/*
 * SPDX-FileCopyrightText: syuilo and misskey-project
 * SPDX-License-Identifier: AGPL-3.0-only
 */

/// <reference lib="esnext" />

import { parse as vueSfcParse } from 'vue/compiler-sfc';
import {
	createLogger,
	EnvironmentModuleGraph,
	normalizePath,
	type LogErrorOptions,
	type LogOptions,
	type Plugin,
	type PluginOption
} from 'vite';
import fs from 'node:fs';
import { glob } from 'glob';
import JSON5 from 'json5';
import MagicString, { SourceMap } from 'magic-string';
import path from 'node:path'
import { hash, toBase62 } from '../vite.config';
import { minimatch } from 'minimatch';
import type {
	AttributeNode, CompoundExpressionNode, DirectiveNode,
	ElementNode,
	RootNode, SimpleExpressionNode,
	TemplateChildNode,
} from '@vue/compiler-core';
import { NodeTypes } from '@vue/compiler-core';

export interface SearchIndexItem {
	id: string;
	parentId?: string;
	path?: string;
	label: string;
	keywords: string | string[];
	icon?: string;
	inlining?: string[];
}

export type Options = {
	targetFilePaths: string[],
	mainVirtualModule: string,
	modulesToHmrOnUpdate: string[],
	fileVirtualModulePrefix?: string,
	fileVirtualModuleSuffix?: string,
	verbose?: boolean,
};

// マーカー関係を表す型
interface MarkerRelation {
	parentId?: string;
	markerId: string;
	node: ElementNode;
}

// ロガー
let logger = {
	info: (msg: string, options?: LogOptions) => { },
	warn: (msg: string, options?: LogOptions) => { },
	error: (msg: string, options?: LogErrorOptions) => { },
};
let loggerInitialized = false;

function initLogger(options: Options) {
	if (loggerInitialized) return;
	loggerInitialized = true;
	const viteLogger = createLogger(options.verbose ? 'info' : 'warn');

	logger.info = (msg, options) => {
		msg = `[create-search-index] ${msg}`;
		viteLogger.info(msg, options);
	}

	logger.warn = (msg, options) => {
		msg = `[create-search-index] ${msg}`;
		viteLogger.warn(msg, options);
	}

	logger.error = (msg, options) => {
		msg = `[create-search-index] ${msg}`;
		viteLogger.error(msg, options);
	}
}

/**
 * TypeScriptコード生成
 */
function generateJavaScriptCode(resolvedRootMarkers: SearchIndexItem[]): string {
	return `import { i18n } from '@/i18n.js';\n`
		+ `export const searchIndexes = ${customStringify(resolvedRootMarkers)};\n`;
}

/**
 * オブジェクトを特殊な形式の文字列に変換する
 * i18n参照を保持しつつ適切な形式に変換
 */
function customStringify(obj: unknown): string {
	return JSON.stringify(obj).replaceAll(/"(.*?)"/g, (all, group) => {
		// propertyAccessProxy が i18n 参照を "${i18n.xxx}"のような形に変換してるので、これをそのまま`${i18n.xxx}`
		// のような形にすると、実行時にi18nのプロパティにアクセスするようになる。
		// objectのkeyでは``が使えないので、${ が使われている場合にのみ``に置き換えるようにする
		return group.includes('${') ? '`' + group + '`' : all;
	});
}

/**
 * 要素ノードからテキスト内容を抽出する
 * 各抽出方法を分離して可読性を向上
 */
function extractElementText(node: TemplateChildNode): string | null {
	if (!node) return null;
	if (node.type === NodeTypes.COMPOUND_EXPRESSION) throw new Error("Unexpected COMPOUND_EXPRESSION");

	logger.info(`Extracting text from node type=${node.type}, tag=${'tag' in node ? node.tag : 'unknown'}`);

	// 1. 直接コンテンツの抽出を試行
	const directContent = extractDirectContent(node);
	if (directContent) return directContent;

	// 子要素がない場合は終了
	if (!('children' in node) || !Array.isArray(node.children)) {
		return null;
	}

	// 2. インターポレーションノードを検索
	const interpolationContent = extractInterpolationContent(node.children);
	if (interpolationContent) return interpolationContent;

	// 3. 式ノードを検索
	const expressionContent = extractExpressionContent(node.children);
	if (expressionContent) return expressionContent;

