import {InlineDisplayMode, InlineImage} from '../interfaces';
import * as Utils from '../site/utils';
import {CoreBBCodeParser} from './core';
import {BBCodeCustomTag, BBCodeSimpleTag, BBCodeTextTag} from './parser';

const usernameRegex = /^[a-zA-Z0-9_\-\s]+$/;

export class StandardBBCodeParser extends CoreBBCodeParser {
    inlines: {[key: string]: InlineImage | undefined} | undefined;

    createInline(inline: InlineImage): HTMLElement {
        const p1 = inline.hash.substr(0, 2);
        const p2 = inline.hash.substr(2, 2);
        const outerEl = this.createElement('div');
        const el = this.createElement('img');
        el.className = 'inline-image';
        el.title = el.alt = inline.name;
        el.src = `${Utils.staticDomain}images/charinline/${p1}/${p2}/${inline.hash}.${inline.extension}`;
        outerEl.appendChild(el);
        return outerEl;
    }

    constructor() {
        super();
        const hrTag = new BBCodeSimpleTag('hr', 'hr', [], []);
        hrTag.noClosingTag = true;
        this.addTag(hrTag);
        this.addTag(new BBCodeCustomTag('quote', (parser, parent, param) => {
            if(param !== '')
                parser.warning('Unexpected paramter on quote tag.');
            const element = parser.createElement('blockquote');
            const innerElement = parser.createElement('div');
            innerElement.className = 'quoteHeader';
            innerElement.appendChild(document.createTextNode('Quote:'));
            element.appendChild(innerElement);
            parent.appendChild(element);
            return element;
        }));
        this.addTag(new BBCodeSimpleTag('left', 'span', ['leftText']));
        this.addTag(new BBCodeSimpleTag('right', 'span', ['rightText']));
        this.addTag(new BBCodeSimpleTag('center', 'span', ['centerText']));
        this.addTag(new BBCodeSimpleTag('justify', 'span', ['justifyText']));
        this.addTag(new BBCodeSimpleTag('big', 'span', ['bigText'], ['url', 'i', 'u', 'b', 'color', 's']));
        this.addTag(new BBCodeSimpleTag('small', 'span', ['smallText'], ['url', 'i', 'u', 'b', 'color', 's']));
        this.addTag(new BBCodeSimpleTag('indent', 'div', ['indentText']));
        this.addTag(new BBCodeSimpleTag('heading', 'h2', [], ['url', 'i', 'u', 'b', 'color', 's']));
        this.addTag(new BBCodeSimpleTag('row', 'div', ['row']));
        this.addTag(new BBCodeCustomTag('col', (parser, parent, param) => {
            const col = parser.createElement('div');
            col.className = param === '1' ? 'col-lg-3 col-md-4 col-12' : param === '2' ? 'col-lg-4 col-md-6 col-12' :
                param === '3' ? 'col-lg-6 col-md-8 col-12' : 'col-md';
            parent.appendChild(col);
            return col;
        }));
        this.addTag(new BBCodeCustomTag('collapse', (parser, parent, param) => {
            if(param === '') { //tslint:disable-line:curly
                parser.warning('title parameter is required.');
                // HACK: Compatability fix with old site. Titles are not trimmed on old site, so empty collapse titles need to be allowed.
                //return null;
            }
            const outer = parser.createElement('div');
            outer.className = 'card bg-light bbcode-collapse';
            const headerText = parser.createElement('div');
            headerText.className = 'card-header bbcode-collapse-header';
            const icon = parser.createElement('i');
            icon.className = 'fas fa-chevron-down';
            icon.style.marginRight = '10px';
            headerText.appendChild(icon);
            headerText.appendChild(document.createTextNode(param));
            outer.appendChild(headerText);
            const body = parser.createElement('div');
            body.className = 'bbcode-collapse-body';
            body.style.height = '0';
            outer.appendChild(body);
            const inner = parser.createElement('div');
            inner.className = 'card-body';
            body.appendChild(inner);
            let timeout: number;
            headerText.addEventListener('click', () => {
                const isCollapsed = parseInt(body.style.height!, 10) === 0;
                if(isCollapsed) timeout = window.setTimeout(() => body.style.height = '', 200);
                else {
                    clearTimeout(timeout);
                    body.style.transition = 'initial';
                    setImmediate(() => {
                        body.style.transition = '';
                        body.style.height = '0';
                    });
                }
                body.style.height = `${body.scrollHeight}px`;
                icon.className = `fas fa-chevron-${isCollapsed ? 'up' : 'down'}`;
            });
            parent.appendChild(outer);
            return inner;
        }));
        this.addTag(new BBCodeTextTag('user', (parser, parent, param, content) => {
            if(param !== '')
                parser.warning('Unexpected parameter on user tag.');
            if(!usernameRegex.test(content))
                return;
            const a = parser.createElement('a');
            a.href = `${Utils.siteDomain}c/${content}`;
            a.target = '_blank';
            a.className = 'character-link';
            a.appendChild(document.createTextNode(content));
            parent.appendChild(a);
            return a;
        }));
        this.addTag(new BBCodeTextTag('icon', (parser, parent, param, content) => {
            if(param !== '')
                parser.warning('Unexpected parameter on icon tag.');
            if(!usernameRegex.test(content))
                return;
            const a = parser.createElement('a');
            a.href = `${Utils.siteDomain}c/${content}`;
            a.target = '_blank';
            const img = parser.createElement('img');
            img.src = `${Utils.staticDomain}images/avatar/${content.toLowerCase()}.png`;
            img.className = 'character-avatar icon';
            img.title = img.alt = content;
            a.appendChild(img);
            parent.appendChild(a);
            return a;
        }));
        this.addTag(new BBCodeTextTag('eicon', (parser, parent, param, content) => {
            if(param !== '')
                parser.warning('Unexpected parameter on eicon tag.');

