-- 0021_jobs_update_kind.sql
--
-- Add 'update' to the jobs.kind CHECK constraint so the agent
-- self-update flow (P6-01) can persist its job rows. SQLite can't
-- ALTER a CHECK in place, so we rebuild the table.
--
-- Same safe rebuild pattern as 0012:
--   1. Stash job_logs into a temp table BEFORE rebuilding jobs.
--   2. Create jobs_new with the wider CHECK; copy data; DROP jobs;
--      RENAME jobs_new TO jobs.
--   3. Restore job_logs (cascade-trap defence — see CLAUDE.md).
--
-- jobs_new mirrors the live schema *including* post-0012 column
-- additions (0015 added source_group_id). When adding a new
-- migration that touches this table, mirror the latest column set.

CREATE TEMPORARY TABLE _job_logs_backup AS
  SELECT job_id, seq, ts, stream, payload FROM job_logs;

CREATE TABLE jobs_new (
  id              TEXT PRIMARY KEY,
  host_id         TEXT NOT NULL REFERENCES hosts(id) ON DELETE CASCADE,
  kind            TEXT NOT NULL CHECK (kind IN
                       ('backup','init','forget','prune','check','unlock','restore','diff','update')),
  status          TEXT NOT NULL CHECK (status IN ('queued','running','succeeded','failed','cancelled')),
  scheduled_id    TEXT REFERENCES schedules(id) ON DELETE SET NULL,
  actor_kind      TEXT NOT NULL CHECK (actor_kind IN ('user','schedule','system')),
  actor_id        TEXT,
  started_at      TEXT,
  finished_at     TEXT,
  exit_code       INTEGER,
  stats           TEXT,
  error           TEXT,
  created_at      TEXT NOT NULL,
  source_group_id TEXT REFERENCES source_groups(id) ON DELETE SET NULL
);

INSERT INTO jobs_new
  SELECT id, host_id, kind, status, scheduled_id, actor_kind, actor_id,
         started_at, finished_at, exit_code, stats, error, created_at,
         source_group_id
  FROM jobs;

DROP TABLE jobs;
ALTER TABLE jobs_new RENAME TO jobs;

CREATE INDEX jobs_host_id ON jobs(host_id);
CREATE INDEX jobs_status ON jobs(status);
CREATE INDEX jobs_created_at ON jobs(created_at);
CREATE INDEX jobs_source_group_id ON jobs(source_group_id);

-- Defensive: restore job_logs from the temp backup. INSERT OR IGNORE
-- so a re-run is harmless. Same shape as 0012's safety net.
INSERT OR IGNORE INTO job_logs (job_id, seq, ts, stream, payload)
  SELECT job_id, seq, ts, stream, payload FROM _job_logs_backup;

DROP TABLE _job_logs_backup;