/* global vc, i18nLocale */
if ( !window.vc ) {
	window.vc = {};
}

( function ( $ ) {
	'use strict';

	var storagePrefix = 'results';
	var maxTitleLength = 600;
	var utils = vc.seo_utils;

	var checkData = {
		focusKeyphrase: {
			title: i18nLocale.focusKeywordTitle,
			checkMethod: 'checkFocusKeyphrase',
			conditions: []
		},
		descriptionLength: {
			title: i18nLocale.seoDescription,
			checkMethod: 'checkDescriptionLength',
			conditions: []
		},
		titleWidth: {
			title: i18nLocale.seoTitle,
			checkMethod: 'checkTitleWidth',
			conditions: []
		},
		postTextLength: {
			title: i18nLocale.textLength,
			checkMethod: 'checkPostTextLength',
			conditions: []
		},
		images: {
			title: i18nLocale.images,
			checkMethod: 'checkImages',
			conditions: [ 'content' ]
		},
		inboundLinks: {
			title: i18nLocale.internalLinks,
			checkMethod: 'checkInboundLinks',
			conditions: [ 'content' ]
		},
		outboundLinks: {
			title: i18nLocale.outboundLinks,
			checkMethod: 'checkOutboundLinks',
			conditions: [ 'content' ]
		},
		consecutiveSentences: {
			title: i18nLocale.consecutiveSentences,
			checkMethod: 'checkForConsecutiveSentences',
			conditions: [ 'text', 'content' ]
		},
		subheadingDistribution: {
			title: i18nLocale.subheadingDistribution,
			checkMethod: 'checkSubheadingDistribution',
			conditions: [ 'text', 'content' ]
		},
		paragraphLength: {
			title: i18nLocale.paragraphLength,
			checkMethod: 'checkParagraphLength',
			conditions: [ 'text', 'content' ]
		},
		passiveVoicePercentage: {
			title: i18nLocale.passiveVoice,
			checkMethod: 'checkPassiveVoicePercentage',
			conditions: [ 'text', 'content' ]
		},
		checkSentenceLength: {
			title: i18nLocale.sentenceLength,
			checkMethod: 'checkSentenceLength',
			conditions: [ 'text', 'content' ]
		},
		keyphraseInTitle: {
			title: i18nLocale.keyphraseInTitleText,
			checkMethod: 'checkKeyphraseInTitle',
			conditions: [ 'title', 'keyphrase' ]
		},
		keyphraseInDescription: {
			title: i18nLocale.keyphraseInDescriptionText,
			checkMethod: 'checkKeyphraseInDescription',
			conditions: [ 'description', 'keyphrase' ]
		},
		keyphraseInSlug: {
			title: i18nLocale.keyphraseInSlug,
			checkMethod: 'checkKeyphraseInSlug',
			conditions: [ 'slug', 'keyphrase' ]
		},
		keyphraseInImages: {
			title: i18nLocale.imageKeyphrase,
			checkMethod: 'checkKeyphraseInImages',
			conditions: [ 'content', 'keyphrase', 'images' ]
		},
		keyphraseDensity: {
			title: i18nLocale.keyphraseDensity,
			checkMethod: 'checkKeyphraseDensity',
			conditions: [ 'content', 'keyphrase', 'text' ]
		},
		keyphraseInIntroduction: {
			title: i18nLocale.keyphraseInIntroductionText,
			checkMethod: 'checkKeyphraseInIntroduction',
			conditions: [ 'content', 'keyphrase', 'text' ]
		},
		previouslyUsedKeyphrase: {
			title: i18nLocale.previouslyUsedKeyphrase,
			checkMethod: 'checkPreviouslyUsedKeyphrase',
			conditions: [ 'keyphrase' ]
		}
	};

