#!python
import os, sys
import json
from PIL import Image


def convertImage( fileName ):
    findIndex = fileName.rfind( '.' )
    pngName = fileName[0:findIndex] + ".png"

    imageVal = Image.open(fileName)
    imageVal.save( pngName )
    imageVal.close()

    os.remove( fileName )

    fileMetaPath = fileName + ".meta"
    if os.path.exists( fileMetaPath ):
        os.rename( fileMetaPath, pngName + ".meta" )


def run(inFolder,outFolder):
    if not os.path.isdir(outFolder):
        os.mkdir(outFolder)

    schemePath = os.path.join(inFolder, 'Contents.json')
    iconPath   = os.path.join(inFolder, 'icon.png')

    try:
        org_image = Image.open(iconPath)
    except FileNotFoundError:
        print('missing icon file:' + iconPath)
        return

    try:
        f = open( schemePath, 'r', encoding='utf-8' )
        jsonString = f.read()
        if 0 < len(jsonString):
            jsonRoot = json.loads( jsonString )
        f.close()
    except FileNotFoundError:
        print( 'missing scheme file:' + schemePath )
        return

    frameList = jsonRoot.get("images")


    for frameData in frameList:

        itemName = frameData.get("filename")
        sizeVal  = frameData.get("size")
        strScale = frameData.get("scale")

        indexSize = sizeVal.find( 'x' )
        if -1 != indexSize:
            widthVal  = float( sizeVal[0:indexSize] )
            heightVal = float( sizeVal[indexSize+1:])
        else:
            widthVal = heightVal = int( sizeVal )

        indexSize = strScale.find( 'x' )
        if -1 != indexSize:
            scaleVal = float( strScale[0:indexSize] )
        else:
            scaleVal = float( strScale )

        curSize  = ( round(widthVal * scaleVal), round(heightVal * scaleVal) )
        curImage = org_image.resize( curSize, 5 ) #Resampling.HAMMING
        curImage.save( os.path.join(outFolder, itemName ) )


if __name__ == '__main__':
    run('in','out')