/**
 * Jio Creator Studio — 前台 TinyMCE 写作工作台。
 *
 * TinyMCE 负责文章正文编辑，固定操作栏通过 TinyMCE API 执行排版与媒体命令；
 * Jio REST 继续负责保存、审核、权限、付费配置与私有附件归属。
 *
 * @package Jio
 */

import { createRoot, useCallback, useEffect, useMemo, useRef, useState } from '@wordpress/element';
import { __, sprintf } from '@wordpress/i18n';

import { apiPost } from './services/api';
import { PublishDrawer } from './panels/publish-drawer';
import { EditorToolbar } from './components/editor-toolbar';
import { PublishSettings } from './components/publish-settings';
import { type SaveStateValue } from './components/save-state';
import { useAutosave } from './hooks/use-autosave';
import { useLocalRecovery } from './hooks/use-local-recovery';
import { normalizePayForRequest } from './utils/pay';
import { EDITOR_CONTENT_STYLE } from './editor-content-style';
import { hydrateBlocks, serializeBlocks } from './utils/serialize';
import { StatusBar } from './components/status-bar';
import {
	CODE_LANGUAGES,
	codeBlockMarkup,
	dividerMarkup,
	footnoteMarkup,
	listMarkup,
	mathMarkup,
	quoteMarkup,
	tableMarkup,
	tocMarkup,
	type QuoteColor,
} from './utils/block-markup';
import { BlockDialog, type BlockDialogKind, type BlockDialogResult } from './components/block-dialog';
import './styles/studio.scss';

const bootstrap: Record<string, any> = window['jioCreatorStudio'] || {};
const nonce: string = bootstrap.nonce || '';
const STORAGE_KEY = `jio-studio-${bootstrap.sourceId || 0}`;
const EDITOR_ID = 'jio-creator-content';

type Featured = { type: string; data: Record<string, any>; mediaId?: number };
type PayState = {
	enabled: boolean;
	modo: 'cash' | 'points';
	price: string;
	points: number;
	vip1Price: string;
	vip2Price: string;
	payLimit: number;
	downloads: Array<Record<string, any>>;
};

type Limits = {
	titleMin?: number;
	titleMax?: number;
	titlePlaceholder?: string;
	priceMin?: number;
	priceMax?: number;
	pointsMin?: number;
	pointsMax?: number;
};

type Schedule = { enabled: boolean; at: string };

type Draft = {
	postId: number;
	versionId: number;
	rev: number;
	title: string;
	content: string;
	schedule: Schedule;
	categories: number[];
	tags: string[];
	custom: Record<string, string[]>;
	featured: Featured;
	pay: PayState;
};

function initialDraft(): Draft {
	const pay = bootstrap.pay || {};
	const selected = (bootstrap.categories && bootstrap.categories.selected) || [];
	const tags = (bootstrap.tags && bootstrap.tags.items) || [];
	return {
		postId: Number(bootstrap.sourceId || 0),
		versionId: Number(bootstrap.versionId || 0),
		rev: Number(bootstrap.versionRev || 0),
		title: String(bootstrap.title || ''),
		content: String(bootstrap.content || ''),
		schedule: { enabled: false, at: '' },
		categories: selected.map(Number),
		tags: tags.slice(),
		custom: bootstrap.custom || {},
		featured: bootstrap.featured || { type: '', data: {} },
		pay: {
			enabled: !!pay.enabled,
			modo: pay.payModo === 'points' ? 'points' : 'cash',
			price: String(pay.price || '0.00'),
			points: Number(pay.points || 0),
			vip1Price: String(pay.vip1Price || '0.00'),
			vip2Price: String(pay.vip2Price || '0.00'),
			payLimit: Number(pay.payLimit || 0),
			downloads: Array.isArray(pay.downloads) ? pay.downloads : [],
		},
	};
}

/**
 * Backspace / Delete 删除相邻的块级元素。
 *
 * 表格、代码块、引用、分割线这类内容不是普通文本，TinyMCE 默认不会在
 * 空段落里按删除键时主动移除它们，导致「删不掉」。这里在光标处于空段落、
 * 且紧邻目标块时直接移除该块。
 */
function removeAdjacentBlock(editor: any, event: any): void {
	const key = Number(event.keyCode);
	if (key !== 8 && key !== 46) {
		return;
	}
	const selection = editor.selection;
	if (!selection || !selection.isCollapsed()) {
		return;
	}

	const body = editor.getBody();
	const block = selection.getNode();
	const isBlank = (node: any): boolean =>
		!!node && node.nodeType === 1 && (node.textContent || '').trim() === '' &&
		!editor.dom.getParent(node, 'table,pre,hr,.quote_q,.jio-math--block,.jio-toc-placeholder', body);
	const isBlockElement = (node: any): boolean =>
		!!node && node.nodeType === 1 && !!(node.matches?.('table,pre,hr,.quote_q,.jio-math--block,.jio-toc-placeholder'));

