# -*- coding: utf-8 -*-

import os
import sys
import platform
import hashlib
import json
from versionIssue import versionIssue

resSubFix   = "../updateVersion/org_res/"
hisSubFix   = "../updateVersion/{}/version/history"
ediSubFix   = "../updateVersion/{}/version/edition"
baseVersion = "1.0.0"

skipFile   = [ ".gitignore" ]
skipSuffix = [ ".meta" ]
skipFloder = [ ".svn", ".gradle", ".nomedia", ".idea", ".vscode", ".wing", "__pycache__" ]

systemName = platform.system().lower()
if( "darwin" == systemName ):
    skipFile.append( ".DS_Store" )


def validName( name, isFloder ):
    if isFloder:
        return name not in skipFloder
    else:
        if name in skipFile:
            return False
        for suffix in skipSuffix:
            if name.endswith( suffix ):
                return False
        return True


def md5(fName):
    hash_md5 = hashlib.md5()
    with open(fName, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()


def browsFloder(floder):
    fileList =  []
    currentFiles = []

    files = os.listdir(floder)
    files.sort()
    for file in files:
        childPath = os.path.join(floder, file)
        if os.path.isdir(childPath):
            if validName( file, True ):
                subFileList = browsFloder(childPath)
                fileList.extend(subFileList)
        else:
            if validName( file, False ):
                currentFiles.append(os.path.join(floder, file))

    fileList.extend(currentFiles)
    return fileList


def genFileMd5Dic(fileList):
    md5Dic = {}
    for file in fileList:
        digest = md5(file)
        md5Dic[file] = digest
    return md5Dic

def getHistoryVersion():
    resultList  = []
    historyRoot = hisSubFix
    files = os.listdir( historyRoot )
    for file in files:
        if file.endswith( ".json" ):
            resultList.append( os.path.basename(file)[8:-5] )
    return resultList


def getNowVersion():
    nowVI = versionIssue( baseVersion )

    versionList = getHistoryVersion()
    for vr in versionList:
        curVI = versionIssue( vr )
        if curVI.biggerThen(nowVI):
            nowVI = curVI

    return nowVI

def genVersionJson( pathPreFix, version):

    startPos = len(pathPreFix)
    fileList = browsFloder(pathPreFix)
    fileList.sort()
    md5Dic   = genFileMd5Dic(fileList)

    jsonStr = '{' + '"version":"{0}", "files":['.format( version )

    isFirst = True

    for file in fileList:
        if not isFirst:
            jsonStr += ","
        else:
            isFirst = False

        jsonStr += '\n{"path"'+ ':"{0}","md5":"{1}"'.format( file[startPos:].replace("\\","/"), md5Dic[file] ) + '}'

    jsonStr += ']}'
    return jsonStr


def getJsonPathByVersion(version):
    jsonFileName = "version_{}.json".format(version)
    return os.path.join( hisSubFix, jsonFileName )

def writeVersionFile(version):
    jsonFilePath = getJsonPathByVersion(version)
    jsonString   = genVersionJson( resSubFix, version)

    with open(jsonFilePath, 'w', encoding='utf-8' ) as f:
        f.write(jsonString)

def parseVersionFileToDic(version):

    jsonString = ""
    with open( getJsonPathByVersion(version), 'r', encoding='utf-8' ) as f:
        jsonString = f.read()

    dic = {}
    if 0 < len(jsonString):
        jsonRoot = json.loads( jsonString )
        jsonList = jsonRoot.get("files")
        for fileItem in jsonList:
            dic[ fileItem.get("path") ] = fileItem.get("md5")

    return dic

def genDiffJson(oldVersion, newVersion,enablePrint):
    oldDic = parseVersionFileToDic(oldVersion)
    newDic = parseVersionFileToDic(newVersion)

    jsonStr = '{' + '"newVersion":"{0}", "oldVersion":"{1}", "files":['.format( newVersion, oldVersion )

    isFirst = True

    if enablePrint:
        print( u"========{}-{}========".format( oldVersion, newVersion ) )

    for p in newDic:
        oldItemV = oldDic.get(p)
        newItemV = newDic.get(p)
        if oldItemV == None or oldItemV != newItemV:
            if enablePrint:
                if oldItemV == None:
                    print( u"++新增:{}".format( p ) )
                else:
                    print( u"<>差异:{}".format( p ) )

            if not isFirst:
                jsonStr += ","
            else:
                isFirst = False
            jsonStr += '\n{"path"'+ ':"{0}","md5":"{1}"'.format( p, newItemV ) + '}'

    jsonStr += ']}'
    return jsonStr

def mkdir(path):
    if not os.path.exists(path):
        os.makedirs(path)

def genDiffJsonVersionFile(version):
    diffPath = os.path.join(ediSubFix, version)
    mkdir(diffPath)

    lastVersionString = versionIssue(version).lastVersion().getVersion()

    versionList = getHistoryVersion()
    for versionItem in versionList:
        if version != versionItem:
            isLastVersion = ( lastVersionString == versionItem )
            diffJsonString = genDiffJson(versionItem, version, isLastVersion )
            jsonFilePath = os.path.join(diffPath, "{}-{}.json".format(versionItem, version))
            with open(jsonFilePath, 'w', encoding='utf-8') as f:
                f.write(diffJsonString)


def setPlatform(platform):
    global resSubFix
    global hisSubFix
    global ediSubFix

    resSubFix = os.path.join(sys.path[0], resSubFix )
    hisSubFix = os.path.join(sys.path[0], hisSubFix.format(platform) )
    ediSubFix = os.path.join(sys.path[0], ediSubFix.format(platform) )

    if not os.path.exists(hisSubFix):
        os.makedirs(hisSubFix)

    if not os.path.exists(ediSubFix):
        os.makedirs(ediSubFix)

def main():

    platformValue = "default"

    if None != sys.argv:
        argvLength = len(sys.argv)
        for i in range(1, argvLength):
            findPos = sys.argv[i].find('Platform=')
            if -1 != findPos:
                platformValue = sys.argv[i][findPos+9:]

    setPlatform( platformValue )


    version = None
    nowVersion  = getNowVersion()
    if nowVersion.getVersion() == baseVersion:
        version = nowVersion.nextVersion()
    else:
        nextVersion = nowVersion.nextVersion()

        tip = u"""输入1或者2选择要生成版本:\n1. version {} (生成新版本)\n2. version {} (覆盖当前最高版本) """
        print (tip.format(nextVersion.getVersion(), nowVersion.getVersion()))
        print (u'请输入:'),

        choice = input( "" )

        if choice == "1":
            version = nextVersion
        elif choice == "2":
            version = nowVersion

    if version == None:
        print("version error")
        return

    print(u"""正在生成version {}""".format(version.getVersion()))
    writeVersionFile(version.getVersion())
    genDiffJsonVersionFile(version.getVersion())

if __name__ == "__main__":
    main()