import { Component, inject, signal } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { NgIcon, provideIcons } from '@ng-icons/core';
import { lucideMic, lucideHeadphones, lucideAudioLines, lucideActivity } from '@ng-icons/lucide';

import { WebRTCService } from '../../../../core/services/webrtc.service';
import { VoiceLevelingService } from '../../../../core/services/voice-leveling.service';
import {
  NotificationAudioService,
  AppSound,
} from '../../../../core/services/notification-audio.service';
import { STORAGE_KEY_VOICE_SETTINGS } from '../../../../core/constants';

interface AudioDevice {
  deviceId: string;
  label: string;
}

@Component({
  selector: 'app-voice-settings',
  standalone: true,
  imports: [CommonModule, FormsModule, NgIcon],
  viewProviders: [
    provideIcons({
      lucideMic,
      lucideHeadphones,
      lucideAudioLines,
      lucideActivity,
    }),
  ],
  templateUrl: './voice-settings.component.html',
})
export class VoiceSettingsComponent {
  private webrtcService = inject(WebRTCService);
  readonly voiceLeveling = inject(VoiceLevelingService);
  readonly audioService = inject(NotificationAudioService);

  inputDevices = signal<AudioDevice[]>([]);
  outputDevices = signal<AudioDevice[]>([]);
  selectedInputDevice = signal<string>('');
  selectedOutputDevice = signal<string>('');
  inputVolume = signal(100);
  outputVolume = signal(100);
  audioBitrate = signal(96);
  latencyProfile = signal<'low' | 'balanced' | 'high'>('balanced');
  includeSystemAudio = signal(false);
  noiseReduction = signal(false);

  constructor() {
    this.loadVoiceSettings();
    this.loadAudioDevices();
  }

  async loadAudioDevices(): Promise<void> {
    try {
      if (!navigator.mediaDevices?.enumerateDevices) return;
      const devices = await navigator.mediaDevices.enumerateDevices();
      this.inputDevices.set(
        devices
          .filter((d) => d.kind === 'audioinput')
          .map((d) => ({ deviceId: d.deviceId, label: d.label })),
      );
      this.outputDevices.set(
        devices
          .filter((d) => d.kind === 'audiooutput')
          .map((d) => ({ deviceId: d.deviceId, label: d.label })),
      );
    } catch {}
  }

  loadVoiceSettings(): void {
    try {
      const raw = localStorage.getItem(STORAGE_KEY_VOICE_SETTINGS);
      if (!raw) return;
      const s = JSON.parse(raw);
      if (s.inputDevice) this.selectedInputDevice.set(s.inputDevice);
      if (s.outputDevice) this.selectedOutputDevice.set(s.outputDevice);
      if (typeof s.inputVolume === 'number') this.inputVolume.set(s.inputVolume);
      if (typeof s.outputVolume === 'number') this.outputVolume.set(s.outputVolume);
      if (typeof s.audioBitrate === 'number') this.audioBitrate.set(s.audioBitrate);
      if (s.latencyProfile) this.latencyProfile.set(s.latencyProfile);
      if (typeof s.includeSystemAudio === 'boolean')
        this.includeSystemAudio.set(s.includeSystemAudio);
      if (typeof s.noiseReduction === 'boolean') this.noiseReduction.set(s.noiseReduction);
    } catch {}
    if (this.noiseReduction() !== this.webrtcService.isNoiseReductionEnabled()) {
      this.webrtcService.toggleNoiseReduction(this.noiseReduction());
    }
  }

  saveVoiceSettings(): void {
    try {
      localStorage.setItem(
        STORAGE_KEY_VOICE_SETTINGS,
        JSON.stringify({
          inputDevice: this.selectedInputDevice(),
          outputDevice: this.selectedOutputDevice(),
          inputVolume: this.inputVolume(),
          outputVolume: this.outputVolume(),
          audioBitrate: this.audioBitrate(),
          latencyProfile: this.latencyProfile(),
          includeSystemAudio: this.includeSystemAudio(),
          noiseReduction: this.noiseReduction(),
        }),
      );
    } catch {}
  }

  onInputDeviceChange(event: Event): void {
    const select = event.target as HTMLSelectElement;
    this.selectedInputDevice.set(select.value);
    this.saveVoiceSettings();
  }

  onOutputDeviceChange(event: Event): void {
    const select = event.target as HTMLSelectElement;
    this.selectedOutputDevice.set(select.value);
    this.webrtcService.setOutputVolume(this.outputVolume() / 100);
    this.saveVoiceSettings();
  }

  onInputVolumeChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.inputVolume.set(parseInt(input.value, 10));
    this.saveVoiceSettings();
  }

  onOutputVolumeChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.outputVolume.set(parseInt(input.value, 10));
    this.webrtcService.setOutputVolume(this.outputVolume() / 100);
    this.saveVoiceSettings();
  }

  onLatencyProfileChange(event: Event): void {
    const select = event.target as HTMLSelectElement;
    const profile = select.value as 'low' | 'balanced' | 'high';
    this.latencyProfile.set(profile);
    this.webrtcService.setLatencyProfile(profile);
    this.saveVoiceSettings();
  }

  onAudioBitrateChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.audioBitrate.set(parseInt(input.value, 10));
    this.webrtcService.setAudioBitrate(this.audioBitrate());
    this.saveVoiceSettings();
  }

  onIncludeSystemAudioChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.includeSystemAudio.set(!!input.checked);
    this.saveVoiceSettings();
  }

  async onNoiseReductionChange(): Promise<void> {
    this.noiseReduction.update((v) => !v);
    await this.webrtcService.toggleNoiseReduction(this.noiseReduction());
    this.saveVoiceSettings();
  }

  /* ── Voice Leveling handlers ───────────────────────────────── */

  onVoiceLevelingToggle(): void {
    this.voiceLeveling.setEnabled(!this.voiceLeveling.enabled());
  }

  onTargetDbfsChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.voiceLeveling.setTargetDbfs(parseInt(input.value, 10));
  }

  onStrengthChange(event: Event): void {
    const select = event.target as HTMLSelectElement;
    this.voiceLeveling.setStrength(select.value as 'low' | 'medium' | 'high');
  }

  onMaxGainDbChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.voiceLeveling.setMaxGainDb(parseInt(input.value, 10));
  }

  onSpeedChange(event: Event): void {
    const select = event.target as HTMLSelectElement;
    this.voiceLeveling.setSpeed(select.value as 'slow' | 'medium' | 'fast');
  }

  onNoiseGateToggle(): void {
    this.voiceLeveling.setNoiseGate(!this.voiceLeveling.noiseGate());
  }

  onNotificationVolumeChange(event: Event): void {
    const input = event.target as HTMLInputElement;
    this.audioService.setNotificationVolume(parseFloat(input.value));
  }

  previewNotificationSound(): void {
    this.audioService.play(AppSound.Notification);
  }
}