import { compose } from '@wordpress/compose';
import {
	useEffect,
	useCallback,
	useRef,
	Fragment,
	useMemo,
	memo,
	Suspense,
} from '@wordpress/element';
import {
	withSelect,
	withDispatch,
	useSelect,
	select as staticSelect,
} from '@wordpress/data';
import { STORE_NAME } from '@Store/constants';
import { cn } from '@Functions/utils';
import { motion, AnimatePresence } from 'framer-motion';
import { Toaster, toast } from '@bsf/force-ui';
import { GutenbergData, ClassicEditorData } from './dynamic-data-provider';
import { Header, Footer } from '@SeoPopup/components';
import { fetchMetaSettings } from '@/functions/api';
import { usePageChecks } from '@SeoPopup/hooks';
import { SCREENS } from './screens';
import { useKeywordChecks } from '@SeoPopup/components/keyword-checks/hooks/use-keyword-checks';
import { applyFilters } from '@wordpress/hooks';
import { isListingPage } from '@SeoPopup/components/page-seo-checks/analyzer/utils/page-builder';

// Define toast globally for PRO plugin.
if ( window && ! window?.toast ) {
	window.toast = toast;
}

const animateVariants = {
	open: {
		x: 0,
	},
	closed: {
		x: '100%',
	},
};

// For Classic Editor drafts WP shows `?p=ID` as the sample anchor href —
// the slug isn't in the URL until publish — but the live sanitized slug is
// always kept in `#editable-post-name-full`. Build a synthetic URL from it
// so the keyword-in-URL analyzer (substring match) sees the current slug.
export const getClassicEditorPermalink = () => {
	const slugSpan = document.getElementById( 'editable-post-name-full' );
	const liveSlug = slugSpan?.textContent?.trim();
	if ( liveSlug ) {
		return `${ window.location.origin }/${ liveSlug }/`;
	}

	const sampleAnchor = document.querySelector( '#sample-permalink a' );
	return sampleAnchor?.href || surerank_seo_popup?.link || '';
};

export const getEditorData = () => {
	const selectors = staticSelect( STORE_NAME );

	// On listing pages there is no editor — return empty content so any
	// consumer that calls this doesn't crash.
	if ( isListingPage() ) {
		return {
			postContent: '',
			permalink: surerank_seo_popup?.link || '',
			title: '',
			description: selectors?.getPostSeoMeta()?.page_description || '',
		};
	}

	const editor = staticSelect( 'core/editor' );
	const isBlockEditor = surerank_seo_popup?.editor_type === 'block';

	if ( isBlockEditor ) {
		return {
			postContent: editor.getEditedPostContent() || '',
			permalink: editor.getPermalink() || surerank_seo_popup?.link,
			title: editor.getEditedPostAttribute( 'title' ) || '',
			description: selectors.getPostSeoMeta()?.page_description || '',
		};
	}

	// Fallback for Classic Editor
	if (
		typeof window.tinymce !== 'undefined' &&
		window.tinymce.get( 'content' )
	) {
		const titleInput = document.getElementById( 'title' );
		return {
			postContent: window.tinymce.get( 'content' ).getContent() || '',
			permalink: getClassicEditorPermalink(),
			title: titleInput ? titleInput.value || '' : '',
			description: selectors.getPostSeoMeta()?.page_description || '',
		};
	}

	// Fallback for Classic Editor without TinyMCE (plain textarea)
	const textarea = document.getElementById( 'content' );
	const titleInput = document.getElementById( 'title' );
	return {
		postContent: textarea ? textarea.value || '' : '',
		permalink: getClassicEditorPermalink(),
		title: titleInput ? titleInput.value || '' : '',
		description: selectors.getPostSeoMeta()?.page_description || '',
	};
};

const IsolatePageChecksHook = () => {
	useKeywordChecks();
	usePageChecks();
	return null;
};

const SeoModal = ( props ) => {
	const {
		setMetaDataAndDefaults,
		initialized,
		setInitialized,
		updateModalState,
		appSettings,
		updateAppSettings,
	} = props;

	const modalState = useSelect(
		( select ) => select( STORE_NAME ).getModalState(),
		[]
	);

	// Track the active post ID so we can re-fetch when the user opens the
	// modal for a different post from the listing page.
	const activePostId = useSelect(
		( select ) => select( STORE_NAME ).getActivePostId(),
		[]
	);
	const calledOnceRef = useRef( false );
	const prevPostIdRef = useRef( activePostId );

	const getSEOData = useCallback( async () => {
		if ( initialized ) {
			return;
		}

		try {
			const response = await fetchMetaSettings();
			toast.success( response.message );
			setMetaDataAndDefaults( {
				postSeoMeta: response.data,
				globalDefaults: response.global_default,
			} );
		} catch ( error ) {
			toast.error( error.message );
		} finally {
			setInitialized( true );
		}
	}, [ initialized ] );

	useEffect( () => {
		// When the active post changes (listing-page context switch), reset the
		// ref so the next open triggers a fresh fetch for the new post.
		if ( activePostId && prevPostIdRef.current !== activePostId ) {
			calledOnceRef.current = false;
			prevPostIdRef.current = activePostId;
		}

