import {focusByRange} from "./selection";
import {fetchPost, fetchSyncPost} from "../../util/fetch";
import {Constants} from "../../constants";
/// #if !BROWSER
import {clipboard, ipcRenderer} from "electron";
import {processSYLink} from "../../editor/openLink";
/// #endif

export const encodeBase64 = (text: string): string => {
    if (typeof Buffer !== "undefined") {
        return Buffer.from(text, "utf8").toString("base64");
    } else {
        const encoder = new TextEncoder();
        const bytes = encoder.encode(text);
        let binary = "";
        const chunkSize = 0x8000; // 避免栈溢出

        for (let i = 0; i < bytes.length; i += chunkSize) {
            const chunk = bytes.subarray(i, Math.min(i + chunkSize, bytes.length));
            binary += String.fromCharCode(...chunk);
        }

        return btoa(binary);
    }
};

export const getTextSiyuanFromTextHTML = (html: string) => {
    const siyuanMatch = html.match(/<!--data-siyuan='([^']+)'-->/);
    let textSiyuan = "";
    let textHtml = html;
    if (siyuanMatch) {
        try {
            if (typeof Buffer !== "undefined") {
                const decodedBytes = Buffer.from(siyuanMatch[1], "base64");
                textSiyuan = decodedBytes.toString("utf8");
            } else {
                const decoder = new TextDecoder();
                const bytes = Uint8Array.from(atob(siyuanMatch[1]), char => char.charCodeAt(0));
                textSiyuan = decoder.decode(bytes);
            }
            // 移除注释节点，保持原有的 text/html 内容
            textHtml = html.replace(/<!--data-siyuan='[^']+'-->/, "");
        } catch (e) {
            console.log("Failed to decode siyuan data from HTML comment:", e);
        }
    }
    return {
        textSiyuan,
        textHtml
    };
};

export const openByMobile = (uri: string) => {
    if (!uri) {
        return;
    }
    //https://github.com/siyuan-note/siyuan/issues/15892
    if (processSYLink(window.siyuan.ws.app, uri)) {
        return;
    }
    if (isInIOS()) {
        if (uri.startsWith("assets/")) {
            // iOS 16.7 之前的版本，uri 需要 encodeURIComponent
            window.webkit.messageHandlers.openLink.postMessage(location.origin + "/assets/" + encodeURIComponent(uri.replace("assets/", "")));
        } else if (uri.startsWith("/")) {
            // 导出 zip 返回的是已经 encode 过的，因此不能再 encode
            window.webkit.messageHandlers.openLink.postMessage(location.origin + uri);
        } else {
            try {
                new URL(uri);
                window.webkit.messageHandlers.openLink.postMessage(uri);
            } catch (e) {
                window.webkit.messageHandlers.openLink.postMessage("https://" + uri);
            }
        }
    } else if (isInAndroid()) {
        window.JSAndroid.openExternal(uri);
    } else if (isInHarmony()) {
        window.JSHarmony.openExternal(uri);
    } else {
        window.open(uri);
    }
};

export const exportByMobile = (uri: string) => {
    if (!uri) {
        return;
    }
    if (isInIOS()) {
        openByMobile(uri);
    } else if (isInAndroid()) {
        window.JSAndroid.exportByDefault(uri);
    } else if (isInHarmony()) {
        window.JSHarmony.exportByDefault(uri);
    } else {
        window.open(uri);
    }
};

export const readText = () => {
    if (isInAndroid()) {
        return window.JSAndroid.readClipboard();
    } else if (isInHarmony()) {
        return window.JSHarmony.readClipboard();
    }
    if (typeof navigator.clipboard === "undefined") {
        alert(window.siyuan.languages.clipboardPermissionDenied);
        return "";
    }
    return navigator.clipboard.readText().catch(() => {
        alert(window.siyuan.languages.clipboardPermissionDenied);
    }) || "";
};

