'use strict';

const AMBIGUOUS_QUESTION = 'Erzähle einen Tagesplan mit drei Schritten und einem Wunsch. Welche Bisaya-Formulierung passt am besten?';
const REPAIRED_QUESTION = 'Wie sagt man auf Bisaya: „Zuerst gehe ich zum Markt.“?';

module.exports = {
  async up(queryInterface) {
    await queryInterface.sequelize.transaction(async (transaction) => {
      // The former free-production prompt has more than one defensible answer,
      // while its multiple-choice data accepts only the first core pattern.
      await queryInterface.sequelize.query(`
        UPDATE community.vocab_grammar_exercise AS exercise
        SET question_data = JSONB_SET(exercise.question_data, '{question}', TO_JSONB(CAST(:repairedQuestion AS text)))
        FROM community.vocab_course_lesson AS lesson
        WHERE exercise.lesson_id = lesson.id
          AND (lesson.id = 38 OR (lesson.course_id = 1 AND lesson.lesson_number = 38))
          AND exercise.question_data->>'type' = 'multiple_choice'
          AND exercise.question_data->>'question' = :ambiguousQuestion;
      `, {
        replacements: { ambiguousQuestion: AMBIGUOUS_QUESTION, repairedQuestion: REPAIRED_QUESTION },
        transaction
      });

      // This lesson is designed for a 78% target. With six questions, five
      // correct answers (83%) must therefore pass.
      await queryInterface.sequelize.query(`
        UPDATE community.vocab_course_lesson
        SET target_score_percent = 78
        WHERE id = 38
           OR (course_id = 1 AND lesson_number = 38);
      `, { transaction });
    });
  },

  async down() {
    // The repair is intentionally not reverted: the old data is ambiguous.
  }
};