//! Dynamic resampling
//! 
//! This module provides dynamic resampling capabilities that handle sample
//! rate changes gracefully, similar to new approach.

use anyhow::Result;

/// Dynamic resampler that handles rate changes gracefully
pub struct DynamicResampler {
    // TODO: Implement in Phase 3
    _placeholder: (),
}

impl DynamicResampler {
    /// Create a new dynamic resampler
    pub fn new(target_rate: u32) -> Self {
        Self { _placeholder: () }
    }

    /// Handle sample rate changes
    pub fn handle_rate_change(&mut self) {
        // TODO: Implement rate change handling in Phase 3
    }

    /// Resample audio to target rate
    pub fn resample(&mut self, audio: &[f32], from_rate: u32, to_rate: u32) -> Vec<f32> {
        // TODO: Implement dynamic resampling in Phase 3
        // For now, return simple linear interpolation
        if from_rate == to_rate {
            return audio.to_vec();
        }

        let ratio = from_rate as f64 / to_rate as f64;
        let new_len = (audio.len() as f64 / ratio) as usize;
        let mut resampled = Vec::with_capacity(new_len);

        for i in 0..new_len {
            let src_pos = i as f64 * ratio;
            let src_idx = src_pos as usize;
            let fraction = src_pos - src_idx as f64;

            if src_idx + 1 < audio.len() {
                let sample1 = audio[src_idx];
                let sample2 = audio[src_idx + 1];
                let interpolated = sample1 + (sample2 - sample1) * fraction as f32;
                resampled.push(interpolated);
            } else if src_idx < audio.len() {
                resampled.push(audio[src_idx]);
            }
        }

        resampled
    }
}
