import { NextRequest, NextResponse } from 'next/server'
import { UserService } from '@/lib/services/database-service'

const userService = new UserService()

export async function GET(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    const user = await userService.findById(params.id)
    
    if (!user) {
      return NextResponse.json(
        { error: '用戶不存在' },
        { status: 404 }
      )
    }

    // 獲取用戶統計
    const stats = await userService.getUserStatistics(params.id)

    return NextResponse.json({
      success: true,
      data: {
        user,
        stats
      }
    })

  } catch (error) {
    console.error('獲取用戶詳情錯誤:', error)
    return NextResponse.json(
      { error: '獲取用戶詳情時發生錯誤' },
      { status: 500 }
    )
  }
}

export async function PUT(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    const updates = await request.json()
    
    // 移除不允許更新的欄位
    delete updates.id
    delete updates.created_at
    delete updates.password_hash

    const updatedUser = await userService.update(params.id, updates)
    
    if (!updatedUser) {
      return NextResponse.json(
        { error: '用戶不存在或更新失敗' },
        { status: 404 }
      )
    }

    return NextResponse.json({
      success: true,
      message: '用戶資料已更新',
      data: updatedUser
    })

  } catch (error) {
    console.error('更新用戶錯誤:', error)
    return NextResponse.json(
      { error: '更新用戶時發生錯誤' },
      { status: 500 }
    )
  }
}

export async function DELETE(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    // 軟刪除：將 is_active 設為 false
    const result = await userService.update(params.id, { is_active: false })
    
    if (!result) {
      return NextResponse.json(
        { error: '用戶不存在或刪除失敗' },
        { status: 404 }
      )
    }

    return NextResponse.json({
      success: true,
      message: '用戶已刪除'
    })

  } catch (error) {
    console.error('刪除用戶錯誤:', error)
    return NextResponse.json(
      { error: '刪除用戶時發生錯誤' },
      { status: 500 }
    )
  }
}