-- broker.broker_job_dependency
-- Replaces the old broker_jobs.depends_on text[] column: job_id is only
-- claimable once every row it depends on has complete_status = 2 (completed).

CREATE TABLE IF NOT EXISTS broker.broker_job_dependency (
    job_id BIGINT NOT NULL REFERENCES broker.broker_jobs(id_broker_jobs) ON DELETE CASCADE,
    depends_on_job_id BIGINT NOT NULL REFERENCES broker.broker_jobs(id_broker_jobs) ON DELETE CASCADE,
    tenant_id TEXT NOT NULL DEFAULT 'default',
    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
    PRIMARY KEY (job_id, depends_on_job_id),
    CHECK (job_id <> depends_on_job_id)
);

CREATE INDEX IF NOT EXISTS idx_broker_job_dependency_reverse
    ON broker.broker_job_dependency (depends_on_job_id, job_id);
CREATE INDEX IF NOT EXISTS idx_broker_job_dependency_tenant
    ON broker.broker_job_dependency (tenant_id);

COMMENT ON TABLE broker.broker_job_dependency IS 'job_id is not claimable until every depends_on_job_id row has complete_status = 2 (completed)';

ALTER TABLE broker.broker_job_dependency ENABLE ROW LEVEL SECURITY;
ALTER TABLE broker.broker_job_dependency FORCE ROW LEVEL SECURITY;

DROP POLICY IF EXISTS broker_job_dependency_tenant_isolation ON broker.broker_job_dependency;
CREATE POLICY broker_job_dependency_tenant_isolation ON broker.broker_job_dependency
    USING (tenant_id = COALESCE(NULLIF(current_setting('broker.tenant_id', true), ''), 'default'))
    WITH CHECK (tenant_id = COALESCE(NULLIF(current_setting('broker.tenant_id', true), ''), 'default'));