import * as path from 'path'
import * as fs from 'fs'
import * as os from 'os'
import { exec } from 'child_process'
import { promisify } from 'util'

const execAsync = promisify(exec)

export async function convertGifToVideo(gifPath: string): Promise<string> {
	// Create a temporary file path for the output video
	const tempDir = os.tmpdir()
	const outputPath = path.join(
		tempDir,
		`converted-${Date.now()}-${Math.random().toString(36).substring(2)}.mp4`
	)

	// Use ffmpeg to convert the GIF to MP4 with optimized settings
	// -pix_fmt yuv420p: Ensures maximum compatibility
	// -vf scale=trunc(iw/2)*2:trunc(ih/2)*2: Ensures even dimensions
	// -movflags +faststart: Optimizes for streaming
	// -an: Removes audio (not needed for GIFs)
	// -crf 23: Good balance between quality and file size
	// -preset medium: Good balance between encoding speed and compression
	await execAsync(
		`ffmpeg -i "${gifPath}" -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -movflags +faststart -an -crf 23 -preset medium "${outputPath}"`
	)

	return outputPath
}