import { NextRequest, NextResponse } from 'next/server'
import { getServerSession } from 'next-auth'
import { authOptions } from '@/lib/auth'
import { prisma } from '@/lib/prisma'
import { exec } from 'child_process'
import { promisify } from 'util'

const execAsync = promisify(exec)

/**
 * 获取系统日志（仅管理员）
 * 用于调试和监控系统状态
 */
export async function GET(request: NextRequest) {
  try {
    // 验证管理员权限
    const session = await getServerSession(authOptions)
    if (!session || !(session.user as any).id) {
      return NextResponse.json({ error: '未登录' }, { status: 401 })
    }

    const user = await prisma?.user.findUnique({
      where: { id: (session.user as any).id },
      select: { role: true, isSuperAdmin: true }
    })

    if (!user?.isSuperAdmin && user?.role !== 'ADMIN') {
      return NextResponse.json({ error: '无权限访问' }, { status: 403 })
    }

    // 获取查询参数
    const searchParams = request.nextUrl.searchParams
    const lines = parseInt(searchParams.get('lines') || '100')
    const keyword = searchParams.get('keyword') || ''

    // 读取最近的日志
    let cmd = `docker logs --tail ${lines} youyidian-3d-material 2>&1`

    if (keyword) {
      cmd += ` | grep -i "${keyword}" || docker logs --tail ${lines} youyidian-3d-material 2>&1`
    }

    const { stdout, stderr } = await execAsync(cmd, {
      maxBuffer: 10 * 1024 * 1024, // 10MB
      timeout: 10000,
    })

    const logs = stdout || stderr

    return NextResponse.json({
      success: true,
      lines: logs.split('\n').length,
      logs: logs.substring(0, 50000), // 限制返回大小
      truncated: logs.length > 50000,
    })
  } catch (error) {
    console.error('[SystemLogs] Error:', error)
    return NextResponse.json(
      {
        error: error instanceof Error ? error.message : '获取日志失败',
        logs: '',
      },
      { status: 500 }
    )
  }
}