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

interface RouteContext {
  params: Promise<{ id: string }>
}

interface CommandRequest {
  type: string // SHELL, RESTART_SERVICE, UPDATE, ECHO, etc.
  payload?: Record<string, unknown>
}

// Common command types
const ALLOWED_COMMAND_TYPES = [
  'ECHO', // Test connectivity
  'SHELL', // Execute shell command
  'RESTART_SERVICE', // Restart a Docker service
  'UPDATE', // Update orchestrator/agent
  'DOCKER_COMPOSE_UP', // Start stack
  'DOCKER_COMPOSE_DOWN', // Stop stack
  'DOCKER_COMPOSE_RESTART', // Restart stack
  'GET_LOGS', // Get container logs
  'GET_STATUS', // Get system status
]

/**
 * GET /api/v1/admin/servers/[id]/command
 * Get command history for a server
 */
export async function GET(request: NextRequest, context: RouteContext) {
  try {
    // Authentication check
    const session = await auth()
    if (!session || session.user.userType !== 'staff') {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }

    const { id: orderId } = await context.params
    const searchParams = request.nextUrl.searchParams
    const limit = parseInt(searchParams.get('limit') || '50', 10)
    const offset = parseInt(searchParams.get('offset') || '0', 10)

    // Find server connection by order ID
    const serverConnection = await prisma.serverConnection.findUnique({
      where: { orderId },
    })

    if (!serverConnection) {
      return NextResponse.json(
        { error: 'Server connection not found' },
        { status: 404 }
      )
    }

    // Get command history
    const [commands, total] = await Promise.all([
      prisma.remoteCommand.findMany({
        where: { serverConnectionId: serverConnection.id },
        orderBy: { queuedAt: 'desc' },
        take: limit,
        skip: offset,
      }),
      prisma.remoteCommand.count({
        where: { serverConnectionId: serverConnection.id },
      }),
    ])

    return NextResponse.json({
      commands,
      pagination: {
        total,
        limit,
        offset,
        hasMore: offset + commands.length < total,
      },
    })
  } catch (error) {
    console.error('Get commands error:', error)
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    )
  }
}

/**
 * POST /api/v1/admin/servers/[id]/command
 * Queue a command for a server
 */
export async function POST(request: NextRequest, context: RouteContext) {
  try {
    // Authentication check
    const session = await auth()
    if (!session || session.user.userType !== 'staff') {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }

    const { id: orderId } = await context.params
    const body: CommandRequest = await request.json()

    // Validate command type
    if (!body.type) {
      return NextResponse.json(
        { error: 'Missing required field: type' },
        { status: 400 }
      )
    }

    if (!ALLOWED_COMMAND_TYPES.includes(body.type)) {
      return NextResponse.json(
        {
          error: `Invalid command type. Allowed types: ${ALLOWED_COMMAND_TYPES.join(', ')}`,
        },
        { status: 400 }
      )
    }

    // Find server connection by order ID
    const serverConnection = await prisma.serverConnection.findUnique({
      where: { orderId },
      include: {
        order: {
          select: { domain: true, serverIp: true },
        },
      },
    })

    if (!serverConnection) {
      return NextResponse.json(
        { error: 'Server connection not found' },
        { status: 404 }
      )
    }

    // Check if server is registered
    if (serverConnection.status === 'PENDING') {
      return NextResponse.json(
        { error: 'Server has not registered with Hub yet' },
        { status: 400 }
      )
    }

    // Queue the command
    const command = await prisma.remoteCommand.create({
      data: {
        serverConnectionId: serverConnection.id,
        type: body.type,
        payload: (body.payload || {}) as object,
        initiatedBy: session?.user?.email || 'unknown',
      },
    })

    return NextResponse.json({
      success: true,
      command: {
        id: command.id,
        type: command.type,
        status: command.status,
        queuedAt: command.queuedAt,
      },
      server: {
        domain: serverConnection.order.domain,
        ip: serverConnection.order.serverIp,
        status: serverConnection.status,
        lastHeartbeat: serverConnection.lastHeartbeat,
      },
    })
  } catch (error) {
    console.error('Queue command error:', error)
    return NextResponse.json(
      { error: 'Internal server error' },
      { status: 500 }
    )
  }
}