import os, sys, re
import CppHeaderParser
import argparse
import string

LICENSE = \
'/*\n' + \
'Copyright (c) 2018 Advanced Micro Devices, Inc. All rights reserved.\n' + \
'\n' + \
'Permission is hereby granted, free of charge, to any person obtaining a copy\n' + \
'of this software and associated documentation files (the "Software"), to deal\n' + \
'in the Software without restriction, including without limitation the rights\n' + \
'to use, copy, modify, merge, publish, distribute, sublicense, and/or sell\n' + \
'copies of the Software, and to permit persons to whom the Software is\n' + \
'furnished to do so, subject to the following conditions:\n' + \
'\n' + \
'The above copyright notice and this permission notice shall be included in\n' + \
'all copies or substantial portions of the Software.\n' + \
'\n' + \
'THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n' + \
'IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n' + \
'FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE\n' + \
'AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n' + \
'LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n' + \
'OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n' + \
'THE SOFTWARE.\n' + \
'*/\n'


header_basic = \
'template <typename T>\n' + \
'  inline static std::ostream& operator<<(std::ostream& out, const T& v) {\n' + \
'     using std::operator<<;\n' + \
'     static bool recursion = false;\n' + \
'     if (recursion == false) { recursion = true; out << v; recursion = false; }\n' + \
'     return out; }\n'

structs_analyzed = {}
global_ops = ''
global_str = ''
output_filename_h = None
apiname = ""

# process_struct traverses recursively all structs to extract all fields
def process_struct(file_handle, cppHeader_struct, cppHeader, parent_hier_name, apiname):
# file_handle: handle for output file {api_name}_ostream_ops.h to be generated
# cppHeader_struct: cppHeader struct being processed
# cppHeader: cppHeader object created by CppHeaderParser.CppHeader(...)
# parent_hier_name: parent hierarchical name used for nested structs/enums
# apiname: for example hip.
    global global_str

    if cppHeader_struct == 'max_align_t': #function pointers not working in cppheaderparser
        return
    if cppHeader_struct not in cppHeader.classes:
        return
    if cppHeader_struct in structs_analyzed:
        return
    structs_analyzed[cppHeader_struct] = 1
    for l in reversed(range(len(cppHeader.classes[cppHeader_struct]["properties"]["public"]))):
        key = 'name'
        name = ""
        if key in cppHeader.classes[cppHeader_struct]["properties"]["public"][l]:
           if parent_hier_name != '':
             name = parent_hier_name + '.' + cppHeader.classes[cppHeader_struct]["properties"]["public"][l][key]
           else:
             name = cppHeader.classes[cppHeader_struct]["properties"]["public"][l][key]
        if name == '':
           continue
        key2 = 'type'
        mtype = ""
        if key2 in cppHeader.classes[cppHeader_struct]["properties"]["public"][l]:
            mtype = cppHeader.classes[cppHeader_struct]["properties"]["public"][l][key2]
        if mtype == '':
          continue
        key3 = 'array_size'
        array_size = ""
        if key3 in cppHeader.classes[cppHeader_struct]["properties"]["public"][l]:
            array_size = cppHeader.classes[cppHeader_struct]["properties"]["public"][l][key3]
        key4 = 'property_of_class'
        prop = ""
        if  key4 in cppHeader.classes[cppHeader_struct]["properties"]["public"][l]:
            prop = cppHeader.classes[cppHeader_struct]["properties"]["public"][l][key4]

        str = ''
        if "union" not in mtype:
            indent = ""
            str += "    if (std::string(\"" + cppHeader_struct + "::" + name + "\").find(" + apiname.upper() + "_structs_regex" + ") != std::string::npos)   {\n"
            indent = "    "
            str += indent + "  roctracer::" + apiname.lower() + "_support::operator<<(out, \"" + name + "=\");\n"
            str += indent + "  roctracer::" + apiname.lower() + "_support::operator<<(out, v." + name + ");\n"
            str += indent + "  roctracer::" + apiname.lower() + "_support::operator<<(out, \", \");\n"
            str += "    }\n"
            if "void" not in mtype:
                global_str += str
        else:
            if prop != '':
              next_cppHeader_struct = prop + "::"
              process_struct(file_handle, next_cppHeader_struct, cppHeader, name, apiname)
              next_cppHeader_struct = prop + "::" + mtype + " "
              process_struct(file_handle, next_cppHeader_struct, cppHeader, name, apiname)
            next_cppHeader_struct = cppHeader_struct + "::"
            process_struct(file_handle, next_cppHeader_struct, cppHeader, name, apiname)

