import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Filesystem, FilesystemDirectory } from '@capacitor/filesystem';
import { Platform } from '@ionic/angular';

declare var FFmpeg: any;

@Injectable({
  providedIn: 'root'
})
export class VideoCompressionService {

  constructor(
    private http: HttpClient,
    private platform: Platform
  ) { }

  async compressVideo(inputFile: string, outputFileName: string, quality: string = 'medium'): Promise<void> {
    // Load FFmpeg
    await this.loadFFmpeg();

    // Input file
    const inputBuffer = await this.fetchVideo(inputFile);

    // Output file path
    const outputPath = await this.getOutputFilePath(outputFileName);

    // Run FFmpeg command
    await this.runFFmpegCommand(inputBuffer, outputPath, quality);

    console.log('Video compression complete!');
  }

  private async loadFFmpeg(): Promise<void> {
    if (!FFmpeg.isLoaded()) {
      await FFmpeg.load();
    }
  }

  private async fetchVideo(url: string): Promise<ArrayBuffer> {
    const response = await this.http.get(url, { responseType: 'arraybuffer' }).toPromise();
    return response;
  }

  private async getOutputFilePath(outputFileName: string): Promise<string> {
    const dataDirectory = await Filesystem.getUri({
      directory: FilesystemDirectory.Data,
      path: ''
    });

    return `${dataDirectory.uri}/${outputFileName}`;
  }

  private async runFFmpegCommand(inputBuffer: ArrayBuffer, outputPath: string, quality: string): Promise<void> {
    await FFmpeg.run('-i', inputBuffer, '-c:v', 'libx264', '-preset', quality, outputPath);
  }
}




//Mobile
/* import { Injectable } from '@angular/core';
import { HTTP } from '@ionic-native/http/ngx';
import { Filesystem, FilesystemDirectory, FilesystemEncoding } from '@capacitor/filesystem';
import { Platform } from '@ionic/angular';

declare var FFmpeg: any;

@Injectable({
  providedIn: 'root'
})
export class VideoCompressionService {

  constructor(
    private http: HTTP,
    private platform: Platform
  ) { }

  async compressVideo(inputFile: string, outputFileName: string, quality: string = 'medium'): Promise<void> {
    // Load FFmpeg
    await this.loadFFmpeg();

    // Input file
    const inputBuffer = await this.fetchVideo(inputFile);

    // Output file path
    const outputPath = await this.getOutputFilePath(outputFileName);

    // Run FFmpeg command
    await this.runFFmpegCommand(inputBuffer, outputPath, quality);

    console.log('Video compression complete!');
  }

  private async loadFFmpeg(): Promise<void> {
    if (!FFmpeg.isLoaded()) {
      await FFmpeg.load();
    }
  }

  private async fetchVideo(url: string): Promise<ArrayBuffer> {
    const response = await this.http.sendRequest(url, {
      method: 'get',
      responseType: 'arraybuffer'
    });

    return response.data;
  }

  private async getOutputFilePath(outputFileName: string): Promise<string> {
    const dataDirectory = await Filesystem.getUri({
      directory: FilesystemDirectory.Data,
      path: ''
    });

    return `${dataDirectory.uri}/${outputFileName}`;
  }

  private async runFFmpegCommand(inputBuffer: ArrayBuffer, outputPath: string, quality: string): Promise<void> {
    await FFmpeg.run('-i', inputBuffer, '-c:v', 'libx264', '-preset', quality, outputPath);
  }
}
 */