// 简单版本的论坛编辑器，确保图片插入功能正常
const { createApp, ref, computed, onMounted, nextTick, onUnmounted } = Vue;
import { headTop } from "../component/head-top/head-top.js";

const editApp = createApp({
    setup() {
        let titleLength = ref(200);

        let uniqid = ref("");
        onMounted(() => {
            const params = getUrlParams();
            uniqid.value = params.uniqid || "";

            getUserInfoWin();

            cUpload();
            init();

            checkWConfig();

            // 添加selectionchange事件监听，当鼠标选中区域内容时更新lastSelection
            document.addEventListener("selectionchange", handleSelectionChange);
        });

        // 组件卸载时移除事件监听
        onUnmounted(() => {
            document.removeEventListener("selectionchange", handleSelectionChange);
        });

        let imageLength = 10;
        let videoLength = 5;

        const checkWConfig = () => {
            const wConfig = JSON.parse(localStorage.getItem("wConfig")) || {};
            console.log("wConfig", wConfig);

            if (wConfig.time) {
                const time = new Date(wConfig.time);
                const now = new Date();
                if (now - time > 24 * 60 * 60 * 1000) getWConfig();
                else {
                    const config = wConfig.config || {};
                    titleLength.value = config.max_topic_title_length;
                    imageLength = config.topic_image_count || 0;
                    videoLength = config.topic_video_count || 0;
                }
            } else {
                getWConfig();
            }
        };

        const getWConfig = () => {
            ajaxGet("/v2/api/config/website").then((res) => {
                if (res.code == 200) {
                    let data = res["data"] || {};
                    const config = data.config || {};
                    titleLength.value = config.max_topic_title_length;
                    imageLength = config.topic_image_count || 0;
                    videoLength = config.topic_video_count || 0;

                    data.time = new Date().toISOString();
                    localStorage.setItem("wConfig", JSON.stringify(data));
                }
            });
        };

        let isLogin = ref(false);
        let realname = ref(0); // 是否已经实名
        let userInfoWin = ref({});
        let permissions = ref([]);

        const getUserInfoWin = () => {
            const checkUser = () => {
                const user = window.userInfoWin;
                if (!user) return;
                document.removeEventListener("getUser", checkUser);
                realname.value = user.realname;
                userInfoWin.value = user;
                if (user?.uin > 0 || user?.uid > 0) isLogin.value = true;
                permissions.value = user?.authority || [];
            };
            document.addEventListener("getUser", checkUser);
        };

        const openAttest = () => {
            const handleAttestClose = () => {
                document.removeEventListener("closeAttest", handleAttestClose);
                realname.value = window.userInfoWin?.realname || 0;
            };
            // 启动认证流程时添加监听
            document.addEventListener("closeAttest", handleAttestClose);
            loadAttest(2);
        };

        // 跳转登录
        const goLogin = () => {
            if (typeof window === "undefined") return;
            if (window["userInfoWin"] && Object.keys(window["userInfoWin"]).length !== 0) {
                if (window["userInfoWin"]["uid"]) isLogin.value = true;
                else ajax_login();
            } else ajax_login();
        };

        let uConfigData = {};

        const cUpload = () => {
            ajaxGet(`/v2/api/config/upload?type=topic`).then((res) => {
                const data = res.data;
                uConfigData = data;
            });
        };

        let info = ref({});
        let tagList = ref([]);
        let token = ref("");
        let infoImages = [];
        const init = () => {
            ajax("/v2/api/forum/postPublishInit", {
                uniqid: uniqid.value,
            })
                .then((res) => {
                    const data = res.data;
                    if (res.code != 200) {
                        creationAlertBox("error", res.message || "操作失败");
                        return;
                    }

                    const infoTarget = data.info || {};

                    if (infoTarget.content) infoTarget.content = restoreHtml(infoTarget.content, infoTarget.attachments);

                    info.value = infoTarget;
                    token.value = data.token;

                    nextTick(() => {
                        judgeIsEmpty();
                    });
                })
                .catch((err) => {
                    console.log("err", err);
                });
        };

        const restoreHtml = (formattedText, attachments) => {
            const imageList = attachments?.images || [];

            const filesList = attachments?.files || [];
            const videosList = attachments?.videos || [];

            let html = formattedText;

