/* eslint-disable @typescript-eslint/member-ordering */
import {
  Component,
  inject,
  signal,
  OnInit
} from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { Router } from '@angular/router';
import { NgIcon, provideIcons } from '@ng-icons/core';
import {
  lucideServer,
  lucidePlus,
  lucideTrash2,
  lucideCheck,
  lucideX,
  lucideSettings,
  lucideRefreshCw,
  lucideGlobe,
  lucideArrowLeft,
  lucideAudioLines
} from '@ng-icons/lucide';

import { ServerDirectoryService } from '../../core/services/server-directory.service';
import { WebRTCService } from '../../core/services/webrtc.service';
import { NotificationAudioService, AppSound } from '../../core/services/notification-audio.service';
import { STORAGE_KEY_CONNECTION_SETTINGS, STORAGE_KEY_VOICE_SETTINGS } from '../../core/constants';

@Component({
  selector: 'app-settings',
  standalone: true,
  imports: [
    CommonModule,
    FormsModule,
    NgIcon
  ],
  viewProviders: [
    provideIcons({
      lucideServer,
      lucidePlus,
      lucideTrash2,
      lucideCheck,
      lucideX,
      lucideSettings,
      lucideRefreshCw,
      lucideGlobe,
      lucideArrowLeft,
      lucideAudioLines
    })
  ],
  templateUrl: './settings.component.html'
})
/**
 * Settings page for managing signaling servers and connection preferences.
 */
export class SettingsComponent implements OnInit {
  private serverDirectory = inject(ServerDirectoryService);
  private webrtcService = inject(WebRTCService);
  private router = inject(Router);
  audioService = inject(NotificationAudioService);

  servers = this.serverDirectory.servers;
  isTesting = signal(false);
  addError = signal<string | null>(null);

  newServerName = '';
  newServerUrl = '';
  autoReconnect = true;
  searchAllServers = true;
  noiseReduction = true;

  /** Load persisted connection settings on component init. */
  ngOnInit(): void {
    this.loadConnectionSettings();
    this.loadVoiceSettings();
  }

  /** Add a new signaling server after URL validation and duplicate checking. */
  addServer(): void {
    this.addError.set(null);

    // Validate URL
    try {
      new URL(this.newServerUrl);
    } catch {
      this.addError.set('Please enter a valid URL');
      return;
    }

    // Check for duplicates
    if (this.servers().some((server) => server.url === this.newServerUrl)) {
      this.addError.set('This server URL already exists');
      return;
    }

    this.serverDirectory.addServer({
      name: this.newServerName.trim(),
      url: this.newServerUrl.trim().replace(/\/$/, '') // Remove trailing slash
    });

    // Clear form
    this.newServerName = '';
    this.newServerUrl = '';

    // Test the new server
    const servers = this.servers();
    const newServer = servers[servers.length - 1];

    if (newServer) {
      this.serverDirectory.testServer(newServer.id);
    }
  }

  /** Remove a signaling server by its ID. */
  removeServer(id: string): void {
    this.serverDirectory.removeServer(id);
  }

  /** Set the active signaling server used for connections. */
  setActiveServer(id: string): void {
    this.serverDirectory.setActiveServer(id);
  }

  /** Test connectivity to all configured servers. */
  async testAllServers(): Promise<void> {
    this.isTesting.set(true);
    await this.serverDirectory.testAllServers();
    this.isTesting.set(false);
  }

  /** Load connection settings (auto-reconnect, search scope) from localStorage. */
  loadConnectionSettings(): void {
    const settings = localStorage.getItem(STORAGE_KEY_CONNECTION_SETTINGS);

    if (settings) {
      const parsed = JSON.parse(settings);

      this.autoReconnect = parsed.autoReconnect ?? true;
      this.searchAllServers = parsed.searchAllServers ?? true;
      this.serverDirectory.setSearchAllServers(this.searchAllServers);
    }
  }

  /** Persist current connection settings to localStorage. */
  saveConnectionSettings(): void {
    localStorage.setItem(
      STORAGE_KEY_CONNECTION_SETTINGS,
      JSON.stringify({
        autoReconnect: this.autoReconnect,
        searchAllServers: this.searchAllServers
      })
    );

    this.serverDirectory.setSearchAllServers(this.searchAllServers);
  }

  /** Navigate back to the main page. */
  goBack(): void {
    this.router.navigate(['/']);
  }

  /** Load voice settings (noise reduction) from localStorage. */
  loadVoiceSettings(): void {
    const settings = localStorage.getItem(STORAGE_KEY_VOICE_SETTINGS);

    if (settings) {
      const parsed = JSON.parse(settings);

      this.noiseReduction = parsed.noiseReduction ?? false;
    }

    // Sync the live WebRTC state with the persisted preference
    if (this.noiseReduction !== this.webrtcService.isNoiseReductionEnabled()) {
      this.webrtcService.toggleNoiseReduction(this.noiseReduction);
    }
  }

  /** Called when the notification volume slider changes. */
  onNotificationVolumeChange(value: number): void {
    this.audioService.setNotificationVolume(value);
  }

  /** Play a preview of the notification sound at the current volume. */
  previewNotificationSound(): void {
    this.audioService.play(AppSound.Notification);
  }

  /** Persist noise reduction preference (merged into existing voice settings) and apply immediately. */
  async saveVoiceSettings(): Promise<void> {
    // Merge into existing voice settings so we don't overwrite device/volume prefs
    let existing: Record<string, unknown> = {};

    try {
      const raw = localStorage.getItem(STORAGE_KEY_VOICE_SETTINGS);

      if (raw)
        existing = JSON.parse(raw);
    } catch {}

    localStorage.setItem(
      STORAGE_KEY_VOICE_SETTINGS,
      JSON.stringify({ ...existing,
        noiseReduction: this.noiseReduction })
    );

    await this.webrtcService.toggleNoiseReduction(this.noiseReduction);
  }
}