package display

import (
	"context"
	"fmt"
	"image"
	"io"
	"log"
)

type Display interface {
	IsReady() error // Nil if it is ready, error with some info otherwise

	Flush(crystal, page byte)
	FlushByMask(mask uint32)
	GetFlushMaskBit(crystal, page byte) uint32

	// Image functions
	GetImg() *image.Gray
	LockImg()
	UnlockImg()
	GetBounds() image.Rectangle

	Test(ctx context.Context) error // DEBUG ONLY

	io.Closer
}

type DisplayModel int

const (
	SSD1306 DisplayModel = iota
	MT12864A
	MT12232A
)

func New(logger *log.Logger, model DisplayModel) (Display, error) {
	switch model {
	case SSD1306:
		return newSsd1306(logger)
	case MT12864A:
		return newMt12864a(logger)
	case MT12232A:
		return newMt12232a(logger)
	}
	return nil, fmt.Errorf("invalid display model")
}