//! # rtx-neuro-signal
//!
//! Signal processing for MEG/EEG neuroimaging data.
//!
//! ## Features
//!
//! - **Filtering**: Bandpass, highpass, lowpass, notch filters
//! - **Artifact Removal**: SSP, ICA
//! - **Resampling**: Up/downsampling with anti-aliasing
//! - **Baseline Correction**: Mean, median, zscore normalization
//! - **Time-Frequency**: Morlet wavelets, STFT, PSD

#![warn(missing_docs)]

pub mod baseline;
pub mod filter;
pub mod ica;
pub mod resample;
pub mod ssp;
pub mod tfr;

// Re-export main types
pub use baseline::{BaselineMethod, baseline_correct};
pub use filter::{FilterMethod, bandpass, highpass, lowpass, notch};
pub use ica::{Ica, IcaMethod};
pub use ssp::SspProjector;
pub use tfr::{
    CycleSpec, PsdResult, StftResult, TfrOutput, TfrResult, Window, psd_multitaper, psd_welch,
    stft, tfr_morlet, tfr_morlet_adaptive,
};

/// Signal processing error types
#[derive(Debug, thiserror::Error)]
pub enum SignalError {
    /// Invalid filter parameters
    #[error("Invalid filter parameters: {0}")]
    InvalidParameters(String),

    /// Data length error
    #[error("Invalid data length: {0}")]
    InvalidLength(String),

    /// Numerical error
    #[error("Numerical error: {0}")]
    Numerical(String),
}

/// Result type for signal processing operations
pub type SignalResult<T> = Result<T, SignalError>;