package main

import (
	"fmt"
	"os"
	"strconv"
)

// TODO:
// - Flags instead of os.Args
// - Interactive UI
// - Check compatability with other image types (PNG etc)
// - better ffmpeg bindings (go package?)
// - Update README

const MAX_SIZE = 1000000

func main() {
	if len(os.Args) < 6 {
		fmt.Println("Usage: ./glitch.go <source-file> <number-of-copies> <shit-size> <iterations> <chance-to-random % (0-100)>")
		return
	}

	sourceFile := os.Args[1]

	numCopies, err := strconv.Atoi(os.Args[2])
	if err != nil || numCopies <= 0 {
		fmt.Println("Invalid number of copies. Must be a positive integer.")
		return
	}

	shitSize, err := strconv.ParseInt(os.Args[3], 10, 64) // Parse shitSize as int64
	if err != nil || shitSize <= 0 {
		fmt.Println("Invalid shit size. Must be a positive integer.")
		return
	} else if shitSize > MAX_SIZE {
		fmt.Printf("shitSize exceeds maximum size (%d)\n", MAX_SIZE)
		return
	}

	iterations, err := strconv.ParseInt(os.Args[4], 10, 8)
	check(err, "Cannot parse iterations. Must be a positive integer")

	chanceToRandom, err := strconv.ParseInt(os.Args[5], 10, 32)
	if err != nil || chanceToRandom < 0 {
		fmt.Println("Invalid random chance value. Must be a positive integer (0-100).")
		return
	} else if chanceToRandom > 100 {
		fmt.Println("Invalid random chance value. Must range between 0 to 100.")
		return
	}

	fmt.Fprintf(os.Stdout, "Generating:\n %d copies of %s\n %d random bytes of data\n %d interations(s)\n Chance to random %d%%\n\n",
		numCopies, sourceFile, shitSize, iterations, chanceToRandom)

	makeOutputDir()
	defer clearOutputDir()

	generateGlitchedSequence(sourceFile, numCopies, shitSize, iterations, int32(chanceToRandom))
	ffmpegGenerateMP4()
}