import clsx from 'clsx';
import { createBlock, parseWithAttributeSchema } from '@wordpress/blocks';
import { InnerBlocks, RichText, useBlockProps } from '@wordpress/block-editor';

export const migrateToQuoteV2 = ( attributes ) => {
	const { value, ...restAttributes } = attributes;

	return [
		{
			...restAttributes,
		},
		value
			? parseWithAttributeSchema( value, {
					type: 'array',
					source: 'query',
					selector: 'p',
					query: {
						content: {
							type: 'string',
							source: 'html',
						},
					},
			  } ).map( ( { content } ) =>
					createBlock( 'core/paragraph', { content } )
			  )
			: createBlock( 'core/paragraph' ),
	];
};

const TEXT_ALIGN_OPTIONS = [ 'left', 'right', 'center' ];

// Migrate existing text alignment settings to the renamed attribute.
const migrateTextAlign = ( attributes, innerBlocks ) => {
	const { align, ...rest } = attributes;
	// Check if there are valid alignments stored in the old attribute
	// and assign them to the new attribute name.
	const migratedAttributes = TEXT_ALIGN_OPTIONS.includes( align )
		? { ...rest, textAlign: align }
		: attributes;

	return [ migratedAttributes, innerBlocks ];
};

// Migrate the v2 blocks with style === `2`;
const migrateLargeStyle = ( attributes, innerBlocks ) => {
	return [
		{
			...attributes,
			className: attributes.className
				? attributes.className + ' is-style-large'
				: 'is-style-large',
		},
		innerBlocks,
	];
};

// Version before the 'align' attribute was replaced with 'textAlign'.
const v4 = {
	attributes: {
		value: {
			type: 'string',
			source: 'html',
			selector: 'blockquote',
			multiline: 'p',
			default: '',
			role: 'content',
		},
		citation: {
			type: 'string',
			source: 'html',
			selector: 'cite',
			default: '',
			role: 'content',
		},
		align: {
			type: 'string',
		},
	},
	supports: {
		anchor: true,
		html: false,
		__experimentalOnEnter: true,
		__experimentalOnMerge: true,
		typography: {
			fontSize: true,
			lineHeight: true,
			__experimentalFontFamily: true,
			__experimentalFontWeight: true,
			__experimentalFontStyle: true,
			__experimentalTextTransform: true,
			__experimentalTextDecoration: true,
			__experimentalLetterSpacing: true,
			__experimentalDefaultControls: {
				fontSize: true,
				fontAppearance: true,
			},
		},
		color: {
			gradients: true,
			heading: true,
			link: true,
			__experimentalDefaultControls: {
				background: true,
				text: true,
			},
		},
	},
	isEligible: ( { align } ) => TEXT_ALIGN_OPTIONS.includes( align ),
	save( { attributes } ) {
		const { align, citation } = attributes;
		const className = clsx( {
			[ `has-text-align-${ align }` ]: align,
		} );
		return (
			<blockquote { ...useBlockProps.save( { className } ) }>
				<InnerBlocks.Content />
				{ ! RichText.isEmpty( citation ) && (
					<RichText.Content tagName="cite" value={ citation } />
				) }
			</blockquote>
		);
	},
	migrate: migrateTextAlign,
};

const v3 = {
	attributes: {
		value: {
			type: 'string',
			source: 'html',
			selector: 'blockquote',
			multiline: 'p',
			default: '',
			role: 'content',
		},
		citation: {
			type: 'string',
			source: 'html',
			selector: 'cite',
			default: '',
			role: 'content',
		},
		align: {
			type: 'string',
		},
	},
	supports: {
		anchor: true,
		__experimentalSlashInserter: true,
		typography: {
			fontSize: true,
			lineHeight: true,
			__experimentalFontStyle: true,
			__experimentalFontWeight: true,
			__experimentalLetterSpacing: true,
			__experimentalTextTransform: true,
			__experimentalDefaultControls: {
				fontSize: true,
				fontAppearance: true,
			},
		},
	},
	save( { attributes } ) {
		const { align, value, citation } = attributes;

