"""Core VR/AR scene management and environment setup."""

from __future__ import annotations

import json
import logging
import math
import time
from dataclasses import dataclass, field
from enum import Enum
from typing import Dict, List, Optional, Tuple, Union
import warnings

import numpy as np

logger = logging.getLogger(__name__)


class XRMode(Enum):
    """Extended Reality operation modes."""
    VR = "vr"  # Virtual Reality
    AR = "ar"  # Augmented Reality
    MR = "mr"  # Mixed Reality
    DESKTOP = "desktop"  # Desktop preview


@dataclass
class XRConfiguration:
    """Configuration for XR environments."""
    mode: XRMode = XRMode.VR
    render_eye_resolution: Tuple[int, int] = (1920, 1080)
    fov: float = 110.0  # Field of view in degrees
    ipd: float = 0.064  # Interpupillary distance in meters
    tracking_origin: str = "floor"  # "floor" or "eye"
    performance_level: str = "balanced"  # "low", "balanced", "high"
    comfort_settings: Dict = field(default_factory=lambda: {
        "motion_comfort": True,
        "snap_turning": False,
        "teleport_locomotion": True,
        "comfort_vignetting": True
    })


class XREnvironment:
    """Base class for XR environments."""

    def __init__(self, config: Optional[XRConfiguration] = None):
        self.config = config or XRConfiguration()
        self.is_active = False
        self.objects = []
        self.controllers = []
        self.tracking_data = {}

    def initialize(self) -> bool:
        """Initialize the XR environment."""
        logger.info(f"Initializing XR environment in {self.config.mode.value} mode")
        self.is_active = True
        return True

    def shutdown(self):
        """Shutdown the XR environment."""
        logger.info("Shutting down XR environment")
        self.is_active = False

    def add_object(self, obj):
        """Add an object to the XR scene."""
        self.objects.append(obj)

    def remove_object(self, obj):
        """Remove an object from the XR scene."""
        if obj in self.objects:
            self.objects.remove(obj)

    def get_head_pose(self) -> Tuple[np.ndarray, np.ndarray]:
        """Get the current head position and rotation."""
        # Default implementation returns identity
        position = np.array([0.0, 1.6, 0.0])  # Average eye height
        rotation = np.eye(3)
        return position, rotation

    def get_controller_poses(self) -> List[Tuple[np.ndarray, np.ndarray]]:
        """Get positions and rotations of all controllers."""
        # Default implementation returns empty list
        return []


class VRScene(XREnvironment):
    """Virtual Reality scene manager."""

    def __init__(self, config: Optional[XRConfiguration] = None):
        if config is None:
            config = XRConfiguration(mode=XRMode.VR)
        super().__init__(config)
        self.room_scale = True
        self.guardian_bounds = None

    def setup_room_scale(self, bounds: Optional[List[Tuple[float, float]]] = None):
        """Setup room-scale VR tracking."""
        if bounds:
            self.guardian_bounds = bounds
        else:
            # Default 2m x 2m play area
            self.guardian_bounds = [(-1, -1), (1, -1), (1, 1), (-1, 1)]
        logger.info(f"Room-scale VR setup with bounds: {self.guardian_bounds}")

    def start_vr_session(self):
        """Start the VR session."""
        if not self.initialize():
            raise RuntimeError("Failed to initialize VR environment")

        logger.info("Starting VR session...")
        self.setup_room_scale()

        # Simulate VR session (in real implementation, this would interface with VR SDK)
        print("🥽 VR Session Started!")
        print("   - Head tracking: Active")
        print("   - Controller tracking: Active")
        print("   - Room-scale bounds: Configured")
        print("   - Press any key to exit VR...")

    def add_chart(self, chart, position: Tuple[float, float, float] = (0, 1.5, -2)):
        """Add a chart to the VR scene at specified position."""
        vr_chart = VRChart(chart, position)
        self.add_object(vr_chart)
        logger.info(f"Added chart to VR scene at position {position}")
        return vr_chart


class ARScene(XREnvironment):
    """Augmented Reality scene manager."""

    def __init__(self, config: Optional[XRConfiguration] = None):
        if config is None:
            config = XRConfiguration(mode=XRMode.AR)
        super().__init__(config)
        self.camera_feed = None
        self.plane_detection = True
        self.light_estimation = True

    def start_ar_session(self):
        """Start the AR session."""
        if not self.initialize():
            raise RuntimeError("Failed to initialize AR environment")

        logger.info("Starting AR session...")

        # Simulate AR session
        print("📱 AR Session Started!")
        print("   - Camera feed: Active")
        print("   - Plane detection: Enabled")
        print("   - Light estimation: Enabled")
        print("   - Tap to place charts in your environment")

    def add_chart(self, chart, anchor_position: Optional[Tuple[float, float, float]] = None):
        """Add a chart to the AR scene with world anchoring."""
        if anchor_position is None:
            # Default position in front of user
            anchor_position = (0, 0, -1)

        ar_chart = ARChart(chart, anchor_position)
        self.add_object(ar_chart)
        logger.info(f"Added chart to AR scene with anchor at {anchor_position}")
        return ar_chart

    def detect_planes(self) -> List[Dict]:
        """Detect horizontal and vertical planes in the environment."""
        # Simulated plane detection
        planes = [
            {"type": "horizontal", "position": [0, 0, 0], "normal": [0, 1, 0], "size": [2, 2]},
            {"type": "vertical", "position": [0, 1, -2], "normal": [0, 0, 1], "size": [3, 2]}
        ]
        return planes


class VRChart:
    """Chart wrapper for VR environments."""

    def __init__(self, chart, position: Tuple[float, float, float]):
        self.chart = chart
        self.position = np.array(position)
        self.scale = 1.0
        self.rotation = np.eye(3)
        self.interactive = True

    def set_scale(self, scale: float):
        """Set the scale of the chart in VR space."""
        self.scale = scale

    def set_rotation(self, rotation_matrix: np.ndarray):
        """Set the rotation of the chart."""
        self.rotation = rotation_matrix

    def enable_interaction(self, enabled: bool = True):
        """Enable/disable VR controller interaction."""
        self.interactive = enabled


class ARChart:
    """Chart wrapper for AR environments."""

    def __init__(self, chart, anchor_position: Tuple[float, float, float]):
        self.chart = chart
        self.anchor_position = np.array(anchor_position)
        self.scale = 0.5  # Smaller default scale for AR
        self.rotation = np.eye(3)
        self.world_anchored = True

    def set_world_anchor(self, position: Tuple[float, float, float]):
        """Set a new world anchor position."""
        self.anchor_position = np.array(position)

    def set_scale(self, scale: float):
        """Set the scale of the chart in AR space."""
        self.scale = scale