// Copyright 2017 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#ifndef SRC_DAWN_UTILS_TERRIBLECOMMANDBUFFER_H_
#define SRC_DAWN_UTILS_TERRIBLECOMMANDBUFFER_H_

#include <span>

#include "dawn/wire/Wire.h"
#include "partition_alloc/pointers/raw_ptr.h"

namespace dawn::utils {

class TerribleCommandBuffer : public dawn::wire::CommandSerializer {
  public:
    TerribleCommandBuffer();
    explicit TerribleCommandBuffer(dawn::wire::CommandHandler* handler);

    void SetHandler(dawn::wire::CommandHandler* handler);

    size_t GetMaximumAllocationSize() const override;

    void* GetCmdSpace(size_t size) override;
    bool Flush() override;
    bool Empty();

    // The following APIs should only be used for testing purposes.
    size_t GetOffsetForTesting() const;
    void SetOffsetForTesting(size_t offset);
    std::span<const char> GetContentSubrange(size_t startOffset, size_t endOffset);

  private:
    raw_ptr<dawn::wire::CommandHandler> mHandler = nullptr;

    size_t mOffset = 0;
    size_t mLastFlushedOffset = 0;
    char mBuffer[1000000];
};

}  // namespace dawn::utils

#endif  // SRC_DAWN_UTILS_TERRIBLECOMMANDBUFFER_H_
