#!/usr/bin/env node
/**
 * TICKET-012: Migrar glosarios del frontend al backend.
 * Lee backend/scripts/fixtures/glossary-migration.json e inserta en tes_content.glossary_terms.
 *
 * Requisitos: tabla glossary_terms creada (npm run migrate:glossary).
 * Opcional: generar fixture antes con npx tsx backend/scripts/generate-glossary-fixture.ts (desde raíz del repo).
 *
 * Uso: cd backend && node scripts/migrate-glossary-from-frontend.js
 */

import { readFile } from 'fs/promises';
import { join, dirname } from 'path';
import { fileURLToPath } from 'url';
import { query } from '../config/database.js';
import 'dotenv/config';

const __dirname = dirname(fileURLToPath(import.meta.url));
const fixturePath = join(__dirname, 'fixtures', 'glossary-migration.json');

const SYSTEM_USER_ID = '00000000-0000-0000-0000-000000000001';

async function getFirstUserId() {
  const tables = ['tes_content.users', 'emerges_content.users'];
  for (const table of tables) {
    try {
      const result = await query(
        `SELECT id FROM ${table} WHERE is_active = true LIMIT 1`
      );
      if (result.rows.length > 0) {
        return result.rows[0].id;
      }
    } catch {
      continue;
    }
  }
  return SYSTEM_USER_ID;
}

async function termExists(term, category) {
  const result = await query(
    `SELECT 1 FROM tes_content.glossary_terms WHERE LOWER(term) = LOWER($1) AND category = $2 LIMIT 1`,
    [term, category]
  );
  return result.rows.length > 0;
}

async function main() {
  console.log('🔧 TICKET-012: Migración de glosarios frontend → backend\n');

  let data;
  try {
    const raw = await readFile(fixturePath, 'utf-8');
    data = JSON.parse(raw);
  } catch (err) {
    console.error('❌ No se encontró o no se pudo leer', fixturePath);
    console.error('   Genera el fixture desde la raíz del repo:');
    console.error('   npx tsx backend/scripts/generate-glossary-fixture.ts\n');
    process.exit(1);
  }

  const terms = data.terms || [];
  if (terms.length === 0) {
    console.log('⚠️  El fixture no contiene términos. Nada que migrar.');
    process.exit(0);
  }

  const userId = await getFirstUserId();
  if (userId === SYSTEM_USER_ID) {
    console.log('⚠️  No se encontró usuario en BD; usando ID de sistema para created_by.\n');
  }

  let inserted = 0;
  let skipped = 0;

  for (const row of terms) {
    const { term, abbreviation, category, definition, context, source } = row;
    if (!term || !definition || !category) {
      skipped++;
      continue;
    }
    if (!['pharmaceutical', 'anatomical', 'clinical', 'procedural'].includes(category)) {
      skipped++;
      continue;
    }

    const exists = await termExists(term, category);
    if (exists) {
      skipped++;
      continue;
    }

    await query(
      `INSERT INTO tes_content.glossary_terms (
        id, term, abbreviation, category, definition, context, source, status,
        created_at, updated_at, created_by, updated_by
      ) VALUES (
        uuid_generate_v4(), $1, $2, $3, $4, $5, $6, 'published'::tes_content.content_status,
        NOW(), NOW(), $7, $7
      )`,
      [term, abbreviation || null, category, definition, context || null, source || null, userId]
    );
    inserted++;
  }

  console.log(`✅ Migración completada: ${inserted} insertados, ${skipped} omitidos (ya existían o inválidos).\n`);
}

main().catch((err) => {
  console.error('❌ Error:', err.message);
  process.exit(1);
});