import { NextResponse } from 'next/server';
import { civicrmApi } from '@/lib/civicrm';
import mapping from '@/config/mapping.json';

export async function GET(request) {
  const { searchParams } = new URL(request.url);
  const orgId = searchParams.get('orgId');
  const contactId = searchParams.get('contactId');

  if (!orgId || !contactId) {
    return NextResponse.json({ error: 'Missing orgId or contactId' }, { status: 400 });
  }

  try {
    // 1. Fetch current stage from Organization (Contact record with type Organization)
    const orgResult = await civicrmApi('Contact', 'get', {
      select: [mapping.stageField],
      where: [['id', '=', parseInt(orgId)]],
    });

    const currentStage = orgResult.values[0]?.[mapping.stageField] || 0;

    // 2. Prepare select fields for pre-filling contact data
    const selectFields = ['id'];
    mapping.stages.forEach(stage => {
      stage.fields.forEach(field => {
        if (field.entity === 'Contact') {
          selectFields.push(field.crmField);
        }
      });
    });

    // 3. Fetch contact data for pre-filling
    const contactResult = await civicrmApi('Contact', 'get', {
      select: selectFields,
      where: [['id', '=', parseInt(contactId)]],
    });

    const contactData = contactResult.values[0] || {};

    return NextResponse.json({
      currentStage: parseInt(currentStage),
      prefillData: contactData,
    });
  } catch (error) {
    console.error('API Error:', error);
    // Return mock data if CiviCRM is not reachable (for development/demo)
    if (process.env.NODE_ENV === 'development') {
        return NextResponse.json({
            currentStage: 2,
            prefillData: {
                first_name: 'John',
                last_name: 'Doe',
                'email_primary.email': 'john@example.com'
            }
        });
    }
    return NextResponse.json({ error: 'Internal Server Error' }, { status: 500 });
  }
}