import { createElement } from '@wordpress/element';
import { camelCaseAttrMap } from  "./camel-case-attribute-names";

// eslint-disable-next-line max-len
// https://github.com/facebook/react/blob/15.0-stable/src/renderers/dom/shared/ReactDOMComponent.js#L457
const voidElementTags = [
'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr', 'menuitem', 'textarea'
];

// Render block on editor
export function pagelayerParseHtmlToReact(html, props){
	
	var reactEle = '';
	var data = [];
	
	const createElementArray = (node) => {
		
		node = jQuery(node)[0];
		
		if(node.nodeType === 3) {
			return node.data;
		}else if(node.nodeType === 8) {
			
			// FIXME: The following doesn't work as the generated HTML results in
			// "<!--  This is a comment  -->"
			// return '<!-- ' + node.data + ' -->';
			return '';
		}
		
		var localName = node.localName;
	
		// If we start typing like "<s" is changed to "<s< ="" div></s<>", so we replace "<" from tag name
		localName = localName.replace(/[^\w-]/g, '');
		
		if(voidElementTags.indexOf(localName) > -1){
			return pagelayer_createElement(node, props);
		}
		
		var data = '';
		var children = [];
		
		if(jQuery(node).children().length > 0){
			var cn = node.childNodes,
			i = 0;

			while(cn.length > i) {
				children.push(createElementArray(cn[i]));
				i += 1;
			}
			
		}else{
			data = node.innerText;
		}
		
		return pagelayer_createElement(node, props, data, children);
	}
	
	jQuery(html).each(function(){
		data.push( createElementArray(this) );
	});
		
	return data;
}

export function pagelayer_createElement(node, props, data, children){
		
	let elementProps = {};
	let isRichText = false;
	let isGroupHolder = false;
	var localName = node.localName;
	
	// If we start typing like "<s" is changed to "<s< ="" div></s<>", so we replace "<" from tag name
	localName = localName.replace(/[^\w-]/g, '');
	children = children || [];
	
	if(node.attributes){
		
		elementProps = Object.entries(node.attributes).reduce((result, [key, value]) => {
			var name = value.nodeName;
			var val = value.nodeValue;
			
			name = camelCaseAttrMap[name.replace(/[-:]/, '')] || name;
			
			if (name === 'style') {
				val = createStyleJsonFromString(val);
			} else if (name === 'class') {
				name = 'className';
			} else if (name === 'for') {
				name = 'htmlFor';
			} else if (name.startsWith('on')) {
				val = Function(val);
			} else if(name === 'pagelayer-editable'){
				isRichText = val;
			} else if(name === 'pagelayer-group-holder'){
				isGroupHolder = val;
			}

			if (booleanAttrs.includes(name) && (val || '') === '') {
				val = name;
			}

			result[name] = val;
			
			return result;
			
		}, elementProps);
	}
	
	// TODO: also pass el.atts
	if(isRichText){
		var eleProps = {
			tagName: localName,
			_props: props,
			propsName: isRichText,
			value: node.innerHTML
		}
		
		elementProps = {...elementProps, ...eleProps};
		return createElement(wp.PagelayerComponents['rich_text'], elementProps);
	}
	
	if(isGroupHolder){
		
		var eleProps = {
			TagName: localName,
			plTag: isGroupHolder,
			_props: props,
		};
		
		elementProps = {...elementProps, ...eleProps};
		var RenderGroupBlock = wp.PagelayerBlocks['addGroupBlock'];
		
		return createElement(RenderGroupBlock, elementProps);
	}
	
	const allChildren = data != null ? [data,].concat(children) : children;
	
	return createElement.apply( null, [localName, elementProps].concat(allChildren) );
}

// Boolean HTML attributes, copied from https://meiert.com/en/blog/boolean-attributes-of-html/,
// on the form React expects.
const booleanAttrs = [
	'allowFullScreen',
	'allowpaymentrequest',
	'async',
	'autoFocus',
	'autoPlay',
	'checked',
	'controls',
	'default',
	'disabled',
	'formNoValidate',
	'hidden',
	'ismap',
	'itemScope',
	'loop',
	'multiple',
	'muted',
	'nomodule',
	'noValidate',
	'open',
	'playsinline',
	'readOnly',
	'required',
	'reversed',
	'selected',
	'truespeed',
];

export function createStyleJsonFromString(styleString){
	
	styleString = styleString || '';
	const styles = styleString.split(/;(?!base64)/);
	var jsonStyles = {};
	
	for(let i = 0; i < styles.length; ++i){
		
		let singleStyle, key, value;
		singleStyle = styles[i].split(':');
		if (singleStyle.length > 2) {
			singleStyle[1] = singleStyle.slice(1).join(':');
		}

		key = singleStyle[0];
		value = singleStyle[1];
		
		if (typeof value === 'string'){
			value = value.trim();
		}

		if (key != null && value != null && key.length > 0 && value.length > 0) {
			
			// There are two ways to declare css keys in react first is lower case string and second is camel case
			// key = key.toLowerCase(); // This is first way
			
			// We use camel case way to create css
			// Don't camelCase CSS custom properties
			if(key.indexOf('--') !== 0) {
				key = key
					.trim()
					.split('-')
					.map((word, index) => {
						if (index === 0) {
							return word;
						}
						return word.charAt(0).toUpperCase() + word.slice(1);
					})
					.join('');
			}
				
			jsonStyles[key] = value;
		}
	}
	
	return jsonStyles;
}