CREATE TABLE IF NOT EXISTS routes (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  slug TEXT NOT NULL UNIQUE,
  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,
  start_lat REAL,
  start_lon REAL,
  center_lat REAL,
  center_lon REAL,
  min_lat REAL,
  min_lon REAL,
  max_lat REAL,
  max_lon REAL,
  distance_m REAL NOT NULL DEFAULT 0,
  elevation_gain_m REAL NOT NULL DEFAULT 0,
  point_count INTEGER NOT NULL DEFAULT 0,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  deleted_at TEXT,
  trash_path TEXT
) STRICT;

CREATE TABLE IF NOT EXISTS route_points (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  route_id INTEGER NOT NULL REFERENCES routes(id),
  sequence INTEGER NOT NULL,
  lat REAL NOT NULL,
  lon REAL NOT NULL,
  elevation REAL,
  recorded_at TEXT,
  UNIQUE(route_id, sequence)
) STRICT;

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 NOT NULL,
  lon REAL NOT NULL,
  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 INDEX IF NOT EXISTS idx_routes_status ON routes(status);
CREATE INDEX IF NOT EXISTS idx_route_points_route ON route_points(route_id, sequence);
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);