import os, hashlib, struct, subprocess, fnmatch, shutil, urllib, array
import wx
import png

from hashlib import md5
from Crypto.Cipher import AES
from Struct import Struct

from common import *
from title import *

class Savegame():
	class savegameHeader(Struct):
		__endian__ = Struct.BE
		def __format__(self):
			self.savegameId = Struct.uint32[2]
			self.bannerSize = Struct.uint32
			self.permissions = Struct.uint8
			self.unknown1 = Struct.uint8
			self.md5hash = Struct.uint32[4]
			self.unknown2 = Struct.uint16

	class savegameBanner(Struct):
		__endian__ = Struct.BE
		def __format__(self):
			self.magic = Struct.string(4)
			self.reserved = Struct.uint8[4]
			self.flags = Struct.uint32
			self.reserved = Struct.uint32[5]
			self.gameTitle = Struct.string(64)
			self.gameSubTitle = Struct.string(64)
			self.banner = Struct.uint8[24576]
			self.icon0 = Struct.uint8[4608]
			self.icon1 = Struct.uint8[4608]
			self.icon2 = Struct.uint8[4608]
			self.icon3 = Struct.uint8[4608]
			self.icon4 = Struct.uint8[4608]
			self.icon5 = Struct.uint8[4608]
			self.icon6 = Struct.uint8[4608]
			self.icon7 = Struct.uint8[4608]

	class backupHeader(Struct):
		__endian__ = Struct.BE
		def __format__(self):
			self.hdrSize = Struct.uint32
			self.magic = Struct.string(2)
			self.version = Struct.uint16
			self.NGid = Struct.uint32
			self.filesCount = Struct.uint32
			self.filesSize = Struct.uint32
			self.unknown1 = Struct.uint32
			self.unknown2 = Struct.uint32
			self.totalSize = Struct.uint32
			self.unknown3 = Struct.uint8[64]
			self.unknown4 = Struct.uint32
			self.gameId = Struct.string(4)
			self.wiiMacAddr = Struct.uint8[6]
			self.unknown6 = Struct.uint16
			self.padding = Struct.uint32[4]

	class fileHeader(Struct):
		__endian__ = Struct.BE
		def __format__(self):
			self.magic = Struct.uint32
			self.size = Struct.uint32
			self.permissions = Struct.uint8
			self.attribute = Struct.uint8
			self.type = Struct.uint8
			self.name = Struct.string(12, stripNulls=True) #Need a way to stop this to the 1st null char
			self.fileIV = Struct.uint32[4]
			self.unknown = Struct.uint8[10]

	def __init__(self, f):
		self.f = f
		self.fd = open(f, 'r+b')

		self.sdKey = '\xab\x01\xb9\xd8\xe1\x62\x2b\x08\xaf\xba\xd8\x4d\xbf\xc2\xa5\x5d'
		self.sdIv = '\x21\x67\x12\xe6\xaa\x1f\x68\x9f\x95\xc5\xa2\x23\x24\xdc\x6a\x98'

		try:
			os.mkdir(self.f.replace(".", "_") + "_out")
		except:
			pass

		os.chdir(self.f.replace(".", "_") + "_out")

		self.iconCount = 1

	def __str__(self):
		ret = ''
		ret += '\nSavegame header \n'

		ret += 'Savegame ID : 0x%x%x\n' % (self.hdr.savegameId[0], self.hdr.savegameId[1])
		ret += 'Banner size : 0x%x\n' % self.hdr.bannerSize
		ret += 'Permissions : 0x%x\n' % self.hdr.permissions
		ret += 'Unknown : 0x%x\n' % self.hdr.unknown1
		ret += 'MD5 hash : 0x%x%x%x%x\n' % (self.hdr.md5hash[0], self.hdr.md5hash[1], self.hdr.md5hash[2], self.hdr.md5hash[3])
		ret += 'Unknown : 0x%x\n' % self.hdr.unknown2

		ret += '\nBanner header \n'

		ret += 'Flags : 0x%x\n' % self.bnr.flags
		ret += 'Game title : %s\n' % self.bnr.gameTitle
		ret += 'Game subtitle : %s\n' % self.bnr.gameSubTitle

		ret += '\nBackup header \n'

