/**
 * Debug API to check session links
 */

import { NextResponse } from 'next/server';
import { getAdminAuth, getAdminDb } from '@/lib/firebase/admin';

export async function GET(request: Request) {
  try {
    const authHeader = request.headers.get('Authorization');
    if (!authHeader?.startsWith('Bearer ')) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const idToken = authHeader.split('Bearer ')[1];
    const adminAuth = getAdminAuth();
    const adminDb = getAdminDb();
    
    let userId: string;
    try {
      const decodedToken = await adminAuth.verifyIdToken(idToken);
      userId = decodedToken.uid;
    } catch (error) {
      return NextResponse.json({ error: 'Invalid token' }, { status: 401 });
    }

    // Get all user's sessions
    const sessionsSnapshot = await adminDb
      .collection('sessions')
      .where('userId', '==', userId)
      .get();

    const linked: any[] = [];
    const unlinked: any[] = [];

    sessionsSnapshot.docs.forEach(doc => {
      const data = doc.data();
      const sessionInfo = {
        id: doc.id,
        workspaceName: data.workspaceName || 'Unknown',
        workspacePath: data.workspacePath,
        projectId: data.projectId,
        needsProjectAssociation: data.needsProjectAssociation,
        createdAt: data.createdAt?.toDate?.() || data.createdAt,
      };

      if (data.projectId) {
        linked.push(sessionInfo);
      } else {
        unlinked.push(sessionInfo);
      }
    });

    // Get all user's projects
    const projectsSnapshot = await adminDb
      .collection('projects')
      .where('userId', '==', userId)
      .get();

    const projects = projectsSnapshot.docs.map(doc => ({
      id: doc.id,
      name: doc.data().productName || doc.data().name,
      workspacePath: doc.data().workspacePath,
    }));

    return NextResponse.json({
      summary: {
        totalSessions: sessionsSnapshot.size,
        linkedSessions: linked.length,
        unlinkedSessions: unlinked.length,
        totalProjects: projects.length,
      },
      linked,
      unlinked,
      projects,
    });
  } catch (error) {
    console.error('Debug check error:', error);
    return NextResponse.json(
      {
        error: 'Failed to check links',
        details: error instanceof Error ? error.message : String(error),
      },
      { status: 500 }
    );
  }
}