package nl.aegeedelft.watermarker

import org.intellij.lang.annotations.Language
import java.awt.BorderLayout
import java.awt.Component
import java.awt.Dimension
import java.awt.Image
import java.awt.image.BufferedImage
import java.awt.image.RenderedImage
import java.io.BufferedInputStream
import java.io.ByteArrayInputStream
import java.io.File
import java.util.concurrent.atomic.AtomicInteger
import javax.imageio.IIOImage
import javax.imageio.ImageIO
import javax.imageio.ImageWriteParam
import javax.imageio.stream.MemoryCacheImageOutputStream
import javax.swing.*
import javax.swing.filechooser.FileFilter
import kotlin.concurrent.fixedRateTimer
import kotlin.concurrent.thread


@Language("RegExp")
val filenameRegex = ".*\\.(png|jpe?g|bmp)".toRegex()

val jf = JFrame("WaterMarker")

val counter = AtomicInteger()
val runbtn = JButton("Run!")

val pbar = JProgressBar()

val dlg = JDialog(jf, "Progress Dialog", true)


fun main(args: Array<String>) {
    var watermark: File? = null
    var outdir: File? = null
    var basedir: File? = null

    val basepicker = JFileChooser()
    val bds = JLabel("Pick an input folder")
    val outpicker = JFileChooser()
    val ods = JLabel("Pick an output folder")
    val wmpicker = JFileChooser()
    val wms = JLabel("Pick a Watermark file")

    val box = Box.createVerticalBox()



    basepicker.currentDirectory = File(".")
    basepicker.fileSelectionMode = JFileChooser.DIRECTORIES_ONLY
    basepicker.isAcceptAllFileFilterUsed = false

    outpicker.currentDirectory = File(".")
    outpicker.fileSelectionMode = JFileChooser.DIRECTORIES_ONLY
    outpicker.isAcceptAllFileFilterUsed = false

    wmpicker.currentDirectory = File(".")
    wmpicker.fileSelectionMode = JFileChooser.FILES_ONLY
    wmpicker.fileFilter = object : FileFilter() {
        override fun accept(f: File): Boolean = filenameRegex.matches(f.name) or f.isDirectory

        override fun getDescription(): String = "Image Files"
    }
    wmpicker.isAcceptAllFileFilterUsed = false

    box.add(
        JButton("Select Input").apply {
            addActionListener {
                val c = basepicker.showOpenDialog(jf)
                if (c == JFileChooser.APPROVE_OPTION) {
                    basedir = basepicker.selectedFile
                    bds.text = basepicker.selectedFile.path
                }
            }
        }.forceToCenter()
    )
    box.add(bds.forceToCenter())

    box.add(
        JButton("Select Output").apply {
            addActionListener {
                val c = outpicker.showOpenDialog(jf)
                if (c == JFileChooser.APPROVE_OPTION) {
                    outdir = outpicker.selectedFile
                    ods.text = outpicker.selectedFile.path
                }
            }
        }.forceToCenter()
    )
    box.add(ods.forceToCenter())

    box.add(
        JButton("Select Watermark").apply {
            addActionListener {
                val c = wmpicker.showOpenDialog(jf)
                if (c == JFileChooser.APPROVE_OPTION) {
                    watermark = wmpicker.selectedFile
                    wms.text = wmpicker.selectedFile.path
                }
            }
        }.forceToCenter()
    )
    box.add(wms.forceToCenter())
    runbtn.apply {
        addActionListener {
            if (watermark != null && outdir != null && basedir != null) {
                this.isEnabled = false
                thread {
                    doTheThing(basedir!!, outdir!!, watermark!!)
                }
            } else {
                JOptionPane.showMessageDialog(
                    jf,
                    "You have left one of the files empty!",
                    "Error!",
                    JOptionPane.ERROR_MESSAGE
                )
            }
        }
    }
    box.add(runbtn.forceToCenter())

    jf.add(box, BorderLayout.CENTER)

    jf.setLocationRelativeTo(null)
    jf.defaultCloseOperation = JFrame.EXIT_ON_CLOSE
    jf.preferredSize = Dimension(300, 300)
    jf.size = jf.preferredSize
    jf.isVisible = true

