// ==UserScript==
// @name         NodeSeek 银星公益图床增强脚本
// @namespace    http://tampermonkey.net/
// @version      1.7
// @description  在 NodeSeek 支持点击、拖拽和粘贴上传图片银星公益图床，并插入 Markdown 格式到编辑器
// @author       ZhangBreeze
// @match        https://www.nodeseek.com/*
// @grant        GM_xmlhttpRequest
// @license MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 创建文件输入元素（支持多选）
    const fileInput = document.createElement('input');
    fileInput.type = 'file';
    fileInput.accept = 'image/*';
    fileInput.multiple = true;
    fileInput.style.display = 'none';
    document.body.appendChild(fileInput);

    // 获取编辑器区域
    const editorWrapper = document.querySelector('#cm-editor-wrapper');
    const codeMirror = document.querySelector('.CodeMirror.cm-s-default.cm-s-nsk.CodeMirror-wrap.CodeMirror-overlayscroll');
    const cmInstance = document.querySelector('.CodeMirror')?.CodeMirror;

    // 添加常驻提示文字（避免重叠）
    function addUploadHint(container) {
        if (!container) return;
        const hint = document.createElement('div');
        hint.textContent = '支持拖拽或粘贴上传图片';
        hint.style.position = 'absolute';
        hint.style.bottom = '5px';
        hint.style.right = '5px';
        hint.style.color = '#888';
        hint.style.fontSize = '12px';
        hint.style.zIndex = '10';
        hint.style.pointerEvents = 'none';
        container.style.position = 'relative';
        container.appendChild(hint);
    }

    // 优先在 #cm-editor-wrapper 添加提示，若不存在则在 .CodeMirror 添加
    if (editorWrapper) {
        addUploadHint(editorWrapper);
    } else if (codeMirror) {
        addUploadHint(codeMirror);
    }

    // 创建上传提示
    function showUploadHint(container, fileCount) {
        if (!container) return;

        const existingHints = document.querySelectorAll('[id^="upload-hint-"]');
        existingHints.forEach(hint => hint.remove());

        const uploadHint = document.createElement('div');
        uploadHint.textContent = `正在上传 ${fileCount} 张图片，请稍等`;
        uploadHint.style.position = 'absolute';
        uploadHint.style.top = '50%';
        uploadHint.style.left = '50%';
        uploadHint.style.transform = 'translate(-50%, -50%)';
        uploadHint.style.color = '#666';
        uploadHint.style.fontSize = '14px';
        uploadHint.style.background = 'rgba(0, 0, 0, 0.1)';
        uploadHint.style.padding = '5px 10px';
        uploadHint.style.borderRadius = '3px';
        uploadHint.style.zIndex = '20';
        uploadHint.style.maxWidth = '80%';
        uploadHint.style.whiteSpace = 'nowrap';
        uploadHint.style.overflow = 'hidden';
        uploadHint.style.textOverflow = 'ellipsis';
        uploadHint.id = 'upload-hint-' + (container === editorWrapper ? 'wrapper' : 'codemirror');
        container.appendChild(uploadHint);
    }

    // 移除上传提示
    function removeUploadHint(container) {
        const uploadHint = document.getElementById('upload-hint-' + (container === editorWrapper ? 'wrapper' : 'codemirror'));
        if (uploadHint) uploadHint.remove();
    }

    // 防重锁
    let isUploading = false;

    // 监听图片图标点击并屏蔽原有功能
    document.addEventListener('click', function(e) {
        const target = e.target.closest('span.toolbar-item.i-icon.i-icon-pic');
        if (target && !isUploading) {
            e.preventDefault();
            e.stopPropagation();
            fileInput.click();
        }
    }, true);

    // 文件选择后的处理（支持多张）
    fileInput.addEventListener('change', function(e) {
        if (e.target.files && e.target.files.length > 0 && !isUploading) {
            isUploading = true;
            const files = Array.from(e.target.files);
            uploadMultipleFiles(files, editorWrapper || codeMirror).finally(() => {
                isUploading = false;
                fileInput.value = '';
            });
        }
    });

    // 拖拽上传功能（#cm-editor-wrapper）
    if (editorWrapper) {
        editorWrapper.addEventListener('dragover', (e) => {
            e.preventDefault();
            e.stopPropagation();
            if (!isUploading) editorWrapper.style.border = '2px dashed #000';
        });

        editorWrapper.addEventListener('dragleave', (e) => {
            e.preventDefault();
            e.stopPropagation();
            editorWrapper.style.border = '';
        });

        editorWrapper.addEventListener('drop', (e) => {
            e.preventDefault();
            e.stopPropagation();
            editorWrapper.style.border = '';
            if (e.dataTransfer.files && e.dataTransfer.files.length > 0 && !isUploading) {
                isUploading = true;
                const files = Array.from(e.dataTransfer.files).filter(file => file.type.startsWith('image/'));
                if (files.length > 0) {
                    uploadMultipleFiles(files, editorWrapper).finally(() => isUploading = false);
                } else {
                    isUploading = false;
                }
            }
        });
    }