	// 光标可能落在空段落里，也可能落在块级元素的边界（TinyMCE 常见行为）；
	// 两种情况下都优先删除紧邻的块，而不是让按键悄悄失效。
	const blankContainer = isBlank(block) ? block : null;
	const direct = blankContainer
		? (key === 8 ? blankContainer.previousElementSibling : blankContainer.nextElementSibling)
		: null;

	if (isBlockElement(direct)) {
		event.preventDefault();
		editor.dom.remove(direct);
		editor.nodeChanged();
		editor.undoManager.add();
		return;
	}

	// 光标停在块首/块尾时，删除块本身。
	const caretBlock = editor.dom.getParent(block, 'table,pre,hr,.quote_q,.jio-math--block,.jio-toc-placeholder', body);
	if (!caretBlock) {
		return;
	}
	const caretIsAtEdge = (start: boolean): boolean => {
		const probe = editor.dom.createRng();
		probe.selectNodeContents(caretBlock);
		probe.collapse(start);
		const caret = selection.getRng();
		return caret && typeof caret.compareBoundaryPoints === 'function'
			&& caret.compareBoundaryPoints(start ? 1 : 3, probe) === 0;
	};

	if (!((key === 8 && caretIsAtEdge(true)) || (key === 46 && caretIsAtEdge(false)))) {
		return;
	}

	event.preventDefault();
	const parent = caretBlock.parentElement;
	editor.dom.remove(caretBlock);
	// 删掉最后一个块后补一个空段落，否则没有可放置光标的位置。
	if (parent && parent.children.length === 0) {
		editor.setContent('<p></p>');
		editor.selection.setCursorLocation(editor.getBody().firstChild, 0);
	}
	editor.nodeChanged();
	editor.undoManager.add();
}

/**
 * 在编辑器里为每个代码块渲染语言角标，并保证回车不会跳出代码区。
 *
 * 角标是编辑期提示（纯 UI），保存前由 serializeBlocks 移除。
 */
/**
 * 在代码块内回车时保持在代码里换行，而不是跳出到普通段落。
 *
 * TinyMCE 默认把 pre 当成不可持续输入的块，回车会新建段落，导致代码跑到
 * 代码块外面。这里手动插入换行并保持光标在 code 内。
 */
/**
 * 让 iframe 高度跟随正文增长，避免编辑器内部出现第二根滚动条。
 *
 * TinyMCE 的 iframe 不会自动撑高；这里测量内容高度并同步容器，
 * 页面整体滚动由外层工作台负责。
 */
function syncEditorHeight(editor: any): void {
	if (!editor || editor.removed) {
		return;
	}
	const doc = editor.getDoc();
	const iframe = editor.getContentAreaContainer()?.querySelector('iframe') as HTMLIFrameElement | null;
	if (!doc || !iframe) {
		return;
	}
	const height = Math.max(
		320,
		doc.documentElement.scrollHeight,
		doc.body ? doc.body.scrollHeight : 0
	);
	iframe.style.height = `${height}px`;
	iframe.style.overflow = 'hidden';
}

function keepCaretInsideCode(editor: any, event: any): boolean {
	if (Number(event.keyCode) !== 13 || event.shiftKey) {
		return false;
	}
	const pre = editor.dom.getParent(editor.selection.getNode(), 'pre.enlighter-pre');
	if (!pre) {
		return false;
	}
	event.preventDefault();
	const code = pre.querySelector('code') || pre;
	editor.selection.setCursorLocation(code, code.childNodes.length);
	editor.insertContent('<br>');
	editor.nodeChanged();
	return true;
}

/** 可整体删除的块级元素选择器。 */
const BLOCK_SELECTOR = 'table,pre.enlighter-pre,hr,.quote_q,p';

/**
 * 给表格 / 代码块 / 引用等块渲染一个浮层删除按钮。
 *
 * 与 WPS 的块操作一致：鼠标悬停到块上时在右上角出现删除入口，
 * 避免只能靠反复按退格键。
 */
function installBlockActions(editor: any): void {
	const doc = editor.getDoc();
	if (!doc || doc.getElementById('jio-block-actions')) {
		return;
	}
	const bar = doc.createElement('div');
	bar.id = 'jio-block-actions';
	bar.className = 'jio-creator__block-actions';
	bar.innerHTML =
		'<button type="button" class="jio-creator__block-action" data-jio-block-delete title="' +
		'删除此块' +
		'" aria-label="删除此块"><span aria-hidden="true">&#10005;</span></button>';
	doc.body.appendChild(bar);

	let current: HTMLElement | null = null;

	const hide = () => {
		current = null;
		bar.classList.remove('is-visible');
	};