	// 5. 再帰的に子ノードを探索
	return extractNestedContent(node.children);
}
/**
 * ノードから直接コンテンツを抽出
 */
function extractDirectContent(node: TemplateChildNode): string | null {
	if (!('content' in node)) return null;
	if (typeof node.content == 'object' && node.content.type === NodeTypes.COMPOUND_EXPRESSION) throw new Error("Unexpected COMPOUND_EXPRESSION");

	const content = typeof node.content === 'string' ? node.content.trim()
		: node.content.type !== NodeTypes.INTERPOLATION ? node.content.content.trim()
		: null;

	if (!content) return null;

	logger.info(`Direct node content found: ${content}`);

	// Mustache構文のチェック
	const mustachePattern = /^\s*{{\s*(.*?)\s*}}\s*$/;
	const mustacheMatch = content.match(mustachePattern);

	if (mustacheMatch && mustacheMatch[1] && isI18nReference(mustacheMatch[1])) {
		const extractedContent = mustacheMatch[1].trim();
		logger.info(`Extracted i18n reference from mustache: ${extractedContent}`);
		return extractedContent;
	}

	// 直接i18n参照を含む場合
	if (isI18nReference(content)) {
		logger.info(`Direct i18n reference found: ${content}`);
		return '$\{' + content + '}';
	}

	// その他のコンテンツ
	return content;
}

/**
 * インターポレーションノード（Mustache）からコンテンツを抽出
 */
function extractInterpolationContent(children: TemplateChildNode[]): string | null {
	for (const child of children) {
		if (child.type === NodeTypes.INTERPOLATION) {
			logger.info(`Found interpolation node (Mustache): ${JSON.stringify(child.content).substring(0, 100)}...`);

			if (child.content && child.content.type === 4 && child.content.content) {
				const content = child.content.content.trim();
				logger.info(`Interpolation content: ${content}`);

				if (isI18nReference(content)) {
					return '$\{' + content + '}';
				}
			} else if (child.content && typeof child.content === 'object') {
				if (child.content.type == NodeTypes.COMPOUND_EXPRESSION) throw new Error("Unexpected COMPOUND_EXPRESSION");
				// オブジェクト形式のcontentを探索
				logger.info(`Complex interpolation node: ${JSON.stringify(child.content).substring(0, 100)}...`);

				if (child.content.content) {
					const content = child.content.content.trim();

					if (isI18nReference(content)) {
						logger.info(`Found i18n reference in complex interpolation: ${content}`);
						return '$\{' + content + '}';
					}
				}
			}
		}
	}

	return null;
}

/**
 * 式ノードからコンテンツを抽出
 */
function extractExpressionContent(children: TemplateChildNode[]): string | null {
	// i18n.ts. 参照パターンを持つものを優先
	for (const child of children) {
		if (child.type === NodeTypes.TEXT && child.content) {
			const expr = child.content.trim();

			if (isI18nReference(expr)) {
				logger.info(`Found i18n reference in expression node: ${expr}`);
				return '$\{' + expr + '}';
			}
		}
	}

	// その他の式
	for (const child of children) {
		if (child.type === NodeTypes.TEXT && child.content) {
			const expr = child.content.trim();
			logger.info(`Found expression: ${expr}`);
			return expr;
		}
	}

	return null;
}

/**
 * 子ノードを再帰的に探索してコンテンツを抽出
 */
function extractNestedContent(children: TemplateChildNode[]): string | null {
	for (const child of children) {
		if ('children' in child && Array.isArray(child.children) && child.children.length > 0) {
			const nestedContent = extractElementText(child);

			if (nestedContent) {
				logger.info(`Found nested content: ${nestedContent}`);
				return nestedContent;
			}
		} else if (child.type === NodeTypes.ELEMENT) {
			// childrenがなくても内部を調査
			const nestedContent = extractElementText(child);

			if (nestedContent) {
				logger.info(`Found content in childless element: ${nestedContent}`);
				return nestedContent;
			}
		}
	}

	return null;
}


/**
 * SearchLabelとSearchKeywordを探して抽出する関数
 */
function extractLabelsAndKeywords(nodes: TemplateChildNode[]): { label: string | null, keywords: string[] } {
	let label: string | null = null;
	const keywords: string[] = [];

	logger.info(`Extracting labels and keywords from ${nodes.length} nodes`);

	// 再帰的にSearchLabelとSearchKeywordを探索（ネストされたSearchMarkerは処理しない）
	function findComponents(nodes: TemplateChildNode[]) {
		for (const node of nodes) {
			if (node.type === NodeTypes.ELEMENT) {
				logger.info(`Checking element: ${node.tag}`);

				// SearchMarkerの場合は、その子要素は別スコープなのでスキップ
				if (node.tag === 'SearchMarker') {
					logger.info(`Found nested SearchMarker - skipping its content to maintain scope isolation`);
					continue; // このSearchMarkerの中身は処理しない (スコープ分離)
				}

