import { NextApiRequest, NextApiResponse } from 'next'
import { auth } from '../../../lib/supabase'
import { getUserProfile, handleApiError, validateEmail } from '../../../lib/api-utils'

interface LoginRequest {
  email: string
  password: string
}

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  if (req.method !== 'POST') {
    return res.status(405).json({ success: false, error: '方法不允许' })
  }

  try {
    const { email, password }: LoginRequest = req.body

    // 验证必填字段
    if (!email || !password) {
      return res.status(400).json({ 
        success: false,
        error: '缺少必填字段',
        details: '邮箱和密码为必填项'
      })
    }

    // 验证邮箱格式
    if (!validateEmail(email)) {
      return res.status(400).json({ 
        success: false, 
        error: '邮箱格式不正确' 
      })
    }

    // 登录用户
    const authData = await auth.signIn(email, password)

    if (!authData?.user || !authData?.session) {
      return res.status(401).json({ 
        success: false, 
        error: '登录失败，请检查邮箱和密码' 
      })
    }

    // 获取用户详细信息
    const userProfile = await getUserProfile(authData.user.id)

    // 更新最后登录时间
    if (userProfile) {
      try {
        await auth.updateUser({
          user_metadata: {
            ...authData.user.user_metadata,
            last_login: new Date().toISOString()
          }
        })
      } catch (updateError) {
        console.error('Update last login error:', updateError)
        // 不影响登录流程
      }
    }

    return res.status(200).json({
      success: true,
      message: '登录成功',
      data: {
        user: userProfile || {
          id: authData.user.id,
          email: authData.user.email,
          name: authData.user.user_metadata?.name || '',
          user_type: authData.user.user_metadata?.user_type || 'individual',
          enterprise_id: authData.user.user_metadata?.enterprise_id || null,
          status: 'active',
          phone: authData.user.user_metadata?.phone || null,
          created_at: authData.user.created_at,
          updated_at: authData.user.updated_at
        },
        session: {
          access_token: authData.session.access_token,
          refresh_token: authData.session.refresh_token,
          expires_at: authData.session.expires_at
        }
      }
    })

  } catch (error) {
    return handleApiError(res, error, 'Login')
  }
}