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

const appService = new AppService()

// 添加收藏
export async function POST(request: NextRequest, { params }: { params: { id: string } }) {
  try {
    const { id: appId } = await params
    const body = await request.json()
    const { userId } = body

    if (!userId) {
      return NextResponse.json(
        { success: false, error: '用戶ID不能為空' },
        { status: 400 }
      )
    }

    // 檢查應用是否存在
    const app = await appService.getAppById(appId)
    if (!app) {
      return NextResponse.json(
        { success: false, error: '應用不存在' },
        { status: 404 }
      )
    }

    // 添加收藏
    const result = await appService.addFavorite(userId, appId)
    
    if (result.success) {
      return NextResponse.json({
        success: true,
        message: '收藏成功'
      })
    } else {
      // 如果是重複收藏，返回 409 狀態碼
      const statusCode = result.error === '已經收藏過此應用' ? 409 : 400
      return NextResponse.json(
        { success: false, error: result.error },
        { status: statusCode }
      )
    }

  } catch (error) {
    console.error('添加收藏錯誤:', error)
    return NextResponse.json(
      { success: false, error: '添加收藏時發生錯誤' },
      { status: 500 }
    )
  }
}

// 移除收藏
export async function DELETE(request: NextRequest, { params }: { params: { id: string } }) {
  try {
    const { id: appId } = await params
    const { searchParams } = new URL(request.url)
    const userId = searchParams.get('userId')

    if (!userId) {
      return NextResponse.json(
        { success: false, error: '用戶ID不能為空' },
        { status: 400 }
      )
    }

    // 移除收藏
    const result = await appService.removeFavorite(userId, appId)
    
    if (result.success) {
      return NextResponse.json({
        success: true,
        message: '取消收藏成功'
      })
    } else {
      return NextResponse.json(
        { success: false, error: result.error },
        { status: 400 }
      )
    }

  } catch (error) {
    console.error('移除收藏錯誤:', error)
    return NextResponse.json(
      { success: false, error: '移除收藏時發生錯誤' },
      { status: 500 }
    )
  }
}

// 檢查收藏狀態
export async function GET(request: NextRequest, { params }: { params: { id: string } }) {
  try {
    const { id: appId } = await params
    const { searchParams } = new URL(request.url)
    const userId = searchParams.get('userId')

    if (!userId) {
      return NextResponse.json(
        { success: false, error: '用戶ID不能為空' },
        { status: 400 }
      )
    }

    // 檢查收藏狀態
    const isFavorited = await appService.isFavorited(userId, appId)
    
    return NextResponse.json({
      success: true,
      data: {
        isFavorited
      }
    })

  } catch (error) {
    console.error('檢查收藏狀態錯誤:', error)
    return NextResponse.json(
      { success: false, error: '檢查收藏狀態時發生錯誤' },
      { status: 500 }
    )
  }
}