#!/usr/bin/env node
/**
 * Erstellt den Phase-1-Deutschkurs für Bisaya-Lernende.
 *
 * Verwendung:
 * node backend/scripts/create-german-for-bisaya-course.js <ownerHashedId>
 */

import crypto from 'crypto';
import { Op } from 'sequelize';
import { sequelize } from '../utils/sequelize.js';
import VocabCourse from '../models/community/vocab_course.js';
import VocabCourseLesson from '../models/community/vocab_course_lesson.js';
import User from '../models/community/user.js';
import { GERMAN_FOR_BISAYA_PHASE1_DIDACTICS, GERMAN_FOR_BISAYA_PHASE1_LESSONS } from './german-for-bisaya-phase1.js';
import { GERMAN_FOR_BISAYA_PHASE3_DIDACTICS, GERMAN_FOR_BISAYA_PHASE3_LESSONS } from './german-for-bisaya-phase3-extension.js';
import { GERMAN_FOR_BISAYA_PHASE4_DIDACTICS, GERMAN_FOR_BISAYA_PHASE4_LESSONS } from './german-for-bisaya-phase4-extension.js';
import { GERMAN_FOR_BISAYA_PHASE5_DIDACTICS, GERMAN_FOR_BISAYA_PHASE5_LESSONS } from './german-for-bisaya-phase5-extension.js';
import { getGermanForBisayaLessonPedagogy } from './german-for-bisaya-phase2-pedagogy.js';

const ALL_GERMAN_FOR_BISAYA_LESSONS = [
  ...GERMAN_FOR_BISAYA_PHASE1_LESSONS,
  ...GERMAN_FOR_BISAYA_PHASE3_LESSONS,
  ...GERMAN_FOR_BISAYA_PHASE4_LESSONS,
  ...GERMAN_FOR_BISAYA_PHASE5_LESSONS
];

const ALL_GERMAN_FOR_BISAYA_DIDACTICS = {
  ...GERMAN_FOR_BISAYA_PHASE1_DIDACTICS,
  ...GERMAN_FOR_BISAYA_PHASE3_DIDACTICS,
  ...GERMAN_FOR_BISAYA_PHASE4_DIDACTICS,
  ...GERMAN_FOR_BISAYA_PHASE5_DIDACTICS
};

async function getLanguageId(languageName) {
  const [language] = await sequelize.query(
    `SELECT id FROM community.vocab_language WHERE name = :name LIMIT 1`,
    {
      replacements: { name: languageName },
      type: sequelize.QueryTypes.SELECT
    }
  );

  if (!language) {
    throw new Error(`Sprache "${languageName}" nicht gefunden`);
  }

  return Number(language.id);
}

async function getOwnerByHashedId(ownerHashedId) {
  const user = await User.findOne({ where: { hashedId: ownerHashedId } });
  if (!user) {
    throw new Error(`Benutzer mit hashedId "${ownerHashedId}" nicht gefunden`);
  }
  return user;
}

async function createGermanForBisayaCourse(ownerHashedId) {
  await sequelize.authenticate();

  const owner = await getOwnerByHashedId(ownerHashedId);
  const germanLanguageId = await getLanguageId('Deutsch');
  const bisayaLanguageId = await getLanguageId('Bisaya');

  const existingCourse = await VocabCourse.findOne({
    where: {
      ownerUserId: owner.id,
      languageId: germanLanguageId,
      nativeLanguageId: bisayaLanguageId,
      title: {
        [Op.like]: 'Deutsch für Bisaya-Lernende%'
      }
    }
  });

  if (existingCourse) {
    console.log(`Kurs bereits vorhanden: ${existingCourse.title} (ID: ${existingCourse.id})`);
    return existingCourse;
  }

  const shareCode = crypto.randomBytes(8).toString('hex');
  const course = await VocabCourse.create({
      ownerUserId: owner.id,
      title: 'Deutsch für Bisaya-Lernende - Alltag & Stabilisierung',
      description: '15 Wochen Deutsch-Lernpfad aus Sicht von Bisaya-Lernenden mit Alltag, Fehlertraining, Intensivwiederholung und Stabilisierung.',
    languageId: germanLanguageId,
    nativeLanguageId: bisayaLanguageId,
    difficultyLevel: 1,
    isPublic: false,
    shareCode
  });

  for (const lessonData of ALL_GERMAN_FOR_BISAYA_LESSONS) {
    const didactics = ALL_GERMAN_FOR_BISAYA_DIDACTICS[lessonData.title] || {};
    const pedagogy = getGermanForBisayaLessonPedagogy(lessonData.num, lessonData.type);

    await VocabCourseLesson.create({
      courseId: course.id,
      chapterId: null,
      lessonNumber: lessonData.num,
      title: lessonData.title,
      description: lessonData.desc,
      weekNumber: lessonData.week,
      dayNumber: lessonData.day,
      lessonType: lessonData.type,
      didacticMode: pedagogy.didacticMode,
      phaseLabel: pedagogy.phaseLabel,
      blockNumber: pedagogy.blockNumber,
      difficultyWeight: pedagogy.difficultyWeight,
      newUnitTarget: pedagogy.newUnitTarget,
      reviewWeight: pedagogy.reviewWeight,
      isIntensiveReview: pedagogy.isIntensiveReview,
      culturalNotes: lessonData.cultural,
      learningGoals: didactics.learningGoals || null,
      corePatterns: didactics.corePatterns || null,
      grammarFocus: didactics.grammarFocus || null,
      speakingPrompts: didactics.speakingPrompts || null,
      practicalTasks: didactics.practicalTasks || null,
      targetMinutes: lessonData.targetMin,
      targetScorePercent: lessonData.targetScore,
      requiresReview: lessonData.review
    });
  }

  console.log(`Kurs erstellt: ${course.title} (ID: ${course.id})`);
  console.log(`Lektionen erstellt: ${ALL_GERMAN_FOR_BISAYA_LESSONS.length}`);
  return course;
}

if (import.meta.url === `file://${process.argv[1]}`) {
  const ownerHashedId = process.argv[2];

  if (!ownerHashedId) {
    console.error('Verwendung: node backend/scripts/create-german-for-bisaya-course.js <ownerHashedId>');
    process.exit(1);
  }

  createGermanForBisayaCourse(ownerHashedId)
    .then(() => process.exit(0))
    .catch((error) => {
      console.error(error);
      process.exit(1);
    });
}