		ret += 'Header size : 0x%x (+ 0x10 of padding) version 0x%x\n' % (self.bkHdr.hdrSize, self.bkHdr.version)
		ret += 'Wii MAC address %02x:%02x:%02x:%02x:%02x:%02x\n' % (self.bkHdr.wiiMacAddr[0], self.bkHdr.wiiMacAddr[1], self.bkHdr.wiiMacAddr[2], self.bkHdr.wiiMacAddr[3], self.bkHdr.wiiMacAddr[4], self.bkHdr.wiiMacAddr[5])
		ret += 'Found %i files for %i bytes\n' % (self.bkHdr.filesCount, self.bkHdr.filesSize)
		ret += 'Total size : %i bytes\n' % self.bkHdr.totalSize
		if self.bkHdr.gameId[3] == 'P':
			ret += 'Region : PAL\n'
		elif self.bkHdr.gameId[3] == 'E':
			ret += 'Region : NTSC\n'
		elif self.bkHdr.gameId[3] == 'J':
			ret += 'Region : JAP\n'
		ret += 'Game ID : %s\n' % self.bkHdr.gameId
		ret += 'NG id : 0x%x\n' % self.bkHdr.NGid

		return ret

	def extractFile(self, index):
		if index > self.bkHdr.filesCount:
			raise ValueError

		self.fd.seek(self.fileStartOffset)

		for i in range(self.bkHdr.filesCount):

			fileHdr = self.fd.read(0x80)
			fileHdr = self.fileHeader().unpack(fileHdr)

			if fileHdr.magic != 0x03adf17e:
				raise ValueError('Wrong file magic')

			fileHdr.size = align(fileHdr.size, 64)

			print 'File name : %s (%ib)' % (fileHdr.name, fileHdr.size)
			print 'Type [%i] Attribute [%i] Permission [%i]' % (fileHdr.type, fileHdr.attribute, fileHdr.permissions)
			print 'File IV : 0x%x%x%x%x' % (fileHdr.fileIV[0], fileHdr.fileIV[1], fileHdr.fileIV[2], fileHdr.fileIV[3])

			if fileHdr.type == 1:
				fileBuffer = self.fd.read(fileHdr.size)
				fileBuffer = Crypto().DecryptData(self.sdKey, struct.pack('>IIII', *fileHdr.fileIV), fileBuffer, True)
				open(fileHdr.name.rstrip('\0'), 'r+b').write(fileBuffer)
			elif fileHdr.type == 2:
				try:
					os.mkdir(fileHdr.name.rstrip('\0'))
				except:
					pass

	def analyzeHeader(self):
		headerBuffer = self.fd.read(0xF0BF + 1)
		headerBuffer = Crypto().DecryptData(self.sdKey, self.sdIv, headerBuffer, True)

		self.hdr = self.savegameHeader().unpack(headerBuffer[:0x20])

		#MD5 check fail always ...
		#list(headerBuffer)[0x000E:0x001E] = '\x0e\x65\x37\x81\x99\xbe\x45\x17\xab\x06\xec\x22\x45\x1a\x57\x93'
		#print '0x%x%x%x%x %s' % (self.hdr.md5hash[0], self.hdr.md5hash[1], self.hdr.md5hash[2], self.hdr.md5hash[3], hashlib.md5(headerBuffer[:0x20]).hexdigest())

		self.bnr = self.savegameBanner().unpack(headerBuffer[0x20:])

		if self.bnr.magic != 'WIBN':
			raise ValueError ('Wrong magic, should be WIBN')

		if self.hdr.bannerSize == 0xF0C0:
			self.iconCount += 7

		bkHdrBuffer = self.fd.read(0x80)
		self.bkHdr = self.backupHeader().unpack(bkHdrBuffer)

		if self.bkHdr.magic != 'Bk' or self.bkHdr.hdrSize != 0x70:
			raise ValueError ('Bk header error')

		self.fileStartOffset = self.fd.tell()

	def getBanner(self):
		open('bnr.bin', 'w+b').write(struct.pack('24576I', *self.bnr.banner))

	def getIcon(self, index):
		if index < 0 or index > 7 or index > self.iconCount:
			return -1
		if index == 0:
			return self.bnr.icon0
		if index == 1:
			return self.bnr.icon1
		if index == 2:
			return self.bnr.icon2
		if index == 3:
			return self.bnr.icon3
		if index == 4:
			return self.bnr.icon4
		if index == 5:
			return self.bnr.icon5
		if index == 6:
			return self.bnr.icon6
		if index == 7:
			return self.bnr.icon7


	def getIconsCount(self):
		return self.iconCount

	def getSaveString(self, string):
		if string == 'GAMEID':
			return self.bkHdr.gameId
		elif string == 'GAMETITLE':
			return self.bnr.gameTitle
		elif string == 'GAMESUBTITLE':
			return self.bnr.gameSubTitle

	def getFilesCount(self):
		return self.bkHdr.filesCount