-- Ops-B analytics (ECR-007)

CREATE TABLE IF NOT EXISTS analytics_sessions (
  session_id varchar(64) PRIMARY KEY,
  device_key varchar(128) NOT NULL,
  user_id uuid NULL REFERENCES users(id),
  started_at timestamptz NOT NULL DEFAULT now(),
  ended_at timestamptz NULL,
  exit_page text NULL,
  duration_ms int NULL
);
CREATE INDEX IF NOT EXISTS idx_analytics_sessions_started ON analytics_sessions(started_at DESC);
CREATE INDEX IF NOT EXISTS idx_analytics_sessions_user ON analytics_sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_analytics_sessions_device ON analytics_sessions(device_key);

CREATE TABLE IF NOT EXISTS analytics_events (
  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
  session_id varchar(64) NOT NULL REFERENCES analytics_sessions(session_id),
  user_id uuid NULL REFERENCES users(id),
  name varchar(64) NOT NULL,
  page_path text NULL,
  props jsonb NOT NULL DEFAULT '{}',
  client_ts timestamptz NOT NULL,
  received_at timestamptz NOT NULL DEFAULT now()
);
CREATE INDEX IF NOT EXISTS idx_analytics_events_received ON analytics_events(received_at DESC);
CREATE INDEX IF NOT EXISTS idx_analytics_events_name_day ON analytics_events(name, ((received_at AT TIME ZONE 'UTC')::date));
CREATE INDEX IF NOT EXISTS idx_analytics_events_page ON analytics_events(page_path) WHERE page_path IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_analytics_events_session ON analytics_events(session_id);