-- ═══════════════════════════════════════════════════════════════
-- 013  DROP events.host_org_id
--
-- Run this only once 012 is deployed and the site is reading
-- hosts off event_hosts. Until then the column is the rollback:
-- restoring the old v_events is one CREATE VIEW away.
--
-- SQLite refuses DROP COLUMN while the column is named by an index
-- or a view, so both go first and the view comes back unchanged
-- apart from no longer selecting e.host_org_id through e.*. No
-- table rebuild, so no PRAGMA foreign_keys dance.
--
-- Check nothing still reads it before running:
--   grep -rn host_org_id server/src client/src
--
--   PRAGMA user_version;   -- reads 12 before this file
-- ═══════════════════════════════════════════════════════════════

DROP INDEX IF EXISTS events_host_idx;
DROP VIEW  IF EXISTS v_events;

ALTER TABLE events DROP COLUMN host_org_id;

CREATE VIEW v_events AS
SELECT
  e.*,
  h.host_kind,
  h.host_id,
  h.host_name,
  h.host_org_kind,
  COALESCE(e.org_logo, h.host_logo)  AS effective_org_logo,
  COALESCE(e.color,    h.host_color) AS effective_color,
  COALESCE(
    e.status,
    CASE WHEN e.ends_on IS NOT NULL AND e.ends_on < date('now')
         THEN 'past' ELSE 'upcoming' END
  )                                  AS effective_status
FROM events e
LEFT JOIN v_event_hosts h
  ON h.id = (
    SELECT x.id
      FROM v_event_hosts x
     WHERE x.event_id = e.id
     ORDER BY x.sort_order, x.id
     LIMIT 1
  );

PRAGMA user_version = 13;  -- ← set to this migration's number