import { NextResponse } from 'next/server';
import { prisma } from '@/lib/prisma';
import { logger } from '@/lib/logger';

/**
 * POST /api/missions/mission-created
 * 
 * Endpoint appelé par N8N après la création des intégrations externes.
 * Reçoit les IDs des intégrations créées et met à jour la mission en base.
 * 
 * Headers attendus:
 * - Authorization: Bearer {keycloak_token} (optionnel, vérifié via x-api-key)
 * - x-api-key: {N8N_API_KEY}
 * 
 * Body attendu (format N8N):
 * {
 *   name: string,
 *   creatorId: string,
 *   gitRepoUrl?: string,
 *   leantimeProjectId?: string,
 *   documentationCollectionId?: string,
 *   rocketchatChannelId?: string,
 *   // ... autres champs optionnels
 * }
 */
export async function POST(request: Request) {
  try {
    logger.debug('Mission Created Webhook Received');
    
    // Vérifier l'API key
    const apiKey = request.headers.get('x-api-key');
    const expectedApiKey = process.env.N8N_API_KEY;
    
    if (!expectedApiKey) {
      logger.error('N8N_API_KEY not configured in environment');
      return NextResponse.json(
        { error: 'Server configuration error' },
        { status: 500 }
      );
    }
    
    if (apiKey !== expectedApiKey) {
      logger.error('Invalid API key', {
        received: apiKey ? 'present' : 'missing',
        expected: expectedApiKey ? 'configured' : 'missing'
      });
      return NextResponse.json(
        { error: 'Unauthorized' },
        { status: 401 }
      );
    }
    
    const body = await request.json();
    logger.debug('Received mission-created data', {
      hasMissionId: !!body.missionId,
      hasName: !!body.name,
      hasCreatorId: !!body.creatorId
    });
    
    // Validation des champs requis
    // Prefer missionId if provided, otherwise use name + creatorId
    let mission;
    
    if (body.missionId) {
      // ✅ Use missionId if provided (more reliable)
      logger.debug('Looking up mission by ID', { missionId: body.missionId });
      mission = await prisma.mission.findUnique({
        where: { id: body.missionId }
      });
    } else if (body.name && body.creatorId) {
      // Fallback to name + creatorId (for backward compatibility)
      logger.debug('Looking up mission by name + creatorId', {
        name: body.name,
        creatorId: body.creatorId
      });
      mission = await prisma.mission.findFirst({
        where: {
          name: body.name,
          creatorId: body.creatorId
        },
        orderBy: {
          createdAt: 'desc' // Prendre la plus récente
        }
      });
    } else {
      logger.error('Missing required fields', {
        hasMissionId: !!body.missionId,
        hasName: !!body.name,
        hasCreatorId: !!body.creatorId
      });
      return NextResponse.json(
        { error: 'Missing required fields: missionId OR (name and creatorId)' },
        { status: 400 }
      );
    }
    
    if (!mission) {
      logger.error('Mission not found', {
        missionId: body.missionId,
        name: body.name,
        creatorId: body.creatorId
      });
      return NextResponse.json(
        { error: 'Mission not found' },
        { status: 404 }
      );
    }
    
    logger.debug('Found mission', {
      id: mission.id,
      name: mission.name,
      hasIntegrations: {
        gitea: !!mission.giteaRepositoryUrl,
        leantime: !!mission.leantimeProjectId,
        outline: !!mission.outlineCollectionId,
        rocketChat: !!mission.rocketChatChannelId
      }
    });
    
    // Préparer les données de mise à jour
    const updateData: {
      giteaRepositoryUrl?: string | null;
      leantimeProjectId?: string | null;
      outlineCollectionId?: string | null;
      rocketChatChannelId?: string | null;
    } = {};
    
    // Mapper les champs N8N vers notre schéma Prisma
    if (body.gitRepoUrl !== undefined) {
      updateData.giteaRepositoryUrl = body.gitRepoUrl || null;
      logger.debug('Updating giteaRepositoryUrl', { hasUrl: !!body.gitRepoUrl });
    }
    
    if (body.leantimeProjectId !== undefined) {
      // N8N peut retourner un number, on le convertit en string
      updateData.leantimeProjectId = body.leantimeProjectId 
        ? String(body.leantimeProjectId) 
        : null;
      logger.debug('Updating leantimeProjectId', { hasId: !!updateData.leantimeProjectId });
    }
    
    if (body.documentationCollectionId !== undefined) {
      updateData.outlineCollectionId = body.documentationCollectionId || null;
      logger.debug('Updating outlineCollectionId', { hasId: !!updateData.outlineCollectionId });
    }
    
    if (body.rocketchatChannelId !== undefined) {
      updateData.rocketChatChannelId = body.rocketchatChannelId || null;
      logger.debug('Updating rocketChatChannelId', { hasId: !!updateData.rocketChatChannelId });
    }
    
    // Vérifier qu'il y a au moins un champ à mettre à jour
    if (Object.keys(updateData).length === 0) {
      logger.warn('No integration IDs to update');
      return NextResponse.json({
        message: 'Mission found but no integration IDs provided',
        mission: {
          id: mission.id,
          name: mission.name
        }
      });
    }
    
    // Mettre à jour la mission
    const updatedMission = await prisma.mission.update({
      where: { id: mission.id },
      data: updateData
    });
    
    logger.debug('Mission updated successfully', {
      id: updatedMission.id,
      name: updatedMission.name,
      updatedFields: Object.keys(updateData)
    });
    
    return NextResponse.json({
      success: true,
      message: 'Mission updated successfully',
      mission: {
        id: updatedMission.id,
        name: updatedMission.name,
        giteaRepositoryUrl: updatedMission.giteaRepositoryUrl,
        leantimeProjectId: updatedMission.leantimeProjectId,
        outlineCollectionId: updatedMission.outlineCollectionId,
        rocketChatChannelId: updatedMission.rocketChatChannelId
      }
    });
    
  } catch (error) {
    logger.error('Error in mission-created webhook', {
      error: error instanceof Error ? error.message : String(error)
    });
    return NextResponse.json(
      { 
        error: 'Failed to update mission',
        details: error instanceof Error ? error.message : String(error)
      },
      { status: 500 }
    );
  }
}