-- 001-initial-schema.sql
-- MNote control-plane v1 schema
--
-- All tables use TEXT for datetime columns (ISO-8601) so the database
-- remains readable without language-specific timestamp types.

CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  email TEXT UNIQUE,
  username TEXT UNIQUE NOT NULL,
  display_name TEXT NOT NULL,
  role TEXT NOT NULL DEFAULT 'user',
  status TEXT NOT NULL DEFAULT 'active',
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1
);

CREATE TABLE IF NOT EXISTS auth_identities (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  provider TEXT NOT NULL,
  provider_subject TEXT NOT NULL,
  password_hash TEXT,
  password_version INTEGER NOT NULL DEFAULT 1,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  UNIQUE(provider, provider_subject)
);

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

CREATE INDEX IF NOT EXISTS idx_auth_sessions_user ON auth_sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_auth_sessions_token ON auth_sessions(token_hash);

CREATE TABLE IF NOT EXISTS workspaces (
  id TEXT PRIMARY KEY,
  owner_user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  name TEXT NOT NULL,
  kind TEXT NOT NULL DEFAULT 'personal',
  root_uri TEXT NOT NULL UNIQUE,
  root_path TEXT NOT NULL,
  source_kind TEXT NOT NULL DEFAULT 'local_folder',
  status TEXT NOT NULL DEFAULT 'active',
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1
);

CREATE INDEX IF NOT EXISTS idx_workspaces_owner ON workspaces(owner_user_id);

CREATE TABLE IF NOT EXISTS workspace_members (
  id TEXT PRIMARY KEY,
  workspace_id TEXT NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
  user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  role TEXT NOT NULL,
  status TEXT NOT NULL DEFAULT 'active',
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1,
  UNIQUE(workspace_id, user_id)
);

CREATE TABLE IF NOT EXISTS directory_grants (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  workspace_id TEXT REFERENCES workspaces(id) ON DELETE SET NULL,
  root_uri TEXT NOT NULL,
  root_path TEXT NOT NULL,
  permission TEXT NOT NULL,
  recursive INTEGER NOT NULL DEFAULT 1,
  capabilities_json TEXT NOT NULL DEFAULT '[]',
  source TEXT NOT NULL DEFAULT 'admin',
  status TEXT NOT NULL DEFAULT 'active',
  created_by TEXT REFERENCES users(id),
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1
);

CREATE INDEX IF NOT EXISTS idx_directory_grants_user ON directory_grants(user_id);
CREATE INDEX IF NOT EXISTS idx_directory_grants_root_uri ON directory_grants(root_uri);

CREATE TABLE IF NOT EXISTS share_links (
  id TEXT PRIMARY KEY,
  workspace_id TEXT NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
  resource_kind TEXT NOT NULL,
  resource_id TEXT NOT NULL,
  token_hash TEXT NOT NULL UNIQUE,
  permission TEXT NOT NULL,
  created_by TEXT NOT NULL REFERENCES users(id),
  expires_at TEXT,
  revoked_at TEXT,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1
);

CREATE INDEX IF NOT EXISTS idx_share_links_resource ON share_links(workspace_id, resource_kind, resource_id);

CREATE TABLE IF NOT EXISTS sync_state (
  id TEXT PRIMARY KEY,
  workspace_id TEXT NOT NULL REFERENCES workspaces(id) ON DELETE CASCADE,
  remote_kind TEXT NOT NULL,
  remote_id TEXT,
  cursor TEXT,
  last_synced_at TEXT,
  status TEXT NOT NULL DEFAULT 'idle',
  error_json TEXT,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1,
  UNIQUE(workspace_id, remote_kind)
);

CREATE TABLE IF NOT EXISTS ai_policies (
  id TEXT PRIMARY KEY,
  user_id TEXT REFERENCES users(id) ON DELETE CASCADE,
  workspace_id TEXT REFERENCES workspaces(id) ON DELETE CASCADE,
  allowed_roots_json TEXT NOT NULL DEFAULT '[]',
  model_policy_json TEXT NOT NULL DEFAULT '{}',
  quota_json TEXT NOT NULL DEFAULT '{}',
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1
);

CREATE TABLE IF NOT EXISTS audit_log (
  id TEXT PRIMARY KEY,
  actor_user_id TEXT REFERENCES users(id),
  action TEXT NOT NULL,
  target_kind TEXT NOT NULL,
  target_id TEXT,
  metadata_json TEXT NOT NULL DEFAULT '{}',
  created_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_audit_actor ON audit_log(actor_user_id, created_at);
CREATE INDEX IF NOT EXISTS idx_audit_target ON audit_log(target_kind, target_id, created_at);

CREATE TABLE IF NOT EXISTS outbox_events (
  id TEXT PRIMARY KEY,
  topic TEXT NOT NULL,
  event_type TEXT NOT NULL,
  payload_json TEXT NOT NULL,
  created_at TEXT NOT NULL,
  delivered_at TEXT,
  attempts INTEGER NOT NULL DEFAULT 0
);

CREATE INDEX IF NOT EXISTS idx_outbox_pending ON outbox_events(delivered_at, created_at);

CREATE TABLE IF NOT EXISTS legacy_id_map (
  id TEXT PRIMARY KEY,
  legacy_system TEXT NOT NULL,
  legacy_kind TEXT NOT NULL,
  legacy_id TEXT NOT NULL,
  new_kind TEXT NOT NULL,
  new_id TEXT NOT NULL,
  metadata_json TEXT NOT NULL DEFAULT '{}',
  created_at TEXT NOT NULL,
  UNIQUE(legacy_system, legacy_kind, legacy_id)
);