voirs-spatial 0.1.0-rc.1

//! Oculus/Meta Platform Integration
//!
//! This module provides integration with Oculus/Meta VR headsets through
//! various APIs and runtime systems.

use crate::platforms::{
    DeviceInfo, EyeTrackingData, HandTrackingData, PlatformCapabilities, PlatformIntegration,
    PlatformTrackingData, PoseData, TrackingConfig, TrackingQuality, TrackingState,
};
use crate::position::{PlatformData, PlatformType};
use crate::types::Position3D;
use crate::{Error, Result};
use async_trait::async_trait;
use std::collections::HashMap;
use tokio::time::Instant;

/// Oculus/Meta platform integration
pub struct OculusPlatform {
    device_info: DeviceInfo,
    capabilities: PlatformCapabilities,
    tracking_active: bool,
    config: TrackingConfig,

    // Simulated device state (in real implementation, this would connect to Oculus Runtime)
    simulated_head_pose: PoseData,
    simulated_left_controller: Option<PoseData>,
    simulated_right_controller: Option<PoseData>,
    last_update: Option<Instant>,
}

impl OculusPlatform {
    /// Create new Oculus platform integration
    pub fn new() -> Self {
        Self {
            device_info: DeviceInfo {
                name: "Oculus Device".to_string(),
                manufacturer: "Meta".to_string(),
                model: "Unknown".to_string(),
                serial_number: "Unknown".to_string(),
                firmware_version: "Unknown".to_string(),
                platform_version: "Unknown".to_string(),
            },
            capabilities: PlatformCapabilities {
                head_tracking_6dof: true,
                hand_tracking: true,
                eye_tracking: false, // Most Oculus devices don't have eye tracking yet
                controller_tracking: true,
                room_scale: true,
                passthrough: true, // Many newer Oculus devices support passthrough
                refresh_rates: vec![72.0, 80.0, 90.0, 120.0],
                tracking_range: 10.0,
            },
            tracking_active: false,
            config: TrackingConfig::default(),
            simulated_head_pose: PoseData::new(
                Position3D::new(0.0, 1.7, 0.0),
                (0.0, 0.0, 0.0, 1.0),
            ),
            simulated_left_controller: Some(PoseData::new(
                Position3D::new(-0.3, 1.3, -0.3),
                (0.0, 0.0, 0.0, 1.0),
            )),
            simulated_right_controller: Some(PoseData::new(
                Position3D::new(0.3, 1.3, -0.3),
                (0.0, 0.0, 0.0, 1.0),
            )),
            last_update: None,
        }
    }

    /// Initialize Oculus Runtime (simulated for now)
    async fn init_oculus_runtime(&mut self) -> Result<()> {
        // In a real implementation, this would:
        // 1. Load the Oculus Runtime DLL/shared library
        // 2. Initialize the VR session
        // 3. Query device capabilities
        // 4. Set up tracking systems

        tracing::info!("Initializing Oculus runtime (simulated)");

        // Simulate device detection
        self.detect_device_info().await?;

        // Simulate runtime initialization success
        self.last_update = Some(Instant::now());

        Ok(())
    }

    /// Detect and update device information
    async fn detect_device_info(&mut self) -> Result<()> {
        // In a real implementation, this would query the Oculus Runtime
        // For now, simulate different device types based on availability

        if self.is_quest_device().await {
            self.device_info.model = "Quest 2/3".to_string();
            self.capabilities.passthrough = true;
            self.capabilities.hand_tracking = true;
            self.capabilities.refresh_rates = vec![72.0, 90.0, 120.0];
        } else if self.is_rift_device().await {
            self.device_info.model = "Rift S".to_string();
            self.capabilities.passthrough = false;
            self.capabilities.hand_tracking = false;
            self.capabilities.refresh_rates = vec![80.0];
        } else {
            self.device_info.model = "Generic Oculus Device".to_string();
        }

        tracing::info!("Detected Oculus device: {}", self.device_info.model);
        Ok(())
    }

    /// Check if this is a Quest-type device (simulated)
    async fn is_quest_device(&self) -> bool {
        // In real implementation, would check device properties
        // For simulation, randomly return true 70% of the time
        use scirs2_core::random::Rng;
        let mut rng = scirs2_core::random::thread_rng();
        rng.random_bool(0.7)
    }

    /// Check if this is a Rift-type device (simulated)
    async fn is_rift_device(&self) -> bool {
        // In real implementation, would check device properties
        !self.is_quest_device().await
    }

    /// Update simulated head pose with basic motion
    fn update_simulated_pose(&mut self) {
        if let Some(last_update) = self.last_update {
            let now = Instant::now();
            let dt = now.duration_since(last_update).as_secs_f32();

            // Simulate small head movements
            let time = now.elapsed().as_secs_f32();
            let position = Position3D::new(
                (time * 0.1).sin() * 0.05,        // Small side-to-side motion
                1.7 + (time * 0.15).sin() * 0.02, // Small up-down motion
                (time * 0.08).cos() * 0.03,       // Small forward-back motion
            );

            // Simulate head rotation
            let yaw = (time * 0.05).sin() * 0.1;
            let pitch = (time * 0.07).cos() * 0.05;

