-- Old paginated cursors cannot authorize the single-response discovery contract.
-- Keep task assignments and execution recovery; require a fresh snapshot.
DROP TABLE IF EXISTS local_v01_task_discovery_pages;
DROP TABLE IF EXISTS local_v01_task_discovery_state;

CREATE TABLE IF NOT EXISTS local_v02_task_discovery_state (
    dispatcher_id TEXT PRIMARY KEY,
    cursor TEXT NOT NULL,
    last_mode TEXT NOT NULL CHECK (last_mode IN ('snapshot', 'changes')),
    ready INTEGER NOT NULL CHECK (ready IN (0, 1)),
    updated_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS local_v02_task_discovery_response (
    dispatcher_id TEXT PRIMARY KEY,
    content_sha256 TEXT NOT NULL CHECK (length(content_sha256) = 64),
    body BLOB NOT NULL,
    stored_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS local_v01_task_assignments (
    dispatcher_id TEXT NOT NULL,
    task_id TEXT NOT NULL,
    tenant_id TEXT NOT NULL,
    tenant_key TEXT NOT NULL,
    task_revision INTEGER NOT NULL CHECK (task_revision >= 0),
    saas_status TEXT NOT NULL CHECK (saas_status IN ('running', 'paused', 'stopped', 'finished', 'removed')),
    admission_state TEXT NOT NULL CHECK (admission_state IN ('running', 'paused', 'stopped', 'finished', 'removed')),
    removed INTEGER NOT NULL DEFAULT 0 CHECK (removed IN (0, 1)),
    queue_exchange TEXT NOT NULL,
    routing_key TEXT NOT NULL,
    binding_key TEXT NOT NULL,
    queue_name TEXT NOT NULL,
    updated_at TEXT NOT NULL,
    PRIMARY KEY (dispatcher_id, task_id)
);

CREATE INDEX IF NOT EXISTS local_v01_task_assignments_admission
    ON local_v01_task_assignments(dispatcher_id, removed, admission_state);