-- schema version tracked in app_meta

CREATE TABLE IF NOT EXISTS app_meta (
  key   TEXT PRIMARY KEY,
  value TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS users (
  id            TEXT PRIMARY KEY,
  username      TEXT NOT NULL UNIQUE COLLATE NOCASE,
  password_hash TEXT NOT NULL,
  is_admin      INTEGER NOT NULL DEFAULT 0,
  created_at    TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS sessions (
  id         TEXT PRIMARY KEY,
  user_id    TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  token_hash TEXT NOT NULL UNIQUE,
  expires_at TEXT NOT NULL,
  created_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_sessions_token ON sessions(token_hash);
CREATE INDEX IF NOT EXISTS idx_sessions_user ON sessions(user_id);

CREATE TABLE IF NOT EXISTS projects (
  id         TEXT PRIMARY KEY,
  name       TEXT NOT NULL,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS project_members (
  project_id TEXT NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
  user_id    TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  role       TEXT NOT NULL,
  PRIMARY KEY (project_id, user_id)
);

CREATE INDEX IF NOT EXISTS idx_members_user ON project_members(user_id);

CREATE TABLE IF NOT EXISTS tickets (
  id           TEXT PRIMARY KEY,
  title        TEXT NOT NULL,
  description  TEXT NOT NULL DEFAULT '',
  status       TEXT NOT NULL,
  project_id   TEXT NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
  created_at   TEXT NOT NULL,
  updated_at   TEXT NOT NULL,
  source       TEXT NOT NULL DEFAULT '',
  external_id  TEXT NOT NULL DEFAULT '',
  external_url TEXT NOT NULL DEFAULT '',
  synced_at    TEXT NOT NULL DEFAULT ''
);

CREATE INDEX IF NOT EXISTS idx_tickets_project ON tickets(project_id);
CREATE INDEX IF NOT EXISTS idx_tickets_external ON tickets(external_id);

CREATE TABLE IF NOT EXISTS time_entries (
  id          TEXT PRIMARY KEY,
  ticket_id   TEXT NOT NULL,
  project_id  TEXT NOT NULL,
  start       TEXT NOT NULL,
  end         TEXT NOT NULL,
  duration_ns INTEGER NOT NULL,
  source      TEXT NOT NULL DEFAULT '',
  note        TEXT NOT NULL DEFAULT '',
  external_id TEXT NOT NULL DEFAULT ''
);

CREATE INDEX IF NOT EXISTS idx_time_ticket ON time_entries(ticket_id);
CREATE INDEX IF NOT EXISTS idx_time_project ON time_entries(project_id);

CREATE TABLE IF NOT EXISTS active_timer (
  id         INTEGER PRIMARY KEY CHECK (id = 1),
  ticket_id  TEXT NOT NULL,
  project_id TEXT NOT NULL,
  started_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS connections (
  id              TEXT PRIMARY KEY,
  name            TEXT NOT NULL,
  kind            TEXT NOT NULL,
  base_url        TEXT NOT NULL,
  scope           TEXT NOT NULL,
  encrypted_token BLOB NOT NULL,
  created_by      TEXT REFERENCES users(id) ON DELETE SET NULL,
  created_at      TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS sync_backends (
  project_id    TEXT PRIMARY KEY REFERENCES projects(id) ON DELETE CASCADE,
  kind          TEXT NOT NULL DEFAULT 'none',
  base_url      TEXT NOT NULL DEFAULT '',
  project_key   TEXT NOT NULL DEFAULT '',
  query         TEXT NOT NULL DEFAULT '',
  connection_id TEXT REFERENCES connections(id) ON DELETE SET NULL
);

CREATE TABLE IF NOT EXISTS revisions (
  id            INTEGER PRIMARY KEY AUTOINCREMENT,
  entity_type   TEXT NOT NULL,
  entity_id     TEXT NOT NULL,
  project_id    TEXT NOT NULL DEFAULT '',
  rev           INTEGER NOT NULL,
  at            TEXT NOT NULL,
  actor_user_id TEXT,
  op            TEXT NOT NULL,
  snapshot_json TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_revisions_entity ON revisions(entity_type, entity_id);
CREATE INDEX IF NOT EXISTS idx_revisions_project ON revisions(project_id);