#  Parses API header file and generates ostream ops files ostream_ops.h
def gen_cppheader(infilepath, outfilepath, rank):
# infilepath: API Header file to be parsed
# outfilepath: Output file where ostream operators are written
    global global_ops
    global output_filename_h
    global apiname
    global global_str
    try:
        cppHeader = CppHeaderParser.CppHeader(infilepath)
    except CppHeaderParser.CppParseError as e:
        print(e)
        sys.exit(1)
    if rank == 0 or rank == 2:
      mpath = os.path.dirname(outfilepath)
      if mpath == "":
        mpath = os.getcwd()
      apiname = outfilepath.replace(mpath + "/","")
      output_filename_h = open(outfilepath,"w+")
      apiname = apiname.replace("_ostream_ops.h","")
      apiname = apiname.upper()
      output_filename_h.write("// automatically generated\n")
      output_filename_h.write(LICENSE + '\n')
      header_s = \
        '#ifndef INC_' + apiname + '_OSTREAM_OPS_H_\n' + \
        '#define INC_' + apiname + '_OSTREAM_OPS_H_\n' + \
        '#ifdef __cplusplus\n' + \
        '#include <iostream>\n' + \
        '\n' + \
        '#include "roctracer.h"\n'
      header_s += '#include <string>\n'

      output_filename_h.write(header_s)
      output_filename_h.write('\n')
      output_filename_h.write('namespace roctracer {\n')
      output_filename_h.write('namespace ' + apiname.lower() + '_support {\n')
      output_filename_h.write('static int ' + apiname.upper() + '_depth_max = 1;\n')
      output_filename_h.write('static int ' + apiname.upper() + '_depth_max_cnt = 0;\n')
      output_filename_h.write('static std::string ' + apiname.upper() + '_structs_regex = \"\";\n')
      output_filename_h.write('// begin ostream ops for '+ apiname + ' \n')
      output_filename_h.write("// basic ostream ops\n")
      output_filename_h.write(header_basic)
      output_filename_h.write("// End of basic ostream ops\n\n")

    for c in cppHeader.classes:
        if c[-2] == ':' and c[-1] == ':': continue #ostream operator cannot be overloaded for anonymous struct therefore it is skipped
        if "union" in c:
            continue
        if c in structs_analyzed:
            continue
        if c == 'max_align_t' or c == '__fsid_t': # Skipping as it is defined in multiple domains
          continue
        if len(cppHeader.classes[c]["properties"]["public"]) != 0:
          output_filename_h.write("inline static std::ostream& operator<<(std::ostream& out, const " + c + "& v)\n")
          output_filename_h.write("{\n")
          output_filename_h.write("  roctracer::" + apiname.lower() + "_support::operator<<(out, '{');\n")
          output_filename_h.write("  " + apiname.upper() + "_depth_max_cnt++;\n")
          output_filename_h.write("  if (" + apiname.upper() + "_depth_max == -1 || " + apiname.upper() + "_depth_max_cnt <= " + apiname.upper() + "_depth_max" + ") {\n" )
          process_struct(output_filename_h, c, cppHeader, "", apiname)
          global_str = "\n".join(global_str.split("\n")[0:-3])
          if global_str != '': global_str += "\n    }\n"
          output_filename_h.write(global_str)
          output_filename_h.write("  };\n")
          output_filename_h.write("  " + apiname.upper() + "_depth_max_cnt--;\n")
          output_filename_h.write("  roctracer::" + apiname.lower() + "_support::operator<<(out, '}');\n")
          output_filename_h.write("  return out;\n")
          output_filename_h.write("}\n")
          global_str = ''
          global_ops += "inline static std::ostream& operator<<(std::ostream& out, const " + c + "& v)\n" + "{\n" + "  roctracer::" + apiname.lower() + "_support::operator<<(out, v);\n" + "  return out;\n" + "}\n\n"

    if rank == 1 or rank == 2:
      footer = '// end ostream ops for '+ apiname + ' \n'
      footer += '};};\n\n'
      output_filename_h.write(footer)
      output_filename_h.write(global_ops)
      footer = '#endif //__cplusplus\n' + \
               '#endif // INC_' + apiname + '_OSTREAM_OPS_H_\n' + \
               ' \n'
      output_filename_h.write(footer)
      output_filename_h.close()
      print('File ' + outfilepath + ' generated')

    return

parser = argparse.ArgumentParser(description='genOstreamOps.py: generates ostream operators for all typedefs in provided input file.')
requiredNamed = parser.add_argument_group('Required arguments')
requiredNamed.add_argument('-in', metavar='fileList', help='Comma separated list of header files to be parsed', required=True)
requiredNamed.add_argument('-out', metavar='file', help='Output file with ostream operators', required=True)

args = vars(parser.parse_args())

if __name__ == '__main__':
   flist = args['in'].split(',')
   if len(flist) == 1:
     gen_cppheader(flist[0], args['out'],2)
   else:
     for i in range(len(flist)):
       if i == 0:
         gen_cppheader(flist[i], args['out'],0)
       elif i == len(flist)-1:
         gen_cppheader(flist[i], args['out'],1)
       else:
         gen_cppheader(flist[i], args['out'],-1)