/**
 * WIA-SEMI-002: Semiconductor Testing Standard
 * TypeScript SDK Implementation
 *
 * @module @wia/semiconductor-testing
 * @version 1.0.0
 */

import { v4 as uuidv4 } from 'uuid';
import WebSocket from 'ws';

// Export all types
export * from './types';

import {
  WaferTest,
  WaferTestResults,
  PackageTest,
  PackageTestResults,
  ATEConfig,
  ATEStatus,
  ATESession,
  QualityMetrics,
  AnalyticsConfig,
  TestResultEvent,
  StreamCallback,
  ExportConfig,
  DieResult,
  WaferStatistics,
  WaferMap,
} from './types';

/**
 * Main WIA-SEMI-002 SDK class
 */
export class SemiconductorTesting {
  private facilityId: string;
  private equipment?: string;
  private mode: 'production' | 'debug' | 'simulation';
  private ateConnection?: ATESession;
  private streamingSocket?: WebSocket;

  constructor(config: {
    facilityId: string;
    equipment?: string;
    mode?: 'production' | 'debug' | 'simulation';
  }) {
    this.facilityId = config.facilityId;
    this.equipment = config.equipment;
    this.mode = config.mode || 'production';
  }

  /**
   * Initialize the testing system
   */
  async initialize(): Promise<void> {
    console.log(`Initializing WIA-SEMI-002 SDK for facility: ${this.facilityId}`);
    console.log(`Mode: ${this.mode}`);

    if (this.equipment) {
      console.log(`Equipment: ${this.equipment}`);
    }

    // Perform initialization checks
    await this.validateConfiguration();
  }

  /**
   * Validate configuration
   */
  private async validateConfiguration(): Promise<void> {
    // Validate facility ID format
    if (!this.facilityId.match(/^[A-Z0-9-]+$/)) {
      throw new Error('Invalid facility ID format');
    }

    // Additional validation can be added here
  }

  // ========================================================================
  // Wafer Testing
  // ========================================================================

  /**
   * Create a new wafer test session
   */
  async createWaferTest(config: WaferTest): Promise<WaferTestSession> {
    return new WaferTestSession(config, this.mode);
  }

  /**
   * Load existing wafer test results
   */
  async loadWaferResults(waferId: string): Promise<WaferTestResults> {
    // In production, this would load from database
    // For now, return mock data
    throw new Error('Not implemented - loadWaferResults');
  }

  // ========================================================================
  // Package Testing
  // ========================================================================

  /**
   * Create a new package test session
   */
  async createPackageTest(config: PackageTest): Promise<PackageTestSession> {
    return new PackageTestSession(config, this.mode);
  }

  /**
   * Load existing package test results
   */
  async loadPackageResults(serialNumber: string): Promise<PackageTestResults> {
    throw new Error('Not implemented - loadPackageResults');
  }

  // ========================================================================
  // ATE Control
  // ========================================================================

  /**
   * Connect to ATE equipment
   */
  async connectATE(config: ATEConfig): Promise<ATESession> {
    console.log(`Connecting to ATE: ${config.model} at ${config.ipAddress}:${config.port}`);

    if (this.mode === 'simulation') {
      // Return mock session for simulation mode
      this.ateConnection = new MockATESession(config);
      return this.ateConnection;
    }

    // In production, establish real connection
    // For now, return mock
    this.ateConnection = new MockATESession(config);
    return this.ateConnection;
  }

  /**
   * Disconnect from ATE
   */
  async disconnectATE(): Promise<void> {
    if (this.ateConnection) {
      await this.ateConnection.disconnect();
      this.ateConnection = undefined;
    }
  }

  // ========================================================================
  // Analytics and Quality Metrics
  // ========================================================================

  /**
   * Analyze yield for specified lots/wafers
   */
  async analyzeYield(config: AnalyticsConfig): Promise<QualityMetrics> {
    console.log('Analyzing yield...');

    // Simulate analytics computation
    const metrics: QualityMetrics = {
      period: {
        start: config.dateRange?.start || new Date(Date.now() - 30 * 24 * 60 * 60 * 1000),
        end: config.dateRange?.end || new Date(),
      },
      waferYield: 85 + Math.random() * 10,
      finalYield: 95 + Math.random() * 4,
      cumulativeYield: 80 + Math.random() * 15,
      dpm: Math.floor(Math.random() * 150 + 50),
      uptime: 95 + Math.random() * 4,
      throughput: Math.floor(Math.random() * 50 + 150),
      binDistribution: {
        0: Math.floor(Math.random() * 50),
        1: Math.floor(Math.random() * 800 + 200),
        2: Math.floor(Math.random() * 100),
        3: Math.floor(Math.random() * 50),
      },
      trend: Math.random() > 0.5 ? 'improving' : 'stable',
    };

    return metrics;
  }

  /**
   * Generate quality report
   */
  async generateQualityReport(config: AnalyticsConfig): Promise<string> {
    const metrics = await this.analyzeYield(config);

    const report = `
==============================================
WIA-SEMI-002 Quality Metrics Report
==============================================