            // 1. 还原换行符为<br>标签
            html = html.replace(/\n/g, "<br>");

            // 2. 还原块级标签的换行标记
            html = html.replace(/<br><div>/g, "<div>");
            html = html.replace(/<\/div><br>/g, "</div>");

            // 3. 还原标签标记为span.blue
            html = html.replace(/\[tag\]([^[]+)\[\/tag\]/gi, '<span class="blue">#$1</span> <span class="fill"></span> ');

            // 4. 还原粗体标记为h2标签
            html = html.replace(/\[b\]([\s\S]*?)\[\/b\]/gi, "<h2>$1</h2>");

            // 5. 还原图片标记为img标签（使用提供的imageList）
            html = html.replace(/\[attachimg\](\d+)\[\/attachimg\]/gi, (match, aid) => {
                // 查找对应的图片信息
                const image = imageList.find((img) => img.aid == aid);
                if (image) {
                    imageList.splice(imageList.indexOf(image), 1);
                    return `<img src="${image.url}" data-aid="${aid}"><br/>`;
                }
                return match; // 未找到对应图片时保留原始标记
            });

            html = html.replace(/\[attach\](\d+)\[\/attach\]/gi, (match, aid) => {
                // 查找对应的图片信息
                const image = imageList.find((img) => img.aid == aid);
                if (image) {
                    imageList.splice(imageList.indexOf(image), 1);
                    return `<img src="${image.url}" data-aid="${aid}"><br/>`;
                }

                // 查找对应的视频信息
                const video = videosList.find((v) => v.aid == aid);
                if (video) {
                    console.log("video", video);
                    videosList.splice(videosList.indexOf(video), 1);
                    return `<video contenteditable="false" src="${video.url}" width="400" height="400" preload="none" poster="${video.posterurl}" aid="${video.aid}" posterid="${video.posterid}" controls></video>`;
                }

                return match; // 未找到对应图片时保留原始标记
            });

            // 6. 还原填充标签
            html = html.replace(/(<span class="blue">[^<]+<\/span>)\s+/gi, '$1 <span class="fill"></span> ');

            // 7. 清理多余的<br>标签
            html = html.replace(/<br><br>/g, "<br>");

            imageList.forEach((element) => {
                html += `<img src="${element.url}" data-aid="${element.aid}"><br/>`;
            });

            // video 不要预加载
            videosList.forEach((element) => {
                html += `<video contenteditable="false" src="${element.url}" width="400" height="400" preload="none" poster="${element.posterurl}" aid="${element.aid}" posterid="${element.posterid}" controls></video><br/>`;
            });

            return html;
        };

        onMounted(() => {
            setTimeout(() => focusLastNode(), 1000);
            // document.addEventListener("keydown", handleUndoKeydown);
        });

        const editorRef = ref(null);

        const focusLastNode = () => {
            const newRange = document.createRange();
            const textNode = document.createTextNode("");
            editorRef.value.appendChild(textNode);
            newRange.setStartAfter(textNode, 0);
            newRange.setEndAfter(textNode, 0);
            lastSelection = newRange;
        };

        let lastSelection = null;

        let loading = ref(false);

        const maxSize = 20 * 1024 * 1024; // 20MB

        const insertImage = (event) => {
            const images = extractImages(editorRef.value);

            const count = imageLength - images.length || 0;

            if (count == 0) {
                creationAlertBox("error", `最多只能上传 ${imageLength} 张图片`);
                return;
            }

            const target = event.target.files[0];
            if (!target) return; // 处理未选择文件的情况

            if (target.size > maxSize) {
                creationAlertBox("error", "文件大小不能超过 20MB");
                return;
            }

            loading.value = true;

            uploading(target, target.name, "image").then((data) => {
                const selection = window.getSelection();
                editorRef.value.focus();
                if (lastSelection) {
                    selection.removeAllRanges();
                    selection.addRange(lastSelection);
                }
                const html = `<img src="${data.url}" data-aid="${data.aid}"><br/>`;
                document.execCommand("insertHTML", false, html);
                judgeIsEmpty();
            });
        };

        const insertVideo = async (event) => {
            const videos = extractVideos(editorRef.value);

            const count = videoLength - videos.length || 0;

            if (count == 0) {
                creationAlertBox("error", `最多只能上传 ${videoLength} 个视频`);
                return;
            }

            const videoFile = event.target.files[0];

            if (!videoFile) return; // 处理未选择文件的情况

            if (videoFile.size > maxSize) {
                creationAlertBox("error", "文件大小不能超过 20MB");
                return;
            }

            loading.value = true;

            console.log("videoFile", videoFile);

