import fs from 'fs';

import FFMPEGCompression from '../../src/FFMPEGCompression';

/**
 * Change this if the environment setup changed.
 */
function getTempBinaryFile(): string {
    
    return __dirname + '/../../tmp/ffmpeg-4.1.1-amd64-static/ffmpeg';
}

function getMockDiretory(path: string): string {
    
    return __dirname + '/../Mocks/' + path;
}

it('should compress image', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
        
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed.jpg');
    compression.setOutputFilePath(mockDirectory + 'compressed.jpg');
    compression.build();
        
    await compression.compress();

    expect(fs.existsSync(mockDirectory + 'compressed.jpg')).toBe(true);
});

it('should compress jpeg image format with compression level', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
    
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed-compression-controlled.jpg');
    compression.setOutputFilePath(mockDirectory + 'compressed-compression-controlled.jpg');
    compression.setCompressionLevel(FFMPEGCompression.COMPRESSION_LEVEL_LOW);
    compression.build();
        
    await compression.compress();

    expect(fs.existsSync(mockDirectory + 'compressed-compression-controlled.jpg')).toBe(true);
});

it('should compress png image format with compression level', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
        
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed-compression-controlled.png');
    compression.setOutputFilePath(mockDirectory + 'compressed-compression-controlled.png');
    compression.setCompressionLevel(FFMPEGCompression.COMPRESSION_LEVEL_LOW);
    compression.build();
        
    await compression.compress();
    
    expect(fs.existsSync(mockDirectory + 'compressed-compression-controlled.png')).toBe(true);
});

it('should compress image with low compression level', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
        
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed.jpg');
    compression.setOutputFilePath(mockDirectory + 'compressed-cl-low.jpg');
    compression.setCompressionLevel(FFMPEGCompression.COMPRESSION_LEVEL_LOW);
    compression.build();
        
    await compression.compress(); 

    expect(fs.existsSync(mockDirectory + 'compressed-cl-low.jpg')).toBe(true);
});

it('should compress image with normal compression level', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
        
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed.jpg');
    compression.setOutputFilePath(mockDirectory + 'compressed-cl-normal.jpg');
    compression.setCompressionLevel(FFMPEGCompression.COMPRESSION_LEVEL_NORMAL);
    compression.build();
        
    await compression.compress();
    
    expect(fs.existsSync(mockDirectory + 'compressed-cl-normal.jpg')).toBe(true);
});

it('should compress image with high compression level', async (): Promise<void> => {
    
    const mockDirectory = getMockDiretory('images/');

    const compression = new FFMPEGCompression();
        
    compression.load();
    compression.setBin(getTempBinaryFile());
    compression.setSourceFilePath(mockDirectory + 'uncompressed.jpg');
    compression.setOutputFilePath(mockDirectory + 'compressed-cl-high.jpg');
    compression.setCompressionLevel(FFMPEGCompression.COMPRESSION_LEVEL_HIGH);
    compression.build();
        
    await compression.compress(); 

    expect(fs.existsSync(mockDirectory + 'compressed-cl-high.jpg')).toBe(true);
});