/// #if !BROWSER
export const getLocalFiles = async () => {
    // 不再支持 PC 浏览器 https://github.com/siyuan-note/siyuan/issues/7206
    let localFiles: string[] = [];
    if ("darwin" === window.siyuan.config.system.os) {
        const xmlString = clipboard.read("NSFilenamesPboardType");
        const domParser = new DOMParser();
        const xmlDom = domParser.parseFromString(xmlString, "application/xml");
        Array.from(xmlDom.getElementsByTagName("string")).forEach(item => {
            localFiles.push(item.childNodes[0].nodeValue);
        });
    } else {
        const xmlString = await fetchSyncPost("/api/clipboard/readFilePaths", {});
        if (xmlString.data.length > 0) {
            localFiles = xmlString.data;
        }
    }
    return localFiles;
};
/// #endif

export const readClipboard = async () => {
    const text: IClipboardData = {textPlain: "", textHTML: "", siyuanHTML: ""};
    if (isInAndroid()) {
        text.textPlain = window.JSAndroid.readClipboard();
        text.textHTML = window.JSAndroid.readHTMLClipboard();
        const textObj = getTextSiyuanFromTextHTML(text.textHTML);
        text.textHTML = textObj.textHtml;
        text.siyuanHTML = textObj.textSiyuan;
        return text;
    }
    if (isInHarmony()) {
        text.textPlain = window.JSHarmony.readClipboard();
        text.textHTML = window.JSHarmony.readHTMLClipboard();
        const textObj = getTextSiyuanFromTextHTML(text.textHTML);
        text.textHTML = textObj.textHtml;
        text.siyuanHTML = textObj.textSiyuan;
        return text;
    }
    if (typeof navigator.clipboard === "undefined") {
        alert(window.siyuan.languages.clipboardPermissionDenied);
        return text;
    }
    try {
        const clipboardContents = await navigator.clipboard.read().catch(() => {
            alert(window.siyuan.languages.clipboardPermissionDenied);
        });
        if (!clipboardContents) {
            return text;
        }
        for (const item of clipboardContents) {
            if (item.types.includes("text/html")) {
                const blob = await item.getType("text/html");
                text.textHTML = await blob.text();
                const textObj = getTextSiyuanFromTextHTML(text.textHTML);
                text.textHTML = textObj.textHtml;
                text.siyuanHTML = textObj.textSiyuan;
            }
            if (item.types.includes("text/plain")) {
                const blob = await item.getType("text/plain");
                text.textPlain = await blob.text();
            }
            if (item.types.includes("image/png")) {
                const blob = await item.getType("image/png");
                text.files = [new File([blob], "image.png", {type: "image/png", lastModified: Date.now()})];
            }
        }
        /// #if !BROWSER
        if (!text.textHTML && !text.files) {
            text.localFiles = await getLocalFiles();
        }
        /// #endif
        return text;
    } catch (e) {
        return text;
    }
};

export const writeText = (text: string) => {
    let range: Range;
    if (getSelection().rangeCount > 0) {
        range = getSelection().getRangeAt(0).cloneRange();
    }
    try {
        // navigator.clipboard.writeText 抛出异常不进入 catch，这里需要先处理移动端复制
        if (isInAndroid()) {
            window.JSAndroid.writeClipboard(text);
            return;
        }
        if (isInHarmony()) {
            window.JSHarmony.writeClipboard(text);
            return;
        }
        if (isInIOS()) {
            window.webkit.messageHandlers.setClipboard.postMessage(text);
            return;
        }
        navigator.clipboard.writeText(text);
    } catch (e) {
        if (isInIOS()) {
            window.webkit.messageHandlers.setClipboard.postMessage(text);
        } else if (isInAndroid()) {
            window.JSAndroid.writeClipboard(text);
        } else if (isInHarmony()) {
            window.JSHarmony.writeClipboard(text);
        } else {
            const textElement = document.createElement("textarea");
            textElement.value = text;
            textElement.style.position = "fixed";  //avoid scrolling to bottom
            document.body.appendChild(textElement);
            textElement.focus();
            textElement.select();
            document.execCommand("copy");
            document.body.removeChild(textElement);
            if (range) {
                focusByRange(range);
            }
        }
    }
};

export const copyPlainText = async (text: string) => {
    text = text.replace(new RegExp(Constants.ZWSP, "g"), ""); // `复制纯文本` 时移除所有零宽空格 https://github.com/siyuan-note/siyuan/issues/6674
    await writeText(text);
};

