// ==UserScript==
// @name         Bilibili 轴Man小助手
// @namespace    http://tampermonkey.net/
// @version      0.7
// @description  将评论区的轴转换至Bilibili的笔记，实现手机可点的特性
// @author       as042971
// @include      *://www.bilibili.com/video/av*
// @include      *://www.bilibili.com/video/BV*
// @license MIT
// @grant        none
// @esversion    8
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    // 设置 useIndent = true 会在文本前增加缩进和引导线
    const useIndent = true;
    // 设置 useNewLine = true 会在文本后增加空行
    const useNewLine = false;

    const wait1s = function () {
        return new Promise(resolve => {
            setTimeout(() => {
                resolve();
            }, 1000);
        });
    };

    const waitforComponent = async function(name) {
        while (true) {
            let component = document.querySelector(name);
            if (component) {
                return component;
            }
            await wait1s();
        }
    }

    const markTime = async function (loc, time) {
        window.player.seek(time);
        document.querySelector('.ql-tag-btn').click();
        await wait1s();

        // 人工将时间戳置底
        let editor = document.querySelector('.ql-editor');
        editor.appendChild(editor.childNodes[loc]);
        // 清除多出来的那一个
        editor.removeChild(editor.childNodes[loc]);
    };

    const insertText = function (text, guide) {
        let editor = document.querySelector('.ql-editor');
        let insertItem = document.createElement('p');
        if (text.charAt(text.length-1) == '*') {
            text = '<strong class="ql-color-#ee230d">'+ text.substr(0, text.length - 1) +'</strong>';
        }

        if (useIndent) {
            if (guide) {
                text = '  <span class="ql-color-#cccccc">└─</span> ' + text;
            } else {
                text = '  　　 ' + text;
            }
        }
        insertItem.innerHTML = text;
        editor.appendChild(insertItem);
    };
    const insertNewLine = function () {
        let editor = document.querySelector('.ql-editor');
        let insertItem = document.createElement('p');
        editor.appendChild(insertItem);
    };

    const parseTime = function (timeStr) {
        const timePart = timeStr.split(":");
        if (timePart.length == 3) {
            return parseInt(timePart[0]) * 3600 + parseInt(timePart[1]) * 60 + parseInt(timePart[2]);
        } else {
            return parseInt(timePart[0]) * 60 + parseInt(timePart[1]);
        }
    };

    const handleTimeline = async function (inputStr) {
        let editor = document.querySelector('.ql-editor');
        const loc = editor.childNodes.length - 1;

        // h:mm:ss 型时间
        const timeRegex = /^(\d{1})\:([0-5]{1}\d{1})\:([0-5]{1}\d{1})$/;
        // mm:ss 型时间
        const timeRegex2 = /^([0-5]{1}\d{1})\:([0-5]{1}\d{1})$/;
        // 通过换行分隔
        const inputStrList = inputStr.split(/[(\r\n)\r\n]+/);
        for (let i = 0; i < inputStrList.length; i++) {
            let inputStrItem = inputStrList[i];
            let nonTimeStr = '';
            let time = 0;
            // 通过空格分隔
            const inputPart = inputStrItem.split(' ');
            for (let j = 0; j < inputPart.length; j++) {
                let part = inputPart[j];
                if (part) {
                    if (timeRegex.test(part) || timeRegex2.test(part)) {
                        // 这是一个时间戳
                        // 结束上一次的非时间戳内容
                        if (nonTimeStr != '') {
                            if (time != 0) {
                                await markTime(loc, time);
                                insertText(nonTimeStr, true);
                                time = 0;
                            } else {
                                insertText(nonTimeStr, false);
                            }
                            if (useNewLine) {
                                insertNewLine();
                            }
                            nonTimeStr = '';
                        }
                        // 标记这个时间戳
                        time = parseTime(part);
                    } else {
                        if (nonTimeStr != '') {
                            nonTimeStr += ' ';
                        }
                        nonTimeStr += part;
                    }
                }
            }
            if (nonTimeStr != '') {
                if (time != 0) {
                    await markTime(loc, time);
                    insertText(nonTimeStr, true);
                    time = 0;
                } else {
                    insertText(nonTimeStr, false);
                }
                if (useNewLine) {
                    insertNewLine('');
                }
            }
        }
    };

    const inject = function(node) {
        let rawTimeline = document.createElement('textarea');
        rawTimeline.setAttribute('id', 'inject-timeline');
        rawTimeline.setAttribute('class', 'ipt-txt');
        rawTimeline.setAttribute('rows', '1');
        rawTimeline.oninput = async function () {
            let data = rawTimeline.value;
            rawTimeline.value = "";
            rawTimeline.setAttribute('disabled', 'disabled');
            rawTimeline.setAttribute('placeholder', '处理中，请稍后...');
            await handleTimeline(data);
            rawTimeline.removeAttribute('disabled');
            rawTimeline.setAttribute('placeholder', '处理完毕，请换P(并将光标移至文末空行)或直接发表');
        };
        node.insertBefore(rawTimeline, node.childNodes[3]);
        rawTimeline.setAttribute('placeholder', '将光标移动至文末空行后，将轴粘贴至这里...');
    };

    let app = document.getElementById('app');
    let observerOptions = {
      childList: true,
      attributes: false,
      subtree: false
    };

    let observer = new MutationObserver((mutation_records) => {
        let note = document.querySelector('.active-note');
        if (note) {
            inject(note);
            observer.disconnect();
        }
    });
    observer.observe(app, observerOptions);
})();