package conway

import (
	"fmt"
	"math/rand"
	"time"
)

func init() {
	rand.Seed(time.Now().UTC().UnixNano())
}

func RunConsoleGame(height, width, sleepMs int, mutate bool) (int, error) {
	sleepInterval := time.Duration(sleepMs * 1000 * 1000)

	game := NewGameOfLife(height, width)
	err := game.ImportRandomState()
	if err != nil {
		return 2, err
	}

	genTicks, err := game.Generations()
	if err != nil {
		return 3, err
	}

	for genTick := range genTicks {
		fmt.Printf("\nGeneration %v\n%v\n", genTick.N, time.Now())
		fmt.Println(game)

		if genTick.Error != nil {
			return 4, genTick.Error
		}

		if len(genTick.Message) > 0 {
			fmt.Println(genTick.Message)
		}

		if mutate && genTick.N%2 == 0 {
			game.Mutate()
		}

		time.Sleep(sleepInterval)
	}

	return 0, nil
}