// Copyright 2019 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.
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// 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.
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//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
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#ifndef SRC_DAWN_NATIVE_ERRORSCOPE_H_
#define SRC_DAWN_NATIVE_ERRORSCOPE_H_

#include <string>
#include <vector>

#include "dawn/native/dawn_platform.h"

namespace dawn::native {

class ErrorScope {
  public:
    wgpu::ErrorType GetErrorType() const;
    const std::string& GetErrorMessage() const;

  private:
    friend class ErrorScopeStack;
    explicit ErrorScope(wgpu::ErrorFilter errorFilter);

    wgpu::ErrorType mMatchedErrorType;
    wgpu::ErrorType mCapturedError = wgpu::ErrorType::NoError;
    std::string mErrorMessage = "";
};

class ErrorScopeStack {
  public:
    ErrorScopeStack();
    ~ErrorScopeStack();

    void Push(wgpu::ErrorFilter errorFilter);
    ErrorScope Pop();

    bool Empty() const;

    // Pass an error to the scopes in the stack. Returns true if one of the scopes
    // captured the error. Returns false if the error should be forwarded to the
    // uncaptured error callback.
    bool HandleError(wgpu::ErrorType type, const char* message);

  private:
    std::vector<ErrorScope> mScopes;
};

}  // namespace dawn::native

#endif  // SRC_DAWN_NATIVE_ERRORSCOPE_H_
