// use crate::utils::{Arena, FileLoc, TextureParameterDictionary};
use crate::core::texture::{FloatTextureTrait, SpectrumTextureTrait};
use crate::spectra::get_colorspace_context;
use shared::core::spectrum::SpectrumTrait;
// use ptex::Cache;
// use ptex_filter::{PtexFilter, PtexFilterOptions, PtexFilterType};

use shared::Float;
use shared::core::color::{ColorEncoding, RGB};
use shared::core::texture::{SpectrumType, TextureEvalContext};
use shared::spectra::{RGBIlluminantSpectrum, SampledSpectrum, SampledWavelengths};

#[derive(Debug, Clone)]
pub struct PtexTextureBase {
    pub valid: bool,
    pub filename: String,
    pub encoding: ColorEncoding,
    pub scale: Float,
}

impl PtexTextureBase {
    pub fn new(filename: String, encoding: ColorEncoding, scale: Float) -> Self {
        log::warn!(
            "Ptex support is currently disabled. Texture '{}' will render as Magenta.",
            filename
        );

        Self {
            filename,
            encoding,
            scale,
            valid: false,
        }
    }

    pub fn sample_texture(&self, _ctx: &TextureEvalContext) -> Option<RGB> {
        Some(RGB::new(1.0, 0.0, 1.0) * self.scale)
    }
}

#[derive(Debug, Clone)]
pub struct FloatPtexTexture {
    pub base: PtexTextureBase,
}

impl FloatTextureTrait for FloatPtexTexture {
    fn evaluate(&self, ctx: &TextureEvalContext) -> Float {
        if let Some(rgb) = self.base.sample_texture(ctx) {
            rgb.g
        } else {
            0.0
        }
    }
}

#[derive(Clone, Debug)]
pub struct SpectrumPtexTexture {
    pub base: PtexTextureBase,
    pub spectrum_type: SpectrumType,
}

impl SpectrumTextureTrait for SpectrumPtexTexture {
    fn evaluate(&self, ctx: &TextureEvalContext, lambda: &SampledWavelengths) -> SampledSpectrum {
        if let Some(rgb) = self.base.sample_texture(ctx) {
            let stdcs = get_colorspace_context();
            let srgb = stdcs.srgb.as_ref();
            RGBIlluminantSpectrum::new(srgb, rgb).sample(lambda)
        } else {
            SampledSpectrum::new(0.0)
        }
    }
}

pub trait CreateGPUPtexTexture {}