const vscode = require("vscode");
const axios = require("axios");
const qs = require("qs");

async function youdaoTranslate(text) {
  var args = {
    keyfrom: "YouDaoCV",
    key: "659600698",
    type: "data",
    doctype: "json",
    version: "1.1",
    q: text,
  };

  return new Promise((resolve, reject) => {
    var url = "http://fanyi.youdao.com/openapi.do";
    axios
      .post(url, qs.stringify(args), {})
      .then((res) => {
        try {
          resolve(res.data.translation[0]);
        } catch (error) {
          resolve("单词未找到释义");
        }
      })
      .catch((err) => {
        console.log(err);
        reject(err.data);
      });
  });
}

//缓存
let Cache = [];
let translate = "";
/**
 * @param {vscode.ExtensionContext} context
 */
function activate(context) {
  console.log('Congratulations, your extension "ztrans" is now active!');
  let disposable = vscode.commands.registerCommand(
    "ztrans.translate",
    async () => {
      const { activeTextEditor } = vscode.window; //获取当前聚焦的文本编辑器
      const currentSelect = activeTextEditor.document.getText(
        activeTextEditor.selection
      ); //根据范围选取文本
      let result = await youdaoTranslate(currentSelect);
      //转换驼峰
      result = result
        .split(" ")
        .map((v, i) => {
          return i !== 0
            ? v.charAt(0).toLocaleUpperCase() + v.slice(1).toLocaleLowerCase()
            : v.toLocaleLowerCase();
        })
        .join("")
        .replace(/[.,;':]/g, "");
      activeTextEditor.edit((editBuilder) => {
        editBuilder.replace(activeTextEditor.selection, result); //将翻译内容替换
      });
    }
  );
  //悬浮翻译
  vscode.languages.registerHoverProvider("*", {
    provideHover: async (document, position) => {
      const word = document.getText(document.getWordRangeAtPosition(position)); //获取悬浮区域文本
      if (word in Cache) {
        translate = Cache[word]; //读取缓存的翻译
      } else {
        translate = await youdaoTranslate(word);
        Cache[word] = "[cache] " + translate;
      }
      return new vscode.Hover("中文翻译： " + translate);
    },
  });
  context.subscriptions.push(disposable);
}

// this method is called when your extension is deactivated
function deactivate() {}

module.exports = {
  activate,
  deactivate,
};