	vc.seo_checks = {
		$wpbContentWrapper: null,
		analyzeContent: function ( $contentWrapper ) {
			this.$wpbContentWrapper = $contentWrapper;
			var $content = this.$wpbContentWrapper.find( '>div:not(#vc_no-content-helper)' );
			var $text = $content.find( 'p' );
			var $images = $content.find( 'img' );
			var formData = vc.seo_storage.get( 'formData' );
			var conditions = {
				content: $content.length,
				text: $text.length,
				images: $images.length,
				keyphrase: formData.keyphrase,
				title: formData.title,
				description: formData.description,
				slug: formData.slug
			};
			var areConditionsAllowed = function ( key ) {
				return checkData[key].conditions.every( function ( condition ) {
					return conditions[condition];
				});
			};
			for ( var key in checkData ) {
				if ( checkData[key]) {
					if ( areConditionsAllowed( key ) ) {
						var method = checkData[key].checkMethod;
						this[method]( checkData[key].title );
					} else {
						vc.seo_storage.resetResult( checkData[key].title );
					}
				}
			}
		},
		checkTitleWidth: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.seoTitleWidthTooLong;
			var titleWidth = utils.measureTextWidth( vc.seo_storage.get( 'formData' ).title );

			if ( !titleWidth ) {
				description = i18nLocale.seoTitleEmpty;
			} else if ( titleWidth < maxTitleLength ) {
				state = 'success';
				description = i18nLocale.goodJob;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkFocusKeyphrase: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.noFocusKeyword;

			if ( vc.seo_storage.get( 'formData' ).keyphrase ) {
				state = 'success';
				description = i18nLocale.goodJob;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkDescriptionLength: function ( title ) {
			var state = 'problems';
			var description = '';

			if ( !vc.seo_storage.get( 'formData' ).description.length ) {
				description = i18nLocale.seoDescriptionEmpty;
			} else if ( vc.seo_storage.get( 'formData' ).description.length < 120 ) {
				state = 'warnings';
				description = i18nLocale.seoDescriptionTooShort;
			} else if ( vc.seo_storage.get( 'formData' ).description.length > 120 && vc.seo_storage.get( 'formData' ).description.length <= 156 ) {
				state = 'success';
				description = i18nLocale.wellDone;
			} else if ( vc.seo_storage.get( 'formData' ).description.length > 156 ) {
				state = 'warnings';
				description = i18nLocale.seoDescriptionTooLong;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseInTitle: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.keyphraseInTitleEmpty.replace( '%1$s', vc.seo_storage.get( 'formData' ).keyphrase );
			var seoTitle = vc.seo_storage.get( 'formData' ).title.toLowerCase();
			var seoKeyphrase = vc.seo_storage.get( 'formData' ).keyphrase.trim().toLowerCase();
			var result = utils.findKeyphrase( vc.seo_storage.get( 'formData' ).title, vc.seo_storage.get( 'formData' ).keyphrase );
			var startsWithKeyphrase = 0 === seoTitle.indexOf( seoKeyphrase );

			if ( result.found ) {
				if( startsWithKeyphrase ) {
					state = 'success';
					description = i18nLocale.goodJob;
				} else {
					state = 'warnings';
					description = i18nLocale.keyphraseInTitleWarn;
				}
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseInDescription: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.keyphraseInDescriptionEmpty;
			var result = utils.findKeyphrase( vc.seo_storage.get( 'formData' ).description, vc.seo_storage.get( 'formData' ).keyphrase );

			if ( result.found ) {
				state = 'success';
				description = i18nLocale.keyphraseInDescriptionSuccess;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseInSlug: function ( title ) {
			var state = 'warnings';
			var description = i18nLocale.keyphraseInSlugProblem;
			var result = utils.findKeyphraseInSlug( vc.seo_storage.get( 'formData' ).slug, vc.seo_storage.get( 'formData' ).keyphrase );

			if ( result.found ) {
				state = 'success';
				description = i18nLocale.greatWork;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseInImages: function ( title ) {
			var state = 'success';
			var description = '';
			var imagesData = utils.findKeyphraseInAltTag( this.images, vc.seo_storage.get( 'formData' ).keyphrase );
			var percentage = imagesData.percentage;
			var imagesWithKeyphrase = imagesData.imagesWithKeyphrase;