	const show = (block: HTMLElement) => {
		if (!block || block === doc.body) {
			hide();
			return;
		}
		// 空段落没有删除价值，交给退格键处理。
		if (block.tagName === 'P' && (block.textContent || '').trim() === '') {
			hide();
			return;
		}
		current = block;
		const rect = block.getBoundingClientRect();
		bar.style.top = `${rect.top + doc.documentElement.scrollTop + 6}px`;
		bar.style.left = `${rect.right - 40}px`;
		bar.classList.add('is-visible');
	};

	doc.addEventListener('mouseover', (event: MouseEvent) => {
		const block = (event.target as HTMLElement)?.closest?.(BLOCK_SELECTOR) as HTMLElement | null;
		if (block && block !== doc.body && !block.classList.contains('jio-code-lang')) {
			show(block);
		}
	});

	doc.addEventListener('mouseleave', hide);

	bar.addEventListener('mousedown', (event: MouseEvent) => event.preventDefault());
	bar.addEventListener('click', (event: MouseEvent) => {
		const button = (event.target as HTMLElement)?.closest('[data-jio-block-delete]');
		if (!button || !current) {
			return;
		}
		event.preventDefault();
		const target = current;
		hide();
		editor.undoManager.transact(() => {
			editor.dom.remove(target);
		});
		editor.nodeChanged();
		editor.undoManager.add();
		if (editor.getBody().children.length === 0) {
			editor.setContent('<p></p>');
			editor.selection.setCursorLocation(editor.getBody().firstChild, 0);
		}
		syncEditorHeight(editor);
	});
}

function syncCodeLabels(editor: any): void {
	const root: HTMLElement | null = editor?.getBody?.() ?? null;
	if (!root) {
		return;
	}
	root.querySelectorAll<HTMLElement>('pre.enlighter-pre[data-jio-code]').forEach((pre) => {
		const existing = pre.querySelector(':scope > .jio-code-lang');
		const language = pre.getAttribute('data-enlighter-language') || 'generic';
		if (existing) {
			existing.setAttribute('data-jio-code-lang', language);
			const label = CODE_LANGUAGES.find((item) => item.value === language)?.label || language;
			if ((existing.textContent || '') !== label) {
				existing.textContent = label;
			}
			return;
		}
		const badge = document.createElement('span');
		badge.className = 'jio-code-lang';
		badge.contentEditable = 'false';
		badge.setAttribute('data-jio-code-lang', language);
		badge.textContent = CODE_LANGUAGES.find((item) => item.value === language)?.label || language;
		pre.insertBefore(badge, pre.firstChild);
	});
}

function escapeAttribute(value: string): string {
	return value.replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
}

function safeHttpUrl(value: unknown): string {
	const raw = String(value || '').trim();
	if (!raw) {
		return '';
	}
	try {
		const url = new URL(raw, window.location.href);
		return url.protocol === 'http:' || url.protocol === 'https:' ? url.href : '';
	} catch (error) {
		return '';
	}
}

function plainText(content: string): string {
	const container = document.createElement('div');
	container.innerHTML = content;
	return (container.textContent || '').replace(/\s+/g, '');
}

function Studio(): JSX.Element {
	const [draft, setDraft] = useState<Draft>(initialDraft);
	const draftRef = useRef(draft);
	draftRef.current = draft;
	const editorRef = useRef<any>(null);
	const editorBookmarkRef = useRef<any>(null);
	const pendingRestoreContentRef = useRef<string | null>(null);
	const editorReadyRef = useRef(false);
	const saveActionRef = useRef<() => void>(() => undefined);
	const [editorReady, setEditorReady] = useState(false);
	const [historyAvailability, setHistoryAvailability] = useState({ canUndo: false, canRedo: false });
	const [formatValue, setFormatValue] = useState('p');
	const [saveState, setSaveState] = useState<SaveStateValue>(() => ({
		state: bootstrap.sourceId || bootstrap.versionId || bootstrap.content ? 'saved' : 'ready',
		at: '',
	}));
	const [drawerOpen, setDrawerOpen] = useState(false);
	const [blockDialog, setBlockDialog] = useState<BlockDialogKind | null>(null);
	const [codeLanguage, setCodeLanguage] = useState<null | string>(null);
	const codeTargetRef = useRef<any>(null);
	const [notice, setNotice] = useState<{ tone: 'ok' | 'error'; text: string } | null>(null);
	const [recovery, setRecovery] = useState<null | { savedAt: string }>(null);
	const dirtyRef = useRef(false);
	const editRevisionRef = useRef(0);

