import { CLASS_DEFINE_CHUNK_NAME, COMMON_CHUNK_NAME } from '../../../const/generator';

import {
  BuilderComponentPlugin,
  BuilderComponentPluginFactory,
  ChunkType,
  FileType,
  ICodeStruct,
} from '../../../types';
import { RAX_CHUNK_NAME } from './const';

type PluginConfig = {
  fileType: string;
};

const pluginFactory: BuilderComponentPluginFactory<PluginConfig> = (config?) => {
  const cfg: PluginConfig = {
    fileType: FileType.JSX,
    ...config,
  };

  const plugin: BuilderComponentPlugin = async (pre: ICodeStruct) => {
    const next: ICodeStruct = {
      ...pre,
    };

    next.chunks.push({
      type: ChunkType.STRING,
      fileType: cfg.fileType,
      name: COMMON_CHUNK_NAME.InternalDepsImport,
      // TODO: 下面这个路径有没有更好的方式来获取？而非写死
      content: `
        import __$$projectUtils from '../../utils';
      `,
      linkAfter: [COMMON_CHUNK_NAME.ExternalDepsImport],
    });

    next.chunks.push({
      type: ChunkType.STRING,
      fileType: cfg.fileType,
      name: CLASS_DEFINE_CHUNK_NAME.InsVar,
      content: '_utils = this._defineUtils();',
      linkAfter: [CLASS_DEFINE_CHUNK_NAME.Start],
    });

    next.chunks.push({
      type: ChunkType.STRING,
      fileType: cfg.fileType,
      name: CLASS_DEFINE_CHUNK_NAME.InsPrivateMethod,

      // 绑定下上下文，这样在所有的 utils 里面都能通过 this.xxx 来访问上下文了
      content: `
        _defineUtils() {
          const utils = {
            ...__$$projectUtils,
          };

          Object.entries(utils).forEach(([name, util]) => {
            if (typeof util === 'function') {
              utils[name] = util.bind(this._context);
            }
          });

          return utils;
        }`,
      linkAfter: [RAX_CHUNK_NAME.ClassRenderEnd],
    });

    return next;
  };
  return plugin;
};

export default pluginFactory;