				// SearchLabelの処理
				if (node.tag === 'SearchLabel') {
					logger.info(`Found SearchLabel node, structure: ${JSON.stringify(node).substring(0, 200)}...`);

					// まず完全なノード内容の抽出を試みる
					const content = extractElementText(node);
					if (content) {
						label = content;
						logger.info(`SearchLabel content extracted: ${content}`);
					} else {
						logger.info(`SearchLabel found but extraction failed, trying direct children inspection`);

						// バックアップ: 子直接確認 - type=5のMustacheインターポレーションを重点的に確認
						{
							for (const child of node.children) {
								// Mustacheインターポレーション
								if (child.type === NodeTypes.INTERPOLATION && child.content) {
									// content内の式を取り出す
									if (child.content.type == NodeTypes.COMPOUND_EXPRESSION) throw new Error("unexpected COMPOUND_EXPRESSION");
									const expression = child.content.content ||
										(child.content.type === 4 ? child.content.content : null) ||
										JSON.stringify(child.content);

									logger.info(`Interpolation expression: ${expression}`);
									if (typeof expression === 'string' && isI18nReference(expression)) {
										label = expression.trim();
										logger.info(`Found i18n in interpolation: ${label}`);
										break;
									}
								}
								// 式ノード
								else if (child.type === NodeTypes.TEXT && child.content && isI18nReference(child.content)) {
									label = child.content.trim();
									logger.info(`Found i18n in expression: ${label}`);
									break;
								}
							}
						}
					}
				}
				// SearchKeywordの処理
				else if (node.tag === 'SearchKeyword') {
					logger.info(`Found SearchKeyword node`);

					// まず完全なノード内容の抽出を試みる
					const content = extractElementText(node);
					if (content) {
						keywords.push(content);
						logger.info(`SearchKeyword content extracted: ${content}`);
					} else {
						logger.info(`SearchKeyword found but extraction failed, trying direct children inspection`);

						// バックアップ: 子直接確認 - type=5のMustacheインターポレーションを重点的に確認
						{
							for (const child of node.children) {
								// Mustacheインターポレーション
								if (child.type === NodeTypes.INTERPOLATION && child.content) {
									// content内の式を取り出す
									if (child.content.type == NodeTypes.COMPOUND_EXPRESSION) throw new Error("unexpected COMPOUND_EXPRESSION");
									const expression = child.content.content ||
										(child.content.type === 4 ? child.content.content : null) ||
										JSON.stringify(child.content);

									logger.info(`Keyword interpolation: ${expression}`);
									if (typeof expression === 'string' && isI18nReference(expression)) {
										const keyword = expression.trim();
										keywords.push(keyword);
										logger.info(`Found i18n keyword in interpolation: ${keyword}`);
										break;
									}
								}
								// 式ノード
								else if (child.type === NodeTypes.TEXT && child.content && isI18nReference(child.content)) {
									const keyword = child.content.trim();
									keywords.push(keyword);
									logger.info(`Found i18n keyword in expression: ${keyword}`);
									break;
								}
							}
						}
					}
				}

				// 子要素を再帰的に調査（ただしSearchMarkerは除外）
				if (node.children && Array.isArray(node.children)) {
					findComponents(node.children);
				}
			}
		}
	}

	findComponents(nodes);

	// デバッグ情報
	logger.info(`Extraction completed: label=${label}, keywords=[${keywords.join(', ')}]`);
	return { label, keywords };
}


function extractUsageInfoFromTemplateAst(
	templateAst: RootNode | undefined,
	id: string,
): SearchIndexItem[] {
	const allMarkers: SearchIndexItem[] = [];
	const markerMap = new Map<string, SearchIndexItem>();
	const childrenIds = new Set<string>();
	const normalizedId = id.replace(/\\/g, '/');

	if (!templateAst) return allMarkers;

	// マーカーの基本情報を収集
	function collectMarkers(node: TemplateChildNode | RootNode, parentId: string | null = null) {
		if (node.type === NodeTypes.ELEMENT && node.tag === 'SearchMarker') {
			// マーカーID取得
			const markerIdProp = node.props?.find(p => p.name === 'markerId');
			const markerId = markerIdProp?.type == NodeTypes.ATTRIBUTE ? markerIdProp.value?.content : null;

			// SearchMarkerにマーカーIDがない場合はエラー
			if (markerId == null) {
				logger.error(`Marker ID not found for node: ${JSON.stringify(node)}`);
				throw new Error(`Marker ID not found in file ${id}`);
			}

