#!/usr/bin/python3
import ctypes, sys

#--------------------------------------+
#       Devil 1: PLD Base
#--------------------------------------+

class PldHeader(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("numOffset", ctypes.c_int),
        ("offsets",   ctypes.POINTER(ctypes.c_int))
    ]

class Devil1PLD_FN(ctypes.Structure):
    _fields_ = [
        ("getheader"   , ctypes.CFUNCTYPE(
                                          ctypes.c_bool,
                                          ctypes.POINTER(PldHeader),
                                          ctypes.c_char_p)),
        ("sizeofsector", ctypes.CFUNCTYPE(
                                          ctypes.c_int,  
                                          ctypes.POINTER(PldHeader), 
                                          ctypes.c_int)),
        ("printheader" , ctypes.CFUNCTYPE(None, 
                                          ctypes.POINTER(PldHeader)))
    ]

#--------------------------------------+
#       Devil 1: TEX Base
#--------------------------------------+

class TexturePack(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("id",               ctypes.c_char * 4), # fixed length 4, reverse order
        ("batchNumber",      ctypes.c_int),
        ("firstBatchOffset", ctypes.c_int),
        ("unknownA",         ctypes.c_int)
    ]

class TextureBatchDescriptor(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("batchIdx",    ctypes.c_int),
        ("hash",        ctypes.c_int),
        ("texNumber",   ctypes.c_int),
        ("unknownA",    ctypes.c_int * 8),
        ("textureSize", ctypes.c_int),
        ("unknownB",    ctypes.c_int * 30)
    ]

class Texture(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("data", ctypes.c_ubyte)
    ]

class TextureBatch(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("batch", ctypes.POINTER(Texture))
    ]

class Devil1TEX_FN(ctypes.Structure):
    _fields_ = [
        ("printheader",     ctypes.CFUNCTYPE(
                                 None, 
                                 ctypes.POINTER(TexturePack))),
        ("printbatchdesc",  ctypes.CFUNCTYPE(
                                 None,
                                 ctypes.POINTER(TextureBatchDescriptor))),
        ("getheader",     ctypes.CFUNCTYPE(
                                 ctypes.c_bool, 
                                 ctypes.POINTER(
                                    ctypes.POINTER(TexturePack)),
                                 ctypes.c_char_p)),
        ("getbatchdesc",    ctypes.CFUNCTYPE(
                                 ctypes.c_bool,
                                 ctypes.POINTER(
                                    ctypes.POINTER(TextureBatchDescriptor)),
                                 ctypes.c_uint,
                                 ctypes.c_char_p,
                                 ctypes.c_uint)),
        ("getbatch",        ctypes.CFUNCTYPE(
                                 ctypes.c_bool,
                                 ctypes.POINTER(
                                    ctypes.POINTER(TextureBatch)),
                                 ctypes.c_uint,
                                 ctypes.c_char_p,
                                 ctypes.c_uint)),
        ("gettextures",     ctypes.CFUNCTYPE(
                                 ctypes.c_bool,
                                 ctypes.POINTER(Texture),
                                 ctypes.c_uint,
                                 ctypes.c_char_p,
                                 ctypes.c_uint))
    ]

#--------------------------------------+
#       Devil 1: GEO Base
#--------------------------------------+

class Header(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("numMesh",        ctypes.c_ubyte),
        ("unknownNumberB", ctypes.c_ubyte),
        ("unknownNumberC", ctypes.c_ubyte),
        ("unknownNumberD", ctypes.c_ubyte),
        ("padding",        ctypes.c_int),
        ("unknownOffset",  ctypes.c_ulonglong)
    ]

class MeshHeader(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("numBatch",        ctypes.c_short),
        ("numVertex",       ctypes.c_short),
        ("u",               ctypes.c_uint),
        ("offsetBatches",   ctypes.c_ulonglong),
        ("flags",           ctypes.c_ulonglong)
    ]

class Coordinate(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("x", ctypes.c_float),
        ("y", ctypes.c_float),
        ("z", ctypes.c_float)
    ]

class UVs(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("u", ctypes.c_short),
        ("v", ctypes.c_short)
    ]

class BoneIndexes(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("indexes", ctypes.c_ubyte * 4),
    ]

class BoneWeights(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("weights", ctypes.c_short)
    ]


class BatchData(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("numVertex",           ctypes.c_short),
        ("uB",                  ctypes.c_short),
        ("padding",             ctypes.c_uint),
        ("offsetPositions",     ctypes.c_ulonglong),
        ("offsetNormals",       ctypes.c_ulonglong),
        ("offsetUVs",           ctypes.c_ulonglong),
        ("offsetBoneIndexes",   ctypes.c_ulonglong),
        ("offsetBoneWeights",   ctypes.c_ulonglong),
        ("offsets",             ctypes.c_ulonglong)
    ]

