(400).json({ success: false, error: { code: 'DUPLICATE', message: '该手机号已存在' } })
    }

    const bcrypt = await import('bcryptjs')
    const passwordHash = await bcrypt.default.hash(password, 10)
    const admin = await prisma.user.create({
      data: { name, phone, passwordHash, role: 'SUPER_ADMIN', orgId: null },
      select: { id: true, name: true, phone: true, role: true },
    })

    res.json({ success: true, data: admin })
  } catch (err) {
    next(err)
  }
})

export default router