// VaultService — 统筹库管理：默认库、切换、最近库（FR-V）
import nodePath from 'node:path';
import { promises as fs } from 'node:fs';
import { app, dialog } from 'electron';
import { DEFAULT_VAULT_NAME } from '@hunter/shared';
import type { VaultMeta } from '@hunter/shared';
import { ConfigStore } from './config-store.js';
import { FileService } from './file-service.js';
import { SearchService } from './search-service.js';

export class VaultService {
  fileService: FileService | null = null;
  searchService: SearchService | null = null;
  private config: ConfigStore;
  
  constructor() {
    this.config = new ConfigStore(app.getPath('userData'));
  }

  // 启动时初始化：确保有当前库（无则创建默认库）
  async init(): Promise<VaultMeta> {
    let meta = await this.config.getVaultMeta();
    if (!meta.currentRoot) {
      const defaultRoot = nodePath.join(app.getPath('userData'), DEFAULT_VAULT_NAME);
      await fs.mkdir(defaultRoot, { recursive: true });
      meta = await this.config.setCurrentRoot(defaultRoot);
    }
    this.fileService = new FileService(meta.currentRoot);
    this.searchService = new SearchService(meta.currentRoot, this.fileService);
    return meta;
  }

  async getMeta(): Promise<VaultMeta> { return this.config.getVaultMeta(); }

  // 通过系统对话框选择并切换库（FR-V3）
  async pickAndSwitch(): Promise<VaultMeta | null> {
    const result = await dialog.showOpenDialog({ properties: ['openDirectory'] });
    if (result.canceled || result.filePaths.length === 0) return null;
    return this.switch(result.filePaths[0]);
  }

  // 仅浏览选择目录路径，不切换（FR-V5 设置页浏览按钮）
  async pickDirectory(): Promise<string | null> {
    const result = await dialog.showOpenDialog({ properties: ['openDirectory'] });
    if (result.canceled || result.filePaths.length === 0) return null;
    return result.filePaths[0];
  }

  async switch(root: string): Promise<VaultMeta> {
    // 校验是存在的目录
    const stat = await fs.stat(root).catch(() => null);
    if (!stat || !stat.isDirectory()) throw new Error('目标路径不是有效目录: ' + root);
    const meta = await this.config.setCurrentRoot(root);
    this.fileService = new FileService(root);
    this.searchService = new SearchService(root, this.fileService);
    return meta;
  }

  async setDefaultRoot(root: string): Promise<void> { await this.config.setDefaultRoot(root); }
  getAppearance() { return this.config.getAppearance(); }
  saveAppearance(data: { themeId: string; params: Record<string, unknown>; effect: string; bgImage: string | null }) { return this.config.saveAppearance(data); }
  getKeymaps() { return this.config.getKeymaps(); }
  saveKeymaps(data: { id: string; combo: string }[]) { return this.config.saveKeymaps(data); }
}