#include "Texture.h"
#include "Profiling.h"
#include "Renderer.h"

#ifdef __APPLE__
#include "../m/MetalGfxInterface.h"
#endif

#if defined(__ANDROID__) || defined(_WIN32)
Texture::Texture() : m_texture(0) {}

Texture::Texture(unsigned int width, unsigned int height, const void* data) : m_texture(0)
{
    ZoneScoped;

    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glGenTextures(1, &m_texture);
    glBindTexture(GL_TEXTURE_2D, m_texture);
    glTexImage2D(GL_TEXTURE_2D,
                 0,
                 GL_RGBA,
                 static_cast<GLsizei>(width),
                 static_cast<GLsizei>(height),
                 0,
                 GL_RGBA,
                 GL_UNSIGNED_BYTE,
                 data);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glGenerateMipmap(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, 0);
    width_px = width;
    height_px = height;
}

Texture::Texture(unsigned int width, unsigned int height, const void* data, GLint format) : m_texture(0)
{
    ZoneScoped;

    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glGenTextures(1, &m_texture);
    glBindTexture(GL_TEXTURE_2D, m_texture);
    glTexImage2D(GL_TEXTURE_2D,
                 0,
                 GL_R8,
                 static_cast<GLsizei>(width),
                 static_cast<GLsizei>(height),
                 0,
                 GL_RED,
                 GL_UNSIGNED_BYTE,
                 data);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glGenerateMipmap(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, 0);
    width_px = width;
    height_px = height;
}

void Texture::destroy()
{
    ZoneScoped;
    glDeleteTextures(1, &m_texture);
}

void Texture::bind() const
{
    ZoneScoped;
    glBindTexture(GL_TEXTURE_2D, m_texture);
}

#else

Texture::Texture() : m_texture(nullptr) {}

Texture::Texture(unsigned int width, unsigned int height, const void* data)
    : width_px(width), height_px(height)
{
    m_texture = metalGfxCreateTexture(Renderer::ptr->getGfx(), data, width, height, MetalGfxTextureFormat_RGBA);
}

Texture::Texture(unsigned int width, unsigned int height, const void* data, int dummy)
    : width_px(width), height_px(height)
{
    m_texture = metalGfxCreateTexture(Renderer::ptr->getGfx(), data, width, height, MetalGfxTextureFormat_Red);
}

void Texture::destroy()
{
    metalGfxDestroyTexture(m_texture);
    m_texture = nullptr;
}

void Texture::bind() const
{
    /* This is a no-op under metal? */
}

#endif

void Texture::getTextureSize(unsigned int* w, unsigned int* h)
{
    ZoneScoped;
    if (w != nullptr) {
        *w = width_px;
    }
    if (h != nullptr) {
        *h = height_px;
    }
}