import fs from 'node:fs';
import { paths } from '../../env.mjs';
import { UF_NAMES } from '../../sources/common.mjs';
import { resolveZipReader } from '../../extract/rfb-extractor.mjs';

export function registerExtractionRoutes(router, { db, jobs }) {
  router.add('POST', '/api/extractions', async (req, res, { json, body }) => {
    const uf = String(body?.uf || '').toUpperCase();
    if (!UF_NAMES[uf]) {
      json(400, { erro: 'informe uma UF valida' });
      return;
    }

    if (!fs.existsSync(paths.rfbRaw)) {
      json(409, { erro: `zips da Receita Federal nao encontrados em ${paths.rfbRaw}. Rode scripts/baixar-base-rfb.sh primeiro.` });
      return;
    }

    try {
      resolveZipReader();
    } catch (error) {
      json(409, { erro: error.message });
      return;
    }

    const running = db.prepare(
      "SELECT id, uf FROM extractions WHERE status IN ('pending','running')"
    ).get();
    if (running) {
      json(409, { erro: `ja existe uma extracao em andamento (${running.uf}). Aguarde terminar.` });
      return;
    }

    const inserted = db.prepare("INSERT INTO extractions (uf, status) VALUES (?, 'pending')").run(uf);
    const extractionId = Number(inserted.lastInsertRowid);

    const jobId = jobs.startJob({
      type: 'extracao',
      script: 'src/extract/extract-job.mjs',
      args: [`--extraction-id=${extractionId}`],
      meta: { extractionId, uf }
    });
    db.prepare('UPDATE extractions SET job_id = ? WHERE id = ?').run(jobId, extractionId);

    json(202, { extractionId, jobId });
  });

  router.add('GET', '/api/extractions', async (req, res, { json }) => {
    const rows = db.prepare(
      `SELECT id, job_id, uf, status, csv_path, total_rows, with_phone, municipios_count,
              progress_json, error, started_at, finished_at, created_at
       FROM extractions ORDER BY id DESC LIMIT 20`
    ).all();
    json(200, {
      extractions: rows.map((row) => ({
        ...row,
        progress: JSON.parse(row.progress_json || 'null'),
        progress_json: undefined
      }))
    });
  });

  router.add('POST', '/api/extractions/:id/cancel', async (req, res, { json, params }) => {
    const row = db.prepare('SELECT job_id, status FROM extractions WHERE id = ?').get(Number(params.id));
    if (!row) {
      json(404, { erro: 'extracao nao encontrada' });
      return;
    }
    const ok = row.job_id ? jobs.cancelJob(row.job_id) : false;
    json(ok ? 202 : 409, ok ? { cancelando: true } : { erro: `nao ha job ativo para cancelar (status: ${row.status})` });
  });
}