CREATE TABLE IF NOT EXISTS routes (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  slug TEXT NOT NULL UNIQUE,
  creator_id TEXT,
  name TEXT NOT NULL,
  description TEXT NOT NULL DEFAULT '',
  school_name TEXT NOT NULL DEFAULT '',
  status TEXT NOT NULL DEFAULT 'active' CHECK (status IN ('active', 'deleted')),
  gpx_path TEXT NOT NULL,
  min_lat REAL,
  min_lon REAL,
  max_lat REAL,
  max_lon REAL,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  deleted_at TEXT DEFAULT NULL,
  activated_at TEXT DEFAULT NULL,
  trash_path TEXT
) STRICT;

CREATE TRIGGER IF NOT EXISTS routes_updated_at
AFTER UPDATE ON routes
FOR EACH ROW
WHEN NEW.updated_at IS OLD.updated_at
BEGIN
  UPDATE routes
  SET updated_at = CURRENT_TIMESTAMP
  WHERE id = NEW.id;
END;

CREATE TABLE IF NOT EXISTS pois (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  route_id INTEGER NOT NULL REFERENCES routes(id),
  title TEXT NOT NULL,
  description TEXT NOT NULL DEFAULT '',
  lat REAL,
  lon REAL,
  trigger_radius_m REAL NOT NULL DEFAULT 80,
  sequence INTEGER NOT NULL DEFAULT 0,
  audio_path TEXT,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
) STRICT;

CREATE TABLE IF NOT EXISTS poi_images (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  poi_id INTEGER NOT NULL REFERENCES pois(id),
  path TEXT NOT NULL,
  caption TEXT NOT NULL DEFAULT '',
  sequence INTEGER NOT NULL DEFAULT 0,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
) STRICT;

CREATE TRIGGER IF NOT EXISTS pois_updated_at
AFTER UPDATE ON pois
FOR EACH ROW
WHEN NEW.updated_at IS OLD.updated_at
BEGIN
  UPDATE pois
  SET updated_at = CURRENT_TIMESTAMP
  WHERE id = NEW.id;
END;

CREATE INDEX IF NOT EXISTS idx_routes_status ON routes(status);
CREATE INDEX IF NOT EXISTS idx_routes_activation ON routes(status, activated_at);
CREATE INDEX IF NOT EXISTS idx_pois_route ON pois(route_id, sequence);
CREATE INDEX IF NOT EXISTS idx_poi_images_poi ON poi_images(poi_id, sequence);

CREATE TABLE IF NOT EXISTS collaboration_sessions (
  token_hash TEXT PRIMARY KEY NOT NULL,
  creator_id TEXT NOT NULL,
  expires_at INTEGER NOT NULL
) STRICT;

CREATE TABLE IF NOT EXISTS collaboration_groups (
  id TEXT PRIMARY KEY NOT NULL,
  route_id INTEGER NOT NULL UNIQUE REFERENCES routes(id),
  source_route_id INTEGER REFERENCES routes(id),
  owner_creator_id TEXT NOT NULL,
  code_hash TEXT UNIQUE,
  code_expires_at INTEGER NOT NULL,
  active INTEGER NOT NULL DEFAULT 1 CHECK (active IN (0, 1)),
  revision INTEGER NOT NULL DEFAULT 0,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
) STRICT;

CREATE TABLE IF NOT EXISTS collaboration_members (
  group_id TEXT NOT NULL REFERENCES collaboration_groups(id) ON DELETE CASCADE,
  session_hash TEXT NOT NULL REFERENCES collaboration_sessions(token_hash) ON DELETE CASCADE,
  role TEXT NOT NULL CHECK (role IN ('owner', 'member')),
  PRIMARY KEY (group_id, session_hash)
) STRICT;

CREATE TABLE IF NOT EXISTS collaboration_invitations (
  group_id TEXT PRIMARY KEY NOT NULL REFERENCES collaboration_groups(id) ON DELETE CASCADE,
  code TEXT NOT NULL
) STRICT;