'use strict';

/**
 * Removes obsolete or incorrectly split Bisaya SRS cards that were created by
 * older course imports.  The current course content already uses the intended
 * Spanish-derived tens and complete repair phrases.
 */
module.exports = {
  async up(queryInterface) {
    await queryInterface.sequelize.query(`
      DELETE FROM community.vocab_srs_item
      WHERE course_id = 1
        AND (
          lower(learning) ~ '(kawhaan|katloan|kalim[- ]?an|kanum[- ]?an|kap[- ]?atan|kapitoan|kawaloan|kasiyaman)'
          OR lower(reference) ~ '(kawhaan|katloan|kalim[- ]?an|kanum[- ]?an|kap[- ]?atan|kapitoan|kawaloan|kasiyaman)'
        );

      DELETE FROM community.vocab_srs_item
      WHERE course_id = 1
        AND (
          (
            regexp_replace(lower(learning), '[[:punct:][:space:]]', '', 'g') = 'bitte'
            AND regexp_replace(lower(reference), '[[:punct:][:space:]]', '', 'g') = 'palihug'
          )
          OR (
            lower(learning) = 'bitte wiederholen'
            AND lower(reference) IN ('palihug', 'palihug ka mubalik?')
          )
        );
    `);
  },

  async down() {
    // Deleted legacy cards cannot be reconstructed reliably.
  }
};