#!/usr/bin/python3 -i
#
# Copyright (c) 2018 Valve Corporation
# Copyright (c) 2018 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
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.

import sys
from base_generator import BaseGenerator, BaseGeneratorOptions, write


class VulkanStructDecodersForwardGeneratorOptions(BaseGeneratorOptions):
    """Options for generating C++ function and forward type declarations for Vulkan struct decoding."""

    def __init__(
        self,
        blacklists=None,  # Path to JSON file listing apicalls and structs to ignore.
        platform_types=None,  # Path to JSON file listing platform (WIN32, X11, etc.) defined types.
        filename=None,
        directory='.',
        prefix_text='',
        protect_file=False,
        protect_feature=True,
        extraVulkanHeaders=[]
    ):
        BaseGeneratorOptions.__init__(
            self,
            blacklists,
            platform_types,
            filename,
            directory,
            prefix_text,
            protect_file,
            protect_feature,
            extraVulkanHeaders=extraVulkanHeaders
        )


class VulkanStructDecodersForwardGenerator(BaseGenerator):
    """VulkanStructDecodersForwardGenerator - subclass of BaseGenerator.
    Generates C++ type and function declarations for decoding Vulkan API structures.
    Generate C++ function and forward type declarations for Vulkan struct decoding.
    """

    def __init__(
        self, err_file=sys.stderr, warn_file=sys.stderr, diag_file=sys.stdout
    ):
        BaseGenerator.__init__(
            self,
            process_cmds=False,
            process_structs=True,
            feature_break=True,
            err_file=err_file,
            warn_file=warn_file,
            diag_file=diag_file
        )

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

        write('#include "util/defines.h"', file=self.outFile)
        self.newline()
        self.includeVulkanHeaders(gen_opts)
        self.newline()
        write('#include <cstdint>', file=self.outFile)
        self.newline()
        write('GFXRECON_BEGIN_NAMESPACE(gfxrecon)', file=self.outFile)
        write('GFXRECON_BEGIN_NAMESPACE(decode)', 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
        BaseGenerator.endFile(self)

    def need_feature_generation(self):
        """Indicates that the current feature has C++ code to generate."""
        if self.feature_struct_members:
            return True
        return False

    def generate_feature(self):
        """Performs C++ code generation for the feature."""
        for struct in self.get_filtered_struct_names():
            write('struct Decoded_{};'.format(struct), file=self.outFile)

        self.newline()

        for struct in self.get_filtered_struct_names():
            write(
                'size_t DecodeStruct(const uint8_t* parameter_buffer, size_t buffer_size, Decoded_{}* wrapper);'
                .format(struct),
                file=self.outFile
            )
