import path from 'node:path';
import fs from 'node:fs';
import { Config, SyncList, SyncConfigType, SyncConfig } from './type.ts';
import { fileIsExist } from '@/uitls/file.ts';
import { getHash } from '@/uitls/hash.ts';
import glob from 'fast-glob';
import { logger } from '@/module/logger.ts';

export type SyncOptions = {
  dir?: string;
  configFilename?: string;
  baseURL?: string;
};
export class SyncBase {
  config: Config;
  #filename: string;
  #dir: string;
  baseURL: string;
  constructor(opts?: SyncOptions) {
    const filename = opts?.configFilename || 'kevisual.json';
    const dir = opts?.dir || process.cwd();
    this.#filename = filename;
    this.#dir = path.resolve(dir);
    this.baseURL = opts?.baseURL ?? '';
    this.init();
  }
  async init() {
    try {
      const dir = this.#dir;
      const filename = this.#filename;
      const filepath = path.join(dir, filename);
      if (!fileIsExist(filepath)) throw new Error('config file not found');
      const config = JSON.parse(fs.readFileSync(filepath, 'utf-8'));
      const sync = config.sync || {};
      const keys = Object.keys(sync);
      const newConfigSync: any = {};
      for (let key of keys) {
        const keyPath = path.join(dir, key);
        const newKey = path.relative(dir, keyPath);
        newConfigSync[newKey] = sync[key];
      }
      config.sync = newConfigSync;
      this.config = config;
      return config;
    } catch (err) {
      this.config = {} as Config;
      return {} as Config;
    }
  }
  async canDone(syncType: SyncConfigType, type?: SyncConfigType) {
    if (syncType === 'sync') return true;
    return syncType === type;
  }
  /**
   *
   * @param opts
   * @param opts.getFile 是否检测文件是否存在
   * @returns
   */
  async getSyncList(opts?: { getFile?: boolean }): Promise<SyncList[]> {
    const config = this.config!;
    let sync = config?.sync || {};
    const syncDirectory = await this.getSyncDirectoryList();
    sync = this.getMergeSync(sync, syncDirectory.sync);
    const syncKeys = Object.keys(sync);
    const baseURL = this.baseURL;
    const syncList = syncKeys.map((key) => {
      const value = sync[key];
      const filepath = path.join(this.#dir, key); // 文件的路径

      const checkAuth = (value: string = '', baseURL: string = '') => {
        if (value.startsWith(baseURL)) {
          return true;
        }
        return false;
      };
      if (typeof value === 'string') {
        const auth = checkAuth(value, baseURL);
        const type = auth ? 'sync' : 'none';
        return {
          key,
          type: type as any,
          filepath,
          url: value,
          auth,
        };
      }
      const auth = checkAuth(value.url, baseURL);
      const type = auth ? 'sync' : 'none';
      return {
        key,
        filepath,
        ...value,
        type: value?.type ?? type,
        auth: checkAuth(value.url, baseURL),
      };
    });
    if (opts?.getFile) {
      return this.getSyncListFile(syncList);
    }
    return syncList;
  }
  getMergeSync(sync: Config['sync'] = {}, fileSync: Config['sync'] = {}) {
    const syncFileSyncKeys = Object.keys(fileSync);
    const syncKeys = Object.keys(sync);
    const keys = [...syncKeys, ...syncFileSyncKeys];
    const obj: Config['sync'] = {};
    for (let key of keys) {
      const value = sync[key] ?? fileSync[key];
      obj[key] = value;
    }
    return obj;
  }
  async getSyncDirectoryList() {
    const config = this.config;
    const syncDirectory = config?.syncDirectory || [];
    let obj: Record<string, string> = {};
    const keys: string[] = [];
    for (let item of syncDirectory) {
      const { registry, ignore = [], files = [], replace = {} } = item;
      const cwd = this.#dir;
      const glob_files = await glob(files, {
        ignore,
        onlyFiles: true,
        cwd,
        dot: true,
        absolute: true,
      });
      const registyURL = registry || config.registry;
      if (!registyURL) {
        logger.error('请配置 registry', item);
        continue;
      }
      for (let file of glob_files) {
        const key = path.relative(cwd, file);
        const _registryURL = new URL(registyURL);
        const replaceKeys = Object.keys(replace);
        let newKey = key;
        for (let replaceKey of replaceKeys) {
          if (newKey.startsWith(replaceKey)) {
            newKey = key.replace(replaceKey, replace[replaceKey]);
          }
        }
        const pathname = path.join(_registryURL.pathname, newKey);
        _registryURL.pathname = pathname;
        keys.push(key);
        obj[key] = _registryURL.toString();
      }
    }
    return { sync: obj, keys };
  }
  /**
   * 获取文件列表，检测文件是否存在
   * @param syncList
   * @returns
   */
  async getSyncListFile(syncList: SyncList[]) {
    let syncListFile: SyncList[] = [];
    for (let item of syncList) {
      const { filepath, auth } = item;
      if (filepath && fileIsExist(filepath) && auth) {
        syncListFile.push({
          ...item,
          exist: true,
          hash: getHash(filepath),
        });
      } else {
        syncListFile.push({ ...item, exist: false });
      }
    }
    return syncListFile;
  }
  getHash = getHash;
  async getDir(filepath: string, check = false) {
    const dir = path.dirname(filepath);
    if (check) {
      if (!fileIsExist(dir)) {
        fs.mkdirSync(dir, { recursive: true });
      }
    }
    return dir;
  }
  async download() {
    // const syncList = await this.getSyncList();
    // for (const item of syncList) {
    // }
  }
  async upload() {
    // need check permission
  }
}