			// Check if there are more than 4 images
			if ( this.images.length > 4 ) {
				// Check if the percentage falls within the specified range (30% to 70%)
				if ( percentage >= 30 && percentage <= 70 ) {
					description = i18nLocale.goodJob;
				} else if ( percentage > 70 ) {
					state = 'warnings';
					description = i18nLocale.imageKeyphraseTooMuch.replace( '%1$s', this.images.length ).replace( '%2$s', imagesWithKeyphrase );
				} else {
					state = 'warnings';
					description = i18nLocale.imageKeyphraseNotEnough.replace( '%1$s', this.images.length ).replace( '%2$s', imagesWithKeyphrase );
				}
			} else {
				// Check if at least one image contains the keyphrase
				if ( imagesWithKeyphrase > 0 ) {
					description = i18nLocale.goodJob;
				} else {
					state = 'warnings';
					description = i18nLocale.imageKeyphraseMissing;
				}
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseDensity: function ( title ) {
			var state = 'success';
			var description = '';
			var keyphraseInText = utils.findKeyphraseDensity( this.textContent, vc.seo_storage.get( 'formData' ).keyphrase );
			var keyphraseOccurrences = keyphraseInText.keyphraseOccurrences;
			var advisedMinOccurrences = keyphraseInText.advisedMinOccurrences;
			var advisedMaxOccurrences = keyphraseInText.advisedMaxOccurrences;

			if ( keyphraseOccurrences.length < advisedMinOccurrences ) {
				state = 'problems';
				description = i18nLocale.keyphraseDensityNotEnough.replace( '%1$s', keyphraseOccurrences.length ).replace( '%2$s', advisedMinOccurrences );
			} else if ( keyphraseOccurrences.length >= advisedMinOccurrences && keyphraseOccurrences.length <= advisedMaxOccurrences ) {
				description = i18nLocale.keyphraseDensitySuccess.replace( '%1$s', keyphraseOccurrences.length );
			} else {
				state = 'problems';
				description = i18nLocale.keyphraseDensityTooMuch.replace( '%1$s', keyphraseOccurrences.length ).replace( '%2$s', advisedMaxOccurrences );
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkInboundLinks: function ( title ) {
			var inboundLinks = [];
			var goodJob = i18nLocale.goodJob;
			var noInboundLinksDescription = i18nLocale.noInternalLinks;
			var $links = this.$wpbContentWrapper.find( '>div:not(#vc_no-content-helper) a:not([class*=\'vc_control\'])' );
			var inboundLinksState = 'success';
			var inboundLinksDescription = goodJob;

			$.each( $links, function ( i, link ) {
				if ( window.location.host === link.host ) {
					inboundLinks.push( link );
				}
			});
			if ( !inboundLinks.length ) {
				inboundLinksState = 'problems';
				inboundLinksDescription = noInboundLinksDescription;
			}

			vc.seo_storage.updateResult( inboundLinksState, title, inboundLinksDescription, storagePrefix );
		},
		checkOutboundLinks: function ( title ) {
			var outboundLinks = [];
			var goodJob = i18nLocale.goodJob;
			var noOutboundLinksDescription = i18nLocale.noOutboundLinks;
			var $links = this.$wpbContentWrapper.find( '>div:not(#vc_no-content-helper) a:not([class*=\'vc_control\'])' );
			var outboundLinksState = 'success';
			var outboundLinksDescription = goodJob;

			$.each( $links, function ( i, link ) {
				if ( window.location.host !== link.host ) {
					outboundLinks.push( link );
				}
			});
			if ( !outboundLinks.length ) {
				outboundLinksState = 'problems';
				outboundLinksDescription = noOutboundLinksDescription;
			}

			vc.seo_storage.updateResult( outboundLinksState, title, outboundLinksDescription, storagePrefix );
		},
		checkImages: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.noImages;
			var images = this.$wpbContentWrapper.find( '>div:not(#vc_no-content-helper) img' );
			this.images = images;

			if ( images.length ) {
				state = 'success';
				description = i18nLocale.goodJob;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkPostTextLength: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.textLengthLess;
			var postContent = this.$wpbContentWrapper.html();
			var textContent = utils.getTextContent( postContent );
			this.textContent = textContent;
			var textLength = textContent.split( /\s+/ ).length;
			var isContentEmpty = ( 1 === textLength ) && '' === utils.getTextContent( postContent ).split( /\s+/ )[0];

			if ( isContentEmpty ) {
				textLength = 0;
			}
			if ( textLength < 200 ) {
				description = description.replace( '%1$s', textLength ).replace( '%2$s', 'far below' );
			} else if ( textLength >= 200 && textLength < 250 ) {
				description = description.replace( '%1$s', textLength ).replace( '%2$s', 'below' );
			} else if ( textLength >= 250 && textLength < 300 ) {
				description = description.replace( '%1$s', textLength ).replace( '%2$s', 'slightly below' );
				state = 'warnings';
			} else if ( textLength >= 300 ) {
				description = window.sprintf( i18nLocale.textLengthSuccess, textLength );
				state = 'success';
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkKeyphraseInIntroduction: function ( title ) {
			var state = 'problems';
			var description = i18nLocale.keyphraseInIntroductionEmpty;
			var firstParagraph = utils.getParagraphs( this.$wpbContentWrapper ).first().text();
			var result = utils.findKeyphrase( firstParagraph, vc.seo_storage.get( 'formData' ).keyphrase );

