import type { ProjectInfo } from './ProjectAnalyzer';

export class PerformanceOptimizer {
    private parseCache: Map<string, any> = new Map();
    private stringifyCache: Map<string, string> = new Map();
    private metrics: {
        parseTime: number[];
        stringifyTime: number[];
        cacheHits: number;
        cacheMisses: number;
    } = {
        parseTime: [],
        stringifyTime: [],
        cacheHits: 0,
        cacheMisses: 0
    };

    async optimize(projectInfo: ProjectInfo) {
        // 根据项目类型和框架选择最优策略
        this.configureOptimizations(projectInfo);
    }

    private configureOptimizations(projectInfo: ProjectInfo) {
        switch (projectInfo.type) {
            case 'frontend':
                this.configureFrontendOptimizations(projectInfo.framework);
                break;
            case 'backend':
                this.configureBackendOptimizations(projectInfo.framework);
                break;
            case 'fullstack':
                this.configureFullstackOptimizations(projectInfo.framework);
                break;
        }
    }

    optimizedParse(data: string) {
        const start = performance.now();
        
        // 检查缓存
        const cached = this.parseCache.get(data);
        if (cached) {
            this.metrics.cacheHits++;
            return cached;
        }

        this.metrics.cacheMisses++;
        
        try {
            const result = JSON.parse(data);
            this.parseCache.set(data, result);
            
            const end = performance.now();
            this.metrics.parseTime.push(end - start);
            
            return result;
        } catch (error) {
            console.error('Parse error:', error);
            throw error;
        }
    }

    optimizedStringify(data: any) {
        const start = performance.now();
        
        // 生成缓存键
        const cacheKey = JSON.stringify(data);
        
        // 检查缓存
        const cached = this.stringifyCache.get(cacheKey);
        if (cached) {
            this.metrics.cacheHits++;
            return cached;
        }

        this.metrics.cacheMisses++;
        
        try {
            const result = JSON.stringify(data);
            this.stringifyCache.set(cacheKey, result);
            
            const end = performance.now();
            this.metrics.stringifyTime.push(end - start);
            
            return result;
        } catch (error) {
            console.error('Stringify error:', error);
            throw error;
        }
    }

    generateReport() {
        const avgParseTime = this.metrics.parseTime.reduce((a, b) => a + b, 0) / this.metrics.parseTime.length;
        const avgStringifyTime = this.metrics.stringifyTime.reduce((a, b) => a + b, 0) / this.metrics.stringifyTime.length;

        return {
            averageParseTime: avgParseTime,
            averageStringifyTime: avgStringifyTime,
            cacheHitRate: this.metrics.cacheHits / (this.metrics.cacheHits + this.metrics.cacheMisses),
            totalOperations: this.metrics.cacheHits + this.metrics.cacheMisses
        };
    }

    private configureFrontendOptimizations(framework: string) {
        // 前端特定优化
    }

    private configureBackendOptimizations(framework: string) {
        // 后端特定优化
    }

    private configureFullstackOptimizations(framework: string) {
        // 全栈特定优化
    }
}