import type { FastifyInstance } from 'fastify';
import pino from 'pino';
import { withTenant } from '../data/db.js';

const logger = pino({ name: 'api-discovery' });

export function registerDiscoveryRoutes(app: FastifyInstance) {
  // Trigger AWS discovery scan
  app.post('/api/v1/discovery/aws', async (req, reply) => {
    const tenantId = (req as any).tenantId;
    // TODO: Enqueue scan job (Redis queue or direct execution)
    logger.info({ tenantId }, 'AWS discovery scan triggered');
    return reply.status(202).send({ status: 'scan_queued', scanner: 'aws' });
  });

  // Trigger GitHub discovery scan
  app.post('/api/v1/discovery/github', async (req, reply) => {
    const tenantId = (req as any).tenantId;
    logger.info({ tenantId }, 'GitHub discovery scan triggered');
    return reply.status(202).send({ status: 'scan_queued', scanner: 'github' });
  });

  // Get scan history
  app.get('/api/v1/discovery/history', async (req, reply) => {
    const tenantId = (req as any).tenantId;

    const result = await withTenant(tenantId, async (client) => {
      return client.query('SELECT * FROM scan_history ORDER BY started_at DESC LIMIT 20');
    });

    return { scans: result.rows };
  });

  // List staged updates (from partial scans)
  app.get('/api/v1/discovery/staged', async (req, reply) => {
    const tenantId = (req as any).tenantId;

    const result = await withTenant(tenantId, async (client) => {
      return client.query("SELECT * FROM staged_updates WHERE status = 'pending' ORDER BY created_at DESC");
    });

    return { staged: result.rows };
  });

  // Apply or reject staged update
  app.post('/api/v1/discovery/staged/:id/:action', async (req, reply) => {
    const { id, action } = req.params as { id: string; action: string };
    const tenantId = (req as any).tenantId;

    if (action !== 'apply' && action !== 'reject') {
      return reply.status(400).send({ error: 'Action must be apply or reject' });
    }

    const newStatus = action === 'apply' ? 'applied' : 'rejected';

    await withTenant(tenantId, async (client) => {
      await client.query('UPDATE staged_updates SET status = $1 WHERE id = $2', [newStatus, id]);
      // TODO: If applied, merge changes into services table
    });

    return { status: newStatus };
  });
}