            // 步骤1：提取视频第一帧（等待提取完成）
            const coverFile = await getVideoFirstFrame(videoFile);
            console.log("第一帧提取成功", coverFile);

            // 步骤2：先上传视频文件（type 传 'video'，按后端要求调整）
            const videoUploadRes = await uploading(videoFile, videoFile.name, "video");
            console.log("视频上传成功", videoUploadRes);

            // 步骤3：再上传第一帧封面（type 传 'cover'，按后端要求调整）
            const coverUploadRes = await uploading(coverFile, coverFile.name, "image");
            console.log("封面上传成功", coverUploadRes);

            console.log("最终", videoUploadRes, videoUploadRes);

            const selection = window.getSelection();
            editorRef.value.focus();
            if (lastSelection) {
                selection.removeAllRanges();
                selection.addRange(lastSelection);
            }
            const html = `<video width="400" height="400" controls preload="none" poster="${coverUploadRes.url}" src="${videoUploadRes.url}" contenteditable="false" posterid="${coverUploadRes.aid}" aid="${videoUploadRes.aid}"></video><br/>`;
            document.execCommand("insertHTML", false, html);
            judgeIsEmpty();
        };

        let isEmpty = ref(true);

        const onEditorInput = (event) => {
            const selection = window.getSelection();

            if (selection.rangeCount > 0) {
                lastSelection = selection.getRangeAt(0);
                // console.log("更新选区");
                updatePTitleStatus();
            }

            judgeIsEmpty();

            // debouncedGetTagList();
        };

        // 防抖函数
        const debounce = (fn, delay = 500) => {
            let timer = null;
            return function () {
                if (timer) {
                    clearTimeout(timer);
                }
                timer = setTimeout(() => {
                    fn.apply(this, arguments);
                    timer = null;
                }, delay);
            };
        };

        const getRandomChinese = () => {
            // 中文 Unicode 范围：\u4e00 - \u9fa5（共约 2 万个汉字）
            const start = 0x4e00; // 起始编码
            const end = 0x9fa5; // 结束编码
            // 生成范围内的随机整数，转为字符
            return String.fromCodePoint(Math.floor(Math.random() * (end - start + 1) + start));
        };

        const generateRandomString = (length = 5) => {
            // 定义字符集：包含大小写字母和数字
            const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
            let result = "";
            // 循环生成指定长度的随机字符
            for (let i = 0; i < length; i++) {
                // 从字符集中随机取一个字符
                const randomIndex = Math.floor(Math.random() * chars.length);
                result += chars[randomIndex];
            }
            return result;
        };

        const getTagList = () => {
            if (!isLogin.value) {
                goLogin();
                return;
            }
            const content = editorRef.value.innerText;
            ajax("/v2/api/forum/postPublishTags", {
                content,
            }).then((res) => {
                res = res.data;
                if (res.code != 200) return;
                let data = res.data || [];

                // 随机生成一下数据
                for (let i = 0; i < 5; i++) {
                    data.push({
                        title: getRandomChinese() + getRandomChinese(),
                        tagId: generateRandomString(),
                    });
                }

                tagList.value = data;
            });
        };

        const debouncedGetTagList = debounce(getTagList, 500);

        let isBottomState = ref(false); // 底部按钮 显示
        const onEditorFocus = () => {
            isBottomState.value = true;
        };

        const onEditorBlur = () => {
            isBottomState.value = false;
        };

        // 判断是否为空
        const judgeIsEmpty = () => {
            const text = editorRef.value.innerText;
            isEmpty.value = text.length == 0 && !editorRef.value.querySelector("img") && !editorRef.value.querySelector("video");
        };

