// ==UserScript==
// @name         超星多编辑器智能粘贴神器
// @namespace    https://mooc1-api.chaoxing.com/
// @match        *://*.chaoxing.com/*
// @version      1.0.1
// @description  支持多编辑器识别、选择、批量粘贴（修复重复加载，带拖拽功能）
// @icon         http://pan-yz.chaoxing.com/favicon.ico
// @author       User
// @author       Muyue -imuyue.com
// @connect      mooc1-1.chaoxing.com
// @connect      mooc1-1.neauce.com
// @connect      mooc1.chaoxing.com
// @connect      mooc1.neauce.com
// @connect      mooc1-2.chaoxing.com
// @connect      mooc1-2.neauce.com
// @connect      mooc1-api.chaoxing.com
// @connect      mooc2-ans.chaoxing.com
// @connect      passport2-api.chaoxing.com
// @connect      sso.chaoxing.com
// @grant        none
// @tag          学习通
// ==/UserScript==

(function() {
    'use strict';
    
    console.log('%c[多编辑器神器] 已加载', 'background: #ff00ff; color: white; font-size: 16px; font-weight: bold;');
    
    // ==================== 核心功能：暴力注入 ====================
    const pasteToUEditor = (content, targetIndex = null) => {
        const iframes = getAllEditors(); 
        if (iframes.length === 0) {
            console.error('[暴力粘贴] 未找到任何UEditor编辑器');
            alert('未检测到编辑器，请确保已进入答题页面');
            return false;
        }
        if (targetIndex !== null && iframes[targetIndex]) {
            return injectToIframe(iframes[targetIndex].iframe, content, targetIndex);
        }
        iframes.forEach((info, i) => {
            injectToIframe(info.iframe, content, i);
        });
        return true;
    };
    
    const injectToIframe = (iframe, content, index) => {
        try {
            const doc = iframe.contentDocument;
            const body = doc.body;
            body.onpaste = null;
            iframe.contentWindow.editorPaste = () => true;
            const htmlContent = content.replace(/\n/g, '</p><p>');
            body.innerHTML = '<p>' + htmlContent + '</p>'; 
            if (window.UE && window.UE.instants) {
                const editorKey = Object.keys(window.UE.instants).find(function(k) {
                    return window.UE.instants[k].document === doc;
                });
                if (editorKey) {
                    const editor = window.UE.instants[editorKey];
                    editor.fireEvent('contentchange');
                    editor.fireEvent('afterpaste');
                }
            }
            console.log('✅ [暴力粘贴] 成功注入编辑器' + index);
            return true;
        } catch(e) {
            console.error('❌ [暴力粘贴] 编辑器' + index + '注入失败:', e.message);
            return false;
        }
    };
    
    // ==================== 智能识别所有编辑器 ====================
    const getAllEditors = () => {
        const iframes = Array.from(document.querySelectorAll('iframe[id^="ueditor_"]'));
        const editors = [];
        iframes.forEach(function(iframe, index) {
            try {
                const doc = iframe.contentDocument;
                const body = doc.body;
                const questionText = findQuestionText(iframe, index); 
                editors.push({
                    index: index,
                    iframe: iframe,
                    body: body,
                    question: questionText,
                    element: iframe,
                    visible: iframe.offsetParent !== null
                });
            } catch(e) {
                console.warn('[识别] 编辑器' + index + '无法访问');
            }
        });
        return editors;
    };
    
    const findQuestionText = (iframe, index) => {
        try {
            const parent = iframe.parentElement;
            const prev = iframe.previousElementSibling;
            const questionElement = parent.querySelector('.mark_name, .questionName, .Zy_question') || 
                                   (prev ? prev.querySelector('.mark_name, .questionName, .Zy_question') : null);
            if (questionElement) {
                return questionElement.textContent.trim().substring(0, 20) + '...';
            }
            return '第' + (index + 1) + '题';
        } catch(e) {
            return '第' + (index + 1) + '题';
        }
    };
    