// 用户 iPhone 点击延迟/需要双击的处理
export const getEventName = () => {
    if (isIPhone()) {
        return "touchstart";
    } else {
        return "click";
    }
};

export const isOnlyMeta = (event: KeyboardEvent | MouseEvent) => {
    if (isMac()) {
        // mac
        if (event.metaKey && !event.ctrlKey) {
            return true;
        }
        return false;
    } else {
        if (!event.metaKey && event.ctrlKey) {
            return true;
        }
        return false;
    }
};

export const isNotCtrl = (event: KeyboardEvent | MouseEvent) => {
    if (!event.metaKey && !event.ctrlKey) {
        return true;
    }
    return false;
};

export const isHuawei = () => {
    return window.siyuan.config.system.osPlatform.toLowerCase().indexOf("huawei") > -1;
};

export const isDisabledFeature = (feature: string): boolean => {
    return window.siyuan.config.system.disabledFeatures?.indexOf(feature) > -1;
};

export const isIPhone = () => {
    return navigator.userAgent.indexOf("iPhone") > -1;
};

export const isSafari = () => {
    const userAgent = navigator.userAgent;
    return userAgent.includes("Safari") && !userAgent.includes("Chrome") && !userAgent.includes("Chromium");
};

export const isIPad = () => {
    return navigator.userAgent.indexOf("iPad") > -1;
};

export const isMac = () => {
    return navigator.platform.toUpperCase().indexOf("MAC") > -1;
};

export const isWin11 = async () => {
    if (!(navigator as any).userAgentData || !(navigator as any).userAgentData.getHighEntropyValues) {
        return false;
    }
    const ua = await (navigator as any).userAgentData.getHighEntropyValues(["platformVersion"]);
    if ((navigator as any).userAgentData.platform === "Windows") {
        if (parseInt(ua.platformVersion.split(".")[0]) >= 13) {
            return true;
        }
    }
    return false;
};

export const getScreenWidth = () => {
    if (isInAndroid()) {
        return window.JSAndroid.getScreenWidthPx();
    } else if (isInHarmony()) {
        return window.JSHarmony.getScreenWidthPx();
    }
    return window.outerWidth;
};

export const isWindows = () => {
    return navigator.platform.toUpperCase().indexOf("WIN") > -1;
};

export const isInAndroid = () => {
    return window.siyuan.config.system.container === "android" && window.JSAndroid;
};

export const isInIOS = () => {
    return window.siyuan.config.system.container === "ios" && window.webkit?.messageHandlers;
};

export const isInHarmony = () => {
    return window.siyuan.config.system.container === "harmony" && window.JSHarmony;
};

export const updateHotkeyAfterTip = (hotkey: string, split = " ") => {
    if (hotkey) {
        return split + updateHotkeyTip(hotkey);
    }
    return "";
};

// Mac，Windows 快捷键展示
export const updateHotkeyTip = (hotkey: string) => {
    if (!hotkey || isMac()) {
        return hotkey;
    }
    const keys = [];
    if ((hotkey.indexOf("⌘") > -1 || hotkey.indexOf("⌃") > -1)) keys.push("Ctrl");
    if (hotkey.indexOf("⇧") > -1) keys.push("Shift");
    if (hotkey.indexOf("⌥") > -1) keys.push("Alt");

    // 不能去最后一个，需匹配 F2
    const lastKey = hotkey.replace(/[⌘⇧⌥⌃]/g, "");
    if (lastKey) {
        keys.push({
            "⇥": "Tab",
            "⌫": "Backspace",
            "⌦": "Delete",
            "↩": "Enter"
        }[lastKey] || lastKey);
    }
    return keys.join("+");
};

