// ==UserScript==
// @name         B站弹幕工具
// @description  点击弹幕自动发送 + 快捷弹幕工具
// @namespace    http://tampermonkey.net/
// @version      12.0
// @match        https://live.bilibili.com/*
// @grant        none
// ==/UserScript==
if (!/^\/\d+/.test(location.pathname)) {
    console.log("⛔ 非直播间页面，不加载弹幕工具");
    return;
}
(function () {
    'use strict';

    let config = {
        enabled: true,
        minInterval: 3000,
        delayMin: 500,
        delayMax: 1500,
        maxRepeat: 2,
        quickText: localStorage.getItem("quickText") || "哈哈哈,666,牛逼,冲冲冲"
    };

    let lastSendTime = 0;

    // ===== 获取输入框 =====
    function getInputBox() {
        return document.querySelector('textarea.chat-input')
            || document.querySelector('[contenteditable="true"]');
    }

    // ===== 获取发送按钮 =====
    function getSendBtn() {
        return [...document.querySelectorAll('button')]
            .find(btn => btn.innerText.trim() === '发送');
    }

    // ===== 去用户名 =====
    function cleanText(text) {
        const match = text.match(/^[^:：]+[:：]\s*(.*)$/);
        return match ? match[1] : text;
    }

    // ===== 发送（修复版）=====
    function sendDanmu(rawText) {
        const now = Date.now();
        if (now - lastSendTime < config.minInterval) return;

        let text = cleanText(rawText);

        const delay = Math.random()*(config.delayMax-config.delayMin)+config.delayMin;

        setTimeout(() => {
            const input = getInputBox();
            const btn = getSendBtn();

            if (!input || !btn) {
                console.log("❌ 找不到输入框或按钮");
                return;
            }

            // ===== 核心修复 =====
            input.focus();

            if (input.tagName === "TEXTAREA") {
                input.value = text;
            } else {
                input.innerText = text;
            }

            input.dispatchEvent(new InputEvent('input', { bubbles: true }));
            input.dispatchEvent(new Event('change', { bubbles: true }));

            btn.click();

            lastSendTime = Date.now();
            console.log("✅ 发送:", text);

        }, delay);
    }

    // ===== 点击弹幕发送 =====
    function bindDanmuClick() {
        document.querySelectorAll('.chat-item').forEach(item=>{
            if (item.dataset.binded) return;
            item.dataset.binded = 1;

            item.style.cursor = "pointer";

            item.onclick = ()=>{
                if (!config.enabled) return;
                sendDanmu(item.innerText.trim());
            };
        });
    }

    // ===== 拖动 =====
    function makeDraggable(el){
        let down=false,ox,oy;
        el.onmousedown=e=>{down=true;ox=e.clientX-el.offsetLeft;oy=e.clientY-el.offsetTop;}
        document.onmousemove=e=>{
            if(!down)return;
            el.style.left=e.clientX-ox+"px";
            el.style.top=e.clientY-oy+"px";
            el.style.right="auto";
        }
        document.onmouseup=()=>down=false;
    }

    // ===== 候选词按钮 =====
    function createQuickBtns(container){
        container.innerHTML="";
        config.quickText.split(',').map(s=>s.trim()).filter(Boolean).forEach(t=>{
            const b=document.createElement("button");
            b.innerText=t;
            b.style.cssText=`
                margin:3px;padding:4px 8px;border:none;
                border-radius:6px;background:#00a1d6;color:#fff;cursor:pointer;
            `;
            b.onclick=()=>sendDanmu(t);
            container.appendChild(b);
        });
    }

    // ===== UI =====
    function createPanel(){
        const panel=document.createElement("div");

        panel.style.cssText=`
            position:fixed;right:20px;top:200px;z-index:9999;
            background:rgba(30,30,30,0.95);color:#fff;
            padding:12px;border-radius:10px;font-size:12px;
            box-shadow:0 0 12px rgba(0,0,0,.6);width:230px;
        `;

        panel.innerHTML=`
            <div style="font-weight:bold;margin-bottom:6px;">弹幕工具</div>

            <label><input type="checkbox" id="enable" checked> 启用</label><br>

            间隔 <input id="interval"><br>
            延迟 <input id="dmin"> - <input id="dmax"><br>

            <div style="margin-top:6px;">候选词：</div>
            <textarea id="quickText"></textarea>

            <div id="quickBtns"></div>
        `;

        document.body.appendChild(panel);
        makeDraggable(panel);

        const styleInput = (el)=>{
            el.style.cssText=`
                width:60px;margin:2px;
                background:#222;color:#fff;
                border:1px solid #555;border-radius:4px;
            `;
        };

        panel.querySelectorAll("input").forEach(styleInput);

        const textarea = panel.querySelector("#quickText");
        textarea.style.cssText=`
            width:100%;height:50px;margin-top:3px;
            background:#222;color:#fff;
            border:1px solid #555;border-radius:4px;
        `;

        // 初始化
        panel.querySelector("#interval").value=config.minInterval;
        panel.querySelector("#dmin").value=config.delayMin;
        panel.querySelector("#dmax").value=config.delayMax;
        textarea.value=config.quickText;

        const quickDiv=panel.querySelector("#quickBtns");
        createQuickBtns(quickDiv);

        // ===== 持久化 =====
        textarea.oninput=e=>{
            config.quickText=e.target.value;
            localStorage.setItem("quickText", config.quickText);
            createQuickBtns(quickDiv);
        };

        panel.querySelector("#enable").onchange=e=>config.enabled=e.target.checked;
        panel.querySelector("#interval").oninput=e=>config.minInterval=+e.target.value;
        panel.querySelector("#dmin").oninput=e=>config.delayMin=+e.target.value;
        panel.querySelector("#dmax").oninput=e=>config.delayMax=+e.target.value;
    }

    const observer=new MutationObserver(bindDanmuClick);

    window.addEventListener('load',()=>{
        setTimeout(()=>{
            createPanel();
            bindDanmuClick();
            observer.observe(document.body,{childList:true,subtree:true});
        },3000);
    });

})();