        // 处理选中文本变化的函数
        const handleSelectionChange = () => {
            const selection = window.getSelection();
            // 确保有选中内容且选中区域在编辑器内
            if (selection.rangeCount > 0) {
                const range = selection.getRangeAt(0);
                // 检查选中区域是否在编辑器内
                const commonAncestor = range.commonAncestorContainer;
                if (editorRef.value.contains(commonAncestor)) {
                    console.log("选中区域在编辑器内", range);
                    lastSelection = range;
                }
            }
        };

        const isPTitle = ref(false);

        const paragraphTitle = () => {
            editorRef.value.focus();
            if (!lastSelection) return;
            const selection = window.getSelection();
            selection.removeAllRanges();
            selection.addRange(lastSelection);

            // 使用try-catch确保即使命令执行失败也能恢复滚动位置
            try {
                document.execCommand("formatBlock", false, isPTitle.value ? "P" : "H2");
            } catch (error) {
                console.error("应用段落格式失败:", error);
            }

            // 更新状态
            setTimeout(() => updatePTitleStatus(), 100);
        };

        const updatePTitleStatus = () => {
            if (lastSelection) {
                let parentElement = lastSelection.commonAncestorContainer;
                // 死循环，直到遇到终止条件
                while (true) {
                    // 如果没有父元素了（到达文档根节点），退出循环返回false
                    if (!parentElement) {
                        isPTitle.value = false;
                        return;
                    }

                    // 遇到id为"editor"的元素，返回false
                    if (parentElement.id === "editor") {
                        isPTitle.value = false;
                        return;
                    }

                    // 遇到nodeName为"H2"的元素，返回true（注意nodeName是大写的）
                    if (parentElement.nodeName === "H2") {
                        isPTitle.value = true;
                        return;
                    }

                    // 继续向上查找父元素
                    parentElement = parentElement.parentElement;
                }
            }
        };

        const cutAnonymity = () => (info.value.anonymous = info.value.anonymous ? 0 : 1);

        let emojiState = ref(false);

        const optionEmoji = ref(["😀", "😁", "😆", "😅", "😂", "😉", "😍", "🥰", "😘", "🤥", "😪", "😵‍💫", "🤓", "🥺", "😋", "😜", "🤪", "😎", "🤩", "🥳", "😔", "🙁", "😭", "😡", "😳", "🤗", "🤔", "🤭", "🤫", "😯", "😵", "🙄", "🥴", "🤢", "🤑", "🤠", "👌", "✌️", "🤟", "🤘", "🤙", "👍", "👎", "✊", "👏", "🤝", "🙏", "💪", "❎️", "✳️", "✴️", "❇️", "#️⃣", "*️⃣", "1️⃣", "2️⃣", "3️⃣", "4️⃣", "5️⃣", "6️⃣", "7️⃣", "8️⃣", "9️⃣", "🔟", "🆗", "🈶", "🉐", "🉑", "🌹", "🥀", "🌸", "🌺", "🌷", "🌲", "☘️", "🍀", "🍁", "🌙", "⭐", "🌍", "☀️", "⭐️", "🌟", "☁️", "🌈", "☂️", "❄️", "☃️", "☄️", "🔥", "💧", "🍎", "🍐", "🍊", "🍉", "🍓", "🍑", "🍔", "🍟", "🍕", "🥪", "🍜", "🍡", "🍨", "🍦", "🎂", "🍰", "🍭", "🍿", "🍩", "🧃", "🍹", "🍒", "🥝", "🥒", "🥦", "🥨", "🌭", "🥘", "🍱", "🍢", "🥮", "🍩", "🍪", "🧁", "🍵", "🍶", "🍻", "🥂", "🧋", "🎉", "🎁", "🧧", "🎃", "🎄", "🧨", "✨️", "🎈", "🎊", "🎋", "🎍", "🎀", "🎖️", "🏆️", "🏅", "💌", "📬", "🚗", "🚕", "🚲", "🛵", "🚀", "🚁", "⛵", "🚢", "🔮", "🧸", "🀄️"]);

        const openEmoji = () => (emojiState.value = true);

        const closeEmoji = () => (emojiState.value = false);

