#include "renderer.h"
#include "renderer_opengl.h"
#include "renderer_vulkan.h"
#include <cstdint>
#if OS_WINDOWS
#include "renderer_dx11.h"
#endif // OS_WINDOWS
#include "log.h"

namespace spacecal {
namespace renderer {

    static IRenderContext* g_renderContext = nullptr;

    bool isGraphicsApiSupported(GraphicsBackend gfxApi)
    {
        switch (gfxApi) {
        case GraphicsBackend::OpenGL:
            return true;
        case GraphicsBackend::Vulkan:
            return true;
#if OS_WINDOWS
        case GraphicsBackend::DirectX11:
            return true;
#endif
        default:
            return false;
        }
    }

    bool isYFlipped(GraphicsBackend gfxApi)
    {
        switch (gfxApi) {
        case GraphicsBackend::OpenGL:
            return false;
        case GraphicsBackend::Vulkan:
            return true;
#if OS_WINDOWS
        case GraphicsBackend::DirectX11:
            return true;
#endif
        default:
            return false;
        }
    }

    IRenderContext* getRenderContext(GraphicsBackend gfxApi)
    {
        if (g_renderContext) {
            return g_renderContext;
        }

        switch (gfxApi) {
#if OS_WINDOWS
        case spacecal::renderer::GraphicsBackend::DirectX11:
            g_renderContext = new Renderer_DX11();
            break;
#endif // OS_WINDOWS
        case spacecal::renderer::GraphicsBackend::Vulkan:
            g_renderContext = new Renderer_Vulkan();
            break;
        case spacecal::renderer::GraphicsBackend::OpenGL:
            g_renderContext = new Renderer_OpenGL();
            break;
        default:
            LOG_FATAL("Unknown graphics backend {} selected! Defaulting to OpenGL...", (uint32_t)gfxApi);
            g_renderContext = new Renderer_OpenGL();
            break;
        }

        return g_renderContext;
    }

    void shutdownRenderer()
    {
        if (g_renderContext) {
            delete g_renderContext;
        }
    }
}
}