class VertexData(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("positions",   ctypes.POINTER(Coordinate)),
        ("normals",     ctypes.POINTER(Coordinate)),
        ("u",           ctypes.POINTER(UVs)),
        ("bi",          ctypes.POINTER(BoneIndexes)),
        ("bw",          ctypes.POINTER(BoneWeights))
    ]

class Batch(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("bd", ctypes.POINTER(BatchData)),
        ("vd", VertexData)
    ]

class Mesh(ctypes.Structure):
    _pack_   = 1
    _fields_ = [
        ("b", ctypes.POINTER(Batch))
    ]

class Devil1GEO_FN(ctypes.Structure):
    _fields_ = [
        ("printheader",     ctypes.CFUNCTYPE(
                                     None,
                                     ctypes.POINTER(Header))),
        ("printmeshheader", ctypes.CFUNCTYPE(
                                     None,
                                     ctypes.POINTER(MeshHeader))),
        ("printbatch",      ctypes.CFUNCTYPE(
                                     None,
                                     ctypes.POINTER(Batch))),
        ("printcoordinate", ctypes.CFUNCTYPE(
                                     None,
                                     ctypes.POINTER(Coordinate))),
        ("getheader",       ctypes.CFUNCTYPE(
                                     None,
                                     ctypes.POINTER(ctypes.POINTER(Header)),
                                     ctypes.c_char_p)),
        ("getmeshheader",   ctypes.CFUNCTYPE(
                                     ctypes.c_bool,
                                     ctypes.POINTER(ctypes.POINTER(MeshHeader)),
                                     ctypes.c_uint,
                                     ctypes.c_char_p)),
        ("getbatch",        ctypes.CFUNCTYPE(
                                     ctypes.c_bool,
                                     ctypes.POINTER(Batch),
                                     ctypes.c_uint,
                                     ctypes.c_char_p)),
        ("getmesh",         ctypes.CFUNCTYPE(
                                     ctypes.c_bool,
                                     ctypes.POINTER(Mesh),
                                     ctypes.c_uint,
                                     ctypes.c_char_p,
                                     ctypes.c_uint))
    ]

#--------------------------------------+
#       Python Objs
#--------------------------------------+

sharedlib = './lib3ddevil1.so'
libc      = ctypes.cdll.LoadLibrary(sharedlib)
if not libc:
    print("Couldn't load %s" % sharedlib)
    sys.exit()
    
print("\nlib3ddevil1 loaded.")
devil1pld = Devil1PLD_FN.in_dll(libc, "DEVIL1PLD")
devil1tex = Devil1TEX_FN.in_dll(libc, "DEVIL1TEX")
devil1geo = Devil1GEO_FN.in_dll(libc, "DEVIL1GEO")

class PLDHeader:
    def __init__(self, filedata = None):
        # Store C Struct in order to call C functions
        self.cstruct = PldHeader()
        if filedata:
            devil1pld.getheader(ctypes.byref(self.cstruct), filedata)
            self.eof = len(filedata)

    def show(self):
        devil1pld.printheader(ctypes.byref(self.cstruct))
        return

    def getnumoffsets(self):
        return self.cstruct.numOffsets

    # return pythonic list of offsets
    def getoffsets(self):
        return self.cstruct.offsets[:self.cstruct.numOffset]

    def sizeofsector(self, i):
        ptr = ctypes.byref(self.cstruct)
        return devil1pld.sizeofsector(ptr, i, self.eof)

class TEXturePack:
    def __init__(self, filedata):
        self.cstruct = ctypes.pointer(TexturePack())
        devil1tex.getheader(ctypes.byref(self.cstruct), filedata)
        return

    def show(self):
        devil1tex.printheader(self.cstruct)

    def getbatchno(self):
        return self.cstruct.contents.batchNumber

    def getfirstbatchoffset(self):
        return self.cstruct.contents.firstBatchOffset

class TEXtureBatchDescriptor:
    def __init__(self, i, filedata):
        self.cstruct = ctypes.pointer(TextureBatchDescriptor())
        ptrofptr = ctypes.byref(self.cstruct)
        if filedata:
            devil1tex.getbatchdesc(ptrofptr, i, filedata, len(filedata))
        return

    def show(self):
        devil1tex.printbatchdesc(self.cstruct)

    def getbatchidx(self):
        return self.cstruct.contents.batchIdx

    def gethash(self):
        return self.cstruct.contents.hash

    def gettexno(self):
        return self.cstruct.contents.texNumber

    def gettexturesize(self):
        return self.cstruct.contents.textureSize


# Needs testing / correction - gettextures will 'return by parameter' 
# a dynamic array of textures. Need to be able to access multiple Texture()
class TEXtures:
    def __init__(self, i, count, filedata):
        self.cstruct = ctypes.byref(Texture())
        if filedata:
            devil1tex.gettextures(self.cstruct, i, filedata, len(filedata))
        return

