"""
Light Accessory Implementations for HomeKit

Implements different light types:
- OnOffLightAccessory: Simple on/off light
- DimmableLightAccessory: Light with brightness control
- ColorLightAccessory: RGB light with full color control
"""

from pyhap.accessory import Accessory
from pyhap.const import CATEGORY_LIGHTBULB


class OnOffLightAccessory(Accessory):
    """Simple On/Off Light without dimming or color."""
    
    category = CATEGORY_LIGHTBULB
    
    def __init__(self, driver, device, api_client, display_name=None, *args, **kwargs):
        """
        Initialize the light accessory.
        
        Args:
            driver: HAP driver instance
            device: Device object from DeviceRegistry
            api_client: ApiClient for sending commands
            display_name: Optional display name (defaults to device.friendly_name)
        """
        name = display_name or device.friendly_name or device.name
        super().__init__(driver, name, *args, **kwargs)
        self.device = device
        self.api_client = api_client
        
        # Add Lightbulb service with On characteristic
        self.lightbulb_service = self.add_preload_service('Lightbulb')
        
        # Get the On characteristic and set callback
        self.on_char = self.lightbulb_service.get_characteristic('On')
        self.on_char.setter_callback = self.set_on
    
    def set_on(self, value):
        """Called when HomeKit wants to turn light on/off."""
        power_state = "on" if value else "off"
        payload = {
            "type": "light",
            "payload": {"power": power_state}
        }
        self.api_client.post_device_set(self.device.device_id, payload["type"], payload["payload"])
    
    def update_state(self, state_payload):
        """Update state from API event."""
        if "power" in state_payload:
            is_on = state_payload["power"] == "on"
            self.on_char.set_value(is_on)


class DimmableLightAccessory(OnOffLightAccessory):
    """Dimmable Light with brightness control."""
    
    def __init__(self, driver, device, api_client, display_name=None, *args, **kwargs):
        # Don't call super().__init__() yet - we need to set up service first
        name = display_name or device.friendly_name or device.name
        Accessory.__init__(self, driver, name, *args, **kwargs)
        self.device = device
        self.api_client = api_client
        self.category = CATEGORY_LIGHTBULB
        
        # Create Lightbulb service with all characteristics at once
        from pyhap.loader import Loader
        loader = Loader()
        
        # Create the service
        lightbulb_service = loader.get_service('Lightbulb')
        
        # Add On characteristic
        on_char = lightbulb_service.get_characteristic('On')
        on_char.setter_callback = self.set_on
        self.on_char = on_char
        
        # Add Brightness characteristic
        brightness_char = loader.get_char('Brightness')
        brightness_char.set_value(0)
        brightness_char.setter_callback = self.set_brightness
        lightbulb_service.add_characteristic(brightness_char)
        self.brightness_char = brightness_char
        
        # Now add the complete service to the accessory
        self.add_service(lightbulb_service)
        self.lightbulb_service = lightbulb_service
    
    def set_brightness(self, value):
        """Called when HomeKit wants to change brightness."""
        payload = {
            "type": "light",
            "payload": {"brightness": int(value)}
        }
        self.api_client.post_device_set(self.device.device_id, payload["type"], payload["payload"])
    
    def update_state(self, state_payload):
        """Update state from API event."""
        super().update_state(state_payload)
        if "brightness" in state_payload:
            self.brightness_char.set_value(state_payload["brightness"])


class ColorLightAccessory(DimmableLightAccessory):
    """RGB Light with full color control."""
    
    def __init__(self, driver, device, api_client, display_name=None, *args, **kwargs):
        # Don't call super().__init__() - build everything from scratch
        name = display_name or device.friendly_name or device.name
        Accessory.__init__(self, driver, name, *args, **kwargs)
        self.device = device
        self.api_client = api_client
        self.category = CATEGORY_LIGHTBULB
        
        # Create Lightbulb service with all characteristics at once
        from pyhap.loader import Loader
        loader = Loader()
        
        # Create the service
        lightbulb_service = loader.get_service('Lightbulb')
        
        # Add On characteristic
        on_char = lightbulb_service.get_characteristic('On')
        on_char.setter_callback = self.set_on
        self.on_char = on_char
        
        # Add Brightness characteristic
        brightness_char = loader.get_char('Brightness')
        brightness_char.set_value(0)
        brightness_char.setter_callback = self.set_brightness
        lightbulb_service.add_characteristic(brightness_char)
        self.brightness_char = brightness_char
        
        # Add Hue characteristic
        hue_char = loader.get_char('Hue')
        hue_char.set_value(0)
        hue_char.setter_callback = self.set_hue
        lightbulb_service.add_characteristic(hue_char)
        self.hue_char = hue_char
        
        # Add Saturation characteristic
        saturation_char = loader.get_char('Saturation')
        saturation_char.set_value(0)
        saturation_char.setter_callback = self.set_saturation
        lightbulb_service.add_characteristic(saturation_char)
        self.saturation_char = saturation_char
        
        # Now add the complete service to the accessory
        self.add_service(lightbulb_service)
        self.lightbulb_service = lightbulb_service
    
    def set_hue(self, value):
        """Called when HomeKit wants to change hue."""
        payload = {
            "type": "light",
            "payload": {"hue": int(value)}
        }
        self.api_client.post_device_set(self.device.device_id, payload["type"], payload["payload"])
    
    def set_saturation(self, value):
        """Called when HomeKit wants to change saturation."""
        payload = {
            "type": "light",
            "payload": {"sat": int(value)}
        }
        self.api_client.post_device_set(self.device.device_id, payload["type"], payload["payload"])
    
    def update_state(self, state_payload):
        """Update state from API event."""
        super().update_state(state_payload)
        if "hue" in state_payload:
            self.hue_char.set_value(state_payload["hue"])
        if "sat" in state_payload:
            self.saturation_char.set_value(state_payload["sat"])