import { NextRequest, NextResponse } from 'next/server';
import { z } from 'zod';
import { getSession } from '@/lib/auth';
import { getGHLClient } from '@/lib/api';

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

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

  const { searchParams } = new URL(request.url);
  const limit = parseInt(searchParams.get('limit') || '20');
  const offset = parseInt(searchParams.get('offset') || '0');
  const query = searchParams.get('query') || undefined;

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

const createContactSchema = z.object({
  firstName: z.string().optional(),
  lastName: z.string().optional(),
  email: z.string().email().optional(),
  phone: z.string().optional(),
  tags: z.array(z.string()).optional(),
  customFields: z.array(z.object({
    key: z.string(),
    value: z.any(),
  })).optional(),
});

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

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

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

    const contact = await ghl.contacts.create(validated);
    return NextResponse.json(contact, { 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 contact:', error);
    return NextResponse.json(
      { error: 'Failed to create contact' },
      { status: 500 }
    );
  }
}