Period: ${metrics.period.start.toISOString()} to ${metrics.period.end.toISOString()}

YIELD METRICS
-------------
Wafer Probe Yield:    ${metrics.waferYield.toFixed(2)}%
Final Test Yield:     ${metrics.finalYield.toFixed(2)}%
Cumulative Yield:     ${metrics.cumulativeYield.toFixed(2)}%

QUALITY METRICS
---------------
Defects Per Million:  ${metrics.dpm}
Equipment Uptime:     ${metrics.uptime.toFixed(1)}%
Throughput:           ${metrics.throughput} wafers/day

BIN DISTRIBUTION
----------------
Bin 0 (Fail):         ${metrics.binDistribution[0]}
Bin 1 (Pass):         ${metrics.binDistribution[1]}
Bin 2 (Partial):      ${metrics.binDistribution[2]}
Bin 3 (Other):        ${metrics.binDistribution[3]}

TREND ANALYSIS
--------------
Overall Trend:        ${metrics.trend}

==============================================
弘益人間 (홍익인간) · Benefit All Humanity
© 2025 WIA
==============================================
    `;

    return report;
  }

  // ========================================================================
  // Data Export
  // ========================================================================

  /**
   * Export test results in specified format
   */
  async exportResults(
    results: WaferTestResults | PackageTestResults,
    config: ExportConfig
  ): Promise<Blob> {
    switch (config.format) {
      case 'JSON':
        return this.exportJSON(results, config);
      case 'CSV':
        return this.exportCSV(results, config);
      case 'STDF':
        return this.exportSTDF(results, config);
      default:
        throw new Error(`Unsupported export format: ${config.format}`);
    }
  }

  private async exportJSON(
    results: WaferTestResults | PackageTestResults,
    config: ExportConfig
  ): Promise<Blob> {
    const json = JSON.stringify(results, null, 2);
    return new Blob([json], { type: 'application/json' });
  }

  private async exportCSV(
    results: WaferTestResults | PackageTestResults,
    config: ExportConfig
  ): Promise<Blob> {
    // Simplified CSV export
    let csv = 'WIA-SEMI-002 Test Results\n';

    if ('dies' in results) {
      // Wafer results
      csv += 'Wafer ID,Die X,Die Y,Bin,Test Time (ms)\n';
      results.dies.forEach((die) => {
        csv += `${results.waferId},${die.x},${die.y},${die.binCode},${die.testTime}\n`;
      });
    } else {
      // Package results
      csv += 'Serial Number,Pass,Bin,Duration (ms)\n';
      csv += `${results.serialNumber},${results.pass},${results.binCode},${results.duration}\n`;
    }

    return new Blob([csv], { type: 'text/csv' });
  }

  private async exportSTDF(
    results: WaferTestResults | PackageTestResults,
    config: ExportConfig
  ): Promise<Blob> {
    // STDF export would require full STDF v4 implementation
    // This is a placeholder
    throw new Error('STDF export not yet implemented');
  }

  // ========================================================================
  // Real-time Streaming
  // ========================================================================

  /**
   * Start streaming test results
   */
  async startStreaming(url: string, callback: StreamCallback): Promise<void> {
    this.streamingSocket = new WebSocket(url);

    this.streamingSocket.on('message', (data: string) => {
      try {
        const event: TestResultEvent = JSON.parse(data);
        callback(event);
      } catch (error) {
        console.error('Error parsing streaming data:', error);
      }
    });

    this.streamingSocket.on('error', (error) => {
      console.error('WebSocket error:', error);
    });
  }

  /**
   * Stop streaming
   */
  async stopStreaming(): Promise<void> {
    if (this.streamingSocket) {
      this.streamingSocket.close();
      this.streamingSocket = undefined;
    }
  }
}

// ============================================================================
// Wafer Test Session
// ============================================================================

class WaferTestSession {
  private config: WaferTest;
  private mode: string;

  constructor(config: WaferTest, mode: string) {
    this.config = config;
    this.mode = mode;
  }

  /**
   * Execute wafer test
   */
  async execute(): Promise<WaferTestResults> {
    console.log(`Executing wafer test for ${this.config.waferId}`);

    // Simulate test execution
    const dies: DieResult[] = [];
    const dieCount = 400; // Typical die count

    // Generate die results
    for (let y = 0; y < 20; y++) {
      for (let x = 0; x < 20; x++) {
        const centerDist = Math.sqrt(Math.pow(x - 10, 2) + Math.pow(y - 10, 2));
        const yieldProb = Math.max(0.3, 1 - centerDist / 15);

        let binCode = 0;
        const rand = Math.random();

        if (rand < yieldProb * 0.85) {
          binCode = 1; // Pass
        } else if (rand < yieldProb) {
          binCode = 2; // Partial
        } else {
          binCode = 0; // Fail
        }

        dies.push({
          x,
          y,
          binCode,
          testTime: Math.random() * 1000 + 500,
        });
      }
    }

