import { NextRequest, NextResponse } from 'next/server'
import { prisma } from '@/lib/prisma'
import { verifyToken, hashPassword, verifyPassword } from '@/lib/auth'

export async function PUT(request: NextRequest) {
  try {
    const authHeader = request.headers.get('Authorization')
    const token = authHeader?.replace('Bearer ', '')

    if (!token) {
      return NextResponse.json({ message: '未提供认证令牌' }, { status: 401 })
    }

    const decoded = verifyToken(token)
    if (!decoded) {
      return NextResponse.json({ message: '无效的认证令牌' }, { status: 401 })
    }

    const { currentPassword, newPassword } = await request.json()

    if (!currentPassword || !newPassword) {
      return NextResponse.json({ message: '请提供当前密码和新密码' }, { status: 400 })
    }

    if (newPassword.length < 6) {
      return NextResponse.json({ message: '新密码长度至少6位' }, { status: 400 })
    }

    // 获取用户当前信息
    const user = await prisma.user.findUnique({
      where: { id: decoded.userId }
    })

    if (!user) {
      return NextResponse.json({ message: '用户不存在' }, { status: 404 })
    }

    // 验证当前密码
    const isCurrentPasswordValid = await verifyPassword(currentPassword, user.password)
    if (!isCurrentPasswordValid) {
      return NextResponse.json({ message: '当前密码错误' }, { status: 400 })
    }

    // 哈希新密码
    const hashedNewPassword = await hashPassword(newPassword)

    // 更新密码
    await prisma.user.update({
      where: { id: decoded.userId },
      data: {
        password: hashedNewPassword
      }
    })

    return NextResponse.json({ message: '密码修改成功' })

  } catch (error) {
    console.error('修改密码失败:', error)
    return NextResponse.json({ message: '修改密码失败' }, { status: 500 })
  }
}