    dlg.add(BorderLayout.CENTER, pbar)
    dlg.defaultCloseOperation = JDialog.DO_NOTHING_ON_CLOSE
    dlg.setSize(300, 75)
    dlg.setLocationRelativeTo(jf)
}

fun doTheThing(basedir: File, outdir: File, watermarkpath: File) {
    val wmbase = ImageIO.read(watermarkpath)

    val scale = 3.6
    //JOptionPane.showMessageDialog(jf, "", "Inserting watermark!", JOptionPane.INFORMATION_MESSAGE, ImageIcon(watermark))
    //FrmPopUpInfo("Inserting Watermark", watermark)
    val files = basedir.listFiles().filter { filenameRegex.matches(it.name) }.chunked(5)
    val propersize = files.sumBy { it.size }
    counter.set(0)
    SwingUtilities.invokeLater {
        pbar.value = 0
        pbar.maximum = propersize
        dlg.isVisible = true
    }

    fixedRateTimer("theWait", period = 500, initialDelay = 0) {
        if (counter.get() == propersize) {
            SwingUtilities.invokeLater {
                dlg.isVisible = false
                runbtn.isEnabled = true
                this.cancel()
            }
        }
    }

    for (fl in files) {
        thread {
            for (f in fl) {
                if (filenameRegex.matches(f.name.toString()) && !"jpe?g".toRegex().matches(f.extension)) {
                    val image = ImageIO.read(f)

                    val combined =
                        addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage

                    ImageIO.write(combined, "JPG", File(outdir, f.nameWithoutExtension + ".jpg"))
                } else {
                    val `is` = BufferedInputStream(ByteArrayInputStream(f.readBytes()))
                    val it = ImageIO.getImageReadersByMIMEType("image/jpeg")
                    val reader = it.next()
                    val iis = ImageIO.createImageInputStream(`is`)
                    reader.setInput(iis, false, false)
                    val image = reader.read(0)
                    val imageMetadata = reader.getImageMetadata(0)

                    val combined =
                        addWM(resize(wmbase, wmbase.width / scale, wmbase.height / scale), image) as RenderedImage

                    val iter = ImageIO.getImageWritersByMIMEType("image/jpeg")
                    val writer = iter.next()
                    val iwp = writer.defaultWriteParam
                    iwp.compressionMode = ImageWriteParam.MODE_EXPLICIT
                    iwp.compressionQuality = 0.9f
                    val imgOut = MemoryCacheImageOutputStream(File(outdir, f.nameWithoutExtension + ".jpg").outputStream())
                    writer.output = imgOut
                    val ending = IIOImage(combined, null, imageMetadata)
                    writer.write(null, ending, iwp)
                    writer.dispose()
                }
                SwingUtilities.invokeLater {
                    pbar.value = counter.incrementAndGet()
                }
            }
        }
    }

}

fun Component.forceToCenter(): Component = JPanel().apply { this.add(this@forceToCenter) }

fun addWM(watermark: BufferedImage, image: BufferedImage): Image {
    val combined = BufferedImage(image.width, image.height, BufferedImage.TYPE_INT_RGB)
    val g = combined.graphics
    g.drawImage(image, 0, 0, null)
    val x = image.width - watermark.width - 5
    val y = image.height - watermark.height - 5
    g.drawImage(watermark, x, y, null)
    return combined
}

fun resize(img: BufferedImage, newW: Double, newH: Double): BufferedImage {

    val tmp = img.getScaledInstance(newW.toInt(), newH.toInt(), Image.SCALE_SMOOTH)
    val dimg = BufferedImage(newW.toInt(), newH.toInt(), BufferedImage.TYPE_INT_ARGB)

    val g2d = dimg.createGraphics()
    g2d.drawImage(tmp, 0, 0, null)
    g2d.dispose()

    return dimg
}

//class FrmPopUpInfo(message: String, image: Image) : JFrame() {
//    init {
//        this.title = message
//        this.add(JLabel(ImageIcon(image)))
//        this.background = Color.WHITE
//        this.pack()
//
//        this.setLocationRelativeTo(null)
//        obs.addObserver { _, _ ->
//            java.util.Timer().schedule(timerTask {
//
//            }, 5 * 1000)
//            this@FrmPopUpInfo.isVisible = false
//
//            this@FrmPopUpInfo.dispose()
//        }
//
//        this.isVisible = true
//    }
//}