package internal

import (
	"github.com/eliukblau/pixterm/ansimage"
	"github.com/qpliu/qrencode-go/qrencode"
)

func ConvertGridToANSImage(grid *qrencode.BitGrid) (s string, err error) {
	// HACK - ansimage has an image offset bug which hides the first two rows
	img, err := ansimage.New(2+2+((grid.Height()+1)/2)*2, 2+grid.Width())
	if err != nil {
		return
	}

	// white borders
	for x := 0; x < 1+grid.Width()+1; x++ {
		err = img.SetAt(2, x, 255, 255, 255)
		if err != nil {
			return
		}
		err = img.SetAt(2+grid.Height()+1, x, 255, 255, 255)
		if err != nil {
			return
		}
	}
	for y := 1; y < grid.Height()+3; y++ {
		err = img.SetAt(y, 0, 255, 255, 255)
		if err != nil {
			return
		}
		err = img.SetAt(y, grid.Width()+1, 255, 255, 255)
		if err != nil {
			return
		}
	}

	for y := 0; y < grid.Height(); y++ {
		for x := 0; x < grid.Width(); x++ {
			val := uint8(0)
			if !grid.Get(x, y) {
				val = 255
			}
			// HACK - ansimage has an image offset bug which hides the first two rows
			err = img.SetAt(y+3, x+1, val, val, val)
			if err != nil {
				return
			}
		}
	}
	s = img.Render()
	return
}