#!/usr/bin/env python3
#
# Copyright (c) 2021 LunarG, Inc.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# IN THE SOFTWARE.

import sys
from dx12_base_generator import Dx12BaseGenerator, write
from dx12_base_struct_decoders_header_generator import Dx12BaseStructDecodersHeaderGenerator


class Dx12DecoderHeaderGenerator(
    Dx12BaseGenerator, Dx12BaseStructDecodersHeaderGenerator
):
    """Generates C++ functions responsible for decoding Dx12 API calls."""

    def __init__(
        self,
        source_dict,
        dx12_prefix_strings,
        err_file=sys.stderr,
        warn_file=sys.stderr,
        diag_file=sys.stdout
    ):
        Dx12BaseGenerator.__init__(
            self, source_dict, dx12_prefix_strings, err_file, warn_file,
            diag_file
        )

    def beginFile(self, gen_opts):
        """Method override."""
        Dx12BaseGenerator.beginFile(self, gen_opts)

        self.write_include()
        write('GFXRECON_BEGIN_NAMESPACE(gfxrecon)', file=self.outFile)
        write('GFXRECON_BEGIN_NAMESPACE(decode)', file=self.outFile)
        self.newline()

    def generate_feature(self):
        """Method override."""
        Dx12BaseGenerator.generate_feature(self)
        self.write_dx12_decoder_class()

    def write_include(self):
        """Method override."""
        code = ("\n" "#include \"decode/dx12_decoder_base.h\"\n" "\n")
        write(code, file=self.outFile)

    def get_decoder_method_body(self, params):
        return ';'

    def get_decode_function_call_body(self):
        return ';'

    def get_decode_method_call_body(self):
        return ';'

    def get_decoder_function(
        self, class_name, method_info, indent, function_class
    ):
        object_param = ''
        if class_name:
            class_name = '_' + class_name
            object_param = 'format::HandleId object_id, '

        return (
            '{}size_t {}Decode{}_{}({}const ApiCallInfo& call_info, const uint8_t* parameter_buffer, size_t buffer_size){}\n'
            .format(
                indent, function_class, class_name, method_info['name'],
                object_param,
                self.get_decoder_method_body(method_info['parameters'])
            )
        )

    def get_decoder_class_define(self):
        declaration = (
            "class Dx12Decoder : public Dx12DecoderBase\n"
            "{{\n"
            "  public:\n"
            "    Dx12Decoder(){{}}\n"
            "    virtual ~Dx12Decoder() override {{}}\n"
            "\n"
            "    virtual void DecodeFunctionCall(format::ApiCallId  call_id,\n"
            "                                    const ApiCallInfo& call_options,\n"
            "                                    const uint8_t*     parameter_buffer,\n"
            "                                    size_t             buffer_size) override{}\n"
            "\n"
            "    virtual void DecodeMethodCall(format::ApiCallId  call_id,\n"
            "                                  format::HandleId   object_id,\n"
            "                                  const ApiCallInfo& call_options,\n"
            "                                  const uint8_t*     parameter_buffer,\n"
            "                                  size_t             buffer_size) override{}\n"
            "  private:\n".format(
                self.get_decode_function_call_body(),
                self.get_decode_method_call_body()
            )
        )

        indent = '    '
        function_class = ''
        class_end = '};\n'
        return (declaration, indent, function_class, class_end)

    def write_dx12_decoder_class(self):
        declaration, indent, function_class, class_end = self.get_decoder_class_define(
        )
        code = declaration

        header_dict = self.source_dict['header_dict']
        for k, v in header_dict.items():
            code_length = len(code)

            for m in v.functions:
                if self.is_required_function_data(m) and (
                    not self.is_cmd_black_listed(m['name'])
                ):
                    code += self.get_decoder_function(
                        '', m, indent, function_class
                    )

            for class_name, class_value in v.classes.items():
                if self.is_required_class_data(class_value):
                    for m in class_value['methods']['public']:
                        if not self.is_method_black_listed(
                            class_name, m['name']
                        ):
                            code += self.get_decoder_function(
                                class_name, m, indent, function_class
                            )

            code_length2 = len(code)
            if code_length2 > code_length:
                code = (
                    code[:code_length] + '\n'
                    + self.dx12_prefix_strings.format(k) + '\n'
                    + code[code_length:]
                )

        code += class_end
        write(code, file=self.outFile)

    def endFile(self):
        """Method override."""
        self.newline()
        write('GFXRECON_END_NAMESPACE(decode)', file=self.outFile)
        write('GFXRECON_END_NAMESPACE(gfxrecon)', file=self.outFile)

        # Finish processing in superclass
        Dx12BaseGenerator.endFile(self)
