#!/usr/bin/env node
/**
 * Erweitert bestehende Bisaya-Kurse von 4 auf 6 Wochen.
 *
 * Verwendung:
 * node backend/scripts/extend-bisaya-course-phase3.js
 */

import { sequelize } from '../utils/sequelize.js';
import VocabCourse from '../models/community/vocab_course.js';
import VocabCourseLesson from '../models/community/vocab_course_lesson.js';
import { getBisayaLessonPedagogy } from './bisaya-course-phase2-pedagogy.js';
import { BISAYA_PHASE3_DIDACTICS, BISAYA_PHASE3_LESSONS } from './bisaya-course-phase3-extension.js';

async function extendBisayaCoursePhase3() {
  await sequelize.authenticate();

  const [bisayaLanguage] = await sequelize.query(
    `SELECT id FROM community.vocab_language WHERE name = 'Bisaya' LIMIT 1`,
    { type: sequelize.QueryTypes.SELECT }
  );

  if (!bisayaLanguage) {
    console.error('❌ Bisaya-Sprache nicht gefunden.');
    return;
  }

  const courses = await VocabCourse.findAll({
    where: { languageId: bisayaLanguage.id }
  });

  let addedLessons = 0;
  let updatedLessons = 0;

  for (const course of courses) {
    await course.update({
      title: 'Bisaya für Familien - Schnellstart in 6 Wochen',
      description: 'Lerne Bisaya (Cebuano) schnell und praktisch für den Familienalltag. Fokus auf Sprechen, Hören, Spiralwiederholung und einem strukturierten 6-Wochen-Plan.'
    });

    for (const lessonData of BISAYA_PHASE3_LESSONS) {
      const existing = await VocabCourseLesson.findOne({
        where: {
          courseId: course.id,
          lessonNumber: lessonData.num
        }
      });

      const didactics = BISAYA_PHASE3_DIDACTICS[lessonData.title] || {};
      const pedagogy = getBisayaLessonPedagogy(lessonData.num) || {};
      const lessonPayload = {
        title: lessonData.title,
        description: lessonData.desc,
        weekNumber: lessonData.week,
        dayNumber: lessonData.day,
        lessonType: lessonData.type,
        culturalNotes: lessonData.cultural,
        learningGoals: didactics.learningGoals || [],
        corePatterns: didactics.corePatterns || [],
        grammarFocus: didactics.grammarFocus || [],
        speakingPrompts: didactics.speakingPrompts || [],
        practicalTasks: didactics.practicalTasks || [],
        targetMinutes: lessonData.targetMin,
        targetScorePercent: lessonData.targetScore,
        requiresReview: lessonData.review,
        didacticMode: pedagogy.didacticMode || null,
        phaseLabel: pedagogy.phaseLabel || null,
        blockNumber: pedagogy.blockNumber ?? null,
        difficultyWeight: pedagogy.difficultyWeight ?? null,
        newUnitTarget: pedagogy.newUnitTarget ?? null,
        reviewWeight: pedagogy.reviewWeight ?? null,
        isIntensiveReview: Boolean(pedagogy.isIntensiveReview)
      };

      if (existing) {
        await existing.update(lessonPayload);
        updatedLessons++;
        console.log(`🔄 Kurs ${course.id}: Lektion ${lessonData.num} - ${lessonData.title} aktualisiert`);
        continue;
      }

      await VocabCourseLesson.create({
        ...lessonPayload,
        courseId: course.id,
        chapterId: null,
        lessonNumber: lessonData.num
      });

      addedLessons++;
      console.log(`✅ Kurs ${course.id}: Lektion ${lessonData.num} - ${lessonData.title} ergänzt`);
    }
  }

  console.log(`\n🎉 Phase 3 vorbereitet.`);
  console.log(`   Kurse: ${courses.length}`);
  console.log(`   Neue Lektionen ergänzt: ${addedLessons}`);
  console.log(`   Bestehende Lektionen aktualisiert: ${updatedLessons}`);
  console.log('   Danach create-bisaya-course-content.js ausführen, wenn für die neuen Lektionen zusätzliche Übungen eingespielt werden sollen.');
}

extendBisayaCoursePhase3()
  .then(() => {
    sequelize.close();
    process.exit(0);
  })
  .catch((error) => {
    console.error('❌ Fehler:', error);
    sequelize.close();
    process.exit(1);
  });