/*
 * Tencent is pleased to support the open source community by making TMagicEditor available.
 *
 * Copyright (C) 2023 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { reactive } from 'vue';
import { keys, pick } from 'lodash-es';

import type { ColumnConfig } from '@tmagic/form';
import type { CodeBlockContent, CodeBlockDSL, Id } from '@tmagic/schema';

import type { CodeState } from '@editor/type';
import { CODE_DRAFT_STORAGE_KEY } from '@editor/type';
import { getConfig } from '@editor/utils/config';

import BaseService from './BaseService';

class CodeBlock extends BaseService {
  private state = reactive<CodeState>({
    codeDsl: null,
    editable: true,
    combineIds: [],
    undeletableList: [],
    paramsColConfig: undefined,
  });

  constructor() {
    super([
      { name: 'setCodeDslById', isAsync: true },
      { name: 'setEditStatus', isAsync: true },
      { name: 'setCombineIds', isAsync: true },
      { name: 'setUndeleteableList', isAsync: true },
      { name: 'deleteCodeDslByIds', isAsync: true },
    ]);
  }

  /**
   * 设置活动的代码块dsl数据源
   * @param {CodeBlockDSL} codeDsl 代码DSL
   * @returns {void}
   */
  public async setCodeDsl(codeDsl: CodeBlockDSL): Promise<void> {
    this.state.codeDsl = codeDsl;
    this.emit('code-dsl-change', this.state.codeDsl);
  }

  /**
   * 获取活动的代码块dsl数据源（默认从dsl中的codeBlocks字段读取）
   * 方法要支持钩子添加扩展，会被重写为异步方法,因此这里显示写为异步以提醒调用者需以异步形式调用
   * @param {boolean} forceRefresh 是否强制从活动dsl拉取刷新
   * @returns {CodeBlockDSL | null}
   */
  public getCodeDsl(): CodeBlockDSL | null {
    return this.state.codeDsl;
  }

  /**
   * 根据代码块id获取代码块内容
   * @param {Id} id 代码块id
   * @returns {CodeBlockContent | null}
   */
  public getCodeContentById(id: Id): CodeBlockContent | null {
    if (!id) return null;
    const totalCodeDsl = this.getCodeDsl();
    if (!totalCodeDsl) return null;
    return totalCodeDsl[id] ?? null;
  }

  /**
   * 设置代码块ID和代码内容到源dsl
   * @param {Id} id 代码块id
   * @param {CodeBlockContent} codeConfig 代码块内容配置信息
   * @returns {void}
   */
  public async setCodeDslById(id: Id, codeConfig: Partial<CodeBlockContent>): Promise<void> {
    const codeDsl = this.getCodeDsl();

    if (!codeDsl) {
      throw new Error('dsl中没有codeBlocks');
    }

    const codeConfigProcessed = codeConfig;
    if (codeConfig.content) {
      // 在保存的时候转换代码内容
      const parseDSL = getConfig('parseDSL');
      if (typeof codeConfig.content === 'string') {
        codeConfig.content = parseDSL<(...args: any[]) => any>(codeConfig.content);
      }
      codeConfigProcessed.content = codeConfig.content;
    }

    const existContent = codeDsl[id] || {};

    codeDsl[id] = {
      ...existContent,
      ...codeConfigProcessed,
    };

    this.emit('addOrUpdate', id, codeDsl[id]);
  }

  /**
   * 根据代码块id数组获取代码dsl
   * @param {string[]} ids 代码块id数组
   * @returns {CodeBlockDSL}
   */
  public getCodeDslByIds(ids: string[]): CodeBlockDSL {
    const codeDsl = this.getCodeDsl();
    return pick(codeDsl, ids) as CodeBlockDSL;
  }

  /**
   * 获取编辑状态
   * @returns {boolean} 是否可编辑
   */
  public getEditStatus(): boolean {
    return this.state.editable;
  }

  /**
   * 设置编辑状态
   * @param {boolean} status 是否可编辑
   * @returns {void}
   */
  public async setEditStatus(status: boolean): Promise<void> {
    this.state.editable = status;
  }

  /**
   * 设置当前选中组件已关联绑定的代码块id数组
   * @param {string[]} ids 代码块id数组
   * @returns {void}
   */
  public async setCombineIds(ids: string[]): Promise<void> {
    this.state.combineIds = ids;
  }

  /**
   * 获取当前选中组件已关联绑定的代码块id数组
   * @returns {string[]}
   */
  public getCombineIds(): string[] {
    return this.state.combineIds;
  }

  /**
   * 获取不可删除列表
   * @returns {Id[]}
   */
  public getUndeletableList(): Id[] {
    return this.state.undeletableList;
  }

  /**
   * 设置不可删除列表：为业务逻辑预留的不可删除的代码块列表，由业务逻辑维护（如代码块上线后不可删除）
   * @param {Id[]} codeIds 代码块id数组
   * @returns {void}
   */
  public async setUndeleteableList(codeIds: Id[]): Promise<void> {
    this.state.undeletableList = codeIds;
  }

  /**
   * 设置代码草稿
   */
  public setCodeDraft(codeId: Id, content: string): void {
    globalThis.localStorage.setItem(`${CODE_DRAFT_STORAGE_KEY}_${codeId}`, content);
  }

  /**
   * 获取代码草稿
   */
  public getCodeDraft(codeId: Id): string | null {
    return globalThis.localStorage.getItem(`${CODE_DRAFT_STORAGE_KEY}_${codeId}`);
  }

  /**
   * 删除代码草稿
   */
  public removeCodeDraft(codeId: Id): void {
    globalThis.localStorage.removeItem(`${CODE_DRAFT_STORAGE_KEY}_${codeId}`);
  }

  /**
   * 在dsl数据源中删除指定id的代码块
   * @param {Id[]} codeIds 需要删除的代码块id数组
   */
  public async deleteCodeDslByIds(codeIds: Id[]): Promise<void> {
    const currentDsl = await this.getCodeDsl();

    if (!currentDsl) return;

    codeIds.forEach((id) => {
      delete currentDsl[id];

      this.emit('remove', id);
    });
  }

  public setParamsColConfig(config: ColumnConfig): void {
    this.state.paramsColConfig = config;
  }

  public getParamsColConfig(): ColumnConfig | undefined {
    return this.state.paramsColConfig;
  }

  /**
   * 生成代码块唯一id
   * @returns {Id} 代码块唯一id
   */
  public async getUniqueId(): Promise<string> {
    const newId = `code_${Math.random().toString(10).substring(2).substring(0, 4)}`;
    // 判断是否重复
    const dsl = await this.getCodeDsl();
    const existedIds = keys(dsl);
    if (!existedIds.includes(newId)) return newId;
    return await this.getUniqueId();
  }

  public resetState() {
    this.state.codeDsl = null;
    this.state.editable = true;
    this.state.combineIds = [];
    this.state.undeletableList = [];
  }

  public destroy(): void {
    this.resetState();
    this.removeAllListeners();
    this.removeAllPlugins();
  }
}

export type CodeBlockService = CodeBlock;

export default new CodeBlock();