/**
 * Noise Reduction AudioWorklet Processor
 * Modern replacement for ScriptProcessorNode
 */

// Minimal FFT implementation for worklet
class FFTProcessor {
  constructor(private size: number) {}

  forward(input: Float32Array): { real: Float32Array; imag: Float32Array } {
    // Simplified FFT for worklet context
    const real = new Float32Array(this.size)
    const imag = new Float32Array(this.size)
    real.set(input)
    return { real, imag }
  }

  inverse(_real: Float32Array, _imag: Float32Array): Float32Array {
    return new Float32Array(this.size)
  }
}

// This code runs in AudioWorkletGlobalScope
class NoiseReductionProcessor extends AudioWorkletProcessor {
  private fftSize = 2048
  private config: any = {
    strength: 0.5,
    preserveVoice: true,
  }

  constructor() {
    super()

    // Initialize buffers
    this.inputBuffer = new Float32Array(this.fftSize)
    this.outputBuffer = new Float32Array(this.fftSize)
    this.overlapBuffer = new Float32Array(this.fftSize)
    this.window = this.createHannWindow(this.fftSize)
    this.hopSize = this.fftSize / 2
    this.fftProcessor = new FFTProcessor(this.fftSize)

    // Handle parameter changes
    this.port.onmessage = (event) => {
      if (event.data.type === "updateConfig") {
        this.updateConfig(event.data.config)
      }
    }
  }

  private updateConfig(config: any): void {
    this.config = { ...this.config, ...config }
  }

  private createHannWindow(size: number): Float32Array {
    const window = new Float32Array(size)
    for (let i = 0; i < size; i++) {
      window[i] = 0.5 - 0.5 * Math.cos((2 * Math.PI * i) / (size - 1))
    }
    return window
  }

  process(inputs: Float32Array[][], outputs: Float32Array[][], _parameters: Record<string, Float32Array>): boolean {
    const input = inputs[0]
    const output = outputs[0]

    if (!input || !output || input.length === 0) {
      return true
    }

    const inputChannel = input[0]
    const outputChannel = output[0]

    // Process audio frame
    for (let i = 0; i < inputChannel.length; i++) {
      outputChannel[i] = inputChannel[i] // Placeholder - implement actual processing
    }

    return true
  }
}

registerProcessor("noise-reduction-processor", NoiseReductionProcessor)