"""
Arduino UNO Q Library
Bridge communication between MPU (Linux) and MCU (STM32)
"""

import time
import json
import sys
import os
import logging
from pathlib import Path

logger = logging.getLogger(__name__)

class ArduinoUNOQ:
    """Arduino UNO Q Bridge Communication Class"""
    
    def __init__(self):
        self.bridge_available = False
        self.setup_bridge()
        
    def setup_bridge(self):
        """Setup Arduino Bridge communication"""
        try:
            # Try to import Arduino Bridge library
            sys.path.append('/usr/lib/python3/dist-packages')
            # Note: Uncomment when Bridge library is available
            # import bridge
            # self.bridge = bridge.Bridge()
            # self.bridge_available = True
            logger.info("Arduino Bridge simulation mode (library not available)")
            self.bridge_available = False
        except ImportError:
            logger.warning("Arduino Bridge not available, running in simulation mode")
            self.bridge_available = False
        except Exception as e:
            logger.error(f"Failed to initialize Bridge: {e}")
            self.bridge_available = False
    
    def read_mcu_data(self):
        """Read data from MCU via Bridge"""
        # TODO: Implement your MCU data reading logic here
        if not self.bridge_available:
            return {"status": "simulated", "message": "Bridge not available"}
        
        try:
            # Example: Read digital pins
            data = {}
            # TODO: Add your pin reading logic
            # for pin in range(2, 14):
            #     value = self.bridge.digitalRead(pin)
            #     data[f"d{pin}"] = value
            
            return data
        except Exception as e:
            logger.error(f"Error reading MCU data: {e}")
            return {}
    
    def write_mcu_pin(self, pin, value):
        """Write to MCU pin via Bridge"""
        # TODO: Implement your MCU pin writing logic here
        if not self.bridge_available:
            logger.info(f"Simulated: Pin {pin} set to {value}")
            return True
        
        try:
            if isinstance(value, str) and value.lower() in ['high', 'low']:
                value = 1 if value.lower() == 'high' else 0
            
            # TODO: Add your pin writing logic
            # self.bridge.digitalWrite(pin, value)
            logger.info(f"Pin {pin} set to {value}")
            return True
        except Exception as e:
            logger.error(f"Error writing to pin {pin}: {e}")
            return False
    
    def send_led_matrix_command(self, text, speed=150, display_time=5000, direction=0):
        """Send LED Matrix command to MCU"""
        command = f'"{text}",{speed},{display_time},{direction}'
        
        if not self.bridge_available:
            logger.info(f"Simulated LED Matrix command: {command}")
            return True
        
        try:
            # Send command via serial to MCU
            # This would use actual Bridge serial communication
            # self.bridge.serial.write(command.encode())
            logger.info(f"LED Matrix command sent: {command}")
            return True
        except Exception as e:
            logger.error(f"Error sending LED Matrix command: {e}")
            return False
    
    def process_command(self, command):
        """Process commands from external interface"""
        try:
            cmd_data = json.loads(command)
            cmd_type = cmd_data.get('type')
            
            if cmd_type == 'read':
                return self.read_mcu_data()
            elif cmd_type == 'write':
                pin = cmd_data.get('pin')
                value = cmd_data.get('value')
                return {"success": self.write_mcu_pin(pin, value)}
            elif cmd_type == 'led_matrix':
                text = cmd_data.get('text', 'Hallo World')
                speed = cmd_data.get('speed', 150)
                display_time = cmd_data.get('time', 5000)
                direction = cmd_data.get('direction', 0)
                return {"success": self.send_led_matrix_command(text, speed, display_time, direction)}
            elif cmd_type == 'status':
                return {
                    "bridge_available": self.bridge_available,
                    "uptime": time.time(),
                    "status": "running"
                }
            else:
                return {"error": "Unknown command type"}
                
        except json.JSONDecodeError:
            return {"error": "Invalid JSON command"}
        except Exception as e:
            return {"error": str(e)}
    
    def main_loop(self):
        """Main application loop"""
        logger.info("Arduino UNO Q MPU Application Started")
        
        # Create command pipe for external communication
        cmd_pipe = Path('/tmp/unoq_cmd.pipe')
        status_file = Path('/tmp/unoq_status.json')
        
        try:
            # Create named pipe if it doesn't exist
            if not cmd_pipe.exists():
                os.mkfifo(cmd_pipe)
        except:
            pass
        
        while True:
            try:
                # TODO: Add your main application logic here
                
                # Check for commands
                if cmd_pipe.exists():
                    try:
                        with open(str(cmd_pipe), 'r') as f:
                            command = f.read().strip()
                            if command:
                                result = self.process_command(command)
                                
                                # Write result to status file
                                with open(str(status_file), 'w') as f:
                                    json.dump(result, f)
                    except:
                        pass
                
                # Periodic status update
                current_data = self.read_mcu_data()
                current_data["timestamp"] = str(int(time.time()))
                current_data["status"] = "running"
                
                with open(str(status_file), 'w') as f:
                    json.dump(current_data, f)
                
                time.sleep(1)  # Update every second
                
            except KeyboardInterrupt:
                logger.info("Shutting down...")
                break
            except Exception as e:
                logger.error(f"Error in main loop: {e}")
                time.sleep(5)  # Wait before retrying