import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

export interface RiskThresholds {
  maxPositionSize: number;
  maxDailyLoss: number;
  maxPortfolioRisk: number;
  volatilityLimit: number;
}

export interface RiskEvaluation {
  symbol: string;
  positionValue: number;
  positionRisk: number;
  violations: string[];
  riskLevel: 'LOW' | 'MEDIUM' | 'HIGH';
}

export interface MarketData {
  symbol: string;
  price: number;
  change: number;
  changePercent: number;
  volume: number;
  timestamp: string;
}

@Injectable({
  providedIn: 'root'
})
export class ApiService {
  private readonly baseUrls = {
    riskGuardian: 'http://localhost:3002',
    strategyOrchestrator: 'http://localhost:3003',
    marketDataGateway: 'http://localhost:3001'
  };

  constructor(private http: HttpClient) {}

  // Risk Guardian API
  getRiskThresholds(): Observable<{ success: boolean; data: RiskThresholds }> {
    return this.http.get<{ success: boolean; data: RiskThresholds }>(
      `${this.baseUrls.riskGuardian}/api/risk/thresholds`
    );
  }

  updateRiskThresholds(thresholds: RiskThresholds): Observable<{ success: boolean; data: RiskThresholds }> {
    return this.http.put<{ success: boolean; data: RiskThresholds }>(
      `${this.baseUrls.riskGuardian}/api/risk/thresholds`,
      thresholds
    );
  }

  evaluateRisk(params: {
    symbol: string;
    quantity: number;
    price: number;
    portfolioValue: number;
  }): Observable<{ success: boolean; data: RiskEvaluation }> {
    return this.http.post<{ success: boolean; data: RiskEvaluation }>(
      `${this.baseUrls.riskGuardian}/api/risk/evaluate`,
      params
    );
  }

  getRiskHistory(): Observable<{ success: boolean; data: RiskEvaluation[] }> {
    return this.http.get<{ success: boolean; data: RiskEvaluation[] }>(
      `${this.baseUrls.riskGuardian}/api/risk/history`
    );
  }

  // Strategy Orchestrator API
  getStrategies(): Observable<{ success: boolean; data: any[] }> {
    return this.http.get<{ success: boolean; data: any[] }>(
      `${this.baseUrls.strategyOrchestrator}/api/strategies`
    );
  }

  createStrategy(strategy: any): Observable<{ success: boolean; data: any }> {
    return this.http.post<{ success: boolean; data: any }>(
      `${this.baseUrls.strategyOrchestrator}/api/strategies`,
      strategy
    );
  }
  // Market Data Gateway API
  getMarketData(symbols: string[] = ['AAPL', 'GOOGL', 'MSFT', 'TSLA', 'AMZN']): Observable<{ success: boolean; data: MarketData[] }> {
    const symbolsParam = symbols.join(',');
    return this.http.get<{ success: boolean; data: MarketData[] }>(
      `${this.baseUrls.marketDataGateway}/api/market-data?symbols=${symbolsParam}`
    );
  }

  // Health checks
  checkServiceHealth(service: 'riskGuardian' | 'strategyOrchestrator' | 'marketDataGateway'): Observable<any> {
    return this.http.get(`${this.baseUrls[service]}/health`);
  }
}