//! Modern audio system based on new architecture
//! 
//! This module provides a professional-grade audio processing system that replaces
//! the legacy audio system while maintaining full backward compatibility.

pub mod stream;
pub mod mixer;
pub mod normalizer;
pub mod resampler;
pub mod recorder;
pub mod compatibility;
pub mod sync;
pub mod limiter;

// Re-export main types for easy access
pub use stream::{ModernAudioStream, ModernAudioStreamManager, ProcessedAudio, UnifiedAudioStream};
pub use mixer::{AudioMixer, MixingMode, AudioLevelStats};
pub use normalizer::AudioNormalizer;
pub use resampler::DynamicResampler;
pub use recorder::ModernRecorder;
pub use compatibility::{LegacyBridge, AudioMode, AudioQualityMetrics};
pub use sync::{AudioSynchronizer, SynchronizedChunk};
pub use limiter::TruePeakLimiter;

use anyhow::Result;
use std::sync::Arc;

/// Modern audio system configuration
#[derive(Debug, Clone)]
pub struct AudioConfig {
    /// Target sample rate for processing
    pub target_sample_rate: u32,
    /// EBU R128 normalization target in LUFS
    pub normalization_target_lufs: f64,
    /// Sync tolerance in milliseconds
    pub sync_tolerance_ms: u32,
    /// Enable true peak limiting
    pub enable_true_peak_limiting: bool,
    /// Mixing mode for mic and system audio
    pub mixing_mode: MixingMode,
}

/// Audio mixing modes
#[derive(Debug, Clone)]
pub enum MixingMode {
    /// Fixed ratio mixing (legacy behavior)
    Fixed { mic_ratio: f32, system_ratio: f32 },
    /// Dynamic mixing based on audio levels
    Dynamic,
    /// Professional ducking and crossfading
    Professional,
}

impl Default for AudioConfig {
    fn default() -> Self {
        Self {
            target_sample_rate: 48000,
            normalization_target_lufs: -23.0, // EBU R128 standard for speech
            sync_tolerance_ms: 1, // 1ms tolerance for perfect sync
            enable_true_peak_limiting: true,
            mixing_mode: MixingMode::Professional,
        }
    }
}

/// Main entry point for the modern audio system
pub struct ModernAudioSystem {
    config: AudioConfig,
    stream: Option<AudioStream>,
    recorder: Option<ModernRecorder>,
}

impl ModernAudioSystem {
    /// Create a new modern audio system with default configuration
    pub fn new() -> Self {
        Self {
            config: AudioConfig::default(),
            stream: None,
            recorder: None,
        }
    }

    /// Create a new modern audio system with custom configuration
    pub fn with_config(config: AudioConfig) -> Self {
        Self {
            config,
            stream: None,
            recorder: None,
        }
    }

    /// Initialize the audio system
    pub async fn initialize(&mut self) -> Result<()> {
        // TODO: Implement initialization
        // This will be implemented in Phase 2
        Ok(())
    }

    /// Start recording with the modern system
    pub async fn start_recording(&mut self) -> Result<()> {
        // TODO: Implement recording start
        // This will be implemented in Phase 2
        Ok(())
    }

    /// Stop recording and return the file path
    pub async fn stop_recording(&mut self) -> Result<Option<String>> {
        // TODO: Implement recording stop
        // This will be implemented in Phase 2
        Ok(None)
    }

    /// Get current configuration
    pub fn config(&self) -> &AudioConfig {
        &self.config
    }

    /// Update configuration
    pub fn update_config(&mut self, config: AudioConfig) {
        self.config = config;
    }
}

impl Default for ModernAudioSystem {
    fn default() -> Self {
        Self::new()
    }
}
