// Copyright 2021 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
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// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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//    this list of conditions and the following disclaimer in the documentation
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#include "dawn/native/SpirvValidation.h"

#include <spirv-tools/libspirv.hpp>

#include <sstream>
#include <string>

#include "dawn/native/Device.h"

namespace dawn::native {

MaybeError ValidateSpirv(DeviceBase* device,
                         const uint32_t* spirv,
                         size_t wordCount,
                         bool dumpSpirv) {
    spvtools::SpirvTools spirvTools(SPV_ENV_VULKAN_1_1);
    spirvTools.SetMessageConsumer([device](spv_message_level_t level, const char*,
                                           const spv_position_t& position, const char* message) {
        WGPULoggingType wgpuLogLevel;
        switch (level) {
            case SPV_MSG_FATAL:
            case SPV_MSG_INTERNAL_ERROR:
            case SPV_MSG_ERROR:
                wgpuLogLevel = WGPULoggingType_Error;
                break;
            case SPV_MSG_WARNING:
                wgpuLogLevel = WGPULoggingType_Warning;
                break;
            case SPV_MSG_INFO:
                wgpuLogLevel = WGPULoggingType_Info;
                break;
            default:
                wgpuLogLevel = WGPULoggingType_Error;
                break;
        }

        std::ostringstream ss;
        ss << "SPIRV line " << position.index << ": " << message << "\n";
        device->EmitLog(wgpuLogLevel, ss.str().c_str());
    });

    // Don't prepare to emit friendly names. The preparation costs
    // time by scanning the whole module and building a string table.
    spvtools::ValidatorOptions val_opts;
    val_opts.SetFriendlyNames(false);

    const bool valid = spirvTools.Validate(spirv, wordCount, val_opts);
    if (dumpSpirv || !valid) {
        std::ostringstream dumpedMsg;
        std::string disassembly;
        if (spirvTools.Disassemble(
                spirv, wordCount, &disassembly,
                SPV_BINARY_TO_TEXT_OPTION_FRIENDLY_NAMES | SPV_BINARY_TO_TEXT_OPTION_INDENT)) {
            dumpedMsg << "/* Dumped generated SPIRV disassembly */\n" << disassembly;
        } else {
            dumpedMsg << "/* Failed to disassemble generated SPIRV */";
        }
        device->EmitLog(WGPULoggingType_Info, dumpedMsg.str().c_str());
    }

    DAWN_INVALID_IF(!valid, "Produced invalid SPIRV. Please file a bug at https://crbug.com/tint.");

    return {};
}

}  // namespace dawn::native