export const getLocalStorage = (cb: () => void) => {
    fetchPost("/api/storage/getLocalStorage", undefined, (response) => {
        window.siyuan.storage = response.data;
        // 历史数据迁移
        const defaultStorage: any = {};
        defaultStorage[Constants.LOCAL_SEARCHASSET] = {
            keys: [],
            col: "",
            row: "",
            layout: 0,
            method: 0,
            types: {},
            sort: 0,
            k: "",
        };
        defaultStorage[Constants.LOCAL_SEARCHUNREF] = {
            col: "",
            row: "",
            layout: 0,
        };
        Constants.SIYUAN_ASSETS_SEARCH.forEach(type => {
            defaultStorage[Constants.LOCAL_SEARCHASSET].types[type] = true;
        });
        defaultStorage[Constants.LOCAL_SEARCHKEYS] = {
            keys: [],
            replaceKeys: [],
            col: "",
            row: "",
            layout: 0,
            colTab: "",
            rowTab: "",
            layoutTab: 0
        };
        defaultStorage[Constants.LOCAL_PDFTHEME] = {
            light: "light",
            dark: "dark",
            annoColor: "var(--b3-pdf-background1)"
        };
        defaultStorage[Constants.LOCAL_LAYOUTS] = [];   // {name: "", layout:{}, time: number, filespaths: IFilesPath[]}
        defaultStorage[Constants.LOCAL_AI] = [];   // {name: "", memo: ""}
        defaultStorage[Constants.LOCAL_PLUGIN_DOCKS] = {};  // { pluginName: {dockId: IPluginDockTab}}
        defaultStorage[Constants.LOCAL_PLUGINTOPUNPIN] = [];
        defaultStorage[Constants.LOCAL_OUTLINE] = {keepCurrentExpand: false};
        defaultStorage[Constants.LOCAL_FILEPOSITION] = {}; // {id: IScrollAttr}
        defaultStorage[Constants.LOCAL_DIALOGPOSITION] = {}; // {id: IPosition}
        defaultStorage[Constants.LOCAL_HISTORY] = {
            notebookId: "%",
            type: 0,
            operation: "all",
            sideWidth: "256px",
            sideDocWidth: "256px",
            sideDiffWidth: "256px",
        };
        defaultStorage[Constants.LOCAL_FLASHCARD] = {
            fullscreen: false
        };
        defaultStorage[Constants.LOCAL_BAZAAR] = {
            theme: "0",
            template: "0",
            icon: "0",
            widget: "0",
        };
        defaultStorage[Constants.LOCAL_EXPORTWORD] = {removeAssets: false, mergeSubdocs: false};
        defaultStorage[Constants.LOCAL_EXPORTPDF] = {
            landscape: false,
            marginType: "0",
            scale: 1,
            pageSize: "A4",
            removeAssets: true,
            keepFold: false,
            mergeSubdocs: false,
            watermark: false
        };
        defaultStorage[Constants.LOCAL_EXPORTIMG] = {
            keepFold: false,
            watermark: false
        };
        defaultStorage[Constants.LOCAL_DOCINFO] = {
            id: "",
        };
        defaultStorage[Constants.LOCAL_IMAGES] = {
            file: "1f4c4",
            note: "1f5c3",
            folder: "1f4d1"
        };
        defaultStorage[Constants.LOCAL_EMOJIS] = {
            currentTab: "emoji"
        };
        defaultStorage[Constants.LOCAL_FONTSTYLES] = [];
        defaultStorage[Constants.LOCAL_FILESPATHS] = [];    // IFilesPath[]
        defaultStorage[Constants.LOCAL_SEARCHDATA] = {
            page: 1,
            sort: 0,
            group: 0,
            hasReplace: false,
            method: 0,
            hPath: "",
            idPath: [],
            k: "",
            r: "",
            types: {
                document: window.siyuan.config.search.document,
                heading: window.siyuan.config.search.heading,
                list: window.siyuan.config.search.list,
                listItem: window.siyuan.config.search.listItem,
                codeBlock: window.siyuan.config.search.codeBlock,
                htmlBlock: window.siyuan.config.search.htmlBlock,
                mathBlock: window.siyuan.config.search.mathBlock,
                table: window.siyuan.config.search.table,
                blockquote: window.siyuan.config.search.blockquote,
                superBlock: window.siyuan.config.search.superBlock,
                paragraph: window.siyuan.config.search.paragraph,
                embedBlock: window.siyuan.config.search.embedBlock,
                databaseBlock: window.siyuan.config.search.databaseBlock,
            },
            replaceTypes: Object.assign({}, Constants.SIYUAN_DEFAULT_REPLACETYPES),
        };
        defaultStorage[Constants.LOCAL_ZOOM] = 1;
        defaultStorage[Constants.LOCAL_MOVE_PATH] = {keys: [], k: ""};
        defaultStorage[Constants.LOCAL_RECENT_DOCS] = {type: "viewedAt"};   // TRecentDocsSort