			// マーカー基本情報
			const markerInfo: SearchIndexItem = {
				id: markerId,
				parentId: parentId ?? undefined,
				label: '', // デフォルト値
				keywords: [],
			};

			// 静的プロパティを取得
			if (node.props && Array.isArray(node.props)) {
				for (const prop of node.props) {
					if (prop.type === 6 && prop.name && prop.name !== 'markerId') {
						if (prop.name === 'path') markerInfo.path = prop.value?.content || '';
						else if (prop.name === 'icon') markerInfo.icon = prop.value?.content || '';
						else if (prop.name === 'label') markerInfo.label = prop.value?.content || '';
					}
				}
			}

			// バインドプロパティを取得
			const bindings = extractNodeBindings(node);

			const assertString = (value: unknown, key: string): string => {
				if (typeof value !== 'string') throw new Error(`Invalid type for ${key} in marker ${markerId}: expected string, got ${typeof value}`);
				return value;
			}

			const assertStringArray = (value: unknown, key: string): string[] => {
				if (!Array.isArray(value) || !value.every(x => typeof x === 'string')) throw new Error(`Invalid type for ${key} in marker ${markerId}: expected string array`);
				return value;
			}

			if (bindings.path) markerInfo.path = assertString(bindings.path, 'path');
			if (bindings.icon) markerInfo.icon = assertString(bindings.icon, 'icon');
			if (bindings.label) markerInfo.label = assertString(bindings.label, 'label');
			if (bindings.inlining) {
				markerInfo.inlining = assertStringArray(bindings.inlining, 'inlining');
				logger.info(`Added inlining ${JSON.stringify(bindings.inlining)} to marker ${markerId}`);
			}
			if (bindings.keywords) {
				markerInfo.keywords = assertStringArray(bindings.keywords, 'keywords');
			}

			//pathがない場合はファイルパスを設定
			if (markerInfo.path == null && parentId == null) {
				markerInfo.path = normalizedId.match(/.*(\/(admin|settings)\/[^\/]+)\.vue$/)?.[1];
			}

			// SearchLabelとSearchKeywordを抽出 (AST全体を探索)
			if (node.children && Array.isArray(node.children)) {
				logger.info(`Processing marker ${markerId} for labels and keywords`);
				const extracted = extractLabelsAndKeywords(node.children);

				// SearchLabelからのラベル取得は最優先で適用
				if (extracted.label) {
					markerInfo.label = extracted.label;
					logger.info(`Using extracted label for ${markerId}: ${extracted.label}`);
				} else if (markerInfo.label) {
					logger.info(`Using existing label for ${markerId}: ${markerInfo.label}`);
				} else {
					markerInfo.label = 'Unnamed marker';
					logger.info(`No label found for ${markerId}, using default`);
				}

				// SearchKeywordからのキーワード取得を追加
				if (extracted.keywords.length > 0) {
					const existingKeywords = Array.isArray(markerInfo.keywords) ?
						[...markerInfo.keywords] :
						(markerInfo.keywords ? [markerInfo.keywords] : []);

					// i18n参照のキーワードは最優先で追加
					const combinedKeywords = [...existingKeywords];
					for (const kw of extracted.keywords) {
						combinedKeywords.push(kw);
						logger.info(`Added extracted keyword to ${markerId}: ${kw}`);
					}

					markerInfo.keywords = combinedKeywords;
				}
			}

			// マーカーを登録
			markerMap.set(markerId, markerInfo);
			allMarkers.push(markerInfo);

			// 親子関係を記録
			if (parentId) {
				const parent = markerMap.get(parentId);
				if (parent) {
					childrenIds.add(markerId);
				}
			}

			// 子ノードを処理
			for (const child of node.children) {
				collectMarkers(child, markerId);
			}

			return markerId;
		}
		// SearchMarkerでない場合は再帰的に子ノードを処理
		else if ('children' in node && Array.isArray(node.children)) {
			for (const child of node.children) {
				if (typeof child == 'object' && child.type !== NodeTypes.SIMPLE_EXPRESSION) {
					collectMarkers(child, parentId);
				}
			}
		}

		return null;
	}

	// AST解析開始
	collectMarkers(templateAst);
	return allMarkers;
}

type Bindings = Partial<Record<keyof SearchIndexItem, unknown>>;
// バインドプロパティの処理を修正する関数
function extractNodeBindings(node: TemplateChildNode | RootNode): Bindings {
	const bindings: Bindings = {};

	if (node.type !== NodeTypes.ELEMENT) return bindings;

