/**
 * Database Interface – abstract DB layer for Web CAD
 */

export interface DBProject {
  id: string;
  name: string;
  description: string | null;
  owner_id: string;
  folder_id: string | null;
  created_at: string;
  updated_at: string;
}

export interface DBProjectFolder {
  id: string;
  name: string;
  parent_id: string | null;
  owner_id: string;
  created_at: string;
}

export interface DBDrawing {
  id: string;
  project_id: string;
  name: string;
  data_json: string;
  created_at: string;
  updated_at: string;
}

export interface DBLayer {
  id: string;
  drawing_id: string;
  name: string;
  visible: number;
  locked: number;
  color: string;
  line_type: string;
  transparency: number;
  sort_order: number;
  parent_id: string | null;
}

export interface DBElement {
  id: string;
  drawing_id: string;
  layer_id: string;
  type: string;
  x: number;
  y: number;
  width: number;
  height: number;
  properties_json: string;
  created_at: string;
}

export interface DBBlock {
  id: string;
  drawing_id: string;
  name: string;
  description: string | null;
  category: string;
  elements_json: string;
  thumbnail: string | null;
}

export interface DBSetting {
  key: string;
  value: string;
  updated_at: string;
}

export interface DBUser {
  id: string;
  email: string;
  password_hash: string;
  name: string;
  role: string;
  created_at: string;
  updated_at: string;
}

export interface DBSession {
  token: string;
  user_id: string;
  expires_at: number;
  created_at: string;
}

export interface DBNotification {
  id: string;
  user_id: string;
  type: string;
  title: string;
  message: string;
  read: number;
  created_at: string;
}

export interface DBProjectShare {
  id: string;
  project_id: string;
  shared_with_email: string;
  shared_by: string;
  permission: string;
  share_token: string | null;
  created_at: string;
}

export interface DBGlobalBlockFolder {
  id: string;
  name: string;
  parent_id: string | null;
  created_at: string;
}

export interface DBGlobalBlock {
  id: string;
  folder_id: string | null;
  name: string;
  block_data: string;
  svg_data: string | null;
  is_favorite: boolean;
  created_at: string;
  updated_at: string;
}

export interface DatabaseInterface {
  init(): Promise<void>;
  close(): void;

  // Users
  getUser(id: string): DBUser | null;
  getUserByEmail(email: string): DBUser | null;
  createUser(data: Partial<DBUser>): DBUser;
  updateUser(id: string, data: Partial<DBUser>): DBUser | null;
  deleteUser(id: string): boolean;
  listUsers(): DBUser[];

  // Projects
  listProjects(ownerId?: string, folderId?: string | null): DBProject[];
  getProject(id: string): DBProject | null;
  createProject(data: Partial<DBProject>): DBProject;
  updateProject(id: string, data: Partial<DBProject>): DBProject | null;
  deleteProject(id: string): boolean;
  moveProjectToFolder(projectId: string, folderId: string | null): DBProject | null;

  // Project Folders
  listProjectFolders(ownerId: string): DBProjectFolder[];
  getProjectFolder(id: string): DBProjectFolder | null;
  createProjectFolder(data: Partial<DBProjectFolder>): DBProjectFolder;
  updateProjectFolder(id: string, data: Partial<DBProjectFolder>): DBProjectFolder | null;
  deleteProjectFolder(id: string): boolean;

  // Drawings
  listDrawings(projectId: string): DBDrawing[];
  getDrawing(id: string): DBDrawing | null;
  createDrawing(data: Partial<DBDrawing>): DBDrawing;
  updateDrawing(id: string, data: Partial<DBDrawing>): DBDrawing | null;
  deleteDrawing(id: string): boolean;

  // Layers
  listLayers(drawingId: string): DBLayer[];
  createLayer(data: Partial<DBLayer>): DBLayer;
  updateLayer(id: string, data: Partial<DBLayer>): DBLayer | null;
  deleteLayer(id: string): boolean;

  // Elements
  listElements(drawingId: string): DBElement[];
  createElement(data: Partial<DBElement>): DBElement;
  updateElement(id: string, data: Partial<DBElement>): DBElement | null;
  deleteElement(id: string): boolean;

  // Blocks
  listBlocks(drawingId: string): DBBlock[];
  createBlock(data: Partial<DBBlock>): DBBlock;
  updateBlock(id: string, data: Partial<DBBlock>): DBBlock | null;
  deleteBlock(id: string): boolean;

  // Settings
  getSetting(key: string): DBSetting | null;
  setSetting(key: string, value: string): void;

  // Sessions
  createSession(data: Partial<DBSession>): DBSession;
  getSession(token: string): DBSession | null;
  deleteSession(token: string): boolean;
  deleteExpiredSessions(): void;

  // Notifications
  listNotifications(userId: string): DBNotification[];
  getNotification(id: string): DBNotification | null;
  createNotification(data: Partial<DBNotification>): DBNotification;
  markNotificationRead(id: string): boolean;
  deleteNotification(id: string): boolean;

  // Project Shares
  listProjectShares(projectId: string): DBProjectShare[];
  getProjectShare(id: string): DBProjectShare | null;
  createProjectShare(data: Partial<DBProjectShare>): DBProjectShare;
  deleteProjectShare(id: string): boolean;

  // Global Block Folders
  listGlobalFolders(parentId?: string | null): DBGlobalBlockFolder[];
  getGlobalFolder(id: string): DBGlobalBlockFolder | null;
  createGlobalFolder(data: Partial<DBGlobalBlockFolder>): DBGlobalBlockFolder;
  updateGlobalFolder(id: string, data: Partial<DBGlobalBlockFolder>): DBGlobalBlockFolder | null;
  deleteGlobalFolder(id: string): boolean;

  // Global Blocks
  listGlobalBlocks(folderId?: string | null): DBGlobalBlock[];
  getGlobalBlock(id: string): DBGlobalBlock | null;
  createGlobalBlock(data: Partial<DBGlobalBlock>): DBGlobalBlock;
  updateGlobalBlock(id: string, data: Partial<DBGlobalBlock>): DBGlobalBlock | null;
  deleteGlobalBlock(id: string): boolean;

  // Guests (Task E6)
  listGuests(drawingId: string): DBGuest[];
  getGuest(id: string): DBGuest | null;
  createGuest(data: Partial<DBGuest>): DBGuest;
  updateGuest(id: string, data: Partial<DBGuest>): DBGuest | null;
  deleteGuest(id: string): boolean;
}

// ─── Guests (Task E6) ──────────────────────────────────
export interface DBGuest {
  id: string;
  drawing_id: string;
  name: string;
  email?: string;
  category: string; // 'standard' | 'vip' | 'staff'
  seat_element_id?: string;  // Verknüpfung zu einem chair-Element
  notes?: string;
  created_at: string;
}