# Copyright (c) 2011 The Chromium Embedded Framework Authors. All rights
# reserved. Use of this source code is governed by a BSD-style license that
# can be found in the LICENSE file.

from cef_parser import *

def make_ctocpp_header(header, clsname):
    cls = header.get_class(clsname)
    if cls is None:
        raise Exception('Class does not exist: '+clsname)
    
    clientside = cls.is_client_side()
    defname = string.upper(get_capi_name(clsname[3:], False))
    capiname = cls.get_capi_name()
    
    result = get_copyright()

    result += '#ifndef CEF_LIBCEF_DLL_CTOCPP_'+defname+'_CTOCPP_H_\n'+ \
              '#define CEF_LIBCEF_DLL_CTOCPP_'+defname+'_CTOCPP_H_\n' + \
              '#pragma once\n'
    
    if clientside:
        result += """
#ifndef BUILDING_CEF_SHARED
#pragma message("Warning: "__FILE__" may be accessed DLL-side only")
#else  // BUILDING_CEF_SHARED
"""
    else:
        result += """
#ifndef USING_CEF_SHARED
#pragma message("Warning: "__FILE__" may be accessed wrapper-side only")
#else  // USING_CEF_SHARED
"""

    # build the function body
    func_body = ''
    funcs = cls.get_virtual_funcs()
    for func in funcs:
        func_body += '  virtual '+func.get_cpp_proto()+' OVERRIDE;\n'
    
    # include standard headers
    if func_body.find('std::map') > 0 or func_body.find('std::multimap') > 0:
        result += '\n#include <map>'
    if func_body.find('std::vector') > 0:
        result += '\n#include <vector>'

    # include the headers for this class
    result += '\n#include "include/'+cls.get_file_name()+'"'+ \
              '\n#include "include/capi/'+cls.get_capi_file_name()+'"\n'

    # include headers for any forward declared classes that are not in the same file
    declares = cls.get_forward_declares()
    for declare in declares:
        dcls = header.get_class(declare)
        if dcls.get_file_name() != cls.get_file_name():
              result += '#include "include/'+dcls.get_file_name()+'"\n' \
                        '#include "include/capi/'+dcls.get_capi_file_name()+'"\n'
              
    result += """#include "libcef_dll/ctocpp/ctocpp.h"

// Wrap a C structure with a C++ class.
"""

    if clientside:
        result += '// This class may be instantiated and accessed DLL-side only.\n'
    else:
        result += '// This class may be instantiated and accessed wrapper-side only.\n'
    
    result +=   'class '+clsname+'CToCpp\n'+ \
                '    : public CefCToCpp<'+clsname+'CToCpp, '+clsname+', '+capiname+'> {\n'+ \
                ' public:\n'+ \
                '  explicit '+clsname+'CToCpp('+capiname+'* str)\n'+ \
                '      : CefCToCpp<'+clsname+'CToCpp, '+clsname+', '+capiname+'>(str) {}\n'+ \
                '  virtual ~'+clsname+'CToCpp() {}\n\n'+ \
                '  // '+clsname+' methods\n';
    
    result +=   func_body
    result +=   '};\n\n'
    
    if clientside:
        result += '#endif  // BUILDING_CEF_SHARED\n'
    else:
        result += '#endif  // USING_CEF_SHARED\n'
    
    result += '#endif  // CEF_LIBCEF_DLL_CTOCPP_'+defname+'_CTOCPP_H_\n'
    
    return wrap_code(result)


def write_ctocpp_header(header, clsname, dir, backup):
    file = dir+os.sep+get_capi_name(clsname[3:], False)+'_ctocpp.h'
    
    if path_exists(file):
        oldcontents = read_file(file)
    else:
        oldcontents = ''
    
    newcontents = make_ctocpp_header(header, clsname)
    if newcontents != oldcontents:
        if backup and oldcontents != '':
            backup_file(file)
        write_file(file, newcontents)
        return True
    
    return False


# test the module
if __name__ == "__main__":
    import sys
    
    # verify that the correct number of command-line arguments are provided
    if len(sys.argv) < 3:
        sys.stderr.write('Usage: '+sys.argv[0]+' <infile> <classname>')
        sys.exit()
        
    # create the header object
    header = obj_header()
    header.add_file(sys.argv[1])
    
    # dump the result to stdout
    sys.stdout.write(make_ctocpp_header(header, sys.argv[2]))