	// バインド式を収集
	for (const prop of node.props) {
		if (prop.type === NodeTypes.DIRECTIVE && prop.name === 'bind' && prop.arg && 'content' in prop.arg) {
			const propName = prop.arg.content;
			if (prop.exp?.type === NodeTypes.COMPOUND_EXPRESSION) throw new Error('unexpected COMPOUND_EXPRESSION');
			const propContent = prop.exp?.content || '';

			logger.info(`Processing bind prop ${propName}: ${propContent}`);

			bindings[propName] = evalExpression(propContent);
		}
	}

	return bindings;
}

/**
 * expr を実行します。
 * i18n はそのアクセスを保持するために propertyAccessProxy を使用しています。
 */
function evalExpression(expr: string): unknown {
	const rarResult = Function('i18n', `return ${expr}`)(i18nProxy);
	// JSON.stringify を一回通すことで、 AccessProxy を文字列に変換する
	// Walk してもいいんだけど横着してJSON.stringifyしてる。ビルド時にしか通らないのであんまりパフォーマンス気にする必要ないんで
	return JSON.parse(JSON.stringify(rarResult));
}

const propertyAccessProxySymbol = Symbol('propertyAccessProxySymbol');

type AccessProxy = {
	[propertyAccessProxySymbol]: string[],
	[k: string]: AccessProxy,
}

const propertyAccessProxyHandler: ProxyHandler<AccessProxy> = {
	get(target: AccessProxy, p: string | symbol): any {
		if (p in target) {
			return (target as any)[p];
		}
		if (p == "toJSON" || p == Symbol.toPrimitive) {
			return propertyAccessProxyToJSON;
		}
		if (typeof p == 'string') {
			return target[p] = propertyAccessProxy([...target[propertyAccessProxySymbol], p]);
		}
		return undefined;
	}
}

function propertyAccessProxyToJSON(this: AccessProxy, hint: string) {
	const expression = this[propertyAccessProxySymbol].reduce((prev, current) => {
		if (current.match(/^[a-z][0-9a-z]*$/i)) {
			return `${prev}.${current}`;
		} else {
			return `${prev}['${current}']`;
		}
	});
	return '$\{' + expression + '}';
}

/**
 * プロパティのアクセスを保持するための Proxy オブジェクトを作成します。
 *
 * この関数で生成した proxy は JSON でシリアライズするか、`${}`のように string にすると、 ${property.path} のような形になる。
 * @param path
 */
function propertyAccessProxy(path: string[]): AccessProxy {
	const target: AccessProxy = {
		[propertyAccessProxySymbol]: path,
	};
	return new Proxy(target, propertyAccessProxyHandler);
}

const i18nProxy = propertyAccessProxy(['i18n']);

export function collectFileMarkers(id: string, code: string): SearchIndexItem[] {
	try {
		const { descriptor, errors } = vueSfcParse(code, {
			filename: id,
		});

		if (errors.length > 0) {
			logger.error(`Compile Error: ${id}, ${errors}`);
			return []; // エラーが発生したファイルはスキップ
		}

		const fileMarkers = extractUsageInfoFromTemplateAst(descriptor.template?.ast, id);

		if (fileMarkers && fileMarkers.length > 0) {
			logger.info(`Successfully extracted ${fileMarkers.length} markers from ${id}`);
		} else {
			logger.info(`No markers found in ${id}`);
		}
		return fileMarkers;
	} catch (error) {
		logger.error(`Error analyzing file ${id}:`, error);
	}

	return [];
}

type TransformedCode = {
	code: string,
	map: SourceMap,
};

export class MarkerIdAssigner {
	// key: file id
	private cache: Map<string, TransformedCode>;

	constructor() {
		this.cache = new Map();
	}

	public onInvalidate(id: string) {
		this.cache.delete(id);
	}

	public processFile(id: string, code: string): TransformedCode {
		// try cache first
		if (this.cache.has(id)) {
			return this.cache.get(id)!;
		}
		const transformed = this.#processImpl(id, code);
		this.cache.set(id, transformed);
		return transformed;
	}

