fun drawPixel(x:Int, y:Int, red:Int, green:Int, blue: Int, image: BufferedImage) {
    image.setRGB(x, y, Color(red,green,blue).rgb)
}

fun drawRandImage(
    image: BufferedImage, stepSize: Int = 1,
    redRng: Int = 255, greenRng: Int = 255, blueRng: Int = 255
) {
    for(posX in 0 until image.width step stepSize){
        for (posY in 0 until image.height step stepSize) {
            val r = if (redRng <= 0) 0 else Random.nextInt(0, redRng)
            val g = if (greenRng <= 0) 0 else Random.nextInt(0, greenRng)
            val b = if (blueRng <= 0) 0 else Random.nextInt(0, blueRng)
            drawPixel(posX, posY, r, g, b, image)
        }
    }
}

fun writeImage(img: BufferedImage, file: String) {
    val imgthread = Thread(Runnable {
        ImageIO.write(img, File(file).extension, File(file))
    })
    try {
        imgthread.start()
    } catch (ex: Exception) {
        ex.printStackTrace()
        imgthread.interrupt()
    }
}

fun drawTile(
    startX: Int, startY: Int, size: Int,
    red: Int, green: Int, blue: Int, image: BufferedImage
) {
    for (posX in startX until startX+size) {
        for (posY in startY until startY+size) {
            drawPixel(posX,posY,red,green,blue,image)
        }
    }
}

fun drawImage(pixels: ArrayList<List<Int>>, image: BufferedImage) {
    pixels.forEachIndexed { posY, row ->
        row.forEachIndexed { posX, col ->
            when(col) {
                1 -> drawTile(posX*10,posY*10,10,255,2,0,image)
                2 -> drawTile(posX*10,posY*10,10,156,25,31,image)
                3 -> drawTile(posX*10,posY*10,10,255,255,255,image)
                else -> drawTile(posX*10,posY*10,10,23,0,44,image)
            }
        }
    }
}

val map = arrayListOf(
    listOf(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
    listOf(0,0,0,1,1,1,0,0,0,1,2,2,0,0,0),
    listOf(0,0,1,3,3,1,1,0,1,1,1,2,2,0,0),
    listOf(0,1,3,3,1,1,1,1,1,1,1,1,2,2,0),
    listOf(0,1,3,1,1,1,1,1,1,1,1,1,2,2,0),
    listOf(0,1,1,1,1,1,1,1,1,1,1,1,2,2,0),
    listOf(0,1,1,1,1,1,1,1,1,1,1,1,2,2,0),
    listOf(0,0,1,1,1,1,1,1,1,1,1,2,2,0,0),
    listOf(0,0,0,1,1,1,1,1,1,1,2,2,0,0,0),
    listOf(0,0,0,0,1,1,1,1,1,2,2,0,0,0,0),
    listOf(0,0,0,0,0,1,1,1,2,2,0,0,0,0,0),
    listOf(0,0,0,0,0,0,1,2,2,0,0,0,0,0,0),
    listOf(0,0,0,0,0,0,0,2,0,0,0,0,0,0,0),
    listOf(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),
)

val toRGBA = { hex: String ->
    val red = hex.toLong(16) and 0xff0000 shr 16
    val green = hex.toLong(16) and 0xff00 shr 8
    val blue = hex.toLong(16) and 0xff
    val alpha = hex.toLong(16) and 0xff000000 shr 24
    Color(red.toInt(),green.toInt(),blue.toInt(),alpha.toInt())
}

fun getPixelColors(file: String, listName: String): ArrayList<List<String>> {
    val table = FileInputStream(file)
    val sheet = WorkbookFactory.create(table).getSheet(listName)
    val rowIterator: Iterator<Row> = sheet.iterator()
    val rowArray: ArrayList<Int> = ArrayList()
    val cellArray: ArrayList<Int> = ArrayList()
    while (rowIterator.hasNext()) {
        val row: Row = rowIterator.next()
        rowArray.add(row.rowNum)
        val cellIterator = row.cellIterator()
        while (cellIterator.hasNext()) {
            val cell = cellIterator.next()
            cellArray.add(cell.address.column)
        }
    }
    val rowSize = rowArray.maxOf { el->el }
    //...проходим по листу
    //...и формируем массив
    return pixelMatrix
}

val rows = sheet.lastRowNum
val cells = sheet.getRow(rows).lastCellNum // + rows
val pixArray = Array(rows+1) {Array(ccc+1) {""} }

fun renderImage(pixels: ArrayList<List<String>>): BufferedImage {
    val resultImage = BufferedImage(
        pixels[0].size*10,
        pixels.size*10,
        BufferedImage.TYPE_INT_ARGB
    )
    pixels.forEachIndexed { posY, row ->
        row.forEachIndexed { posX, col ->
            drawTile(
                (posX)*10,(posY)*10, 10,
                toRGBA(col).red, toRGBA(col).green,toRGBA(col).blue,toRGBA(col).alpha,
                resultImage
            )
        }
    }
    return resultImage
}