	const capabilities = bootstrap.capabilities || {};
	const limits: Limits = {
		titleMin: Number(bootstrap.limits?.titleMin || 1),
		titleMax: Number(bootstrap.limits?.titleMax || 30),
		titlePlaceholder: String(bootstrap.limits?.titlePlaceholder || __('请输入标题', 'jio')),
		priceMin: Number(bootstrap.pay?.priceMin || 0),
		priceMax: Number(bootstrap.pay?.priceMax || 0),
		pointsMin: Number(bootstrap.pay?.pointsMin || 0),
		pointsMax: Number(bootstrap.pay?.pointsMax || 0),
	};
	const isPublishedEdit = !!bootstrap.isPublished;
	const charCount = useMemo(() => Array.from(plainText(draft.content)).length, [draft.content]);

	const patchDraft = useCallback((patch: Partial<Draft>) => {
		dirtyRef.current = true;
		editRevisionRef.current += 1;
		const next = { ...draftRef.current, ...patch };
		draftRef.current = next;
		setDraft(next);
	}, []);

	const updateContent = useCallback((content: string) => {
		if (content === draftRef.current.content) {
			return;
		}
		dirtyRef.current = true;
		editRevisionRef.current += 1;
		const next = { ...draftRef.current, content };
		draftRef.current = next;
		setDraft(next);
	}, []);

	const updateHistoryAvailability = useCallback((editor: any) => {
		const manager = editor?.undoManager;
		if (!manager) return;
		setHistoryAvailability({
			canUndo: typeof manager.hasUndo === 'function' && manager.hasUndo(),
			canRedo: typeof manager.hasRedo === 'function' && manager.hasRedo(),
		});
	}, []);

	const updateFormatValue = useCallback((editor: any) => {
		const node = editor?.selection?.getNode();
		const block = node ? editor.dom.getParent(node, 'p,h1,h2,h3,blockquote') || node : null;
		const name = block?.nodeName?.toLowerCase() || 'p';
		setFormatValue(['h1', 'h2', 'h3', 'blockquote'].includes(name) ? name : 'p');
	}, []);

	const buildPayload = useCallback((extra: Record<string, any> = {}) => {
		const current = draftRef.current;
		return {
			post_id: current.postId,
			version_id: current.versionId,
			rev: current.rev,
			title: current.title,
			content: current.content,
			categories: current.categories,
			tags: current.tags,
			custom: current.custom,
			featured: current.featured,
			schedule: {
				enabled: !!current.schedule.enabled,
				at: current.schedule.enabled ? current.schedule.at : '',
			},
			pay: normalizePayForRequest(current.pay),
			...extra,
		};
	}, []);

	const save = useCallback(
		async (autosave = false): Promise<boolean> => {
			const editor = editorRef.current;
			if (editor && !editor.removed) {
				updateContent(serializeBlocks(editor.getContent()));
			}
			const current = draftRef.current;
			if (!dirtyRef.current && (current.postId > 0 || current.versionId > 0)) {
				return true;
			}
			const requestRevision = editRevisionRef.current;
			const hasDocument = current.title.trim() !== '' || plainText(current.content).trim() !== '';
			if (autosave && !hasDocument) {
				return true;
			}
			setSaveState({ state: 'saving', at: '' });
			try {
				const response = await apiPost(bootstrap.creator.saveUrl, buildPayload({ autosave }), nonce);
				const updated = {
					...draftRef.current,
					postId: Number(response.post_id || draftRef.current.postId || 0),
					versionId: Number(response.version_id || draftRef.current.versionId || 0),
					rev: Number(response.rev || response.versionRev || draftRef.current.rev || 0),
				};
				if ((window as any).jioSubmitData) {
					(window as any).jioSubmitData.postId = updated.postId;
				}
				const settled = editRevisionRef.current === requestRevision;
				dirtyRef.current = !settled;
				draftRef.current = updated;
				setDraft(updated);
				setSaveState({ state: settled ? 'saved' : 'saving', at: settled ? new Date().toLocaleTimeString() : '' });
				return settled;
			} catch (error: any) {
				setSaveState({ state: error?.status === 409 ? 'conflict' : 'error', at: '' });
				return false;
			}
		},
		[buildPayload]
	);
	saveActionRef.current = () => void save(false);