    // 粘贴上传功能（#cm-editor-wrapper）
    if (editorWrapper) {
        editorWrapper.addEventListener('paste', (e) => {
            const items = (e.clipboardData || e.originalEvent.clipboardData).items;
            const imageFiles = [];
            for (let i = 0; i < items.length; i++) {
                if (items[i].type.indexOf('image') !== -1) {
                    const file = items[i].getAsFile();
                    if (file) imageFiles.push(file);
                }
            }
            if (imageFiles.length > 0 && !isUploading) {
                e.preventDefault();
                isUploading = true;
                uploadMultipleFiles(imageFiles, editorWrapper).finally(() => isUploading = false);
            }
        });
    }

    // 拖拽上传功能（CodeMirror）
    if (codeMirror) {
        codeMirror.addEventListener('dragover', (e) => {
            e.preventDefault();
            e.stopPropagation();
            if (!isUploading) codeMirror.style.border = '2px dashed #000';
        });

        codeMirror.addEventListener('dragleave', (e) => {
            e.preventDefault();
            e.stopPropagation();
            codeMirror.style.border = '';
        });

        codeMirror.addEventListener('drop', (e) => {
            e.preventDefault();
            e.stopPropagation();
            codeMirror.style.border = '';
            if (e.dataTransfer.files && e.dataTransfer.files.length > 0 && !isUploading) {
                isUploading = true;
                const files = Array.from(e.dataTransfer.files).filter(file => file.type.startsWith('image/'));
                if (files.length > 0) {
                    uploadMultipleFiles(files, codeMirror).finally(() => isUploading = false);
                } else {
                    isUploading = false;
                }
            }
        });
    }

    // 粘贴上传功能（CodeMirror）
    if (codeMirror) {
        codeMirror.addEventListener('paste', (e) => {
            const items = (e.clipboardData || e.originalEvent.clipboardData).items;
            const imageFiles = [];
            for (let i = 0; i < items.length; i++) {
                if (items[i].type.indexOf('image') !== -1) {
                    const file = items[i].getAsFile();
                    if (file) imageFiles.push(file);
                }
            }
            if (imageFiles.length > 0 && !isUploading) {
                e.preventDefault();
                isUploading = true;
                uploadMultipleFiles(imageFiles, codeMirror).finally(() => isUploading = false);
            }
        });
    }

    // 上传多张图片
    async function uploadMultipleFiles(files, container) {
        if (files.length === 0) return;
        showUploadHint(container, files.length);
        const uploadPromises = files.map(file => {
            const formData = new FormData();
            formData.append('file', file);
            return uploadToImageHost(formData, file.name);
        });
        try {
            await Promise.all(uploadPromises);
        } catch (error) {
            console.error('批量上传失败:', error);
        } finally {
            removeUploadHint(container);
        }
    }

    // 上传单张图片到图床
    function uploadToImageHost(formData, fileName) {
        return new Promise((resolve, reject) => {
            const apiUrl = 'https://img.sss.wiki/api/v1/upload';
            const token = 'Bearer 9|aiSZmhAzf9u7k8slCHXVe8ZDpyH2earpsgQcgHoi';

            GM_xmlhttpRequest({
                method: 'POST',
                url: apiUrl,
                headers: {
                    'Authorization': token,
                    'Accept': 'application/json'
                },
                data: formData,
                onload: (response) => {
                    try {
                        const jsonResponse = JSON.parse(response.responseText);
                        if (response.status === 200 && jsonResponse && jsonResponse.data && jsonResponse.data.links && jsonResponse.data.links.url) {
                            const imageUrl = jsonResponse.data.links.url;
                            const markdownImage = `![${fileName.split('.').slice(0, -1).join('.')}](${imageUrl})`;
                            console.log('上传成功，Markdown:', markdownImage);
                            insertToEditor(markdownImage);
                            resolve();
                        } else {
                            console.error('上传成功但未获取到有效链接');
                            reject(new Error('Invalid response'));
                        }
                    } catch (error) {
                        console.error('解析响应错误:', error);
                        reject(error);
                    }
                },
                onerror: (error) => {
                    console.error('上传错误详情:', error);
                    reject(error);
                },
                ontimeout: () => {
                    console.error('请求超时');
                    reject(new Error('Timeout'));
                },
                timeout: 10000
            });
        });
    }

    // 将 Markdown 插入到 CodeMirror 编辑器
    function insertToEditor(markdown) {
        if (cmInstance) {
            const cursor = cmInstance.getCursor();
            cmInstance.replaceRange(markdown + '\n', cursor);
            console.log('已插入 Markdown 到编辑器');
        } else {
            const editable = document.querySelector('.CodeMirror textarea') || document.querySelector('textarea');
            if (editable) {
                editable.value += markdown + '\n';
            } else {
                console.error('未找到可编辑的 CodeMirror 实例或 textarea');
            }
        }
    }
})();