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use core_foundation::{
    base::{kCFAllocatorDefault, CFAllocatorRef, CFType, CFTypeID, TCFType},
    dictionary::{CFDictionary, CFDictionaryRef},
    string::{CFString, CFStringRef},
};
use libc::c_void;

use crate::{
    base::CVOptionFlags,
    image_buffer::{CVImageBuffer, CVImageBufferRef},
    opengl_texture::{CVOpenGLTexture, CVOpenGLTextureRef},
    return_::{kCVReturnSuccess, CVReturn},
    CGLContextObj, CGLPixelFormatObj,
};

#[repr(C)]
pub struct __CVOpenGLTextureCache(c_void);

pub type CVOpenGLTextureCacheRef = *mut __CVOpenGLTextureCache;

extern "C" {
    pub static kCVOpenGLTextureCacheChromaSamplingModeKey: CFStringRef;
    pub static kCVOpenGLTextureCacheChromaSamplingModeAutomatic: CFStringRef;
    pub static kCVOpenGLTextureCacheChromaSamplingModeHighestQuality: CFStringRef;
    pub static kCVOpenGLTextureCacheChromaSamplingModeBestPerformance: CFStringRef;

    pub fn CVOpenGLTextureCacheGetTypeID() -> CFTypeID;
    pub fn CVOpenGLTextureCacheRetain(textureCache: CVOpenGLTextureCacheRef) -> CVOpenGLTextureCacheRef;
    pub fn CVOpenGLTextureCacheRelease(textureCache: CVOpenGLTextureCacheRef);
    pub fn CVOpenGLTextureCacheCreate(
        allocator: CFAllocatorRef,
        cacheAttributes: CFDictionaryRef,
        cglContext: CGLContextObj,
        cglPixelFormat: CGLPixelFormatObj,
        textureAttributes: CFDictionaryRef,
        cacheOut: *mut CVOpenGLTextureCacheRef,
    ) -> CVReturn;
    pub fn CVOpenGLTextureCacheCreateTextureFromImage(
        allocator: CFAllocatorRef,
        textureCache: CVOpenGLTextureCacheRef,
        sourceImage: CVImageBufferRef,
        attributes: CFDictionaryRef,
        textureOut: *mut CVOpenGLTextureRef,
    ) -> CVReturn;
    pub fn CVOpenGLTextureCacheFlush(textureCache: CVOpenGLTextureCacheRef, options: CVOptionFlags);
}

pub struct CVOpenGLTextureCache(CVOpenGLTextureCacheRef);

impl Drop for CVOpenGLTextureCache {
    fn drop(&mut self) {
        unsafe { CVOpenGLTextureCacheRelease(self.0) }
    }
}

impl_TCFType!(CVOpenGLTextureCache, CVOpenGLTextureCacheRef, CVOpenGLTextureCacheGetTypeID);
impl_CFTypeDescription!(CVOpenGLTextureCache);

impl CVOpenGLTextureCache {
    pub fn new(
        cache_attributes: &CFDictionary<CFString, CFString>,
        cgl_context: CGLContextObj,
        cgl_pixel_format: CGLPixelFormatObj,
        texture_attributes: &CFDictionary<CFString, CFType>,
    ) -> Result<CVOpenGLTextureCache, CVReturn> {
        let mut cache: CVOpenGLTextureCacheRef = std::ptr::null_mut();
        let status = unsafe {
            CVOpenGLTextureCacheCreate(
                kCFAllocatorDefault,
                cache_attributes.as_concrete_TypeRef(),
                cgl_context,
                cgl_pixel_format,
                texture_attributes.as_concrete_TypeRef(),
                &mut cache,
            )
        };
        if status == kCVReturnSuccess {
            Ok(unsafe { TCFType::wrap_under_create_rule(cache) })
        } else {
            Err(status)
        }
    }

    pub fn create_texture_from_image(
        &self,
        source_image: CVImageBuffer,
        attributes: &CFDictionary<CFString, CFType>,
    ) -> Result<CVOpenGLTexture, CVReturn> {
        let mut texture: CVOpenGLTextureRef = std::ptr::null_mut();
        let status = unsafe {
            CVOpenGLTextureCacheCreateTextureFromImage(
                kCFAllocatorDefault,
                self.as_concrete_TypeRef(),
                source_image.as_concrete_TypeRef(),
                attributes.as_concrete_TypeRef(),
                &mut texture,
            )
        };
        if status == kCVReturnSuccess {
            Ok(unsafe { TCFType::wrap_under_create_rule(texture) })
        } else {
            Err(status)
        }
    }

    pub fn flush(&self, options: CVOptionFlags) {
        unsafe { CVOpenGLTextureCacheFlush(self.as_concrete_TypeRef(), options) }
    }
}