-- Snapshot schedules table for automated snapshot creation
CREATE TABLE IF NOT EXISTS snapshot_schedules (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) NOT NULL,
    dataset VARCHAR(255) NOT NULL,
    snapshot_name_template VARCHAR(255) NOT NULL, -- e.g., "auto-%Y-%m-%d-%H%M" or "daily-backup"
    schedule_type VARCHAR(50) NOT NULL, -- 'hourly', 'daily', 'weekly', 'monthly', 'cron'
    schedule_config JSONB NOT NULL, -- For cron: {"cron": "0 0 * * *"}, for others: {"time": "00:00", "day": 1, etc.}
    recursive BOOLEAN NOT NULL DEFAULT false,
    enabled BOOLEAN NOT NULL DEFAULT true,
    retention_count INTEGER, -- Keep last N snapshots (null = unlimited)
    retention_days INTEGER, -- Keep snapshots for N days (null = unlimited)
    last_run_at TIMESTAMP,
    next_run_at TIMESTAMP,
    created_by UUID REFERENCES users(id),
    created_at TIMESTAMP NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP NOT NULL DEFAULT NOW(),
    UNIQUE(name)
);

CREATE INDEX IF NOT EXISTS idx_snapshot_schedules_enabled ON snapshot_schedules(enabled);
CREATE INDEX IF NOT EXISTS idx_snapshot_schedules_next_run ON snapshot_schedules(next_run_at);
CREATE INDEX IF NOT EXISTS idx_snapshot_schedules_dataset ON snapshot_schedules(dataset);