-- Users
CREATE TABLE IF NOT EXISTS users (
  public_key TEXT PRIMARY KEY,
  inviter TEXT,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Challenges (login nonces)
CREATE TABLE IF NOT EXISTS challenges (
  nonce TEXT PRIMARY KEY,
  public_key TEXT NOT NULL,
  expires_at TIMESTAMPTZ NOT NULL,
  used BOOLEAN NOT NULL DEFAULT FALSE
);

-- Sessions
CREATE TABLE IF NOT EXISTS sessions (
  token TEXT PRIMARY KEY,
  public_key TEXT NOT NULL,
  expires_at TIMESTAMPTZ NOT NULL
);

-- Invitations
CREATE TABLE IF NOT EXISTS invitations (
  jti TEXT PRIMARY KEY,
  inviter_public_key TEXT NOT NULL,
  invitee_public_key TEXT,
  expires_at TIMESTAMPTZ NOT NULL,
  max_uses INT NOT NULL,
  used_count INT NOT NULL DEFAULT 0
);

-- Collections
CREATE TABLE IF NOT EXISTS collections (
  id TEXT PRIMARY KEY,
  owner_key TEXT NOT NULL,
  name TEXT NOT NULL,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Features (geometry and properties as JSONB)
CREATE TABLE IF NOT EXISTS features (
  id TEXT PRIMARY KEY,
  collection_id TEXT NOT NULL REFERENCES collections(id) ON DELETE CASCADE,
  owner_key TEXT NOT NULL,
  type TEXT NOT NULL DEFAULT 'Feature',
  geometry JSONB NOT NULL,
  properties JSONB,
  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_collections_owner ON collections(owner_key);
CREATE INDEX IF NOT EXISTS idx_features_collection ON features(collection_id);
CREATE INDEX IF NOT EXISTS idx_features_owner ON features(owner_key);
CREATE INDEX IF NOT EXISTS idx_challenges_expires ON challenges(expires_at);
CREATE INDEX IF NOT EXISTS idx_sessions_expires ON sessions(expires_at);