declare var window: Window;

export function toDateString(date: Date): string {
    const locale = window.language || (window as any).navigator.userLanguage || window.navigator.language;
    const t12 = document.getElementById("lang-12h") as HTMLInputElement;
    const t24 = document.getElementById("lang-24h") as HTMLInputElement;
    let args1 = {};
    let args2: Intl.DateTimeFormatOptions = {
        hour: "2-digit",
        minute: "2-digit"
    };
    if (t12 && t24) {
        if (t12.checked) {
            args1["hour12"] = true;
            args2["hour12"] = true;
        } else if (t24.checked) {
            args1["hour12"] = false;
            args2["hour12"] = false;
        }
    }
    return date.toLocaleDateString(locale, args1) + " " + date.toLocaleString(locale, args2);
}

export const _get = (url: string, data: Object, onreadystatechange: (req: XMLHttpRequest) => void): void => {
    let req = new XMLHttpRequest();
    if (window.URLBase) { url = window.URLBase + url; }
    req.open("GET", url, true);
    req.responseType = 'json';
    req.setRequestHeader("Authorization", "Bearer " + window.token);
    req.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
    req.onreadystatechange = () => {
        if (req.status == 0) {
            window.notifications.connectionError();
            return;
        } else if (req.status == 401) {
            window.notifications.customError("401Error", window.lang.notif("error401Unauthorized"));
        }
        onreadystatechange(req);
    };
    req.send(JSON.stringify(data));
};

export const _download = (url: string, fname: string): void => {
    let req = new XMLHttpRequest();
    if (window.URLBase) { url = window.URLBase + url; }
    req.open("GET", url, true);
    req.responseType = 'blob';
    req.setRequestHeader("Authorization", "Bearer " + window.token);
    req.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
    req.onload = (e: Event) => {
        let link = document.createElement("a") as HTMLAnchorElement;
        link.href = URL.createObjectURL(req.response);
        link.download = fname;
        link.dispatchEvent(new MouseEvent("click"));
    };
    req.send();
};

export const _post = (url: string, data: Object, onreadystatechange: (req: XMLHttpRequest) => void, response?: boolean, statusHandler?: (req: XMLHttpRequest) => void): void => {
    let req = new XMLHttpRequest();
    req.open("POST", window.URLBase + url, true);
    if (response) {
        req.responseType = 'json';
    }
    req.setRequestHeader("Authorization", "Bearer " + window.token);
    req.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
    req.onreadystatechange = () => {
        if (statusHandler) { statusHandler(req); }
        else if (req.status == 0) {
            window.notifications.connectionError();
            return;
        } else if (req.status == 401) {
            window.notifications.customError("401Error", window.lang.notif("error401Unauthorized"));
        }
        onreadystatechange(req);
    };
    req.send(JSON.stringify(data));
};

export function _delete(url: string, data: Object, onreadystatechange: (req: XMLHttpRequest) => void): void {
    let req = new XMLHttpRequest();
    req.open("DELETE", window.URLBase + url, true);
    req.setRequestHeader("Authorization", "Bearer " + window.token);
    req.setRequestHeader('Content-Type', 'application/json; charset=UTF-8');
    req.onreadystatechange = () => {
        if (req.status == 0) {
            window.notifications.connectionError();
            return;
        } else if (req.status == 401) {
            window.notifications.customError("401Error", window.lang.notif("error401Unauthorized"));
        }
        onreadystatechange(req);
    };
    req.send(JSON.stringify(data));
}

export function toClipboard (str: string) {
    const el = document.createElement('textarea') as HTMLTextAreaElement;
    el.value = str;
    el.readOnly = true;
    el.style.position = "absolute";
    el.style.left = "-9999px";
    document.body.appendChild(el);
    const selected = document.getSelection().rangeCount > 0 ? document.getSelection().getRangeAt(0) : false;
    el.select();
    document.execCommand("copy");
    document.body.removeChild(el);
    if (selected) {
        document.getSelection().removeAllRanges();
        document.getSelection().addRange(selected);
    }
}

export class notificationBox implements NotificationBox {
    private _box: HTMLDivElement;
    private _errorTypes: { [type: string]: boolean } = {};
    private _positiveTypes: { [type: string]: boolean } = {};
    timeout: number;
    constructor(box: HTMLDivElement, timeout?: number) { this._box = box; this.timeout = timeout || 5; }

    private _error = (message: string): HTMLElement => {
        const noti = document.createElement('aside');
        noti.classList.add("aside", "~critical", "@low", "mt-2", "notification-error");
        let error = "";
        if (window.lang) {
            error = window.lang.strings("error") + ":"
        }
        noti.innerHTML = `<strong>${error}</strong> ${message}`;
        const closeButton = document.createElement('span') as HTMLSpanElement;
        closeButton.classList.add("button", "~critical", "@low", "ml-4");
        closeButton.innerHTML = `<i class="icon ri-close-line"></i>`;
        closeButton.onclick = () => this._close(noti);
        noti.classList.add("animate-slide-in");
        noti.appendChild(closeButton);
        return noti;
    }
    