	#processImpl(id: string, code: string): TransformedCode {
		const s = new MagicString(code); // magic-string のインスタンスを作成

		const parsed = vueSfcParse(code, { filename: id });
		if (!parsed.descriptor.template) {
			return {
				code,
				map: s.generateMap({ source: id, includeContent: true }),
			};
		}
		const ast = parsed.descriptor.template.ast; // テンプレート AST を取得
		const markerRelations: MarkerRelation[] = []; //  MarkerRelation 配列を初期化

		if (!ast) {
			return {
				code: s.toString(), // 変更後のコードを返す
				map: s.generateMap({ source: id, includeContent: true }), // ソースマップも生成 (sourceMap: true が必要)
			};
		}

		type SearchMarkerElementNode = ElementNode & {
			__markerId?: string,
			__children?: string[],
		};

		function traverse(node: RootNode | TemplateChildNode | SimpleExpressionNode | CompoundExpressionNode, currentParent?: SearchMarkerElementNode) {
			if (node.type === NodeTypes.ELEMENT && node.tag === 'SearchMarker') {
				// 行番号はコード先頭からの改行数で取得
				const lineNumber = code.slice(0, node.loc.start.offset).split('\n').length;
				// ファイルパスと行番号からハッシュ値を生成
				// この際実行環境で差が出ないようにファイルパスを正規化
				const idKey = id.replace(/\\/g, '/').split('packages/frontend/')[1]
				const generatedMarkerId = toBase62(hash(`${idKey}:${lineNumber}`));

				const props = node.props || [];
				const hasMarkerIdProp = props.some((prop) => prop.type === NodeTypes.ATTRIBUTE && prop.name === 'markerId');
				const nodeMarkerId = hasMarkerIdProp
					? props.find((prop): prop is AttributeNode => prop.type === NodeTypes.ATTRIBUTE && prop.name === 'markerId')?.value?.content as string
					: generatedMarkerId;
				(node as SearchMarkerElementNode).__markerId = nodeMarkerId;

				// 子マーカーの場合、親ノードに __children を設定しておく
				if (currentParent) {
					currentParent.__children = currentParent.__children || [];
					currentParent.__children.push(nodeMarkerId);
				}

				const parentMarkerId = currentParent && currentParent.__markerId;
				markerRelations.push({
					parentId: parentMarkerId,
					markerId: nodeMarkerId,
					node: node,
				});

				if (!hasMarkerIdProp) {
					const nodeStart = node.loc.start.offset;
					let endOfStartTag;

					if (node.children && node.children.length > 0) {
						// 子要素がある場合、最初の子要素の開始位置を基準にする
						endOfStartTag = code.lastIndexOf('>', node.children[0].loc.start.offset);
					} else if (node.loc.end.offset > nodeStart) {
						// 子要素がない場合、自身の終了位置から逆算
						const nodeSource = code.substring(nodeStart, node.loc.end.offset);
						// 自己終了タグか通常の終了タグかを判断
						if (nodeSource.includes('/>')) {
							endOfStartTag = code.indexOf('/>', nodeStart) - 1;
						} else {
							endOfStartTag = code.indexOf('>', nodeStart);
						}
					}

					if (endOfStartTag !== undefined && endOfStartTag !== -1) {
						// markerId が既に存在しないことを確認
						const tagText = code.substring(nodeStart, endOfStartTag + 1);
						const markerIdRegex = /\s+markerId\s*=\s*["'][^"']*["']/;

						if (!markerIdRegex.test(tagText)) {
							s.appendRight(endOfStartTag, ` markerId="${generatedMarkerId}" data-in-app-search-marker-id="${generatedMarkerId}"`);
							logger.info(`Adding markerId="${generatedMarkerId}" to ${id}:${lineNumber}`);
						} else {
							logger.info(`markerId already exists in ${id}:${lineNumber}`);
						}
					}
				}
			}

			const newParent: SearchMarkerElementNode | undefined = node.type === NodeTypes.ELEMENT && node.tag === 'SearchMarker' ? node : currentParent;
			if ('children' in node) {
				for (const child of node.children) {
					if (typeof child == 'object') {
						traverse(child, newParent);
					}
				}
			}
		}

		traverse(ast); // AST を traverse (1段階目: ID 生成と親子関係記録)

		// 2段階目: :children 属性の追加
		// 最初に親マーカーごとに子マーカーIDを集約する処理を追加
		const parentChildrenMap = new Map<string, string[]>();

		// 1. まず親ごとのすべての子マーカーIDを収集
		markerRelations.forEach(relation => {
			if (relation.parentId) {
				if (!parentChildrenMap.has(relation.parentId)) {
					parentChildrenMap.set(relation.parentId, []);
				}
				parentChildrenMap.get(relation.parentId)?.push(relation.markerId);
			}
		});

