-- Runtime auth/session tables used by the BFF boundary.
-- This runs during DB initialization so the API can use a non-owner app role.

ALTER TABLE app.app_user
  ADD COLUMN IF NOT EXISTS affiliation TEXT NOT NULL DEFAULT '',
  ADD COLUMN IF NOT EXISTS last_seen_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  ADD COLUMN IF NOT EXISTS updated_at TIMESTAMPTZ NOT NULL DEFAULT now();

ALTER TABLE app.app_user
  ALTER COLUMN affiliation SET DEFAULT '';

CREATE TABLE IF NOT EXISTS app.auth_session (
  sid_hash TEXT PRIMARY KEY,
  user_id UUID NOT NULL REFERENCES app.app_user(user_id) ON DELETE CASCADE,
  role TEXT NOT NULL,
  display_name TEXT NOT NULL,
  cohort_ids JSONB NOT NULL DEFAULT '[]'::jsonb,
  expires_at TIMESTAMPTZ NOT NULL,
  revoked_at TIMESTAMPTZ,
  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
  last_seen_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE INDEX IF NOT EXISTS idx_auth_session_user_active
  ON app.auth_session(user_id, expires_at)
  WHERE revoked_at IS NULL;

CREATE TABLE IF NOT EXISTS app.user_preferences (
  user_id UUID PRIMARY KEY REFERENCES app.app_user(user_id) ON DELETE CASCADE,
  theme TEXT NOT NULL DEFAULT 'system',
  voice_preset_id TEXT NOT NULL DEFAULT 'soft-young-fem',
  voice_rate REAL NOT NULL DEFAULT 1.0,
  notifications JSONB NOT NULL DEFAULT '{}'::jsonb,
  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
);

CREATE TABLE IF NOT EXISTS app.admin_engine_config (
  id BOOLEAN PRIMARY KEY DEFAULT TRUE CHECK (id),
  engine_mode TEXT NOT NULL,
  engine_url TEXT NOT NULL,
  model TEXT NOT NULL,
  updated_by TEXT,
  updated_at TIMESTAMPTZ
);

ALTER TABLE app.sessions
  ADD COLUMN IF NOT EXISTS runtime_case_id UUID,
  ADD COLUMN IF NOT EXISTS persona_code TEXT,
  ADD COLUMN IF NOT EXISTS persona_display_name TEXT,
  ADD COLUMN IF NOT EXISTS persona_difficulty TEXT,
  ADD COLUMN IF NOT EXISTS prev_rapport_credit REAL NOT NULL DEFAULT 0.0;

ALTER TABLE app.session_state
  ADD COLUMN IF NOT EXISTS turns_in_stage INT NOT NULL DEFAULT 0;

INSERT INTO app.stage_def (stage_code, display_name, seq, base_openness)
VALUES
  ('라포', '라포', 1, 0.15),
  ('탐색', '탐색', 2, 0.35),
  ('개입', '개입', 3, 0.55),
  ('정리', '정리', 4, 0.45)
ON CONFLICT (stage_code) DO UPDATE SET
  display_name = EXCLUDED.display_name,
  seq = EXCLUDED.seq,
  base_openness = EXCLUDED.base_openness;

DROP POLICY IF EXISTS p_sessions_modify ON app.sessions;
DROP POLICY IF EXISTS p_sessions_insert ON app.sessions;
DROP POLICY IF EXISTS p_sessions_update ON app.sessions;
DROP POLICY IF EXISTS p_sessions_delete ON app.sessions;
CREATE POLICY p_sessions_insert ON app.sessions FOR INSERT WITH CHECK (
  app.is_ai_context() OR app.current_role_name() IN ('admin','instructor')
  OR learner_id = app.current_uid()
);
CREATE POLICY p_sessions_update ON app.sessions FOR UPDATE USING (
  app.is_ai_context() OR app.current_role_name() IN ('admin','instructor')
  OR learner_id = app.current_uid()
) WITH CHECK (
  app.is_ai_context() OR app.current_role_name() IN ('admin','instructor')
  OR learner_id = app.current_uid()
);
CREATE POLICY p_sessions_delete ON app.sessions FOR DELETE USING (
  app.is_ai_context() OR app.current_role_name() IN ('admin','instructor')
  OR learner_id = app.current_uid()
);

DROP POLICY IF EXISTS p_turns_modify ON app.turns;
DROP POLICY IF EXISTS p_turns_insert ON app.turns;
DROP POLICY IF EXISTS p_turns_update ON app.turns;
DROP POLICY IF EXISTS p_turns_delete ON app.turns;
CREATE POLICY p_turns_insert ON app.turns FOR INSERT WITH CHECK (
  app.is_ai_context()
  OR app.current_role_name() IN ('admin','instructor')
  OR EXISTS (
    SELECT 1 FROM app.sessions s
    WHERE s.id = app.turns.session_id
      AND s.learner_id = app.current_uid()
  )
);
CREATE POLICY p_turns_update ON app.turns FOR UPDATE USING (
  app.is_ai_context()
  OR app.current_role_name() IN ('admin','instructor')
  OR EXISTS (
    SELECT 1 FROM app.sessions s
    WHERE s.id = app.turns.session_id
      AND s.learner_id = app.current_uid()
  )
) WITH CHECK (
  app.is_ai_context()
  OR app.current_role_name() IN ('admin','instructor')
  OR EXISTS (
    SELECT 1 FROM app.sessions s
    WHERE s.id = app.turns.session_id
      AND s.learner_id = app.current_uid()
  )
);
CREATE POLICY p_turns_delete ON app.turns FOR DELETE USING (
  app.is_ai_context()
  OR app.current_role_name() IN ('admin','instructor')
  OR EXISTS (
    SELECT 1 FROM app.sessions s
    WHERE s.id = app.turns.session_id
      AND s.learner_id = app.current_uid()
  )
);