	const submit = useCallback(
		async (publishNow: boolean): Promise<void> => {
			const persisted = await save(false);
			if (!persisted) {
				setNotice({ tone: 'error', text: __('内容保存失败，请重试后再提交', 'jio') });
				return;
			}
			setSaveState({ state: 'submitting', at: '' });
			try {
				let captchaProof = '';
				const captcha = (window as any).JioCaptcha;
				if (bootstrap.captcha?.enabled && captcha && typeof captcha.run === 'function') {
					const payload = await captcha.run('front_submit');
					if (payload === null) {
						setSaveState({ state: 'ready', at: '' });
						setNotice({ tone: 'error', text: __('请先完成人机验证', 'jio') });
						return;
					}
					captchaProof = String(payload?.jio_captcha_proof || '');
				}
				const response = await apiPost(
					bootstrap.creator.submitUrl,
					buildPayload({
						post_id: draftRef.current.postId,
						version_id: draftRef.current.versionId,
						rev: draftRef.current.rev,
						publish_now: publishNow,
						captcha_proof: captchaProof,
					}),
					nonce
				);
				dirtyRef.current = false;
				setSaveState({ state: 'submitted', at: '' });
				setNotice({ tone: 'ok', text: String(response.message || __('已提交', 'jio')) });
				setDrawerOpen(false);
				const target = response.url || response.goto || bootstrap.urls?.center;
				if (target) {
					window.setTimeout(() => {
						window.location.href = target;
					}, 900);
				}
			} catch (error: any) {
				setSaveState({ state: 'error', at: '' });
				setNotice({ tone: 'error', text: String(error?.message || __('提交失败', 'jio')) });
			}
		},
		[buildPayload, save]
	);

	const preview = useCallback(async (): Promise<void> => {
		const saved = await save(false);
		if (!saved) {
			return;
		}
		try {
			const response = await apiPost(
				bootstrap.creator.previewUrl,
				{ post_id: draftRef.current.postId, version_id: draftRef.current.versionId },
				nonce
			);
			if (response.url) {
				window.open(String(response.url), '_blank', 'noopener');
			}
		} catch (error: any) {
			setNotice({ tone: 'error', text: String(error?.message || __('预览失败', 'jio')) });
		}
	}, [save]);

	const { markLocalSaved, clear } = useLocalRecovery({
		key: STORAGE_KEY,
		snapshot: { title: draft.title, content: draft.content, at: new Date().toISOString() },
		onFound: (savedAt: string) => setRecovery({ savedAt }),
	});

	const autosave = useAutosave({
		enabled: !!capabilities.isLoggedIn,
		onSave: async () => {
			const ok = await save(true);
			if (ok) {
				clear();
			}
			return ok;
		},
		onLocal: markLocalSaved,
	});

	const autosaveSchedule = autosave.schedule;

	useEffect(() => {
		if (dirtyRef.current) {
			autosaveSchedule();
		}
	}, [draft, autosaveSchedule]);

	useEffect(() => {
		const beforeUnload = (event: BeforeUnloadEvent) => {
			if (!dirtyRef.current) {
				return;
			}
			event.preventDefault();
			event.returnValue = '';
		};
		window.addEventListener('beforeunload', beforeUnload);
		return () => window.removeEventListener('beforeunload', beforeUnload);
	}, []);

	useEffect(() => {
		const onKey = (event: KeyboardEvent) => {
			if ((event.metaKey || event.ctrlKey) && event.key.toLowerCase() === 's') {
				event.preventDefault();
				void save(false);
			}
		};
		window.addEventListener('keydown', onKey);
		return () => window.removeEventListener('keydown', onKey);
	}, [save]);

	useEffect(() => {
		const wpEditor = (window as any).wp?.editor;
		if (!wpEditor || typeof wpEditor.initialize !== 'function') {
			setNotice({ tone: 'error', text: __('TinyMCE 加载失败，请刷新页面后重试。', 'jio') });
			return undefined;
		}

		const editorSettings: Record<string, any> = {
			quicktags: false,
			tinymce: {
				menubar: false,
				statusbar: false,
				resize: false,
				toolbar1: '',
				toolbar2: '',
				toolbar3: '',
				plugins: 'paste,link,lists,wordpress,wplink',
				wpautop: true,
				body_class: 'jio-creator__tinymce',
				content_css: bootstrap.creator?.contentCss || '',
				content_style: EDITOR_CONTENT_STYLE,
				// iframe 高度随后由 autoresize 随正文增长，这里只给初始值。
				height: 520,
				placeholder: String(bootstrap.limits?.contentPlaceholder || ''),
				setup: (editor: any) => {
					editorRef.current = editor;
					editor.on('init', () => {
						editorReadyRef.current = true;
						setEditorReady(true);
						if (pendingRestoreContentRef.current !== null) {
							editor.setContent(hydrateBlocks(pendingRestoreContentRef.current));
							pendingRestoreContentRef.current = null;
						} else {
							editor.setContent(hydrateBlocks(editor.getContent()));
						}
						syncCodeLabels(editor);
						syncEditorHeight(editor);
						installBlockActions(editor);
						updateHistoryAvailability(editor);
						updateFormatValue(editor);
					});
					editor.on('NodeChange', () => updateFormatValue(editor));
					// 代码块右上角的语言标签：点击整块即可换语言，等价于公众号的「高亮」入口。
					editor.on('input change Undo Redo AddUndo', () => {
						updateContent(serializeBlocks(editor.getContent()));
						updateHistoryAvailability(editor);
						syncCodeLabels(editor);
						syncEditorHeight(editor);
					});
					editor.on('keydown', (event: any) => {
						if ((event.metaKey || event.ctrlKey) && event.keyCode === 83) {
							event.preventDefault();
							saveActionRef.current();
							return;
						}
						removeAdjacentBlock(editor, event);
					});
				},
			},
		};
		wpEditor.initialize(EDITOR_ID, editorSettings);