    // ==================== 拖拽功能核心（独立函数） ====================
    function initDragFunction(dragPanel) {
        if (!dragPanel) {
            console.warn('拖拽面板元素未找到');
            return;
        }
        const dragHandle = dragPanel.querySelector('#drag-handle');
        if (!dragHandle) return;
        var isDragging = false;
        var startX = 0;
        var startY = 0;
        var panelLeft = 0;
        var panelTop = 0;
        dragHandle.addEventListener('mousedown', function(e) {
            e.preventDefault();
            e.stopPropagation();
            isDragging = true;
            startX = e.clientX;
            startY = e.clientY;
            panelLeft = parseInt(window.getComputedStyle(dragPanel).left, 10) || 0;
            panelTop = parseInt(window.getComputedStyle(dragPanel).top, 10) || 0;
            dragHandle.style.background = 'rgba(255, 0, 255, 0.1)';
            dragPanel.style.userSelect = 'none';
        });
        document.addEventListener('mousemove', function(e) {
            if (!isDragging) return;
            var dx = e.clientX - startX;
            var dy = e.clientY - startY;
            var maxLeft = window.innerWidth - dragPanel.offsetWidth - 20;
            var maxTop = window.innerHeight - dragPanel.offsetHeight - 20;
            var newLeft = Math.max(0, Math.min(panelLeft + dx, maxLeft));
            var newTop = Math.max(0, Math.min(panelTop + dy, maxTop));
            dragPanel.style.left = newLeft + 'px';
            dragPanel.style.top = newTop + 'px';
            dragPanel.style.right = 'auto';
        });
        function endDrag() {
            if (!isDragging) return;
            isDragging = false;
            dragHandle.style.background = '';
            dragPanel.style.userSelect = '';
        }
        document.addEventListener('mouseup', endDrag);
        document.addEventListener('mouseleave', endDrag);
    }
    
    // ==================== 功能：输入框UI（增强版） ====================
    let clipboardCache = '';
    
