mathhook-core 0.2.0

//! WebGPU Compute Implementation
//!
//! This module provides WebGPU-based GPU acceleration for mathematical operations.
//! Currently a placeholder - full implementation planned for version 0.2.

/// WebGPU compute context for mathematical operations
pub struct WebGpuCompute {
    _private: (),
}

impl WebGpuCompute {
    /// Create a new WebGPU compute context
    ///
    /// Currently returns an error as WebGPU support is not yet implemented.
    /// Full implementation planned for version 0.2.
    pub async fn new() -> Result<Self, WebGpuError> {
        Err(WebGpuError::NotImplemented(
            "WebGPU support planned for version 0.2".to_string(),
        ))
    }

    /// Perform GPU bulk addition
    ///
    /// Currently returns an error as WebGPU support is not yet implemented.
    pub async fn bulk_add(&self, _values: &[f64]) -> Result<f64, WebGpuError> {
        Err(WebGpuError::NotImplemented(
            "WebGPU bulk operations planned for version 0.2".to_string(),
        ))
    }

    /// Perform GPU matrix multiplication
    ///
    /// Currently returns an error as WebGPU support is not yet implemented.
    pub async fn matrix_multiply(
        &self,
        _a: &[Vec<f64>],
        _b: &[Vec<f64>],
    ) -> Result<Vec<Vec<f64>>, WebGpuError> {
        Err(WebGpuError::NotImplemented(
            "WebGPU matrix operations planned for version 0.2".to_string(),
        ))
    }
}

/// WebGPU-specific errors
#[derive(Debug, Clone)]
pub enum WebGpuError {
    /// No WebGPU adapter found
    NoAdapter,
    /// Device request failed
    DeviceRequest(String),
    /// Shader compilation failed
    ShaderCompilation(String),
    /// Buffer mapping failed
    BufferMap(String),
    /// Invalid matrix dimensions
    InvalidDimensions,
    /// Compute error
    ComputeError(String),
    /// Feature not yet implemented
    NotImplemented(String),
}

impl std::fmt::Display for WebGpuError {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            WebGpuError::NoAdapter => write!(f, "No WebGPU adapter found"),
            WebGpuError::DeviceRequest(msg) => write!(f, "Device request failed: {}", msg),
            WebGpuError::ShaderCompilation(msg) => write!(f, "Shader compilation failed: {}", msg),
            WebGpuError::BufferMap(msg) => write!(f, "Buffer mapping failed: {}", msg),
            WebGpuError::InvalidDimensions => write!(f, "Invalid matrix dimensions"),
            WebGpuError::ComputeError(msg) => write!(f, "Compute error: {}", msg),
            WebGpuError::NotImplemented(msg) => write!(f, "Not implemented: {}", msg),
        }
    }
}

impl std::error::Error for WebGpuError {}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_webgpu_error_display() {
        let err = WebGpuError::NoAdapter;
        assert_eq!(err.to_string(), "No WebGPU adapter found");

        let err = WebGpuError::NotImplemented("test".to_string());
        assert_eq!(err.to_string(), "Not implemented: test");
    }
}