CREATE TABLE IF NOT EXISTS router_log_settings (
  id INTEGER PRIMARY KEY CHECK (id = 1), enabled BOOLEAN NOT NULL DEFAULT false,
  interval_sec INTEGER NOT NULL DEFAULT 10 CHECK (interval_sec BETWEEN 5 AND 3600),
  retention_days INTEGER NOT NULL DEFAULT 14 CHECK (retention_days BETWEEN 1 AND 365)
);
INSERT INTO router_log_settings(id) VALUES (1) ON CONFLICT DO NOTHING;
-- No foreign key: collected history survives device deletion.
CREATE TABLE IF NOT EXISTS router_log_collection_state (
  server_id INTEGER PRIMARY KEY, server_name TEXT NOT NULL, host TEXT NOT NULL,
  generation INTEGER NOT NULL DEFAULT 0, snapshot JSONB NOT NULL DEFAULT '[]',
  last_collected_at TIMESTAMPTZ, last_error TEXT, gap_at TIMESTAMPTZ,
  next_poll_at TIMESTAMPTZ, failures INTEGER NOT NULL DEFAULT 0
);
CREATE TABLE IF NOT EXISTS router_log_entries (
  id BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY, server_id INTEGER NOT NULL,
  server_name TEXT NOT NULL, host TEXT NOT NULL, router_id TEXT NOT NULL, raw_time TEXT NOT NULL,
  event_at TIMESTAMPTZ, received_at TIMESTAMPTZ NOT NULL,
  effective_at TIMESTAMPTZ NOT NULL, topics TEXT[] NOT NULL, level TEXT NOT NULL,
  message TEXT NOT NULL, generation INTEGER NOT NULL
);
CREATE INDEX IF NOT EXISTS router_logs_server_time ON router_log_entries(server_id, effective_at DESC, id DESC);
CREATE INDEX IF NOT EXISTS router_logs_time ON router_log_entries(effective_at DESC, id DESC);
CREATE INDEX IF NOT EXISTS router_logs_level_time ON router_log_entries(level, effective_at DESC);
CREATE INDEX IF NOT EXISTS router_logs_topics ON router_log_entries USING gin(topics);
CREATE INDEX IF NOT EXISTS router_logs_received ON router_log_entries(received_at);
CREATE INDEX IF NOT EXISTS router_logs_server_cursor ON router_log_entries(server_id, id);