    private _positive = (bold: string, message: string): HTMLElement => {
        const noti = document.createElement('aside');
        noti.classList.add("aside", "~positive", "@low", "mt-2", "notification-positive");
        noti.innerHTML = `<strong>${bold}</strong> ${message}`;
        const closeButton = document.createElement('span') as HTMLSpanElement;
        closeButton.classList.add("button", "~positive", "@low", "ml-4");
        closeButton.innerHTML = `<i class="icon ri-close-line"></i>`;
        closeButton.onclick = () => this._close(noti); 
        noti.classList.add("animate-slide-in");
        noti.appendChild(closeButton);
        return noti;
    }
    
    private _close = (noti: HTMLElement) => {
        noti.classList.remove("animate-slide-in");
        noti.classList.add("animate-slide-out");
        noti.addEventListener(window.animationEvent, () => {
            this._box.removeChild(noti); 
        }, false);
    }

    
    connectionError = () => { this.customError("connectionError", window.lang.notif("errorConnection")); }

    customError = (type: string, message: string) => {
        this._errorTypes[type] = this._errorTypes[type] || false;
        const noti = this._error(message);
        noti.classList.add("error-" + type);
        const previousNoti: HTMLElement | undefined = this._box.querySelector("aside.error-" + type);
        if (this._errorTypes[type] && previousNoti !== undefined && previousNoti != null) {
            this._box.removeChild(previousNoti);
            noti.classList.add("animate-pulse");
            noti.classList.remove("animate-slide-in");
        }
        this._box.appendChild(noti);
        this._errorTypes[type] = true;
        setTimeout(() => { if (this._box.contains(noti)) { this._close(noti); this._errorTypes[type] = false; } }, this.timeout*1000);
    }
    
    customPositive = (type: string, bold: string, message: string) => {
        this._positiveTypes[type] = this._positiveTypes[type] || false;
        const noti = this._positive(bold, message);
        noti.classList.add("positive-" + type);
        const previousNoti: HTMLElement | undefined = this._box.querySelector("aside.positive-" + type);
        if (this._positiveTypes[type] && previousNoti !== undefined && previousNoti != null) {
            this._box.removeChild(previousNoti);
            noti.classList.add("animate-pulse");
            noti.classList.remove("animate-slide-in");
        }
        this._box.appendChild(noti);
        this._positiveTypes[type] = true;
        setTimeout(() => { if (this._box.contains(noti)) { this._close(noti); this._positiveTypes[type] = false; } }, this.timeout*1000);
    }

    customSuccess = (type: string, message: string) => this.customPositive(type, window.lang.strings("success") + ":", message)
}

export const whichAnimationEvent = () => {
    const el = document.createElement("fakeElement");
    if (el.style["animation"] !== void 0) {
        return "animationend";
    }
    return "webkitAnimationEnd";
}

export function toggleLoader(el: HTMLElement, small: boolean = true) {
    if (el.classList.contains("loader")) {
        el.classList.remove("loader");
        el.classList.remove("loader-sm");
        const dot = el.querySelector("span.dot");
        if (dot) { dot.remove(); }
    } else {
        el.classList.add("loader");
        if (small) { el.classList.add("loader-sm"); }
        const dot = document.createElement("span") as HTMLSpanElement;
        dot.classList.add("dot")
        el.appendChild(dot);
    }
}

export function addLoader(el: HTMLElement, small: boolean = true, relative: boolean = false) {
    if (!el.classList.contains("loader")) {
        el.classList.add("loader");
        if (relative) el.classList.add("rel");
        if (small) { el.classList.add("loader-sm"); }
        const dot = document.createElement("span") as HTMLSpanElement;
        dot.classList.add("dot")
        el.appendChild(dot);
    }
}

export function removeLoader(el: HTMLElement, small: boolean = true) {
    if (el.classList.contains("loader")) {
        el.classList.remove("loader");
        el.classList.remove("loader-sm");
        el.classList.remove("rel");
        const dot = el.querySelector("span.dot");
        if (dot) { dot.remove(); }
    }
}

export function insertText(textarea: HTMLTextAreaElement, text: string) {
    // https://kubyshkin.name/posts/insert-text-into-textarea-at-cursor-position <3
    const isSuccess = document.execCommand("insertText", false, text);

    // Firefox (non-standard method)
    if (!isSuccess && typeof textarea.setRangeText === "function") {
        const start = textarea.selectionStart;
        textarea.setRangeText(text);
        // update cursor to be at the end of insertion
        textarea.selectionStart = textarea.selectionEnd = start + text.length;

        // Notify any possible listeners of the change
        const e = document.createEvent("UIEvent");
        e.initEvent("input", true, false);
        textarea.dispatchEvent(e);
        textarea.focus();
    }
}