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import wx

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import wx.stc as stc

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import os, sys, shutil

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from CppSTC import CppSTC

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from plugger import PlugTemplate

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import tempfile

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class _Cfile:

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    XSD = """<?xml version="1.0" encoding="ISO-8859-1" ?>

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    <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

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      <xsd:element name="C_Extension">

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        <xsd:complexType>

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          <xsd:attribute name="C_Files" type="xsd:string" use="required" default="myfile.c"/>

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          <xsd:attribute name="CFLAGS" type="xsd:string" use="required"/>

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          <xsd:attribute name="LDFLAGS" type="xsd:string" use="required"/>

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        </xsd:complexType>

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      </xsd:element>

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    </xsd:schema>

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    """

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    def __init__(self):

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        self.CheckCFilesExist()

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    def CheckCFilesExist(self):

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        for CFile in self.CFileNames():

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            if not os.path.isfile(CFile):

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                f = open(CFile, 'w')

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                f.write("/*Empty*/")

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                f.close()

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    def CFileBaseNames(self):

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        """

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        Returns list of C files base names, out of C_Extension.C_Files, coma separated list

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        """

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        return map(str.strip,str(self.C_Extension.getC_Files()).split(','))

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    def CFileName(self, fn):

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        return os.path.join(self.PlugPath(),fn)

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    def CFileNames(self):

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        """

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        Returns list of full C files paths, out of C_Extension.C_Files, coma separated list

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        """

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        return map(self.CFileName, self.CFileBaseNames())

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    def SetParamsAttribute(self, path, value, logger):

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        """

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        Take actions if C_Files changed

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        """

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        # Get a C files list before changes

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        oldnames = self.CFileNames()

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        # Apply changes

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        res = PlugTemplate.SetParamsAttribute(self, path, value, logger)

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        # If changes was about C files,

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        if path == "C_Extension.C_Files":

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            # Create files if did not exist

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            self.CheckCFilesExist()

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            # Get new list

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            newnames = self.CFileNames()

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            # Move unused files into trash (temporary directory)

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            for oldfile in oldnames:

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                if oldfile not in newnames:

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                    # define new "trash" name

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                    trashname = os.path.join(tempfile.gettempdir(),os.path.basename(oldfile))

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                    # move the file

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                    shutil.move(oldfile, trashname)

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                    # warn user

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                    logger.write_warning("\"%s\" moved to \"%s\"\n"%(oldfile, trashname))

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            return value, False

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        return res

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    _Views = {}

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    def _OpenView(self, logger):

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        lst = self.CFileBaseNames()

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        dlg = wx.MultiChoiceDialog( self.GetPlugRoot().AppFrame, 

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                                   "Choose C files to Edit :",

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                                   "Edit", lst)

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        if (dlg.ShowModal() == wx.ID_OK):

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            selections = dlg.GetSelections()

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            for selected in [lst[x] for x in selections]:

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                if selected not in self._Views:

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                    # keep track of selected name as static for later close

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                    def _onclose(evt, sel = selected):

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                        self.SaveCView(sel)

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                        self._Views.pop(sel)

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                        evt.Skip()

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                    New_View = wx.Frame(self.GetPlugRoot().AppFrame,-1,selected)

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                    New_View.Bind(wx.EVT_CLOSE, _onclose)

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                    ed = CppSTC(New_View, wx.NewId())

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                    ed.SetText(open(self.CFileName(selected)).read())

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                    ed.EmptyUndoBuffer()

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                    ed.Colourise(0, -1)

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                    ed.SetMarginType(1, stc.STC_MARGIN_NUMBER)

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                    ed.SetMarginWidth(1, 25)

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                    New_View.ed = ed

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                    New_View.Show()

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                    self._Views[selected] = New_View

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        dlg.Destroy()

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    PluginMethods = [("Edit C File",_OpenView), ("Import C File",_OpenView)]

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    def SaveCView(self, name):

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        f = open(self.CFileName(name),'w')

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        f.write(self._Views[name].ed.GetText())

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        f.close()

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    def OnPlugSave(self):

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        for name in self._Views:

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            self.SaveCView(name)

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        return True

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    def PlugGenerate_C(self, buildpath, locations, logger):

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        """

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        Generate C code

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        @param current_location: Tupple containing plugin IEC location : %I0.0.4.5 => (0,0,4,5)

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        @param locations: List of complete variables locations \

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            [{"IEC_TYPE" : the IEC type (i.e. "INT", "STRING", ...)

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            "NAME" : name of the variable (generally "__IW0_1_2" style)

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            "DIR" : direction "Q","I" or "M"

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            "SIZE" : size "X", "B", "W", "D", "L"

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            "LOC" : tuple of interger for IEC location (0,1,2,...)

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            }, ...]

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        @return: [(C_file_name, CFLAGS),...] , LDFLAGS_TO_APPEND

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        """

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        current_location = self.GetCurrentLocation()

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        # define a unique name for the generated C file

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        location_str = "_".join(map(lambda x:str(x), current_location))

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        res = []

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        for CFile in self.CFileBaseNames():

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            f = open(Gen_Cfile_path,'w')

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            f.write("/* Header generated by Beremiz c_ext plugin */\n")

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            f.write("#include \"iec_std_lib.h\"\n")

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            f.write("#define EXT_C_INIT __init_%s\n"%location_str)

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            f.write("#define EXT_C_CLEANUP __init_%s\n"%location_str)

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            f.write("#define EXT_C_PUBLISH __init_%s\n"%location_str)

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            f.write("#define EXT_C_RETRIVE __init_%s\n"%location_str)

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            for loc in locations:

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                f.write(loc["IEC_TYPE"]+" "+loc["NAME"]+";\n")

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            f.write("/* End of header generated by Beremiz c_ext plugin */\n\n")

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            src_file = open(self.CFileName(CFile),'r')

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            f.write(src_file.read())

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            src_file.close()

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            f.close()

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            res.append((Gen_Cfile_path,str(self.C_Extension.getCFLAGS())))

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        return res,str(self.C_Extension.getLDFLAGS())

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class RootClass:

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    PlugChildsTypes = [("C_File",_Cfile)]

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    def PlugGenerate_C(self, buildpath, locations, logger):

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        return [],""

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