    const addUI = () => {
        const panel = document.createElement('div');
        panel.innerHTML = `
            <div id="draggable-paste-panel" style="position: fixed; top: 10px; right: 10px; z-index: 99999; 
                            background: #fff; border: 2px solid #ff00ff; border-radius: 8px; 
                            padding: 15px; box-shadow: 0 0 15px rgba(255,0,255,0.5); 
                            width: 350px; font-family: Arial, sans-serif; cursor: default;">
                <h3 id="drag-handle" style="margin: 0 0 10px 0; color: #ff00ff; font-size: 14px; text-align: center; 
                           cursor: move; padding: 5px; border-radius: 4px; user-select: none;">
                    🚀 多编辑器智能粘贴
                </h3>
                <div style="margin-bottom: 10px;">
                    <label style="font-size: 12px; color: #333; font-weight: bold;">目标编辑器：</label>
                    <select id="editor-selector" style="width: 100%; padding: 6px; border: 1px solid #ddd; 
                               border-radius: 4px; font-size: 12px; margin-top: 5px;">
                        <option value="all">🎯 全部编辑器（批量）</option>
                        <option value="current">🖱️ 当前激活的编辑器</option>
                    </select>
                </div>
                <div id="editor-list" style="max-height: 100px; overflow-y: auto; 
                                             border: 1px solid #eee; border-radius: 4px; 
                                             padding: 6px; margin-bottom: 10px; font-size: 11px;">
                    正在识别编辑器...
                </div>
                <textarea id="paste-input" placeholder="在此输入答案内容，或按Ctrl+Shift+V读取剪贴板..." 
                          style="width: 100%; height: 100px; border: 1px solid #ddd; 
                                 border-radius: 4px; padding: 8px; font-size: 13px;
                                 margin-bottom: 5px; resize: vertical;">
                </textarea>
                <div style="text-align: right; font-size: 11px; color: #666; margin-bottom: 5px;">
                    <span id="char-count">0</span> 字符
                </div>
                <button id="execute-paste" style="width: 100%; background: #ff00ff; color: white; 
                        border: none; padding: 10px; border-radius: 4px; cursor: pointer; 
                        font-size: 14px; font-weight: bold; margin-bottom: 8px;">
                    🚀 执行粘贴
                </button>
                <div style="display: flex; gap: 5px; font-size: 11px;">
                    <button id="load-clipboard" style="flex: 1; background: #0c0; color: white; 
                            border: none; padding: 6px; border-radius: 4px; cursor: pointer;">
                        📋 读取剪贴板
                    </button>
                    <button id="clear-input" style="flex: 1; background: #999; color: white; 
                            border: none; padding: 6px; border-radius: 4px; cursor: pointer;">
                        清空
                    </button>
                    <button id="refresh-editors" style="flex: 1; background: #06c; color: white; 
                            border: none; padding: 6px; border-radius: 4px; cursor: pointer;">
                        🔄 刷新列表
                    </button>
                </div>
                <div id="status" style="margin-top: 10px; font-size: 12px; color: #666; 
                                        min-height: 18px; text-align: center;"></div>
            </div>
        `;
        document.body.appendChild(panel);
        const dragPanel = document.getElementById('draggable-paste-panel');
        initDragFunction(dragPanel);
        const input = document.getElementById('paste-input');
        const count = document.getElementById('char-count');
        const status = document.getElementById('status');
        const selector = document.getElementById('editor-selector');
        const editorList = document.getElementById('editor-list');
        input.addEventListener('input', function() {
            count.textContent = this.value.length;
            localStorage.setItem('superPaste_content', this.value);
        });
        const saved = localStorage.getItem('superPaste_content');
        if (saved) {
            input.value = saved;
            count.textContent = saved.length;
        }
        const updateEditorList = () => {
            const editors = getAllEditors();
            if (editors.length === 0) {
                editorList.innerHTML = '<div style="color: red;">未找到编辑器</div>';
                return;
            }
            while (selector.options.length > 2) {
                selector.remove(2);
            }
            var listHtml = '';
            editors.forEach(function(info) {
                var opacityStyle = info.visible ? '' : 'opacity: 0.6;';
                listHtml += '<div style="padding: 2px 0; ' + opacityStyle + '">' +
                    '<strong>编辑器' + info.index + ':</strong> ' + info.question +
                    (info.visible ? '✅' : '⏸️') +
                    '</div>';
            });
            editorList.innerHTML = listHtml;
            editors.forEach(function(info) {
                const option = document.createElement('option');
                option.value = info.index;
                option.textContent = '📝 编辑器' + info.index + ': ' + info.question;
                selector.appendChild(option);
            });
        };
        updateEditorList();
        setInterval(updateEditorList, 5000);
        document.getElementById('refresh-editors').onclick = updateEditorList;
        document.getElementById('load-clipboard').onclick = async function() {
            try {
                const text = await navigator.clipboard.readText();
                if (text) {
                    input.value = text;
                    count.textContent = text.length;
                    clipboardCache = text;
                    status.textContent = '✅ 剪贴板内容已读取';
                    status.style.color = '#0c0';
                    localStorage.setItem('superPaste_content', text);
                } else {
                    status.textContent = '❌ 剪贴板为空';
                    status.style.color = '#f00';
                }
            } catch(err) {
                status.textContent = '❌ 无法访问剪贴板';
                status.style.color = '#f00';
            }
            setTimeout(function() {
                status.textContent = '';
                status.style.color = '#666';
            }, 3000);
        };
        document.getElementById('clear-input').onclick = function() {
            input.value = '';
            count.textContent = '0';
            localStorage.removeItem('superPaste_content');
            status.textContent = '🗑️ 已清空';
            status.style.color = '#f90';
            setTimeout(function() {
                status.textContent = '';
                status.style.color = '#666';
            }, 2000);
        };
        document.getElementById('execute-paste').onclick = async function() {
            const content = input.value.trim() || clipboardCache;
            if (!content) {
                status.textContent = '❌ 请输入内容';
                status.style.color = '#f00';
                input.focus();
                return;
            }
            const target = selector.value;
            let success = false;
            if (target === 'all') {
                success = pasteToUEditor(content);
                status.textContent = success ? '✅ 已粘贴到全部' : '❌ 粘贴失败';
            } else if (target === 'current') {
                const active = document.activeElement;
                const editors = getAllEditors();
                let currentIndex = null;
                if (active.tagName === 'IFRAME') {
                    var match = null;
                    for (var i = 0; i < editors.length; i++) {
                        if (editors[i].iframe === active) {
                            match = editors[i];
                            break;
                        }
                    }
                    if (match) currentIndex = match.index;
                }
                if (currentIndex === null && window.lastClickedEditor !== undefined) {
                    currentIndex = window.lastClickedEditor;
                }
                if (currentIndex === null) {
                    var visible = null;
                    for (var j = 0; j < editors.length; j++) {
                        if (editors[j].visible) {
                            visible = editors[j];
                            break;
                        }
                    }
                    if (visible) currentIndex = visible.index;
                }
                success = pasteToUEditor(content, currentIndex);
                status.textContent = success ? '✅ 已粘贴到编辑器' + currentIndex : '❌ 粘贴失败';
            } else {
                success = pasteToUEditor(content, parseInt(target));
                status.textContent = success ? '✅ 已粘贴到编辑器' + target : '❌ 粘贴失败';
            }
            status.style.color = success ? '#0c0' : '#f00';
            setTimeout(function() {
                status.textContent = '';
                status.style.color = '#666';
            }, 3000);
        };
        document.addEventListener('click', function(e) {
            const iframe = e.target.closest('iframe[id^="ueditor_"]');
            if (iframe) {
                const editors = getAllEditors();
                var match = null;
                for (var k = 0; k < editors.length; k++) {
                    if (editors[k].iframe === iframe) {
                        match = editors[k];
                        break;
                    }
                }
                if (match) {
                    window.lastClickedEditor = match.index;
                    console.log('[暴力粘贴] 记录点击: 编辑器' + match.index);
                }
            }
        }, true);
    };
    