		return () => {
			wpEditor.remove?.(EDITOR_ID);
			editorReadyRef.current = false;
			editorRef.current = null;
		};
	}, [updateContent]);

	const restore = useCallback(() => {
		try {
			const raw = window.localStorage.getItem(STORAGE_KEY);
			if (raw) {
				const parsed = JSON.parse(raw);
				const patch: Partial<Draft> = {};
				if (typeof parsed.title === 'string') patch.title = parsed.title;
				if (typeof parsed.content === 'string') patch.content = parsed.content;
				patchDraft(patch);
				if (typeof parsed.content === 'string') {
					if (editorReadyRef.current) {
						editorRef.current?.setContent(parsed.content);
					} else {
						pendingRestoreContentRef.current = parsed.content;
					}
				}
			}
		} catch (error) {
			// 快照损坏时忽略，不影响服务端内容。
		}
		setRecovery(null);
	}, [patchDraft]);

	const rememberSelection = useCallback(() => {
		const editor = editorRef.current;
		if (editor && !editor.removed) {
			editorBookmarkRef.current = editor.selection.getBookmark(2, true);
		}
	}, []);

	const focusEditor = useCallback(() => {
		const editor = editorRef.current;
		if (!editor || editor.removed) {
			return null;
		}
		editor.focus();
		if (editorBookmarkRef.current) {
			try {
				editor.selection.moveToBookmark(editorBookmarkRef.current);
			} catch (error) {
				// TinyMCE discards invalid bookmarks after content replacement.
			}
			editorBookmarkRef.current = null;
		}
		return editor;
	}, []);

	const command = useCallback((name: string, value?: string) => {
		const editor = focusEditor();
		if (!editor) {
			return;
		}
		if (name === 'undo') {
			editor.undoManager.undo();
		} else if (name === 'redo') {
			editor.undoManager.redo();
		} else if (name === 'format') {
			if (value === 'p') {
				editor.execCommand('FormatBlock', false, 'p');
			} else {
				editor.formatter.toggle(value || 'h2');
			}
			updateFormatValue(editor);
		} else {
			editor.execCommand(name);
		}
		editor.nodeChanged();
	}, [focusEditor]);

	const openLink = useCallback(() => {
		const editor = focusEditor();
		if (!editor) {
			return;
		}
		const wpLink = (window as any).wpLink;
		if (wpLink && typeof wpLink.open === 'function') {
			wpLink.open(editor.id);
			return;
		}
		const url = window.prompt(__('输入链接地址', 'jio'), 'https://');
		const safeUrl = url ? safeHttpUrl(url) : '';
		if (safeUrl) {
			editor.execCommand('mceInsertLink', false, { href: safeUrl });
		}
	}, [focusEditor]);

	const insertHtml = useCallback((html: string) => {
		const editor = focusEditor();
		if (!editor || !html) {
			return;
		}
		editor.insertContent(html);
		editor.nodeChanged();
		updateContent(serializeBlocks(editor.getContent()));
		updateHistoryAvailability(editor);
		syncCodeLabels(editor);
	}, [focusEditor]);

	// 直接插入、无需参数的小块；需要参数的块打开通用弹窗。
	const insertBlock = useCallback((kind: string) => {
		rememberSelection();
		// code 走「语言选择」弹窗，其余三类走通用插入弹窗。
		if (kind === 'table' || kind === 'math' || kind === 'footnote') {
			setBlockDialog(kind as BlockDialogKind);
			return;
		}
		if (kind === 'code') {
			// 直接插入；语言可稍后点代码块右上角的角标更换。
			insertHtml(codeBlockMarkup('generic'));
			return;
		}
		if (kind === 'list') {
			insertHtml(listMarkup(false));
			return;
		}
		if (kind === 'toc') {
			insertHtml(tocMarkup());
			return;
		}
		if (kind === 'divider') {
			insertHtml(dividerMarkup());
		}
	}, [insertHtml, rememberSelection]);

	const insertQuote = useCallback((colorClass: QuoteColor) => {
		const editor = focusEditor();
		if (!editor) {
			return;
		}
		const selected = String(editor.selection.getContent() || '').trim();
		const existing = editor.dom.getParent(editor.selection.getNode(), '.quote_q');
		if (existing) {
			existing.className = `quote_q quote-mce${colorClass ? ` ${colorClass}` : ''}`;
			editor.nodeChanged();
			return;
		}
		insertHtml(quoteMarkup(selected, colorClass));
	}, [focusEditor, insertHtml]);

