/**
 * Modern Analytics Service for Web3.js v2 (2025)
 */

import type { Address } from '@solana/addresses';
import type { Rpc, SolanaRpcApi } from '@solana/rpc';
import type { Commitment } from '@solana/rpc-types';

/**
 * Analytics metrics
 */
export interface IAnalyticsMetrics {
  totalTransactions: number;
  totalVolume: bigint;
  averageTransactionSize: bigint;
  successRate: number;
  activeAgents: number;
}

/**
 * Time series data point
 */
export interface ITimeSeriesData {
  timestamp: number;
  value: number;
  label: string;
}

/**
 * Agent performance data
 */
export interface IAgentPerformance {
  agentId: Address;
  totalJobs: number;
  successRate: number;
  averageResponseTime: number;
  earnings: bigint;
  rating: number;
}

/**
 * Modern Analytics Service
 */
export class AnalyticsService {
  constructor(
    private readonly rpc: Rpc<SolanaRpcApi>,
    private readonly commitment: Commitment = 'confirmed'
  ) {}

  /**
   * Get platform analytics
   */
  async getPlatformAnalytics(
    timeframe: '24h' | '7d' | '30d' = '24h'
  ): Promise<IAnalyticsMetrics> {
    try {
      console.log(`📊 Getting platform analytics for ${timeframe}`);

      // Simulate analytics data retrieval
      await new Promise(resolve => setTimeout(resolve, 1000));

      const baseMetrics = {
        '24h': {
          totalTransactions: 1234,
          totalVolume: BigInt(50000000000), // 50 SOL
          averageTransactionSize: BigInt(40485829), // ~0.04 SOL
          successRate: 0.987,
          activeAgents: 156,
        },
        '7d': {
          totalTransactions: 8642,
          totalVolume: BigInt(342000000000), // 342 SOL
          averageTransactionSize: BigInt(39562841),
          successRate: 0.982,
          activeAgents: 298,
        },
        '30d': {
          totalTransactions: 35678,
          totalVolume: BigInt(1456000000000), // 1,456 SOL
          averageTransactionSize: BigInt(40821347),
          successRate: 0.979,
          activeAgents: 445,
        },
      };

      return baseMetrics[timeframe];
    } catch (error) {
      throw new Error(`Failed to get platform analytics: ${String(error)}`);
    }
  }

  /**
   * Get transaction volume over time
   */
  async getVolumeTimeSeries(
    timeframe: '24h' | '7d' | '30d' = '7d'
  ): Promise<ITimeSeriesData[]> {
    try {
      console.log(`📈 Getting volume time series for ${timeframe}`);

      // Simulate time series data
      await new Promise(resolve => setTimeout(resolve, 800));

      const dataPoints = timeframe === '24h' ? 24 : timeframe === '7d' ? 7 : 30;
      const now = Date.now();
      const interval =
        timeframe === '24h'
          ? 3600000
          : timeframe === '7d'
            ? 86400000
            : 86400000;

      return Array.from({ length: dataPoints }, (_, i) => ({
        timestamp: now - (dataPoints - 1 - i) * interval,
        value: Math.floor(Math.random() * 1000000000) + 500000000, // 0.5-1.5 SOL
        label: `Point ${i + 1}`,
      }));
    } catch (error) {
      throw new Error(`Failed to get volume time series: ${String(error)}`);
    }
  }

  /**
   * Get top performing agents
   */
  async getTopAgents(limit: number = 10): Promise<IAgentPerformance[]> {
    try {
      console.log(`🏆 Getting top ${limit} performing agents`);

      // Simulate top agents data
      await new Promise(resolve => setTimeout(resolve, 600));

      return Array.from({ length: Math.min(limit, 20) }, (_, i) => ({
        agentId: `agent_${i + 1}_${Date.now()}` as Address,
        totalJobs: Math.floor(Math.random() * 500) + 100,
        successRate: 0.85 + Math.random() * 0.14, // 85-99%
        averageResponseTime: Math.random() * 5 + 0.5, // 0.5-5.5 hours
        earnings: BigInt(Math.floor(Math.random() * 50000000000) + 1000000000), // 1-50 SOL
        rating: 3.5 + Math.random() * 1.5, // 3.5-5.0
      }));
    } catch (error) {
      throw new Error(`Failed to get top agents: ${String(error)}`);
    }
  }

  /**
   * Get agent specific analytics
   */
  async getAgentAnalytics(agentId: Address): Promise<{
    performance: IAgentPerformance;
    recentActivity: ITimeSeriesData[];
    earnings: { daily: bigint; weekly: bigint; monthly: bigint };
  }> {
    try {
      console.log(`📋 Getting analytics for agent ${agentId}`);

      await new Promise(resolve => setTimeout(resolve, 1200));

      const performance: IAgentPerformance = {
        agentId,
        totalJobs: 87,
        successRate: 0.943,
        averageResponseTime: 2.1,
        earnings: BigInt(12500000000), // 12.5 SOL
        rating: 4.8,
      };

      const recentActivity = Array.from({ length: 7 }, (_, i) => ({
        timestamp: Date.now() - (6 - i) * 86400000,
        value: Math.floor(Math.random() * 10) + 1,
        label: `Day ${i + 1}`,
      }));

      const earnings = {
        daily: BigInt(400000000), // 0.4 SOL
        weekly: BigInt(2800000000), // 2.8 SOL
        monthly: BigInt(12000000000), // 12 SOL
      };

      return { performance, recentActivity, earnings };
    } catch (error) {
      throw new Error(`Failed to get agent analytics: ${String(error)}`);
    }
  }

  /**
   * Get network health metrics
   */
  async getNetworkHealth(): Promise<{
    blockHeight: number;
    averageBlockTime: number;
    transactionCount: number;
    networkLoad: number; // 0-1
  }> {
    try {
      console.log('🌐 Getting network health metrics');

      // Get current block height
      const blockHeight = await this.rpc
        .getBlockHeight({ commitment: this.commitment })
        .send();

      // Simulate other metrics
      await new Promise(resolve => setTimeout(resolve, 500));

      return {
        blockHeight: Number(blockHeight),
        averageBlockTime: 0.4, // 400ms
        transactionCount: 1567,
        networkLoad: 0.23, // 23%
      };
    } catch (error) {
      throw new Error(`Failed to get network health: ${String(error)}`);
    }
  }

  /**
   * Generate analytics report
   */
  async generateReport(
    timeframe: '24h' | '7d' | '30d',
    includeAgents: boolean = true
  ): Promise<{
    summary: IAnalyticsMetrics;
    volumeChart: ITimeSeriesData[];
    topAgents?: IAgentPerformance[] | undefined;
    networkHealth: { blockHeight: number; averageBlockTime: number };
    generatedAt: number;
  }> {
    try {
      console.log(`📄 Generating analytics report for ${timeframe}`);

      const [summary, volumeChart, topAgentsData, networkHealth] =
        await Promise.all([
          this.getPlatformAnalytics(timeframe),
          this.getVolumeTimeSeries(timeframe),
          includeAgents ? this.getTopAgents(5) : Promise.resolve([]),
          this.getNetworkHealth(),
        ]);

      const { blockHeight, averageBlockTime } = networkHealth;

      return {
        summary,
        volumeChart,
        topAgents: includeAgents ? topAgentsData : undefined,
        networkHealth: { blockHeight, averageBlockTime },
        generatedAt: Date.now(),
      };
    } catch (error) {
      throw new Error(`Failed to generate report: ${String(error)}`);
    }
  }
}