-- Migration 032: Anlage-Nummern für bestehende Anlagegüter ohne Nummer nachgenerieren
-- Weist assets mit leerem anlage_nr Nummern im konfigurierten Format zu.

CREATE TEMPORARY TABLE IF NOT EXISTS _anlage_backfill_tmp AS
SELECT
    a.id,
    YEAR(COALESCE(a.anschaffungsdatum, NOW())) AS asset_year,
    cs.anlage_nr_prefix AS prefix,
    cs.anlage_nr_next + (ROW_NUMBER() OVER (ORDER BY a.id) - 1) AS seq_nr
FROM assets a
CROSS JOIN company_settings cs
WHERE a.anlage_nr = '' AND cs.id = 1;

UPDATE assets a
JOIN _anlage_backfill_tmp t ON a.id = t.id
SET a.anlage_nr = CONCAT(t.prefix, '-', t.asset_year, '-', LPAD(t.seq_nr, 4, '0'))
WHERE a.anlage_nr = '';

UPDATE company_settings
SET anlage_nr_next = anlage_nr_next + (SELECT COUNT(*) FROM _anlage_backfill_tmp)
WHERE id = 1 AND (SELECT COUNT(*) FROM _anlage_backfill_tmp) > 0;

DROP TEMPORARY TABLE IF EXISTS _anlage_backfill_tmp;