"""
modules/ar_interaction.py — FRIDAY AR Interaction Controls
Hand tracking + Mouse control for AR holograms.
"""

import os
import time
from typing import Optional, Tuple

from config import DATA_DIR

INTERACTION_FILE = os.path.join(DATA_DIR, "ar_interaction.json")


def _load() -> dict:
    if not os.path.exists(INTERACTION_FILE):
        return {"hand_enabled": False, "mouse_enabled": True, "last_hand_pos": None, "last_click": 0}
    try:
        import json
        with open(INTERACTION_FILE, "r") as f:
            return json.load(f)
    except:
        return {"hand_enabled": False, "mouse_enabled": True, "last_hand_pos": None, "last_click": 0}


def _save(data: dict) -> None:
    try:
        os.makedirs(DATA_DIR, exist_ok=True)
        import json
        with open(INTERACTION_FILE, "w") as f:
            json.dump(data, f)
    except:
        pass


# === Hand Tracking ===
def enable_hand_tracking(enabled: bool = True) -> str:
    """Enable/disable hand tracking."""
    data = _load()
    data["hand_enabled"] = enabled
    _save(data)
    return f"Hand tracking {'enabled' if enabled else 'disabled'}."


def is_hand_tracking() -> bool:
    return _load().get("hand_enabled", False)


def set_hand_position(x: float, y: float, z: float = 0.0) -> None:
    """Update hand position from tracking."""
    data = _load()
    data["last_hand_pos"] = {"x": x, "y": y, "z": z, "time": time.time()}
    _save(data)


def get_hand_position() -> Optional[dict]:
    """Get last hand position."""
    data = _load()
    pos = data.get("last_hand_pos")
    if pos and time.time() - pos.get("time", 0) < 0.5:  # Fresh within 500ms
        return pos
    return None


# === Mouse Control ===
def enable_mouse_control(enabled: bool = True) -> str:
    """Enable/disable mouse control."""
    data = _load()
    data["mouse_enabled"] = enabled
    _save(data)
    return f"Mouse control {'enabled' if enabled else 'disabled'}."


def is_mouse_enabled() -> bool:
    return _load().get("mouse_enabled", True)


def get_mouse_position() -> Tuple[int, int]:
    """Get current mouse position."""
    try:
        import ctypes
        pt = ctypes.wintypes.POINT()
        ctypes.windll.user32.GetCursorPos(ctypes.byref(pt))
        return (pt.x, pt.y)
    except:
        return (0, 0)


def simulate_click() -> None:
    """Simulate a mouse click."""
    try:
        import ctypes
        ctypes.windll.user32.mouse_event(0x0002, 0, 0, 0, 0)  # MOUSEEVENTF_LEFTDOWN
        ctypes.windll.user32.mouse_event(0x0004, 0, 0, 0, 0)  # MOUSEEVENTF_LEFTUP
    except:
        pass


def simulate_right_click() -> None:
    """Simulate a right mouse click."""
    try:
        import ctypes
        ctypes.windll.user32.mouse_event(0x0008, 0, 0, 0, 0)  # MOUSEEVENTF_RIGHTDOWN
        ctypes.windll.user32.mouse32mouse_event(0x0010, 0, 0, 0, 0)  # MOUSEEVENTF_RIGHTUP
    except:
        pass


def drag_to(x: int, y: int) -> None:
    """Drag mouse to position."""
    try:
        import ctypes
        ctypes.windll.user32.SetCursorPos(x, y)
    except:
        pass


# === AR Interaction State ===
def get_interaction_state() -> dict:
    """Get current interaction state for AR."""
    hand_pos = get_hand_position()
    mouse_pos = get_mouse_position()

    return {
        "hand_enabled": is_hand_tracking(),
        "mouse_enabled": is_mouse_enabled(),
        "hand_position": hand_pos,
        "mouse_position": mouse_pos,
    }


def process_gesture(gesture: str) -> str:
    """Process hand gesture commands."""
    gesture = gesture.lower()

    if "fist" in gesture or "grab" in gesture:
        simulate_click()
        return "Grab - Clicked!"
    elif "point" in gesture:
        return "Pointing..."
    elif "wave" in gesture:
        return "Waving..."
    elif "open" in gesture:
        return "Hand open..."
    else:
        return f"Gesture: {gesture}"


# === Voice Commands ===
def handle_command(command: str, speak) -> bool:
    c = command.lower()

    if "hand track" in c:
        if "enable" in c or "on" in c:
            result = enable_hand_tracking(True)
        elif "disable" in c or "off" in c:
            result = enable_hand_tracking(False)
        else:
            result = "Hand tracking enabled." if enable_hand_tracking(True) else ""
        speak(result)
        return True

    if "mouse control" in c:
        if "enable" in c or "on" in c:
            result = enable_mouse_control(True)
        elif "disable" in c or "off" in c:
            result = enable_mouse_control(False)
        else:
            result = "Mouse control enabled."
        speak(result)
        return True

    return False