"""
T3R-SL Device Controller
Handles communication with T3R-SL device via USB/Serial

The T3R-SL is a specialized instrument control device that provides
timing, triggering, and coordination for the SRAS scanning system.
"""

import time
from typing import Dict, List, Optional


class T3RDevice:
    """
    Controller for T3R-SL device

    Provides methods for:
    - Connecting/disconnecting
    - Device initialization and homing
    - Status monitoring
    - Trigger and timing control
    """

    def __init__(self):
        """Initialize T3R device controller"""
        self._connected = False
        self._port = None
        self._homed = False
        self._ready = False

        # Device state
        self._initialized = False
        self._error_state = False

        print("INFO: T3R-SL Device controller initialized (stub)")

    def get_available_ports(self) -> List[str]:
        """
        Get list of available COM ports

        Returns:
            list: Available port names
        """
        # Stub implementation - return dummy ports
        # In production, would scan for actual serial ports
        return [
            "COM1", "COM2", "COM3", "COM4", "COM5",
            "/dev/ttyUSB0", "/dev/ttyUSB1", "/dev/ttyUSB2"
        ]

    def connect(self, port: str) -> bool:
        """
        Connect to T3R device on specified port

        Args:
            port: COM port name

        Returns:
            bool: True if connection successful
        """
        print(f"DEBUG: Connecting to T3R device on {port}")

        # Stub implementation
        time.sleep(0.1)

        self._port = port
        self._connected = True
        self._ready = False  # Need to initialize after connect

        print(f"INFO: Connected to T3R device on {port}")

        # Auto-initialize
        return self._initialize()

    def disconnect(self) -> bool:
        """
        Disconnect from T3R device

        Returns:
            bool: True if disconnection successful
        """
        print("DEBUG: Disconnecting from T3R device")

        self._connected = False
        self._homed = False
        self._ready = False
        self._initialized = False

        print("INFO: Disconnected from T3R device")
        return True

    def is_connected(self) -> bool:
        """Check if device is connected"""
        return self._connected

    def _initialize(self) -> bool:
        """
        Initialize T3R device after connection

        Returns:
            bool: True if initialization successful
        """
        print("DEBUG: Initializing T3R device")

        if not self._connected:
            print("ERROR: Cannot initialize - device not connected")
            return False

        # Stub - simulate initialization
        time.sleep(0.2)

        self._initialized = True
        self._error_state = False

        # Perform homing
        return self.home()

    def home(self) -> bool:
        """
        Home/zero T3R device

        Returns:
            bool: True if homing successful
        """
        print("DEBUG: Homing T3R device")

        if not self._connected or not self._initialized:
            print("ERROR: Cannot home - device not initialized")
            return False

        # Stub - simulate homing
        time.sleep(0.3)

        self._homed = True
        self._ready = True

        print("INFO: T3R device homed successfully")
        return True

    def get_status(self) -> Dict[str, bool]:
        """
        Get current device status

        Returns:
            dict: Status information
        """
        return {
            'connected': self._connected,
            'initialized': self._initialized,
            'homed': self._homed,
            'ready': self._ready,
            'error': self._error_state
        }

    def prepare_for_scan(self, params: Dict) -> bool:
        """
        Prepare T3R device for scanning operation

        Args:
            params: Scan parameters dictionary

        Returns:
            bool: True if preparation successful
        """
        print("DEBUG: Preparing T3R device for scan")
        print(f"  Number of scans: {params.get('num_scans', 1)}")
        print(f"  Trigger voltage: {params.get('trigger_voltage', 0)}V")

        if not self._ready:
            print("ERROR: T3R device not ready for scanning")
            return False

        # Configure device for scan parameters
        # Stub implementation
        time.sleep(0.1)

        print("INFO: T3R device ready for scanning")
        return True

    def trigger_acquisition(self) -> bool:
        """
        Trigger a data acquisition event

        Returns:
            bool: True if trigger successful
        """
        if not self._ready:
            print("ERROR: Cannot trigger - device not ready")
            return False

        print("DEBUG: Triggering acquisition")
        # Stub - would send trigger command
        return True

    def read_position(self) -> Optional[float]:
        """
        Read current position from T3R device

        Returns:
            float: Current position value, or None if error
        """
        if not self._ready:
            return None

        # Stub - return dummy position
        return 0.0

    def set_timing_parameters(self, acquisition_time: float,
                            delay_time: float) -> bool:
        """
        Set timing parameters for acquisition

        Args:
            acquisition_time: Acquisition window time in seconds
            delay_time: Delay before acquisition in seconds

        Returns:
            bool: True if parameters set successfully
        """
        print(f"DEBUG: Setting timing - acq: {acquisition_time}s, delay: {delay_time}s")

        if not self._connected:
            print("ERROR: Device not connected")
            return False

        # Stub implementation
        return True

    def get_error_status(self) -> Dict[str, any]:
        """
        Get detailed error status

        Returns:
            dict: Error status information
        """
        return {
            'has_error': self._error_state,
            'error_code': 0,
            'error_message': 'No error'
        }

    def reset(self) -> bool:
        """
        Reset T3R device to initial state

        Returns:
            bool: True if reset successful
        """
        print("DEBUG: Resetting T3R device")

        if not self._connected:
            return False

        self._error_state = False
        self._homed = False
        self._ready = False

        # Re-initialize
        return self._initialize()