			if ( result.found ) {
				state = 'success';
				description = i18nLocale.wellDone;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkPassiveVoicePercentage: function ( title ) {
			var paragraphs = utils.getParagraphs( this.$wpbContentWrapper );
			var percentage = utils.getPassiveVoicePercentage( paragraphs );
			var state = 'problems';
			var description = window.sprintf( i18nLocale.passiveVoiceError, percentage + '%' );

			if ( percentage < 10 ) {
				state = 'success';
				description = i18nLocale.passiveVoiceSuccess;
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkForConsecutiveSentences: function ( title ) {
			var hasConsecutiveSentences = utils.hasConsecutiveSentences( this.textContent );
			var state = hasConsecutiveSentences.state ? 'problems' : 'success';
			var description = i18nLocale.consecutiveSentencesSuccess;

			if ( hasConsecutiveSentences.state ) {
				description = i18nLocale.consecutiveSentencesFail.replace( '%1$s', hasConsecutiveSentences.consecutiveCount );
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkParagraphLength: function ( title ) {
			var state = 'success';
			var description = i18nLocale.paragraphLengthSuccess;
			var paragraphs = utils.getParagraphs( this.$wpbContentWrapper );
			var longParagraphsCount = 0;

			paragraphs.each( function ( index, element ) {
				var paragraphText = $( element ).text();
				// Check the word count for each paragraph
				var wordCount = utils.getWordsCount( paragraphText );
				if ( wordCount > 150 ) {
					longParagraphsCount++;
				}
			});
			if ( longParagraphsCount > 0 ) {
				description = window.sprintf( i18nLocale.paragraphLengthError, longParagraphsCount );
				state = 'problems';
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkSentenceLength: function ( title ) {
			var state = 'success';
			var description = i18nLocale.great;
			var paragraphs = utils.getParagraphs( this.$wpbContentWrapper );
			var totalSentences = 0;
			var longSentencesCount = 0;

			paragraphs.each( function ( index, paragraph ) {
				var sentences = utils.getSentences( $( paragraph ).text() );
				totalSentences += sentences.length;
				// Check the word count for each sentence
				sentences.forEach( function ( sentence ) {
					var wordCount = utils.getWordsCount( sentence );
					if ( wordCount > 20 ) {
						longSentencesCount++;
					}
				});
			});
			var longSentencePercentage = ( longSentencesCount / totalSentences ) * 100;
			if ( 1 !== totalSentences && longSentencePercentage > 25 ) {
				description = window.sprintf( i18nLocale.sentenceLengthError, longSentencePercentage.toFixed() );
				state = 'problems';
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkSubheadingDistribution: function ( title ) {
			var contentHtmlString = this.$wpbContentWrapper.html();
			var textSections = utils.getTextSectionCount( contentHtmlString );
			var state = 'success';
			var description = i18nLocale.goodJob;
			var isNoHeadings = textSections.filter( function ( section ) {
				return !section.subheadingCount && section.wordCount > 300;
			});
			var isNotEnoughHeadings = textSections.filter( function ( section ) {
				return 1 === section.subheadingCount && section.wordCount > 300;
			});

			if ( isNoHeadings.length ) {
				state = 'problems';
				description = i18nLocale.subheadingDistributionFail;
			} else if ( isNotEnoughHeadings.length ) {
				state = 'warnings';
				description = i18nLocale.subheadingDistributionWarn.replace( '%s', isNotEnoughHeadings.length );
			}

			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		},
		checkPreviouslyUsedKeyphrase: function ( title ) {
			var state = 'success';
			var description = i18nLocale.previouslyUsedKeyphraseSuccess;

			if ( vc.seo_storage.get( 'formData' ).isUsedKeyphrase ) {
				state = 'warnings';
				description = i18nLocale.previouslyUsedKeyphraseWarn;
			}
			vc.seo_storage.updateResult( state, title, description, storagePrefix );
		}
	};

})( window.jQuery );