    // 延迟添加UI，先检查是否已存在面板（防重复加载）
    setTimeout(() => {
        if (document.getElementById('draggable-paste-panel')) {
            console.warn('[多编辑器神器] 检测到重复加载，已跳过');
            return;
        }
        addUI();
    }, 1500);
    
    // ==================== 快捷键 ====================
    document.addEventListener('keydown', async function(e) {
        if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key === 'v') {
            e.preventDefault();
            try {
                const text = await navigator.clipboard.readText();
                if (text) {
                    clipboardCache = text;
                    pasteToUEditor(text);
                    showNotification('✅ 内容已粘贴到全部');
                }
            } catch(err) {
                showNotification('❌ 无法访问剪贴板');
            }
        }
        if ((e.ctrlKey || e.metaKey) && e.shiftKey && e.key === 'c') {
            var clearBtn = document.getElementById('clear-input');
            if (clearBtn) clearBtn.click();
        }
    });
    
    // ==================== 通知 ====================
    const showNotification = function(message) {
        const div = document.createElement('div');
        div.textContent = message;
        div.style.cssText = 'position: fixed; top: 50%; left: 50%; transform: translate(-50%, -50%);' +
            'background: #00ff00; color: #000; padding: 15px 25px; border-radius: 8px;' +
            'z-index: 999999; font-size: 16px; font-weight: bold;' +
            'box-shadow: 0 0 20px rgba(0,255,0,0.5); animation: fadeOut 2s forwards;';
        const style = document.createElement('style');
        style.textContent = '@keyframes fadeOut {' +
            '0% { opacity: 1; transform: translate(-50%, -50%) scale(1); }' +
            '70% { opacity: 1; transform: translate(-50%, -50%) scale(1); }' +
            '100% { opacity: 0; transform: translate(-50%, -50%) scale(0.8); pointer-events: none; }' +
            '}';
        if (!document.querySelector('#superPaste_animation')) {
            style.id = 'superPaste_animation';
            document.head.appendChild(style);
        }
        document.body.appendChild(div);
        setTimeout(function() {
            div.remove();
        }, 2000);
    };
    
    // ==================== API ====================
    window.superPaste = {
        all: function(content) {
            return pasteToUEditor(content);
        },
        to: function(content, index) {
            return pasteToUEditor(content, index);
        },
        count: function() {
            return getAllEditors().length;
        },
        status: function() {
            const editors = getAllEditors();
            console.log('[暴力粘贴] 找到 ' + editors.length + ' 个编辑器');
            editors.forEach(function(info) {
                try {
                    console.log('编辑器' + info.index + ': ' + info.question + ' ' + (info.visible ? '✅' : '⏸️'));
                } catch(e) {
                    console.log('编辑器' + info.index + ': 无法访问');
                }
            });
        },
        clearAll: function() {
            var iframes = document.querySelectorAll('iframe[id^="ueditor_"]');
            iframes.forEach(function(iframe, i) {
                try {
                    iframe.contentDocument.body.innerHTML = '';
                    console.log('编辑器' + i + '已清空');
                } catch(e) {}
            });
        },
        getEditors: function() {
            return getAllEditors();
        }
    };
    
})();