        [Constants.LOCAL_EXPORTIMG, Constants.LOCAL_SEARCHKEYS, Constants.LOCAL_PDFTHEME, Constants.LOCAL_BAZAAR,
            Constants.LOCAL_EXPORTWORD, Constants.LOCAL_EXPORTPDF, Constants.LOCAL_DOCINFO, Constants.LOCAL_FONTSTYLES,
            Constants.LOCAL_SEARCHDATA, Constants.LOCAL_ZOOM, Constants.LOCAL_LAYOUTS, Constants.LOCAL_AI,
            Constants.LOCAL_PLUGINTOPUNPIN, Constants.LOCAL_SEARCHASSET, Constants.LOCAL_FLASHCARD,
            Constants.LOCAL_DIALOGPOSITION, Constants.LOCAL_SEARCHUNREF, Constants.LOCAL_HISTORY,
            Constants.LOCAL_OUTLINE, Constants.LOCAL_FILEPOSITION, Constants.LOCAL_FILESPATHS, Constants.LOCAL_IMAGES,
            Constants.LOCAL_PLUGIN_DOCKS, Constants.LOCAL_EMOJIS, Constants.LOCAL_MOVE_PATH, Constants.LOCAL_RECENT_DOCS].forEach((key) => {
            if (typeof response.data[key] === "string") {
                try {
                    const parseData = JSON.parse(response.data[key]);
                    if (typeof parseData === "number") {
                        // https://github.com/siyuan-note/siyuan/issues/8852 Object.assign 会导致 number to Number
                        window.siyuan.storage[key] = parseData;
                    } else {
                        window.siyuan.storage[key] = Object.assign(defaultStorage[key], parseData);
                    }
                } catch (e) {
                    window.siyuan.storage[key] = defaultStorage[key];
                }
            } else if (typeof response.data[key] === "undefined") {
                window.siyuan.storage[key] = defaultStorage[key];
            }
        });
        // 搜索数据添加 replaceTypes 兼容
        if (!window.siyuan.storage[Constants.LOCAL_SEARCHDATA].replaceTypes ||
            Object.keys(window.siyuan.storage[Constants.LOCAL_SEARCHDATA].replaceTypes).length === 0) {
            window.siyuan.storage[Constants.LOCAL_SEARCHDATA].replaceTypes = Object.assign({}, Constants.SIYUAN_DEFAULT_REPLACETYPES);
        }
        cb();
    });
};

export const setStorageVal = (key: string, val: any, cb?: () => void) => {
    if (window.siyuan.config.readonly || window.siyuan.isPublish) {
        return;
    }
    fetchPost("/api/storage/setLocalStorageVal", {
        app: Constants.SIYUAN_APPID,
        key,
        val,
    }, () => {
        if (cb) {
            cb();
        }
    });
};

/// #if !BROWSER
export const initFocusFix = () => {
    if (!isWindows()) {
        return;
    }
    const originalAlert = window.alert;
    const originalConfirm = window.confirm;
    const fixFocusAfterDialog = () => {
        ipcRenderer.send("siyuan-focus-fix");
    };
    window.alert = function (message: string) {
        try {
            const result = originalAlert.call(this, message);
            fixFocusAfterDialog();
            return result;
        } catch (error) {
            console.error("alert error:", error);
            fixFocusAfterDialog();
            return undefined;
        }
    };
    window.confirm = function (message: string) {
        try {
            const result = originalConfirm.call(this, message);
            fixFocusAfterDialog();
            return result;
        } catch (error) {
            console.error("confirm error:", error);
            fixFocusAfterDialog();
            return false;
        }
    };
};
/// #endif