        const selectEmoji = (emoji) => {
            const selection = window.getSelection();
            editorRef.value.focus();
            if (lastSelection) {
                selection.removeAllRanges();
                selection.addRange(lastSelection);
            }
            document.execCommand("insertText", false, emoji);
            closeEmoji();
            judgeIsEmpty();
        };

        let format = ref("");
        const submit = (status) => {
            const infoTarget = { ...info.value } || {};
            let content = editorRef.value.innerHTML;

            const images = extractImages(editorRef.value);
            const videos = extractVideos(editorRef.value);

            infoTarget.attachments = infoTarget.attachments || {};
            infoTarget.attachments.images = images;
            infoTarget.attachments.videos = videos;

            info.value["attachments"] = info.value["attachments"] || {};
            info.value["attachments"]["images"] = images;
            info.value["attachments"]["videos"] = videos;

            console.log(content);
            content = formatContent(content);
            console.log(content);

            const data = {
                ...infoTarget,
                content,
            };

            ajax("/v2/api/forum/postPublishTopic", {
                info: data,
                token: token.value,
                status,
            }).then((res) => {
                const data = res.data;
                if (res.code != 200) {
                    creationAlertBox("error", res.message);
                    return;
                }

                creationAlertBox("success", res.message || "操作成功");
                const back = () => {
                    if (status == 1) redirectToExternalWebsite("/details/" + data.uniqid, "_self");
                    else redirectToExternalWebsite("/", "_self");
                };

                setTimeout(() => back(), 1500);
            });
        };

        const formatContent = (html) => {
            // 1. 替换图片标签
            html = html.replace(/<img[^>]*data-aid="(\d+)"[^>]*>/gi, "[attachimg]$1[/attachimg]");

            // 1.1 替换视频标签
            html = html.replace(/<video[^>]*aid="(\d+)"[^>]*>[\s\S]*?<\/video>/gi, "[attach]$1[/attach]");

            // 2. 替换H2标签
            html = html.replace(/<h2[^>]*>([\s\S]*?)<\/h2>/gi, "[b]$1[/b]");

            // 5. 处理块级标签换行（仅<div>等块级标签前后换行，保持行内内容连续）
            // 块级标签：div、p、h1-h6等，这里以div为例
            html = html.replace(/<\/div>\s*/gi, "</div>\n"); // 闭合div后换行
            html = html.replace(/\s*<div[^>]*>/gi, "\n<div>"); // 开启div前换行

            // 6. 处理<br>为换行
            html = html.replace(/<br\s*\/?>/gi, "\n");

            // 7. 移除所有剩余HTML标签 a标签除外
            html = html.replace(/<(?!(a\b|\/a\b))[^>]+>/gi, "");

            // 8. 清理连续换行（最多保留两个空行，避免过多空行）
            html = html.replace(/\n{3,}/g, "\n\n");
            // 去除首尾空白
            html = html.trim();

            return html;
        };

        const extractImages = (dom) => {
            const images = [];

            // 直接查找页面中所有带 data-aid 的 img 标签
            const imgElements = dom.querySelectorAll("img");

            imgElements.forEach((imgEl) => {
                const url = imgEl.getAttribute("src")?.trim() || "";
                const aid = imgEl.dataset.aid?.trim() || ""; // 用 dataset 简化自定义属性读取

                images.push({
                    url,
                    aid: Number(aid),
                });
            });
            return images;
        };

        const extractVideos = (dom) => {
            // 1. 查找页面中所有 <video> 节点（返回 NodeList 集合）
            const videoElements = dom.querySelectorAll("video");
            const result = [];

            // 2. 遍历每个 video 节点，直接获取属性
            videoElements.forEach((videoEl) => {
                const url = videoEl.getAttribute("src")?.trim() || ""; // 视频地址
                const posterurl = videoEl.getAttribute("poster")?.trim() || ""; // 封面图
                const aid = videoEl.getAttribute("aid")?.trim() || ""; // 视频 ID（自定义属性）
                const posterid = videoEl.getAttribute("posterid")?.trim() || ""; // 封面 ID（自定义属性）

                result.push({
                    aid: Number(aid),
                    posterid: Number(posterid),
                    url,
                    posterurl,
                });
            });

            console.log("提取完成的视频列表：", result);
            return result;
        };

