import { NextRequest, NextResponse } from 'next/server';
import { z } from 'zod';
import { getSession } from '@/lib/auth';
import { getGHLClientForUser } from '@/lib/ghl/helpers';

export async function GET(request: NextRequest) {
  const session = await getSession();
  if (!session) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const ghl = await getGHLClientForUser(session.user.id);
  if (!ghl) {
    return NextResponse.json({ error: 'GHL not configured' }, { status: 400 });
  }

  const { searchParams } = new URL(request.url);
  const pipelineId = searchParams.get('pipelineId') || undefined;
  const pipelineStageId = searchParams.get('stageId') || undefined;
  const status = searchParams.get('status') as 'open' | 'won' | 'lost' | 'abandoned' | 'all' || undefined;
  const limit = parseInt(searchParams.get('limit') || '50');

  try {
    const opportunities = await ghl.opportunities.getAll({
      pipelineId,
      pipelineStageId,
      status,
      limit,
    });
    return NextResponse.json(opportunities);
  } catch (error) {
    console.error('Failed to get opportunities:', error);
    return NextResponse.json({ error: 'Failed to fetch opportunities' }, { status: 500 });
  }
}

const createOpportunitySchema = z.object({
  name: z.string().min(1),
  pipelineId: z.string(),
  pipelineStageId: z.string(),
  contactId: z.string(),
  monetaryValue: z.number().optional(),
  status: z.enum(['open', 'won', 'lost', 'abandoned']).optional(),
});

export async function POST(request: NextRequest) {
  const session = await getSession();
  if (!session) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  const ghl = await getGHLClientForUser(session.user.id);
  if (!ghl) {
    return NextResponse.json({ error: 'GHL not configured' }, { status: 400 });
  }

  try {
    const body = await request.json();
    const validated = createOpportunitySchema.parse(body);

    const opportunity = await ghl.opportunities.create(validated);
    return NextResponse.json(opportunity, { status: 201 });
  } catch (error) {
    if (error instanceof z.ZodError) {
      return NextResponse.json({ error: 'Validation failed', details: error.issues }, { status: 400 });
    }
    console.error('Failed to create opportunity:', error);
    return NextResponse.json({ error: 'Failed to create opportunity' }, { status: 500 });
  }
}