package devices

import (
	"fmt"
	"log"
	"strconv"
	"strings"
	"sync"
	"time"

	"git.k7n.net/mats/go-telldus/pkg/datastore"
	"git.k7n.net/mats/go-telldus/pkg/mqtt"
	"git.k7n.net/mats/go-telldus/pkg/telldus"
)

// EventManager handles telldus events and callbacks
type EventManager struct {
	store        *datastore.DataStore
	mqttClient   *mqtt.Client
	rawEvents    []datastore.RawEvent
	sensorEvents []datastore.SensorEvent
	mu           sync.Mutex
	maxEvents    int
}

// NewEventManager creates a new event manager
func NewEventManager(store *datastore.DataStore, mqttClient *mqtt.Client, maxEvents int) *EventManager {
	return &EventManager{
		store:      store,
		mqttClient: mqttClient,
		maxEvents:  maxEvents,
	}
}

// GetRawEvents returns a copy of raw events
func (em *EventManager) GetRawEvents() []datastore.RawEvent {
	em.mu.Lock()
	defer em.mu.Unlock()
	events := make([]datastore.RawEvent, len(em.rawEvents))
	copy(events, em.rawEvents)
	return events
}

// GetSensorEvents returns a copy of sensor events
func (em *EventManager) GetSensorEvents() []datastore.SensorEvent {
	em.mu.Lock()
	defer em.mu.Unlock()
	events := make([]datastore.SensorEvent, len(em.sensorEvents))
	copy(events, em.sensorEvents)
	return events
}

// HandleDeviceEvent handles device state change events
func (em *EventManager) HandleDeviceEvent(deviceID, method int, data string, callbackID int) {
	fmt.Printf("Device event: ID=%d, Method=%d, Data=%s\n", deviceID, method, data)

	var state string
	switch method {
	case telldus.MethodTurnOn:
		state = "ON"
	case telldus.MethodTurnOff:
		state = "OFF"
	}

	if state != "" {
		em.mqttClient.PublishDeviceState(deviceID, state)
	}
}

// HandleSensorEvent handles sensor data events
func (em *EventManager) HandleSensorEvent(protocol, model string, id, dataType int, value string, timestamp, callbackID int) {
	fmt.Printf("Sensor event: Protocol=%s, Model=%s, ID=%d, Type=%d, Value=%s, Timestamp=%d\n",
		protocol, model, id, dataType, value, timestamp)

	// Publish to MQTT
	em.mqttClient.PublishSensorValue(protocol, model, id, dataType, value)

	// Store in history
	em.mu.Lock()
	em.sensorEvents = append(em.sensorEvents, datastore.SensorEvent{
		Timestamp: time.Now(),
		Protocol:  protocol,
		Model:     model,
		ID:        id,
		DataType:  dataType,
		Value:     value,
	})
	if len(em.sensorEvents) > em.maxEvents {
		em.sensorEvents = em.sensorEvents[1:]
	}
	em.mu.Unlock()

	// Update last value in DB
	if err := em.store.UpdateSensorValue(protocol, model, id, dataType, value); err != nil {
		log.Printf("Error updating sensor %s %s %d: %v", protocol, model, id, err)
	}
}

// HandleRawDeviceEvent handles raw device detection events
func (em *EventManager) HandleRawDeviceEvent(data string, controllerID, callbackID int) {
	fmt.Printf("Raw device event: ControllerID=%d, Data=%s\n", controllerID, data)

	// Parse data
	fields := strings.Split(data, ";")
	var class, protocol, model, deviceID string
	for _, field := range fields {
		kv := strings.SplitN(field, ":", 2)
		if len(kv) == 2 {
			key, val := kv[0], kv[1]
			switch key {
			case "class":
				class = val
			case "protocol":
				protocol = val
			case "model":
				model = val
			case "id":
				deviceID = val
			}
		}
	}

	// Store in potential_devices
	potentialDev := &datastore.PotentialDevice{
		Class:    class,
		Protocol: protocol,
		Model:    model,
		DeviceID: deviceID,
		LastData: data,
		LastSeen: time.Now().Unix(),
	}
	if err := em.store.UpsertPotentialDevice(potentialDev); err != nil {
		log.Printf("Error storing potential device: %v", err)
	}

	// If sensor, ensure in sensors table
	if class == "sensor" {
		idInt, _ := strconv.Atoi(deviceID)
		sensor := &datastore.Sensor{
			Protocol:            protocol,
			Model:               model,
			ID:                  idInt,
			Name:                fmt.Sprintf("%s %s %s", protocol, model, deviceID),
			TemperatureUniqueID: fmt.Sprintf("telldus_sensor_%s_%s_%s_temperature", protocol, model, deviceID),
			HumidityUniqueID:    fmt.Sprintf("telldus_sensor_%s_%s_%s_humidity", protocol, model, deviceID),
		}
		if err := em.store.UpsertSensor(sensor); err != nil {
			log.Printf("Error inserting sensor from raw: %v", err)
		}
	}

	// Log the raw event data
	em.mu.Lock()
	em.rawEvents = append(em.rawEvents, datastore.RawEvent{
		Timestamp:    time.Now(),
		ControllerID: controllerID,
		Data:         data,
	})
	if len(em.rawEvents) > em.maxEvents {
		em.rawEvents = em.rawEvents[1:]
	}
	em.mu.Unlock()
}

// RegisterCallbacks registers all event callbacks with telldus
func (em *EventManager) RegisterCallbacks() {
	telldus.RegisterDeviceEvent(em.HandleDeviceEvent)
	telldus.RegisterSensorEvent(em.HandleSensorEvent)
	telldus.RegisterRawDeviceEvent(em.HandleRawDeviceEvent)
}