        const handleClick = () => {
            const selection = window.getSelection();

            if (selection.rangeCount > 0) {
                lastSelection = selection.getRangeAt(0);
                // console.log("更新选区");
                updatePTitleStatus();
            }
        };

        let linkUrl = ref("");
        let linkText = ref("");

        let linkState = ref(false);
        const openLink = () => {
            console.log("打开链接");
            const text = lastSelection ? lastSelection.toString().trim() : "";
            console.log("lastSelection", text);
            linkText.value = text;
            linkState.value = true;
        };

        const closeLink = () => {
            console.log("关闭链接");
            linkState.value = false;
            linkText.value = "";
            linkUrl.value = "";
        };

        const insertLink = () => {
            if (linkText.value == "" || linkUrl.value == "") {
                creationAlertBox("error", "请输入链接文字和链接地址");
                return;
            }
            const selection = window.getSelection();
            editorRef.value.focus();
            if (lastSelection) {
                selection.removeAllRanges();
                selection.addRange(lastSelection);
            }
            const html = `<a href="${linkUrl.value}" target="_blank" contenteditable="false">${linkText.value}</a>`;
            document.execCommand("insertHTML", false, html);
            closeLink();
            judgeIsEmpty();
        };

        const uploading = (target, name, type) => {
            return new Promise((resolve, reject) => {
                let config = uConfigData;
                const formData = new FormData();
                formData.append(config.requestName, target); // 文件数据
                formData.append("name", name); // 文件名
                formData.append("type", type); // 文件名
                formData.append("data", config.params.data); // 文件名

                ajax(config.url, formData)
                    .then((res) => {
                        const data = res.data;
                        try {
                            resolve(data);
                        } catch (error) {
                            console.error("插入图片出错:", error);
                        }
                    })
                    .finally(() => {
                        loading.value = false;
                    });
            });
        };

        // 封装：提取视频第一帧（返回 Promise，resolve 第一帧 Blob）
        const getVideoFirstFrame = (videoFile) => {
            return new Promise((resolve, reject) => {
                if (!(videoFile instanceof File) || !videoFile.type.startsWith("video/")) {
                    reject(new Error("请传入合法的视频文件"));
                    return;
                }

                const objectUrl = URL.createObjectURL(videoFile);
                const video = document.createElement("video");
                video.src = objectUrl;
                video.preload = "auto";
                video.muted = true;
                video.playsInline = true;

                const cleanup = () => {
                    URL.revokeObjectURL(objectUrl);
                    video.src = "";
                };

                video.addEventListener(
                    "error",
                    () => {
                        cleanup();
                        reject(new Error("视频加载失败，请检查文件完整性"));
                    },
                    { once: true }
                );

                video.addEventListener(
                    "loadeddata",
                    () => {
                        const canvas = document.createElement("canvas");
                        const w = video.videoWidth || 320;
                        const h = video.videoHeight || 240;
                        canvas.width = w;
                        canvas.height = h;
                        const ctx = canvas.getContext("2d");
                        try {
                            ctx.drawImage(video, 0, 0, w, h);
                        } catch (e) {
                            cleanup();
                            reject(e);
                            return;
                        }
                        canvas.toBlob(
                            (blob) => {
                                cleanup();
                                if (!blob) {
                                    reject(new Error("第一帧提取失败，Blob 生成异常"));
                                    return;
                                }
                                const frameFile = new File([blob], `video_cover_${Date.now()}.png`, { type: "image/png" });
                                resolve(frameFile);
                            },
                            "image/png",
                            0.9
                        );
                    },
                    { once: true }
                );
            });
        };

        const linkClick = () => {};

        return { linkClick, insertVideo, insertLink, linkUrl, linkText, linkState, openLink, closeLink, handleClick, uniqid, userInfoWin, titleLength, submit, emojiState, openEmoji, closeEmoji, selectEmoji, optionEmoji, isPTitle, onEditorInput, onEditorFocus, onEditorBlur, paragraphTitle, info, tagList, token, cutAnonymity, editorRef, insertImage, judgeIsEmpty, isEmpty };
    },
});

editApp.component("headTop", headTop);
editApp.mount("#edit");