CREATE TABLE IF NOT EXISTS ias_schedules (
    id BIGSERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    schedule_type VARCHAR(32) NOT NULL,
    expression TEXT NOT NULL,
    target_topic TEXT NOT NULL,
    payload JSONB NOT NULL DEFAULT '{}',
    enabled BOOLEAN NOT NULL DEFAULT TRUE,
    last_fired_at TIMESTAMPTZ,
    next_fire_at TIMESTAMPTZ NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT ias_schedules_type_check CHECK (schedule_type IN ('cron', 'interval'))
);

CREATE INDEX IF NOT EXISTS idx_ias_schedules_due
    ON ias_schedules(next_fire_at)
    WHERE enabled = TRUE;

CREATE UNIQUE INDEX IF NOT EXISTS idx_ias_schedules_name_unique
    ON ias_schedules(name);

CREATE TABLE IF NOT EXISTS ias_schedule_fires (
    fire_id TEXT PRIMARY KEY,
    schedule_id BIGINT NOT NULL REFERENCES ias_schedules(id) ON DELETE CASCADE,
    fire_time TIMESTAMPTZ NOT NULL,
    status VARCHAR(32) NOT NULL DEFAULT 'publishing',
    attempt_count INTEGER NOT NULL DEFAULT 0,
    published_at TIMESTAMPTZ,
    error TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_ias_schedule_fires_schedule_time
    ON ias_schedule_fires(schedule_id, fire_time DESC);

CREATE INDEX IF NOT EXISTS idx_ias_schedule_fires_reclaim
    ON ias_schedule_fires(status, updated_at)
    WHERE status IN ('failed', 'publishing');

CREATE TABLE IF NOT EXISTS ias_assistant_turns (
    operation_key TEXT PRIMARY KEY,
    channel TEXT NOT NULL,
    account_id TEXT NOT NULL,
    from_user_id TEXT NOT NULL,
    turn_id TEXT NOT NULL,
    trace_id TEXT NOT NULL DEFAULT '',
    status VARCHAR(32) NOT NULL DEFAULT 'active',
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT ias_assistant_turns_status_check
        CHECK (status IN ('active', 'completed', 'cancelled'))
);

CREATE INDEX IF NOT EXISTS idx_ias_assistant_turns_status_updated
    ON ias_assistant_turns(status, updated_at DESC);