import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from "@/app/api/auth/options";
import { prisma } from '@/lib/prisma';
import { N8nService } from '@/lib/services/n8n-service';
import { Prisma } from '@prisma/client';

// Types
interface MissionCreateInput {
  name: string;
  oddScope: string[];
  niveau?: string;
  intention?: string;
  missionType?: string;
  donneurDOrdre?: string;
  projection?: string;
  services?: string[];
  participation?: string;
  profils?: string[];
  guardians?: Record<string, string>;
  volunteers?: string[];
  creatorId?: string;
  logo?: {
    data: string;
    name?: string;
    type?: string;
  } | null;
  attachments?: Array<{
    data: string;
    name?: string;
    type?: string;
  }>;
  leantimeProjectId?: string | null;
  outlineCollectionId?: string | null;
  rocketChatChannelId?: string | null;
  giteaRepositoryUrl?: string | null;
  penpotProjectId?: string | null;
}

interface MissionUserInput {
  role: string;
  userId: string;
  missionId: string;
}

interface MissionResponse {
  id: string;
  name: string;
  oddScope: string[];
  niveau: string;
  intention: string;
  missionType: string;
  donneurDOrdre: string;
  projection: string;
  services: string[];
  profils: string[];
  participation: string;
  creatorId: string;
  logo: string | null;
  leantimeProjectId: string | null;
  outlineCollectionId: string | null;
  rocketChatChannelId: string | null;
  giteaRepositoryUrl: string | null;
  penpotProjectId: string | null;
  createdAt: Date;
  updatedAt: Date;
}

// Helper function to check authentication
async function checkAuth(request: Request) {
  const session = await getServerSession(authOptions);
  return {
    authorized: !!session?.user,
    userId: session?.user?.id
  };
}

// GET endpoint to list missions
export async function GET(request: Request) {
  try {
    const { authorized, userId } = await checkAuth(request);
    if (!authorized || !userId) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const { searchParams } = new URL(request.url);
    const limit = Number(searchParams.get('limit') || '10');
    const offset = Number(searchParams.get('offset') || '0');
    const search = searchParams.get('search');
    const name = searchParams.get('name');

    const where: Prisma.MissionWhereInput = {};
    
    if (search) {
      where.OR = [
        { name: { contains: search, mode: 'insensitive' } },
        { intention: { contains: search, mode: 'insensitive' } }
      ];
    }

    if (name) {
      where.name = name;
    }

    const missions = await prisma.mission.findMany({
      where,
      skip: offset,
      take: limit,
      orderBy: { createdAt: 'desc' },
      include: {
        creator: {
          select: {
            id: true,
            email: true
          }
        },
        missionUsers: {
          include: {
            user: {
              select: {
                id: true,
                email: true
              }
            }
          }
        }
      }
    });

    const totalCount = await prisma.mission.count({ where });

    return NextResponse.json({
      missions,
      pagination: {
        total: totalCount,
        offset,
        limit
      }
    });
  } catch (error) {
    console.error('Error listing missions:', error);
    return NextResponse.json({ 
      error: 'Internal server error', 
      details: error instanceof Error ? error.message : String(error) 
    }, { status: 500 });
  }
}

// POST endpoint to create a new mission
export async function POST(request: Request) {
  try {
    const { authorized, userId } = await checkAuth(request);
    if (!authorized || !userId) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
    }

    const body = await request.json();
    
    // Simple validation
    if (!body.name || !body.oddScope) {
      return NextResponse.json({ 
        error: 'Missing required fields', 
        missingFields: ['name', 'oddScope'].filter(field => !body[field])
      }, { status: 400 });
    }

    // Check if this is a request from n8n
    const isN8nRequest = request.headers.get('x-api-key') === process.env.N8N_API_KEY;

    if (!isN8nRequest) {
      const n8nService = new N8nService();
      
      // Simple data preparation for n8n
      const n8nData = {
        ...body,
        creatorId: userId,
        config: {
          N8N_API_KEY: process.env.N8N_API_KEY,
          MISSION_API_URL: process.env.NEXT_PUBLIC_API_URL
        }
      };

      const workflowResult = await n8nService.triggerMissionCreation(n8nData);
      
      if (!workflowResult.success) {
        return NextResponse.json({ 
          error: 'Failed to create mission resources', 
          details: workflowResult.error
        }, { status: 500 });
      }

      return NextResponse.json({
        success: true,
        message: 'Mission creation initiated',
        mission: body
      });
    }

    // Create mission directly (n8n request)
    const missionData: Prisma.MissionUncheckedCreateInput = {
      name: body.name,
      oddScope: body.oddScope,
      niveau: body.niveau,
      intention: body.intention,
      missionType: body.missionType,
      donneurDOrdre: body.donneurDOrdre,
      projection: body.projection,
      services: body.services,
      profils: body.profils,
      participation: body.participation,
      creatorId: userId,
      logo: body.logo,
      leantimeProjectId: body.leantimeProjectId,
      outlineCollectionId: body.outlineCollectionId,
      rocketChatChannelId: body.rocketChatChannelId,
      giteaRepositoryUrl: body.giteaRepositoryUrl,
      penpotProjectId: body.penpotProjectId
    };

    const mission = await prisma.mission.create({
      data: missionData
    });

    return NextResponse.json({ success: true, mission });
  } catch (error) {
    console.error('Error creating mission:', error);
    return NextResponse.json({ 
      error: 'Failed to create mission',
      details: error instanceof Error ? error.message : String(error)
    }, { status: 500 });
  }
}