class GEOHeader:
    def __init__(self, filedata):
        self.cstruct = ctypes.pointer(Header())
        ptrofptr = ctypes.byref(self.cstruct)
        if filedata:
            devil1geo.getheader(ptrofptr, filedata)
        return

    def show(self):
        devil1geo.printheader(self.cstruct)
    pass

class MEShHeader:
    def __init__(self, i, filedata):
        self.cstruct = ctypes.pointer(MeshHeader())
        ptrofptr = ctypes.byref(self.cstruct)
        if filedata:
            devil1geo.getmeshheader(ptrofptr, i, filedata)
        return
    pass

    def show(self):
        devil1geo.printmeshheader(self.cstruct)

    def getbatchno(self):
        return self.cstruct.contents.numBatch

class MEsh:
    def __init__(self, i, filedata):
        self.cstruct = Mesh()
        if filedata:
            mh = MEShHeader(i, filedata)
            # allocate memory for the size of batch * number of batches
            memsize = ctypes.sizeof(Batch) * mh.getbatchno()
            self.cstruct.b = ctypes.cast(ctypes.create_string_buffer(memsize), 
                                         ctypes.POINTER(Batch))
            if not devil1geo.getmesh(ctypes.byref(self.cstruct), 
                              i, 
                              filedata, 
                              len(filedata)):
                print("failed to get mesh")
        return

    def show(self):
        if self.cstruct.b:
            devil1geo.printbatch(self.cstruct.b)
        else:
            print("nothing to show")

#--------------------------------------+
#       Regular Python
#--------------------------------------+
if __name__ == "__main__":
    def pldtest(devil1pld, pldheader):
        with open("pl01.pld", "rb") as f:
            data = f.read()
            devil1pld.getheader(ctypes.byref(pldheader), data)
            devil1pld.printheader(ctypes.byref(pldheader))
           # for offset in pldheader.getoffsets():
           #     print(hex(offset))

    def textest(devil1tex, texheader):
        print("texture test")
        with open("pl01.pld_1.txp", "rb") as f:
            data = f.read()
#            texheader = ctypes.cast(data, ctypes.POINTER(TexturePack))
            th = ctypes.pointer(texheader)
            devil1tex.getheader(ctypes.byref(th), data)
            devil1tex.printheader(th)
            batchdesc = TextureBatchDescriptor()
            bd = ctypes.pointer(batchdesc)
            print("\nbatch descriptor:")
            devil1tex.getbatchdesc(ctypes.byref(bd), 1, data, len(data))
            devil1tex.printbatchdesc(bd)
            print(bd.contents.textureSize)

    def geotest(devil1geo, geoheader):
        print("geo test")
        with open("pl00.pld_0", "rb") as f:
            data = f.read()
#            geoheader = ctypes.cast(data, ctypes.POINTER(Header))
            gh = ctypes.pointer(geoheader)
            devil1geo.getheader(ctypes.byref(gh), data)
            devil1geo.printheader(gh)
            meshheader = MeshHeader()
            mh = ctypes.pointer(meshheader)
            devil1geo.getmeshheader(ctypes.byref(mh), 1, data)
            devil1geo.printmeshheader(mh)

    def main():
        sharedlib='./lib3ddevil1.so'
        libc = ctypes.cdll.LoadLibrary(sharedlib)
        if (not libc):
            print("Couldn't load %s" % sharedlib)
            return 1
        print("OK")

        pldfn = Devil1PLD_FN.in_dll(libc, "DEVIL1PLD")
        pldh = PldHeader()
        pldtest(pldfn, pldh)

        texfn = Devil1TEX_FN.in_dll(libc, "DEVIL1TEX")
        texh = TexturePack()
        textest(texfn, texh)

        geofn = Devil1GEO_FN.in_dll(libc, "DEVIL1GEO")
        geoh = Header()
        geotest(geofn, geoh)

    def mainx():
        with open("pl01.pld", "rb") as f:
            data = f.read()
            pld = PLDHeader(data)
            pld.show()
            pld2 = PLDHeader()
            pld2.show()

        with open("pl01.pld_1.txp", "rb") as f:
            data = f.read()
            txp = TEXturePack(data)
            txp.show()
            print(txp.getbatchno())
            print(txp.getfirstbatchoffset())
            tbd = TEXtureBatchDescriptor(1, data)
            tbd.show()
            print(tbd.gettexturesize())
            tx = TEXtures(0, tbd.gettexno(), data)

        with open("pl00.pld_0", "rb") as f:
            data = f.read()
            gh = GEOHeader(data)
            gh.show()
            mh = MEShHeader(3, data)
            mh.show()
            m = MEsh(0, data)
            m.show()
#---------------------------------------+
   # main()
    mainx()