import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from "@/app/api/auth/options";
import { prisma } from '@/lib/prisma';
import { deleteMissionLogo } from '@/lib/mission-uploads';
import { getPublicUrl, S3_CONFIG } from '@/lib/s3';
import { IntegrationService } from '@/lib/services/integration-service';

// Helper function to check authentication
async function checkAuth(request: Request) {
  const session = await getServerSession(authOptions);
  if (!session?.user?.id) {
    console.error('Unauthorized access attempt:', {
      url: request.url,
      method: request.method,
      headers: Object.fromEntries(request.headers)
    });
    return { authorized: false, userId: null };
  }
  return { authorized: true, userId: session.user.id };
}

// GET endpoint to retrieve a mission by ID
export async function GET(request: Request, props: { params: Promise<{ missionId: string }> }) {
  const params = await props.params;
  try {
    const { authorized, userId } = await checkAuth(request);
    if (!authorized || !userId) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const { missionId } = params;
    if (!missionId) {
      return NextResponse.json({ error: 'Mission ID is required' }, { status: 400 });
    }

    // Get mission with detailed info
    const mission = await (prisma as any).mission.findFirst({
      where: {
        id: missionId,
        OR: [
          { creatorId: userId },
          { missionUsers: { some: { userId } } }
        ]
      },
      include: {
        creator: {
          select: {
            id: true,
            email: true
          }
        },
        missionUsers: {
          select: {
            id: true,
            role: true,
            user: {
              select: {
                id: true,
                email: true
              }
            }
          }
        },
        attachments: {
          select: {
            id: true,
            filename: true,
            filePath: true,
            fileType: true,
            fileSize: true,
            createdAt: true
          },
          orderBy: { createdAt: 'desc' }
        }
      }
    });

    if (!mission) {
      return NextResponse.json({ error: 'Mission not found or access denied' }, { status: 404 });
    }
    
    // Add public URLs to mission logo and attachments
    const missionWithUrls = {
      ...mission,
      logoUrl: mission.logo ? `/api/centrale/image/${mission.logo}` : null,
      attachments: mission.attachments.map((attachment: { id: string; filename: string; filePath: string; fileType: string; fileSize: number; createdAt: Date }) => ({
        ...attachment,
        publicUrl: `/api/centrale/image/${attachment.filePath}`
      }))
    };

    return NextResponse.json(missionWithUrls);
  } catch (error) {
    console.error('Error retrieving mission:', error);
    return NextResponse.json({ 
      error: 'Internal server error', 
      details: error instanceof Error ? error.message : String(error) 
    }, { status: 500 });
  }
}