CREATE TABLE IF NOT EXISTS tasks (
    id TEXT PRIMARY KEY NOT NULL,
    name TEXT NOT NULL,
    cron TEXT NOT NULL,
    timezone TEXT NOT NULL,
    enabled INTEGER NOT NULL CHECK (enabled IN (0, 1)),
    timeout_secs INTEGER NOT NULL CHECK (timeout_secs > 0),
    concurrency_policy TEXT NOT NULL DEFAULT 'skip'
        CHECK (concurrency_policy = 'skip'),
    retry_max_attempts INTEGER NOT NULL DEFAULT 0
        CHECK (retry_max_attempts >= 0),
    retry_delay_secs INTEGER NOT NULL DEFAULT 0
        CHECK (retry_delay_secs >= 0),
    action_type TEXT NOT NULL
        CHECK (action_type IN ('script', 'http', 'process')),
    action_json TEXT NOT NULL,
    created_at TEXT NOT NULL,
    updated_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_tasks_updated_at
    ON tasks(updated_at DESC);

CREATE INDEX IF NOT EXISTS idx_tasks_enabled
    ON tasks(enabled);

CREATE INDEX IF NOT EXISTS idx_tasks_action_type
    ON tasks(action_type);