// Copyright 2020 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
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <cstdlib>
#include <memory>
#include <utility>

#include "GLFW/glfw3.h"
#include "src/utils/log.h"
#include "src/utils/platform.h"
#include "webgpu/webgpu_glfw.h"

#if DAWN_PLATFORM_IS(WINDOWS)
#define GLFW_EXPOSE_NATIVE_WIN32
#endif
#if defined(DAWN_USE_X11)
#define GLFW_EXPOSE_NATIVE_X11
#endif
// GLFW's native Wayland accessors only exist if GLFW was built with its Wayland
// backend; the GN build isn't (DAWN_GLFW_NO_WAYLAND).
#if defined(DAWN_USE_WAYLAND) && !defined(DAWN_GLFW_NO_WAYLAND)
#define GLFW_EXPOSE_NATIVE_WAYLAND
#endif
#include "GLFW/glfw3native.h"

WGPU_GLFW_EXPORT WGPUSurface wgpuGlfwCreateSurfaceForWindow(const WGPUInstance instance,
                                                            GLFWwindow* window) {
    wgpu::Surface s = wgpu::glfw::CreateSurfaceForWindow(instance, window);
    return s.MoveToCHandle();
}

namespace wgpu::glfw {

wgpu::Surface CreateSurfaceForWindow(const wgpu::Instance& instance, GLFWwindow* window) {
    auto chainedDescriptor = SetupWindowAndGetSurfaceDescriptor(window);

    wgpu::SurfaceDescriptor descriptor;
    descriptor.nextInChain = chainedDescriptor.get();
    wgpu::Surface surface = instance.CreateSurface(&descriptor);

    return surface;
}

// SetupWindowAndGetSurfaceDescriptorCocoa defined in GLFWUtils_metal.mm
std::unique_ptr<wgpu::ChainedStruct, void (*)(wgpu::ChainedStruct*)>
SetupWindowAndGetSurfaceDescriptorCocoa(GLFWwindow* window);

std::unique_ptr<wgpu::ChainedStruct, void (*)(wgpu::ChainedStruct*)>
SetupWindowAndGetSurfaceDescriptor(GLFWwindow* window) {
    if (glfwGetWindowAttrib(window, GLFW_CLIENT_API) != GLFW_NO_API) {
        dawn::ErrorLog() << "GL context was created on the window. Disable context creation by "
                            "setting the GLFW_CLIENT_API hint to GLFW_NO_API.";
        return {nullptr, [](wgpu::ChainedStruct*) {}};
    }
#if DAWN_PLATFORM_IS(WINDOWS)
    wgpu::SurfaceSourceWindowsHWND* desc = new wgpu::SurfaceSourceWindowsHWND();
    desc->hwnd = glfwGetWin32Window(window);
    desc->hinstance = GetModuleHandle(nullptr);
    return {desc, [](wgpu::ChainedStruct* desc) {
                delete reinterpret_cast<wgpu::SurfaceSourceWindowsHWND*>(desc);
            }};
#elif defined(DAWN_ENABLE_BACKEND_METAL)
    return SetupWindowAndGetSurfaceDescriptorCocoa(window);
#elif (defined(DAWN_USE_WAYLAND) && !defined(DAWN_GLFW_NO_WAYLAND)) || defined(DAWN_USE_X11)
#if defined(GLFW_PLATFORM_WAYLAND) && defined(DAWN_USE_WAYLAND) && !defined(DAWN_GLFW_NO_WAYLAND)
    if (glfwGetPlatform() == GLFW_PLATFORM_WAYLAND) {
        wgpu::SurfaceSourceWaylandSurface* desc = new wgpu::SurfaceSourceWaylandSurface();
        desc->display = glfwGetWaylandDisplay();
        desc->surface = glfwGetWaylandWindow(window);
        return {desc, [](wgpu::ChainedStruct* desc) {
                    delete reinterpret_cast<wgpu::SurfaceSourceWaylandSurface*>(desc);
                }};
    } else  // NOLINT(readability/braces)
#endif
#if defined(DAWN_USE_X11)
    {
        wgpu::SurfaceSourceXlibWindow* desc = new wgpu::SurfaceSourceXlibWindow();
        desc->display = glfwGetX11Display();
        desc->window = glfwGetX11Window(window);
        return {desc, [](wgpu::ChainedStruct* desc) {
                    delete reinterpret_cast<wgpu::SurfaceSourceXlibWindow*>(desc);
                }};
    }
#else
    {
        return {nullptr, [](wgpu::ChainedStruct*) {}};
    }
#endif
#else
    return {nullptr, [](wgpu::ChainedStruct*) {}};
#endif
}

}  // namespace wgpu::glfw