		// 2. 親ごとにまとめて :children 属性を処理
		for (const [parentId, childIds] of parentChildrenMap.entries()) {
			const parentRelation = markerRelations.find(r => r.markerId === parentId);
			if (!parentRelation || !parentRelation.node) continue;

			const parentNode = parentRelation.node;
			const childrenProp = parentNode.props?.find((prop): prop is DirectiveNode =>
				prop.type === NodeTypes.DIRECTIVE &&
				prop.name === 'bind' &&
				prop.arg?.type === NodeTypes.SIMPLE_EXPRESSION &&
				prop.arg.content === 'children');

			// 親ノードの開始位置を特定
			const parentNodeStart = parentNode.loc!.start.offset;
			const endOfParentStartTag = parentNode.children && parentNode.children.length > 0
				? code.lastIndexOf('>', parentNode.children[0].loc!.start.offset)
				: code.indexOf('>', parentNodeStart);

			if (endOfParentStartTag === -1) continue;

			// 親タグのテキストを取得
			const parentTagText = code.substring(parentNodeStart, endOfParentStartTag + 1);

			if (childrenProp) {
				// AST で :children 属性が検出された場合、それを更新
				try {
					const childrenStart = code.indexOf('[', childrenProp.exp!.loc.start.offset);
					const childrenEnd = code.indexOf(']', childrenProp.exp!.loc.start.offset);
					if (childrenStart !== -1 && childrenEnd !== -1) {
						const childrenArrayStr = code.slice(childrenStart, childrenEnd + 1);
						let childrenArray = JSON5.parse(childrenArrayStr.replace(/'/g, '"'));

						// 新しいIDを追加（重複は除外）
						const newIds = childIds.filter(id => !childrenArray.includes(id));
						if (newIds.length > 0) {
							childrenArray = [...childrenArray, ...newIds];
							const updatedChildrenArrayStr = JSON5.stringify(childrenArray).replace(/"/g, "'");
							s.overwrite(childrenStart, childrenEnd + 1, updatedChildrenArrayStr);
							logger.info(`Added ${newIds.length} child markerIds to existing :children in ${id}`);
						}
					}
				} catch (e) {
					logger.error('Error updating :children attribute:', e);
				}
			} else {
				// AST では検出されなかった場合、タグテキストを調べる
				const childrenRegex = /:children\s*=\s*["']\[(.*?)\]["']/;
				const childrenMatch = parentTagText.match(childrenRegex);

				if (childrenMatch) {
					// テキストから :children 属性値を解析して更新
					try {
						const childrenContent = childrenMatch[1];
						const childrenArrayStr = `[${childrenContent}]`;
						const childrenArray = JSON5.parse(childrenArrayStr.replace(/'/g, '"'));

						// 新しいIDを追加（重複は除外）
						const newIds = childIds.filter(id => !childrenArray.includes(id));
						if (newIds.length > 0) {
							childrenArray.push(...newIds);

							// :children="[...]" の位置を特定して上書き
							const attrStart = parentTagText.indexOf(':children=');
							if (attrStart > -1) {
								const attrValueStart = parentTagText.indexOf('[', attrStart);
								const attrValueEnd = parentTagText.indexOf(']', attrValueStart) + 1;
								if (attrValueStart > -1 && attrValueEnd > -1) {
									const absoluteStart = parentNodeStart + attrValueStart;
									const absoluteEnd = parentNodeStart + attrValueEnd;
									const updatedArrayStr = JSON5.stringify(childrenArray).replace(/"/g, "'");
									s.overwrite(absoluteStart, absoluteEnd, updatedArrayStr);
									logger.info(`Updated existing :children in tag text for ${id}`);
								}
							}
						}
					} catch (e) {
						logger.error('Error updating :children in tag text:', e);
					}
				} else {
					// :children 属性がまだない場合、新規作成
					s.appendRight(endOfParentStartTag, ` :children="${JSON5.stringify(childIds).replace(/"/g, "'")}"`);
					logger.info(`Created new :children attribute with ${childIds.length} markerIds in ${id}`);
				}
			}
		}

		return {
			code: s.toString(), // 変更後のコードを返す
			map: s.generateMap({ source: id, includeContent: true }), // ソースマップも生成 (sourceMap: true が必要)
		};
	}

	async getOrLoad(id: string) {
		// if there already exists a cache, return it
		// note cahce will be invalidated on file change so the cache must be up to date
		let code = this.getCached(id)?.code;
		if (code != null) {
			return code;
		}

		// if no cache found, read and parse the file
		const originalCode = await fs.promises.readFile(id, 'utf-8');

		// Other code may already parsed the file while we were waiting for the file to be read so re-check the cache
		code = this.getCached(id)?.code;
		if (code != null) {
			return code;
		}

