GoSnake

main.go

package main

import (
	"fmt"
	"math/rand"
	"os"
	"slices"
	"time"

	"github.com/eiannone/keyboard"
)

const WALL = "\u001b[45m  "
const BG = "\u001b[102m  "
const SNAKE = "\u001b[44m  "
const HEAD = "\u001b[104m  "
const APPLE = "\u001b[41m  "
const RESET = "\u001b[0m  "

const SIZE = 25

func main() {
	keysEvents, _ := keyboard.GetKeys(16)

	snake := [][2]int{{2, SIZE / 2}, {3, SIZE / 2}, {4, SIZE / 2}}
	apple := [2]int{rand.Intn(SIZE-3) + 1, rand.Intn(SIZE-3) + 1}
	direction := [2]int{1, 0}

	for {
		for len(keysEvents) > 0 {
			switch (<-keysEvents).Key {
			case keyboard.KeyArrowUp:
				if direction[1] == 0 {
					direction = [2]int{0, -1}
				}
			case keyboard.KeyArrowDown:
				if direction[1] == 0 {
					direction = [2]int{0, 1}
				}
			case keyboard.KeyArrowLeft:
				if direction[0] == 0 {
					direction = [2]int{-1, 0}
				}
			case keyboard.KeyArrowRight:
				if direction[0] == 0 {
					direction = [2]int{1, 0}
				}
			case keyboard.KeyCtrlC:
				os.Exit(0)
			}
		}

		new := snake[len(snake)-1]
		new[0] += direction[0]
		new[1] += direction[1]

		if slices.Contains(snake, new) || new[0] == 0 || new[0] == SIZE-1 || new[1] == 0 || new[1] == SIZE-1 {
			os.Exit(0)
		}

		if new == apple {
			apple = [2]int{rand.Intn(SIZE-3) + 1, rand.Intn(SIZE-3) + 1}
		} else {
			snake = snake[1:]
		}
		snake = append(snake, new)

		for y := range SIZE {
			for x := range SIZE {
				if slices.Contains(snake, [2]int{x, y}) {
					if [2]int{x, y} == snake[len(snake)-1] {
						fmt.Print(HEAD)
					} else {
						fmt.Print(SNAKE)
					}
				} else if [2]int{x, y} == apple {
					fmt.Print(APPLE)
				} else if x == 0 || x == SIZE-1 || y == 0 || y == SIZE-1 {
					fmt.Print(WALL)
				} else {
					fmt.Print(BG)
				}
			}
			fmt.Println(RESET)
		}
		time.Sleep(time.Second / 5)
		fmt.Println("\033[H\033[2J")
		fmt.Println(len(snake) - 3)
	}
}