package main

import (
	"flag"
	"fmt"
	"os"
	"time"
)

import (
	. "github.com/meatballhat/box-o-sand/conway/go"
)

var (
	height  = flag.Int("height", 40, "Game height")
	width   = flag.Int("width", 80, "Game width")
	mutate  = flag.Bool("mutate", false, "Mutate every other generation")
	sleepMs = flag.Int("sleep.millis", 200,
		"Millisecond sleep interval per generation")
)

func main() {
	flag.Parse()

	game := NewGameOfLife(*height, *width)
	err := game.ImportRandomState()
	if err != nil {
		fmt.Fprintf(os.Stderr, "WHAT IN FAIL?: %v\n", err)
		os.Exit(2)
	}

	cksum := game.Checksum()

	ticks := time.Tick(time.Duration(*sleepMs) * time.Millisecond)
	generations := 0
	for now := range ticks {
		fmt.Printf("\nGeneration %v\n%v\n", generations, now)
		fmt.Println(game)

		game.EvaluateGeneration()

		if cksum == game.Checksum() {
			fmt.Println("Stasis!")
			os.Exit(0)
		}

		cksum = game.Checksum()

		if *mutate && generations%2 == 0 {
			game.Mutate()
		}

		generations++
	}
}