-- 0011: schema for Seth's changes of 2026-10-26 and 2026-10-28 (docs/PLAN.md, changes C7 and C8). Runs as ps_migrate.

-- ---------------------------------------------------------------- C7: supervisor approval of received shorts

-- Gitea issue 18. The warehouse records a receipt (short_receipts); the department supervisor then approves that
-- receipt, checking the part and its heat number against what the warehouse issued. One approval per receipt.
-- A packet cannot be accepted as complete while a short is open or a receipt has no approval.
CREATE TABLE short_approvals (
    id           bigserial PRIMARY KEY,
    receipt_id   bigint NOT NULL UNIQUE REFERENCES short_receipts (id),
    short_id     bigint NOT NULL REFERENCES bom_shorts (id),
    packet_id    bigint NOT NULL REFERENCES packets (id),
    -- the department the packet was in when the supervisor approved
    dept_code    text NOT NULL REFERENCES departments (code),
    note         text,
    signature_id bigint REFERENCES signatures (id),
    at           timestamptz NOT NULL DEFAULT now(),
    by           uuid NOT NULL REFERENCES users (id)
);
CREATE INDEX short_approvals_packet ON short_approvals (packet_id);

CREATE TRIGGER short_approvals_append_only
    BEFORE UPDATE OR DELETE ON short_approvals
    FOR EACH ROW EXECUTE FUNCTION ps_append_only();
CREATE TRIGGER short_approvals_no_truncate
    BEFORE TRUNCATE ON short_approvals
    FOR EACH STATEMENT EXECUTE FUNCTION ps_append_only();

-- ---------------------------------------------------------------- C8: per-department checklists

-- Gitea issue 23. The checklist a stage uses is frozen when work starts on it. NULL means the stage has not started
-- and reads its department's live template, so a template change reaches packets not yet started only.
ALTER TABLE packet_stages ADD COLUMN checklist_template jsonb;

-- Stages already started before this migration freeze the list they use today (the default for their kind), so a
-- later department edit does not reach them. No department has its own list yet.
UPDATE packet_stages s
   SET checklist_template = t.value -> (CASE WHEN d.weld THEN 'weld' ELSE 'plain' END)
  FROM packets p, departments d, settings t
 WHERE p.id = s.packet_id AND d.code = s.dept_code AND t.key = 'checklist_templates'
   AND s.closed_at IS NULL AND p.status IN ('in_progress', 'review', 'qc')
   AND jsonb_typeof(t.value -> (CASE WHEN d.weld THEN 'weld' ELSE 'plain' END)) = 'array';

-- Explicit, after the default privileges: the app may only read and append the approvals.
REVOKE UPDATE, DELETE, TRUNCATE ON short_approvals FROM ps_app;
GRANT SELECT, INSERT ON short_approvals TO ps_app;
GRANT USAGE, SELECT ON ALL SEQUENCES IN SCHEMA public TO ps_app;