// Copyright 2019 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef DAWNNATIVE_ERRORSCOPE_H_
#define DAWNNATIVE_ERRORSCOPE_H_

#include "dawn_native/dawn_platform.h"

#include <string>
#include <vector>

namespace dawn_native {

    class ErrorScope {
      public:
        wgpu::ErrorType GetErrorType() const;
        const char* 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:
        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  // DAWNNATIVE_ERRORSCOPE_H_