            // Convert to quaternion (simplified)
            let half_yaw = yaw * 0.5;
            let half_pitch = pitch * 0.5;
            let cos_yaw = half_yaw.cos();
            let sin_yaw = half_yaw.sin();
            let cos_pitch = half_pitch.cos();
            let sin_pitch = half_pitch.sin();

            let orientation = (
                sin_pitch * cos_yaw,
                cos_pitch * sin_yaw,
                -sin_pitch * sin_yaw,
                cos_pitch * cos_yaw,
            );

            self.simulated_head_pose = PoseData {
                position,
                orientation,
                linear_velocity: Position3D::new(0.0, 0.0, 0.0),
                angular_velocity: Position3D::new(0.0, yaw, pitch),
                confidence: 0.95,
            };

            self.last_update = Some(now);
        }
    }
}

#[async_trait]
impl PlatformIntegration for OculusPlatform {
    async fn initialize(&mut self) -> Result<()> {
        self.init_oculus_runtime().await
    }

    async fn get_tracking_data(&self) -> Result<PlatformTrackingData> {
        if !self.tracking_active {
            return Err(Error::LegacyProcessing("Tracking not active".to_string()));
        }

        // In a real implementation, this would get actual tracking data from Oculus Runtime
        // For now, provide simulated controller poses if controllers are supported
        let left_controller = if self.capabilities.controller_tracking {
            self.simulated_left_controller.clone()
        } else {
            None
        };

        let right_controller = if self.capabilities.controller_tracking {
            self.simulated_right_controller.clone()
        } else {
            None
        };

        Ok(PlatformTrackingData {
            head_pose: self.simulated_head_pose.clone(),
            left_controller,
            right_controller,
            quality: TrackingQuality {
                overall_quality: 0.95,
                position_quality: 0.95,
                orientation_quality: 0.98,
                feature_count: 100,
                state: TrackingState::Full,
            },
            timestamp: Instant::now(),
            raw_data: PlatformData {
                device_id: "Oculus".to_string(),
                pose_data: vec![],
                tracking_confidence: 0.95,
                platform_timestamp: 0,
                properties: HashMap::new(),
            },
        })
    }

    async fn is_available(&self) -> bool {
        // In a real implementation, this would check if Oculus Runtime is installed and running
        // For simulation purposes, return true if we've been initialized
        self.last_update.is_some()
    }

    fn get_capabilities(&self) -> PlatformCapabilities {
        self.capabilities.clone()
    }

    async fn configure_tracking(&mut self, config: TrackingConfig) -> Result<()> {
        self.config = config;
        tracing::info!("Configured Oculus tracking with config: {:?}", self.config);
        Ok(())
    }

    fn get_device_info(&self) -> DeviceInfo {
        self.device_info.clone()
    }

    async fn start_tracking(&mut self) -> Result<()> {
        if self.last_update.is_none() {
            return Err(Error::LegacyProcessing(
                "Oculus runtime not initialized".to_string(),
            ));
        }

        self.tracking_active = true;
        self.last_update = Some(Instant::now());
        tracing::info!("Started Oculus tracking");
        Ok(())
    }

    async fn stop_tracking(&mut self) -> Result<()> {
        self.tracking_active = false;
        tracing::info!("Stopped Oculus tracking");
        Ok(())
    }

    async fn get_hand_tracking(&self) -> Result<Option<HandTrackingData>> {
        if !self.config.enable_hand_tracking || !self.capabilities.hand_tracking {
            return Ok(None);
        }

        // In a real implementation, this would get hand tracking data from Oculus SDK
        // For now, return None as we don't have actual implementation
        Ok(None)
    }

    async fn get_eye_tracking(&self) -> Result<Option<EyeTrackingData>> {
        if !self.config.enable_eye_tracking || !self.capabilities.eye_tracking {
            return Ok(None);
        }

        // Most Oculus devices don't have eye tracking yet
        Ok(None)
    }
}

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

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

    #[tokio::test]
    async fn test_oculus_platform_creation() {
        let platform = OculusPlatform::new();
        assert!(!platform.tracking_active);
        assert_eq!(platform.device_info.manufacturer, "Meta");
    }

    #[tokio::test]
    async fn test_oculus_initialization() {
        let mut platform = OculusPlatform::new();
        assert!(platform.initialize().await.is_ok());
        assert!(platform.is_available().await);
    }

    #[tokio::test]
    async fn test_oculus_tracking() {
        let mut platform = OculusPlatform::new();
        assert!(platform.initialize().await.is_ok());
        assert!(platform.start_tracking().await.is_ok());

        let tracking_data = platform.get_tracking_data().await;
        assert!(tracking_data.is_ok());

        let data = tracking_data.unwrap();
        assert_eq!(data.quality.state, TrackingState::Full);
        assert!(data.quality.overall_quality > 0.9);
    }

    #[tokio::test]
    async fn test_oculus_capabilities() {
        let platform = OculusPlatform::new();
        let capabilities = platform.get_capabilities();

        assert!(capabilities.head_tracking_6dof);
        assert!(capabilities.controller_tracking);
        assert!(capabilities.room_scale);
        assert!(capabilities.refresh_rates.contains(&90.0));
    }

    #[tokio::test]
    async fn test_device_info_update() {
        let mut platform = OculusPlatform::new();
        assert!(platform.initialize().await.is_ok());

        let device_info = platform.get_device_info();
        assert_ne!(device_info.model, "Unknown");
        assert_eq!(device_info.manufacturer, "Meta");
    }
}