		// parse the file
		code = this.processFile(id, originalCode)?.code;
		return code;
	}

	getCached(id: string) {
		return this.cache.get(id);
	}
}

// Rollup プラグインとして export
export default function pluginCreateSearchIndex(options: Options): PluginOption {
	const assigner = new MarkerIdAssigner();
	return [
		createSearchIndex(options, assigner),
		pluginCreateSearchIndexVirtualModule(options, assigner),
	]
}

function createSearchIndex(options: Options, assigner: MarkerIdAssigner): Plugin {
	initLogger(options); // ロガーを初期化
	const root = normalizePath(process.cwd());

	function isTargetFile(id: string): boolean {
		const relativePath = path.posix.relative(root, id);
		return options.targetFilePaths.some(pat => minimatch(relativePath, pat))
	}

	return {
		name: 'autoAssignMarkerId',
		enforce: 'pre',

		watchChange(id) {
			assigner.onInvalidate(id);
		},

		async transform(code, id) {
			if (!id.endsWith('.vue')) {
				return;
			}

			if (!isTargetFile(id)) {
				return;
			}

			return assigner.processFile(id, code);
		},
	};
}

export function pluginCreateSearchIndexVirtualModule(options: Options, asigner: MarkerIdAssigner): Plugin {
	const searchIndexPrefix = options.fileVirtualModulePrefix ?? 'search-index-individual:';
	const searchIndexSuffix = options.fileVirtualModuleSuffix ?? '.ts';
	const allSearchIndexFile = options.mainVirtualModule;
	const root = normalizePath(process.cwd());

	function isTargetFile(id: string): boolean {
		const relativePath = path.posix.relative(root, id);
		return options.targetFilePaths.some(pat => minimatch(relativePath, pat))
	}

	function parseSearchIndexFileId(id: string): string | null {
		const noQuery = id.split('?')[0];
		if (noQuery.startsWith(searchIndexPrefix) && noQuery.endsWith(searchIndexSuffix)) {
			const filePath = id.slice(searchIndexPrefix.length).slice(0, -searchIndexSuffix.length);
			if (isTargetFile(filePath)) {
				return filePath;
			}
		}
		return null;
	}

	return {
		name: 'generateSearchIndexVirtualModule',
		// hotUpdate hook を vite:vue よりもあとに実行したいため enforce: post
		enforce: 'post',

		async resolveId(id) {
			if (id == allSearchIndexFile) {
				return '\0' + allSearchIndexFile;
			}

			const searchIndexFilePath = parseSearchIndexFileId(id);
			if (searchIndexFilePath != null) {
				return id;
			}
			return undefined;
		},

		async load(id) {
			if (id == '\0' + allSearchIndexFile) {
				const files = await Promise.all(options.targetFilePaths.map(async (filePathPattern) => await glob(filePathPattern))).then(paths => paths.flat());
				let generatedFile = '';
				let arrayElements = '';
				for (let file of files) {
					const normalizedRelative = normalizePath(file);
					const absoluteId = normalizePath(path.join(process.cwd(), normalizedRelative)) + searchIndexSuffix;
					const variableName = normalizedRelative.replace(/[\/.-]/g, '_');
					generatedFile += `import { searchIndexes as ${variableName} } from '${searchIndexPrefix}${absoluteId}';\n`;
					arrayElements += `  ...${variableName},\n`;
				}
				generatedFile += `export let searchIndexes = [\n${arrayElements}];\n`;
				return generatedFile;
			}

			const searchIndexFilePath = parseSearchIndexFileId(id);
			if (searchIndexFilePath != null) {
				// call load to update the index file when the file is changed
				this.addWatchFile(searchIndexFilePath);

				const code = await asigner.getOrLoad(searchIndexFilePath);
				return generateJavaScriptCode(collectFileMarkers(id, code));
			}
			return null;
		},

		hotUpdate(this: { environment: { moduleGraph: EnvironmentModuleGraph } }, { file, modules }) {
			if (isTargetFile(file)) {
				const updateMods = options.modulesToHmrOnUpdate.map(id => this.environment.moduleGraph.getModuleById(path.posix.join(root, id))).filter(x => x != null);
				return [...modules, ...updateMods];
			}
			return modules;
		}
	};
}

// i18n参照を検出するためのヘルパー関数を追加
function isI18nReference(text: string | null | undefined): boolean {
	if (!text) return false;
	// ドット記法（i18n.ts.something）
	const dotPattern = /i18n\.ts\.\w+/;
	// ブラケット記法（i18n.ts['something']）
	const bracketPattern = /i18n\.ts\[['"][^'"]+['"]\]/;
	return dotPattern.test(text) || bracketPattern.test(text);
}