		const className = clsx( {
			[ `has-text-align-${ align }` ]: align,
		} );

		return (
			<blockquote { ...useBlockProps.save( { className } ) }>
				<RichText.Content multiline value={ value } />
				{ ! RichText.isEmpty( citation ) && (
					<RichText.Content tagName="cite" value={ citation } />
				) }
			</blockquote>
		);
	},
	migrate( attributes ) {
		return migrateTextAlign( ...migrateToQuoteV2( attributes ) );
	},
};

const v2 = {
	attributes: {
		value: {
			type: 'string',
			source: 'html',
			selector: 'blockquote',
			multiline: 'p',
			default: '',
		},
		citation: {
			type: 'string',
			source: 'html',
			selector: 'cite',
			default: '',
		},
		align: {
			type: 'string',
		},
	},
	migrate( attributes ) {
		return migrateTextAlign( ...migrateToQuoteV2( attributes ) );
	},
	save( { attributes } ) {
		const { align, value, citation } = attributes;

		return (
			<blockquote style={ { textAlign: align ? align : null } }>
				<RichText.Content multiline value={ value } />
				{ ! RichText.isEmpty( citation ) && (
					<RichText.Content tagName="cite" value={ citation } />
				) }
			</blockquote>
		);
	},
};

const v1 = {
	attributes: {
		value: {
			type: 'string',
			source: 'html',
			selector: 'blockquote',
			multiline: 'p',
			default: '',
		},
		citation: {
			type: 'string',
			source: 'html',
			selector: 'cite',
			default: '',
		},
		align: {
			type: 'string',
		},
		style: {
			type: 'number',
			default: 1,
		},
	},

	migrate( attributes ) {
		if ( attributes.style === 2 ) {
			const { style, ...restAttributes } = attributes;
			return migrateTextAlign(
				...migrateLargeStyle( ...migrateToQuoteV2( restAttributes ) )
			);
		}

		return migrateTextAlign( ...migrateToQuoteV2( attributes ) );
	},

	save( { attributes } ) {
		const { align, value, citation, style } = attributes;

		return (
			<blockquote
				className={ style === 2 ? 'is-large' : '' }
				style={ { textAlign: align ? align : null } }
			>
				<RichText.Content multiline value={ value } />
				{ ! RichText.isEmpty( citation ) && (
					<RichText.Content tagName="cite" value={ citation } />
				) }
			</blockquote>
		);
	},
};

const v0 = {
	attributes: {
		value: {
			type: 'string',
			source: 'html',
			selector: 'blockquote',
			multiline: 'p',
			default: '',
		},
		citation: {
			type: 'string',
			source: 'html',
			selector: 'footer',
			default: '',
		},
		align: {
			type: 'string',
		},
		style: {
			type: 'number',
			default: 1,
		},
	},

	migrate( attributes ) {
		if ( ! isNaN( parseInt( attributes.style ) ) ) {
			const { style, ...restAttributes } = attributes;
			return migrateTextAlign( ...migrateToQuoteV2( restAttributes ) );
		}

		return migrateTextAlign( ...migrateToQuoteV2( attributes ) );
	},

	save( { attributes } ) {
		const { align, value, citation, style } = attributes;

		return (
			<blockquote
				className={ `blocks-quote-style-${ style }` }
				style={ { textAlign: align ? align : null } }
			>
				<RichText.Content multiline value={ value } />
				{ ! RichText.isEmpty( citation ) && (
					<RichText.Content tagName="footer" value={ citation } />
				) }
			</blockquote>
		);
	},
};

/**
 * New deprecations need to be placed first
 * for them to have higher priority.
 *
 * Old deprecations may need to be updated as well.
 *
 * See block-deprecation.md
 */
export default [ v4, v3, v2, v1, v0 ];