	const applyBlockDialog = useCallback((result: BlockDialogResult) => {
		setBlockDialog(null);
		// 弹窗抢走焦点后，插入前把光标放回正文的原选区。
		if (result.kind === 'table') {
			insertHtml(tableMarkup(result));
		} else if (result.kind === 'math') {
			insertHtml(mathMarkup(result));
		} else {
			insertHtml(footnoteMarkup(result.note));
		}
	}, [insertHtml]);

	const openMedia = useCallback((type: 'image' | 'video' | 'file') => {
		const editor = editorRef.current;
		const media = (window as any).JioSubmitMedia;
		if (!editor || !media || typeof media.open !== 'function') {
			setNotice({ tone: 'error', text: __('媒体工具尚未加载，请刷新页面后重试。', 'jio') });
			return;
		}
		rememberSelection();
		media.open({
			type,
			multiple: type === 'image' ? undefined : false,
			onSelect: (selected: any) => {
				const items = Array.isArray(selected) ? selected : [selected];
				const target = focusEditor();
				if (!target) return;
				const markup = items.map((item) => {
					const url = safeHttpUrl(item?.large_url || item?.url);
					if (!url) return '';
					const id = Number(item.attachment_id || item.id || 0);
					const idAttribute = id > 0 ? ` data-edit-file-id="${id}"` : '';
					if (type === 'image') {
						const fullUrl = safeHttpUrl(item?.url || url);
						const fullAttribute = fullUrl ? ` data-full-url="${escapeAttribute(fullUrl)}"` : '';
						return `<p><img src="${escapeAttribute(url)}"${idAttribute} alt="${escapeAttribute(String(item.name || item.title || ''))}"${fullAttribute}></p>`;
					}
					if (type === 'file') {
						const name = String(item.filename || item.name || url.split('/').pop() || '');
						return `<p><a class="jio-file-link" href="${escapeAttribute(url)}"${idAttribute}><i class="fa fas fa-paperclip" aria-hidden="true"></i> ${escapeAttribute(name)}</a></p>`;
					}
					return `<div contenteditable="false" data-video-url="${escapeAttribute(url)}" data-video-name="${escapeAttribute(String(item.filename || item.name || url))}"${idAttribute} class="new-dplayer post-dplayer dplayer"></div><p></p>`;
				}).join('');
				if (markup) {
					target.insertContent(markup);
					target.nodeChanged();
					updateContent(target.getContent());
					updateHistoryAvailability(target);
				}
			},
			onEmbed: (html: string) => {
				const target = focusEditor();
				if (target) {
					target.insertContent(`${html}<p></p>`);
					target.nodeChanged();
					updateContent(target.getContent());
					updateHistoryAvailability(target);
				}
			},
		});
	}, [focusEditor, rememberSelection]);

	return (
		<div className="jio-creator" data-status={bootstrap.status || ''} data-editor-ready={editorReady ? 'true' : 'false'}>
			<header className="jio-creator__bar">
				<div className="jio-creator__bar-left">
					<a className="jio-creator__back" href={bootstrap.urls?.center || '/'} aria-label={__('返回作者中心', 'jio')}>
						<i className="fa fas fa-angle-left" aria-hidden="true" />
					</a>
					<span className="jio-creator__bar-brand">Jio</span>
					<span className="jio-creator__bar-divider" aria-hidden="true" />
					<span className="jio-creator__bar-mode">
						{isPublishedEdit ? __('修改文章', 'jio') : __('写文章', 'jio')}
					</span>
				</div>

				<EditorToolbar
					ready={editorReady}
					formatValue={formatValue}
					onFormatChange={setFormatValue}
					canUndo={historyAvailability.canUndo}
					canRedo={historyAvailability.canRedo}
					capabilities={capabilities}
					onCommand={command}
					onRememberSelection={rememberSelection}
					onOpenLink={openLink}
					onOpenMedia={openMedia}
					onInsertBlock={insertBlock}
					onInsertQuote={insertQuote}
				/>
			</header>

			{recovery && (
				<div className="jio-creator__notice" role="status">
					<span>{__('发现本地未同步的草稿。', 'jio')}</span>
					<button type="button" onClick={restore}>{__('恢复', 'jio')}</button>
					<button type="button" onClick={() => setRecovery(null)}>{__('忽略', 'jio')}</button>
				</div>
			)}

			{notice && (
				<div className={`jio-creator__notice is-${notice.tone}`} role="status">
					<span>{notice.text}</span>
					<button type="button" onClick={() => setNotice(null)} aria-label={__('关闭', 'jio')}>
						<i className="fa fas fa-times" aria-hidden="true" />
					</button>
				</div>
			)}