            if(!usernameRegex.test(content))
                return;
            let extension = '.gif';
            if(!Utils.settings.animateEicons)
                extension = '.png';
            const img = parser.createElement('img');
            img.src = `${Utils.staticDomain}images/eicon/${content.toLowerCase()}${extension}`;
            img.className = 'character-avatar icon';
            img.title = img.alt = content;
            parent.appendChild(img);
            return img;
        }));
        this.addTag(new BBCodeTextTag('img', (p, parent, param, content) => {
            const parser = <StandardBBCodeParser>p;
            if(typeof parser.inlines === 'undefined') {
                parser.warning('This page does not support inline images.');
                return undefined;
            }
            const displayMode = Utils.settings.inlineDisplayMode;
            if(!/^\d+$/.test(param)) {
                parser.warning('img tag parameters must be numbers.');
                return undefined;
            }
            const inline = parser.inlines[param];
            if(typeof inline !== 'object') {
                parser.warning(`Could not find an inline image with id ${param} It will not be visible.`);
                return undefined;
            }
            inline.name = content;
            let element: HTMLElement;
            if(displayMode === InlineDisplayMode.DISPLAY_NONE || (displayMode === InlineDisplayMode.DISPLAY_SFW && inline.nsfw)) {
                const el = element = parser.createElement('a');
                el.className = 'unloadedInline';
                el.href = '#';
                el.dataset.inlineId = param;
                el.onclick = () => {
                    (<HTMLElement[]>Array.prototype.slice.call(document.getElementsByClassName('unloadedInline'))).forEach((e) => {
                        const showInline = parser.inlines![e.dataset.inlineId!];
                        if(typeof showInline !== 'object') return;
                        e.parentElement!.replaceChild(parser.createInline(showInline), e);
                    });
                    return false;
                };
                const prefix = inline.nsfw ? '[NSFW Inline] ' : '[Inline] ';
                el.appendChild(document.createTextNode(prefix));
                parent.appendChild(el);
            } else parent.appendChild(element = parser.createInline(inline));
            return element;
        }));
    }
}