-- 用户定义的定时任务表
-- 前端 SchedulerPanel 通过此表持久化定时任务配置

CREATE TABLE IF NOT EXISTS scheduled_tasks (
    id TEXT PRIMARY KEY,
    account_id TEXT NOT NULL REFERENCES accounts(id) ON DELETE CASCADE,
    name TEXT NOT NULL,
    description TEXT,
    schedule TEXT NOT NULL,                              -- cron 表达式 / interval / ISO timestamp
    schedule_type TEXT NOT NULL DEFAULT 'cron' CHECK (schedule_type IN ('cron', 'interval', 'once')),
    target_type TEXT NOT NULL CHECK (target_type IN ('agent', 'hand', 'workflow')),
    target_id TEXT NOT NULL,
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    input_payload JSONB,                                 -- 执行时的输入参数
    last_run_at TIMESTAMPTZ,
    next_run_at TIMESTAMPTZ,
    run_count INTEGER NOT NULL DEFAULT 0,
    last_error TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_scheduled_tasks_account ON scheduled_tasks(account_id);
CREATE INDEX IF NOT EXISTS idx_scheduled_tasks_enabled_next ON scheduled_tasks(enabled, next_run_at) WHERE enabled = TRUE;