package main

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

const nsemi = 4
const ntipi = 13

type carta = int

var nomeseme [nsemi]string = [nsemi]string{ "❤", "◆","♣","♠" }
var nometipo [ntipi]string = [ntipi]string{ 0:"A", 10:"J", 11:"Q", 12:"K" }

type mazzo [nsemi * ntipi]carta

func carta2string(s, t int) string {
	return nometipo[t] + nomeseme[s]
}

func coloreSeme(seme int) {
	if seme < 2 {
		Print("\033[31m")
	} else {
		Print("\033[30m")
	}
}

func resetColori() {
	Print("\033[0m")
}

func main() {
	for i := 1; i <= 9; i++ {
		nometipo[i] = strconv.FormatInt(int64(i + 1), 10)
	}	

	rand.Seed(time.Now().UnixNano())
	var m mazzo
	for i := 0; i < nsemi * ntipi; i++ {
		m[i] = i
	}

	for i := 0; i < nsemi * ntipi; i++ {
		p := rand.Intn(nsemi * ntipi - i)
		m[i], m[i + p] = m[i + p], m[i]
	}

	for i := 0; i < nsemi * ntipi; i++ {
		seme := m[i] / ntipi
		coloreSeme(seme)
		Print(carta2string(seme, m[i] % ntipi), " ")
		if (i + 1) % ntipi == 0 {
			Println()
		}
	}

	resetColori()
}