    // Calculate statistics
    const goodDies = dies.filter((d) => d.binCode === 1).length;
    const partialDies = dies.filter((d) => d.binCode > 1 && d.binCode < 9).length;
    const failedDies = dies.filter((d) => d.binCode === 0).length;

    const statistics: WaferStatistics = {
      totalDies: dieCount,
      goodDies,
      partialDies,
      failedDies,
      yield: (goodDies / dieCount) * 100,
      averageTestTime: dies.reduce((sum, d) => sum + d.testTime, 0) / dieCount,
      binDistribution: dies.reduce((acc, d) => {
        acc[d.binCode] = (acc[d.binCode] || 0) + 1;
        return acc;
      }, {} as Record<number, number>),
    };

    // Generate wafer map
    const map: number[][] = [];
    for (let y = 0; y < 20; y++) {
      const row: number[] = [];
      for (let x = 0; x < 20; x++) {
        const die = dies.find((d) => d.x === x && d.y === y);
        row.push(die?.binCode || 0);
      }
      map.push(row);
    }

    const waferMap: WaferMap = {
      waferId: this.config.waferId,
      waferSize: this.config.waferSize,
      dieSize: this.config.dieSize,
      map,
      metadata: {
        createdAt: new Date(),
        testProgram: this.config.testProgram,
        equipment: 'SIMULATOR',
      },
    };

    return {
      waferId: this.config.waferId,
      timestamp: new Date(),
      duration: Math.random() * 30000 + 15000, // 15-45 minutes
      dies,
      statistics,
      waferMap,
    };
  }
}

// ============================================================================
// Package Test Session
// ============================================================================

class PackageTestSession {
  private config: PackageTest;
  private mode: string;

  constructor(config: PackageTest, mode: string) {
    this.config = config;
    this.mode = mode;
  }

  /**
   * Execute package test
   */
  async execute(): Promise<PackageTestResults> {
    console.log(`Executing package test for ${this.config.serialNumber}`);

    // Simulate test
    const pass = Math.random() > 0.05; // 95% pass rate

    return {
      serialNumber: this.config.serialNumber,
      timestamp: new Date(),
      duration: Math.random() * 60000 + 30000, // 30-90 seconds
      pass,
      binCode: pass ? 1 : 0,
      continuity: {
        allPinsConnected: pass,
        failedPins: pass ? [] : [1, 5, 10],
        pinResistance: {},
        isolation: pass,
      },
      parametric: [],
      functional: [],
    };
  }
}

// ============================================================================
// Mock ATE Session
// ============================================================================

class MockATESession implements ATESession {
  sessionId: string;
  equipment: ATEConfig;
  startTime: Date;
  status: ATEStatus;

  constructor(config: ATEConfig) {
    this.sessionId = uuidv4();
    this.equipment = config;
    this.startTime = new Date();
    this.status = {
      equipmentId: config.equipmentId,
      connected: true,
      status: 'idle',
      activeSites: [],
      temperature: 23 + Math.random() * 5,
      lastCalibration: new Date(Date.now() - 7 * 24 * 60 * 60 * 1000),
      uptime: 95 + Math.random() * 4,
    };
  }

  async disconnect(): Promise<void> {
    this.status.connected = false;
    this.status.status = 'offline';
  }

  async loadProgram(programId: string): Promise<void> {
    console.log(`Loading test program: ${programId}`);
    // Simulate program load
    await new Promise((resolve) => setTimeout(resolve, 1000));
  }

  async executeTest(
    config: WaferTest | PackageTest
  ): Promise<WaferTestResults | PackageTestResults> {
    this.status.status = 'testing';

    if ('waferId' in config) {
      const session = new WaferTestSession(config, 'simulation');
      const results = await session.execute();
      this.status.status = 'idle';
      return results;
    } else {
      const session = new PackageTestSession(config, 'simulation');
      const results = await session.execute();
      this.status.status = 'idle';
      return results;
    }
  }

  async getStatus(): Promise<ATEStatus> {
    return this.status;
  }
}

// ============================================================================
// Utility Functions
// ============================================================================

/**
 * Calculate yield from test results
 */
export function calculateYield(
  results: WaferTestResults | PackageTestResults
): number {
  if ('dies' in results) {
    return results.statistics.yield;
  } else {
    return results.pass ? 100 : 0;
  }
}

/**
 * Generate wafer map visualization
 */
export function generateWaferMapHTML(waferMap: WaferMap): string {
  let html = '<div class="wafer-map">';

  waferMap.map.forEach((row) => {
    html += '<div class="wafer-row">';
    row.forEach((binCode) => {
      const className = `die bin${binCode}`;
      html += `<div class="${className}" title="Bin ${binCode}"></div>`;
    });
    html += '</div>';
  });

  html += '</div>';
  return html;
}

/**
 * Validate STDF file
 */
export async function validateSTDF(file: Blob): Promise<boolean> {
  // STDF validation logic would go here
  // For now, just check file size
  return file.size > 0;
}

// ============================================================================
// Export main class as default
// ============================================================================

export default SemiconductorTesting;