package main

import (
	"fmt"
	"github.com/pkg/term"
)

type PieceType int

const (
	IPiece PieceType = iota
	JPiece
	LPiece
	SPiece
	ZPiece
	TPiece
	OPiece
)

type Point struct {
	X, Y int
}

type Piece struct {
	Type   PieceType
	RelX   int
	RelY   int
	Layout []Point
	Lock   int
}

type Bag []Piece

type Field [20][10]bool

func (f Field) String() (output string) {
	var toprow [10]bool
	var top bool
	for _, row := range f {
		top = !top
		for i, block := range row {
			if top {
				toprow[i] = block
				continue
			}
			switch {
			case toprow[i] && block:
				output += "\u2588"
			case toprow[i] && !block:
				output += "\u2580"
			case !toprow[i] && block:
				output += "\u2584"
			default:
				output += " "
			}
		}
		if !top {
			output += "\n"
		}
	}
	return output
}

func main() {
	var f Field
	fmt.Print("\033[2J") // Clear screen
	for i := 0; i < 200; i++ {
		if (i+i/10)%2 == 0 {
			f[i/10][i%10] = true
		}
	}
	for {
		fmt.Print("\033[0;0H") // Position to 0,0
		fmt.Println(f.String())
		t, _ := term.Open("/dev/tty")
		term.RawMode(t)
		key := make([]byte, 3)
		t.Read(key)
		t.Restore()
		t.Close()
		switch key[0] {
		case 27: // Escape, read the arrow key pressed
			fmt.Print(string(key[2]))
		case 'q':
			fmt.Println("...that was exciting!")
			return
		}
	}
}