		// RESET_FOR_NEW_POST sets metaboxInitialized: false on every modal open
		// (including same post, same ID). Allow a fresh fetch in all cases so the
		// meta settings form doesn't stay in skeleton state on reopen.
		if ( ! initialized ) {
			calledOnceRef.current = false;
		}

		// On listing pages, don't fetch until the user has selected a post/term
		// (activePostId is set by RESET_FOR_NEW_POST when a row is clicked).
		if ( isListingPage() && ! activePostId ) {
			return;
		}

		if ( ! calledOnceRef.current && ! initialized ) {
			getSEOData();
			calledOnceRef.current = true;
		}
	}, [ getSEOData, activePostId, initialized ] );

	// Allow Pro to inject auto-open logic. Link Manager.
	useEffect( () => {
		if ( ! initialized ) {
			return;
		}

		const handler = applyFilters(
			'surerank.seo_popup.handle_auto_open',
			null
		);
		if ( typeof handler === 'function' ) {
			handler( {
				updateModalState,
				updateAppSettings,
			} );
		}
	}, [ initialized, updateModalState, updateAppSettings ] );

	// Auto-open via `?surerank_open=true` (used by the Learn page to deep-link
	// into the homepage page's SEO metabox when the site uses a static front page).
	useEffect( () => {
		if ( ! initialized || typeof window === 'undefined' ) {
			return;
		}
		const params = new URLSearchParams( window.location.search );
		if ( params.get( 'surerank_open' ) !== 'true' ) {
			return;
		}
		updateModalState( true );
		// Strip the flag so refreshes / rerenders don't reopen the modal.
		params.delete( 'surerank_open' );
		const qs = params.toString();
		window.history.replaceState(
			{},
			'',
			`${ window.location.pathname }${ qs ? `?${ qs }` : '' }${
				window.location.hash
			}`
		);
	}, [ initialized, updateModalState ] );

	const closeModal = useCallback( () => {
		updateModalState( false );
	}, [ updateModalState ] );

	const RenderScreen = useMemo( () => {
		if ( appSettings?.currentScreen ) {
			return SCREENS[ appSettings?.currentScreen ].component;
		}
	}, [ appSettings?.currentScreen ] );

	const RenderHeader = useMemo( () => {
		const screen = SCREENS[ appSettings?.currentScreen ];
		if ( screen?.header ) {
			return screen.header;
		}

		return Header;
	}, [ appSettings?.currentScreen ] );

	return (
		<Fragment>
			<Suspense fallback={ null }>
				<IsolatePageChecksHook />
			</Suspense>
			<Toaster className="z-[100000]" />
			<AnimatePresence>
				{ modalState && (
					<motion.div
						tabIndex="0"
						id="surerank-seo-popup-modal-container"
						className="fixed inset-y-0 right-0 lg:w-slide-over-container md:w-slide-over-container w-full z-[99999] bg-background-primary shadow-2xl p-0 flex flex-col"
						initial="closed"
						animate="open"
						exit="closed"
						variants={ animateVariants }
						transition={ { duration: 0.3 } }
					>
						<RenderHeader onClose={ closeModal } />

						<div
							className={ cn(
								'flex-1 flex flex-col gap-6 overflow-y-auto px-4 pt-4 pb-0',
								appSettings?.currentTab !== 'optimize' && 'pb-4'
							) }
						>
							<RenderScreen />
						</div>
						{ appSettings.currentScreen === 'settings' && (
							<Footer onClose={ closeModal } />
						) }
					</motion.div>
				) }
			</AnimatePresence>
		</Fragment>
	);
};

let hocComponent = ( Component ) => Component;
if ( 'block' === surerank_seo_popup?.editor_type ) {
	hocComponent = GutenbergData;
} else if ( 'classic' === surerank_seo_popup?.editor_type ) {
	hocComponent = ClassicEditorData;
}

export default compose(
	withSelect( ( select ) => {
		const selectStore = select( STORE_NAME );
		return {
			initialized: selectStore.getMetaboxState(),
			appSettings: selectStore.getAppSettings(),
		};
	} ),
	withDispatch( ( dispatch ) => {
		const dispatchStore = dispatch( STORE_NAME );
		return {
			setMetaDataAndDefaults: ( value ) =>
				dispatchStore.initMetaDataAndDefaults( value ),
			setInitialized: ( value ) =>
				dispatchStore.updateMetaboxState( value ),
			updateModalState: ( value ) =>
				dispatchStore.updateModalState( value ),
			updateAppSettings: ( value ) =>
				dispatchStore.updateAppSettings( value ),
		};
	} ),
	hocComponent,
	memo
)( SeoModal );
