import { BaseSchema } from '@adonisjs/lucid/schema'

/**
 * is_readable_name(): generic folder/file names (VIDEO_TS, Sample, CD1) are
 * no name either. Same list as GENERIC_NAMES in lib/release/release_key.ts.
 */
const FUNCTION = (generic: boolean) => `
  CREATE OR REPLACE FUNCTION is_readable_name(name text) RETURNS boolean IMMUTABLE LANGUAGE sql AS $$
    WITH s AS (SELECT regexp_replace(name_stem(name), '\\.[A-Za-z0-9]{1,4}$', '') AS stem)
    SELECT name IS NOT NULL AND NOT (
      (stem ~ '^[A-Za-z0-9]{16,}$' AND stem ~ '[a-z]' AND stem ~ '[A-Z]'
        AND (stem ~ '\\d' OR length(regexp_replace(stem, '[^A-Z]', '', 'g')) >= 6))
      OR stem ~* '^[0-9a-f]{16,}$'
      OR stem ~* '^[0-9a-f]{16,}\\.\\d{9,}$'
      OR stem ~* '^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$'
      OR stem ~ '^\\d{6,}( n){0,1}$'
      OR (stem ~ '^[a-z0-9]{12,}$' AND length(regexp_replace(stem, '\\D', '', 'g')) >= 2
          AND length(regexp_replace(stem, '[^a-z]', '', 'g')) >= 4)
      OR (stem ~ '^[A-Za-z0-9]{8,15}$' AND stem ~ '\\d' AND stem ~ '[a-z]'
          AND length(regexp_replace(substr(stem, 2), '[^A-Z]', '', 'g')) >= 3)
      ${generic ? `OR btrim(stem) ~* '^(video_ts|audio_ts|bdmv|certificate|hvdvd_ts|samples{0,1}|subs{0,1}|subtitles{0,1}|proof|cover|covers|extras{0,1}|featurettes{0,1}|(cd|dvd|disc|disk)[ ._-]{0,1}\\d{1,2})$'` : ''})
    FROM s
  $$`

export default class extends BaseSchema {
  async up() {
    this.defer(async (db) => {
      await db.rawQuery(FUNCTION(true))
    })
  }

  async down() {
    this.defer(async (db) => {
      await db.rawQuery(FUNCTION(false))
    })
  }
}