			{isPublishedEdit && (
				<p className="jio-creator__hint">{__('这篇改稿不会立即覆盖线上文章；审核通过后才会替换。', 'jio')}</p>
			)}

			<main className="jio-creator__canvas">
				<label className="jio-creator__title">
					<span className="screen-reader-text">{__('文章标题', 'jio')}</span>
					<textarea
						value={draft.title}
						onChange={(event) => patchDraft({ title: event.target.value })}
						rows={1}
						placeholder={sprintf(
							/* translators: %d: max title length */
							__('请输入标题（最多 %d 个字）', 'jio'),
							Number(limits.titleMax) || 100
						)}
						spellCheck={false}
						maxLength={Number(limits.titleMax) || 100}
					/>
				</label>

				<div className="jio-creator__editor" data-editor-ready={editorReady ? 'true' : 'false'}>
					<textarea id={EDITOR_ID} defaultValue={draft.content} onChange={(event) => updateContent(event.target.value)} aria-label={__('文章正文', 'jio')} />
				</div>
			</main>

			<PublishSettings
				featured={draft.featured}
				canEditCover={!!capabilities.canUploadImage}
				canSchedule={!!capabilities.canSchedule}
				scheduleEnabled={!!draft.schedule.enabled}
				scheduleAt={draft.schedule.at}
				onFeaturedChange={(featured) => patchDraft({ featured })}
				onScheduleChange={(enabled, at) => patchDraft({ schedule: { enabled, at } })}
			/>

			{codeLanguage !== null && (
				<div className="jio-creator-dialog" role="dialog" aria-modal="true" aria-labelledby="jio-code-lang-title">
					<button type="button" className="jio-creator-dialog__backdrop" aria-label={__('关闭', 'jio')} onClick={() => setCodeLanguage(null)} />
					<div className="jio-creator-dialog__panel">
						<header className="jio-creator-dialog__head">
							<h2 id="jio-code-lang-title">{__('代码语言', 'jio')}</h2>
							<button type="button" className="jio-creator-dialog__close" onClick={() => setCodeLanguage(null)} aria-label={__('关闭', 'jio')}>
								<i className="fa fas fa-times" aria-hidden="true" />
							</button>
						</header>
						<div className="jio-creator-dialog__body">
							<div className="jio-creator__lang-grid">
								{CODE_LANGUAGES.map((item) => (
									<button
										key={item.value}
										type="button"
										className={`jio-creator__lang-item${item.value === codeLanguage ? ' is-active' : ''}`}
										onClick={() => {
											const target = codeTargetRef.current;
											codeTargetRef.current = null;
											setCodeLanguage(null);
											if (!target) {
												return;
											}
											target.setAttribute('data-enlighter-language', item.value);
											const code = target.querySelector('code');
											if (code) {
												code.setAttribute('data-enlighter-language', item.value);
											}
											syncCodeLabels(editorRef.current);
											updateContent(serializeBlocks(editorRef.current.getContent()));
										}}
									>
										{item.label}
									</button>
								))}
							</div>
						</div>
					</div>
				</div>
			)}

			{blockDialog && (
				<BlockDialog
					kind={blockDialog}
					onSubmit={applyBlockDialog}
					onClose={() => setBlockDialog(null)}
				/>
			)}

			<StatusBar
				charCount={charCount}
				saveState={saveState}
				isPublishedEdit={isPublishedEdit}
				saving={!editorReady || saveState.state === 'saving' || saveState.state === 'submitting'}
				onSaveDraft={() => void save(false)}
				onPreview={() => void preview()}
				onPublish={() => setDrawerOpen(true)}
			/>

			{drawerOpen && (
				<PublishDrawer
					draft={draft}
					setDraft={patchDraft}
					capabilities={capabilities}
					limits={limits}
					taxonomy={{
						categories: (bootstrap.categories && bootstrap.categories.items) || [],
						tags: !!bootstrap.tags?.enabled,
						customDefs: bootstrap.customDefs || [],
					}}
					isPublishedEdit={isPublishedEdit}
					onClose={() => setDrawerOpen(false)}
					onSaveDraft={() => void save(false)}
					onSubmit={(publishNow: boolean) => void submit(publishNow)}
					privateStorage={!!bootstrap.privateStorage}
					privateUploads={bootstrap.privateUploads || []}
					captcha={!!bootstrap.captcha?.enabled}
					saving={saveState.state === 'saving' || saveState.state === 'submitting'}
				/>
			)}
		</div>
	);
}

function mount() {
	const target = document.getElementById('jio-creator-studio');
	if (!target) {
		return;
	}
	target.classList.add('is-ready');
	createRoot(target).render(<Studio />);
}

if (document.readyState === 'loading') {
	document.addEventListener('DOMContentLoaded', mount);
} else {
	mount();
}

export { Studio };