/*
 * Copyright (c) 2024-2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Scene } from '../Scene';
import { ArkClass } from '../core/model/ArkClass';
import { ArkMethod } from '../core/model/ArkMethod';
import { ClassSignature, MethodSignature } from '../core/model/ArkSignature';
import Logger, { LOG_MODULE_TYPE } from './logger';
import { ModelUtils } from '../core/common/ModelUtils';

const logger = Logger.getLogger(LOG_MODULE_TYPE.ARKANALYZER, 'callGraphUtils');

export class MethodSignatureManager {
    private _workList: MethodSignature[] = [];
    private _processedList: MethodSignature[] = [];

    get workList(): MethodSignature[] {
        return this._workList;
    }

    set workList(list: MethodSignature[]) {
        this._workList = list;
    }

    get processedList(): MethodSignature[] {
        return this._processedList;
    }

    set processedList(list: MethodSignature[]) {
        this._processedList = list;
    }

    public findInWorkList(signature: MethodSignature): MethodSignature | undefined {
        return this.workList.find(item => item === signature);
    }

    public findInProcessedList(signature: MethodSignature): boolean {
        let result = this.processedList.find(item => item.toString() === signature.toString());
        return typeof result !== 'undefined';
    }

    public addToWorkList(signature: MethodSignature): void {
        if (!isItemRegistered<MethodSignature>(signature, this.workList, (a, b) => a.toString() === b.toString())) {
            this.workList.push(signature);
        }
    }

    public addToProcessedList(signature: MethodSignature): void {
        if (!isItemRegistered<MethodSignature>(signature, this.processedList, (a, b) => a === b)) {
            this.processedList.push(signature);
        }
    }

    public removeFromWorkList(signature: MethodSignature): void {
        this.workList = this.workList.filter(item => item !== signature);
    }

    public removeFromProcessedList(signature: MethodSignature): void {
        this.processedList = this.processedList.filter(item => item.toString() !== signature.toString());
    }
}

export class SceneManager {
    private _scene!: Scene;

    get scene(): Scene {
        return this._scene;
    }

    set scene(value: Scene) {
        this._scene = value;
    }

    public getMethod(method: MethodSignature): ArkMethod | null {
        let targetMethod = this._scene.getMethod(method);
        if (targetMethod != null) {
            return targetMethod;
        }
        // 支持SDK调用解析
        let file = this._scene.getFile(method.getDeclaringClassSignature().getDeclaringFileSignature());
        if (file) {
            const methods = ModelUtils.getAllMethodsInFile(file);
            for (let methodUnderFile of methods) {
                if (method.toString() === methodUnderFile.getSignature().toString()) {
                    return methodUnderFile;
                }
            }
        }
        return targetMethod;
    }

    public getClass(arkClass: ClassSignature): ArkClass | null {
        if (typeof arkClass.getClassName() === 'undefined') {
            return null;
        }
        let classInstance = this._scene.getClass(arkClass);
        if (classInstance != null) {
            return classInstance;
        }
        let sdkOrTargetProjectFile = this._scene.getFile(arkClass.getDeclaringFileSignature());
        // TODO: support get sdk class, targetProject class waiting to be supported
        if (sdkOrTargetProjectFile != null) {
            for (let classUnderFile of ModelUtils.getAllClassesInFile(sdkOrTargetProjectFile)) {
                if (classUnderFile.getSignature().toString() === arkClass.toString()) {
                    return classUnderFile;
                }
            }
        }
        return classInstance;
    }

    public getExtendedClasses(arkClass: ClassSignature): ArkClass[] {
        let sourceClass = this.getClass(arkClass);
        let classList = [sourceClass]; // 待处理类
        let extendedClasses: ArkClass[] = []; // 已经处理的类

        while (classList.length > 0) {
            let tempClass = classList.shift();
            if (tempClass == null) {
                continue;
            }
            let firstLevelSubclasses: ArkClass[] = Array.from(tempClass.getExtendedClasses().values());

            if (!firstLevelSubclasses) {
                continue;
            }

            for (let subclass of firstLevelSubclasses) {
                if (!isItemRegistered<ArkClass>(subclass, extendedClasses, (a, b) => a.getSignature().toString() === b.getSignature().toString())) {
                    // 子类未处理，加入到classList
                    classList.push(subclass);
                }
            }

            // 当前类处理完毕，标记为已处理
            if (!isItemRegistered<ArkClass>(tempClass, extendedClasses, (a, b) => a.getSignature().toString() === b.getSignature().toString())) {
                extendedClasses.push(tempClass);
            }
        }
        return extendedClasses;
    }
}

export function isItemRegistered<T>(item: T, array: T[], compareFunc: (a: T, b: T) => boolean): boolean {
    for (let tempItem of array) {
        if (compareFunc(tempItem, item)) {
            return true;
        }
    }
    return false;
}

export function splitStringWithRegex(input: string): string[] {
    // 正则表达式匹配 "a.b.c()" 并捕获 "a" "b" "c"
    const regex = /^(\w+)\.(\w+)\.(\w+)\(\)$/;
    const match = input.match(regex);

    if (match) {
        // 返回捕获的部分，忽略整个匹配结果
        return match.slice(1);
    } else {
        // 如果输入不匹配，返回空数组
        return [];
    }
}

export function printCallGraphDetails(methods: Set<MethodSignature>, calls: Map<MethodSignature, MethodSignature[]>, rootDir: string): void {
    // 打印 Methods
    logger.info('Call Graph:\n');
    logger.info('\tMethods:');
    methods.forEach(method => {
        logger.info(`\t\t${method}`);
    });

    // 打印 Calls
    logger.info('\tCalls:');
    const arrow = '->';
    calls.forEach((calledMethods, method) => {
        // 对于每个调用源，只打印一次调用源和第一个目标方法
        const modifiedMethodName = `<${method}`;
        logger.info(`\t\t${modifiedMethodName.padEnd(4)}   ${arrow}`);

        for (let i = 0; i < calledMethods.length; i++) {
            const modifiedCalledMethod = `\t\t<${calledMethods[i]}`;
            logger.info(`\t\t${modifiedCalledMethod}`);
        }
        logger.info('\n');
    });
}

export function extractLastBracketContent(input: string): string {
    // 正则表达式匹配最后一个尖括号内的内容，直到遇到左圆括号
    const match = input.match(/<([^<>]*)\(\)>$/);
    if (match && match[1]) {
        return match[1].trim();
    }
    return '';
}