// ==UserScript==
// @name         Duolingo: Type more, tap less
// @description  Replace tapping exercises with full-sentence typing
// @namespace    neobrain
// @author       neobrain
// @match        https://*.duolingo.com/*
// @grant        GM.XMLHTTPRequest
// @grant        GM.log
// @run-at       document-start
// @require      https://update.greasyfork.org/scripts/472943.js?version=1239323
// @license      MIT
// @version      0.3
// @downloadURL none
// ==/UserScript==

middleMan.addHook("*/sessions", {
    requestHandler(request) {
      GM.log("Outgoing request: ", request);
    },
    async responseHandler(request, response, error) {
        GM.log("Incoming response: ", response, error);

        let learningLanguage = JSON.parse(localStorage.getItem("duo.state")).state.redux.user.learningLanguage;
        let fromLanguage = JSON.parse(localStorage.getItem("duo.state")).state.redux.user.fromLanguage;

        const data = await response?.json() ?? { errorMessage: error.message };
        for (let challenge of data.challenges) {
            // Speak exercises always use tapping. Turn this into a translate exercise instead
            // Disabled for now since translate exercises won't have voice output :(
            if (false && challenge.type === "speak") {
              challenge.type = "translate";

              challenge.correctSolutions = [ challenge.solutionTranslation ];
              delete challenge.solutionTranslation;

              challenge.targetLanguage = challenge.grader.langage;
              challenge.sourceLanguage = challenge.grader.langage === learningLanguage ? fromLanguage : learningLanguage;
            }

            // Translate exercises use tapping only when translating to the student language.
            // Trick the frontend into allowing free-form text by swapping the languages
            if (challenge.type === "translate" && challenge.grader.language == fromLanguage) {
                challenge.grader.language = learningLanguage;
                challenge.sourceLanguage = fromLanguage;
                // NOTE: The frontend uses challenge.targetLanguage for the "Write this in X" text, so we leave it unchanged
            }
        }
        return Response.json(data);
    }
});