import * as logger from './log'
import { mqttHandler } from './MqttDispatcher'
import { HasInTopic } from './AItem'
import { AHomegearItem } from './AHomegearItem'
// import { MaxWindowContact } from './MaxWindowContact';
import { ThermostatExport, HeatingMainSwitchExport, ExportType } from './Export'
import { Disabler } from './Disabler'

const DISABLED_TEMPERATURE: number = 5.0

type DisabledHolder = {
    disabler : Disabler
    state : string
}

export class MaxThermostat extends AHomegearItem implements HasInTopic {
    private actionTopic: string
    private deviceFeedbackTopic: string
    private temperatureFeedbackTopic: string
    private temperatureTopic: string
    private temperature: number
    private presetTemperatureFeedbackTopic: string
    private presetTemperatureTopic: string
    private presetTemperature: number
    private hardDisablerMap: { [key:string]: DisabledHolder }
    private hardDisabled: boolean
    private commandTopic: string

    static heatingMainSwitchTopic : string = 'dispatcher_ng/items/heatingMainSwitch'
    private heatingMainFlag: boolean = false

    //    Thermostat: homegear/instance1/set/3/1/SET_TEMPERATURE

    getInTopic() : string {
        return this.commandTopic
    }

    exportItem() : ExportType|null {
        return ThermostatExport(this.itemId, this.label, this.temperatureTopic, this.temperatureFeedbackTopic, this.presetTemperatureTopic, this.presetTemperatureFeedbackTopic)
    }

    static exportHeatingMainSwitchItem() : ExportType|null {
        return HeatingMainSwitchExport(MaxThermostat.heatingMainSwitchTopic)
    }

    constructor(floor: string, room: string, item: string, label: string, hmId: number, hardDisablers: Disabler[]) {
        super(floor, room, item, label, hmId)
        this.temperatureTopic = `${this.topicFirstPart}/temperature`
        this.temperatureFeedbackTopic = `${this.topicFirstPart}/temperature/feedback`
        this.presetTemperatureTopic = `${this.topicFirstPart}/presetTemperature`
        this.presetTemperatureFeedbackTopic = `${this.topicFirstPart}/presetTemperature/feedback`
        this.deviceFeedbackTopic = `${this.deviceTopicPre}/1/SET_TEMPERATURE`
        this.actionTopic = `${this.actionTopicPre}/1/SET_TEMPERATURE`
        this.commandTopic = `${this.topicFirstPart}/command`
        this.subscribeTopics = [
            this.temperatureTopic,
            this.presetTemperatureTopic,
            this.deviceFeedbackTopic,
            this.commandTopic,
            MaxThermostat.heatingMainSwitchTopic
        ]
        this.hardDisabled = false
        this.hardDisablerMap = {}
        hardDisablers.forEach((hardDisabler) => {
            this.subscribeTopics.push(hardDisabler.getStateFeedbackTopic())
            this.hardDisablerMap[hardDisabler.getStateFeedbackTopic()] = { disabler: hardDisabler, state: 'unknown' }
        })
    }

    setPresetTemperature(presetTemperature: number) {
        this.presetTemperature = presetTemperature
    }

    startFunc() : void {
        mqttHandler.send(this.presetTemperatureTopic, `${this.presetTemperature}`)
    }

    processMessage(topic: string, payload: string) : void {
        let setTemperature : boolean = false
        if (topic == this.temperatureTopic) {
            this.temperature = parseFloat(payload)
            setTemperature = true
        } else if (topic == this.commandTopic) {
            if ((payload == 'ON') && this.heatingMainFlag) {
                this.temperature = this.presetTemperature
                setTemperature = true
            } else if (payload == 'OFF') {
                this.temperature = DISABLED_TEMPERATURE
                setTemperature = true
            } else if (payload == 'FORCE_ON') {
                this.temperature = this.presetTemperature
                setTemperature = true
            }
        } else if (topic == MaxThermostat.heatingMainSwitchTopic) {
            this.heatingMainFlag = (payload == 'ON')
            logger.info(`${this.itemId} heating main: ${this.heatingMainFlag}`)
            if (! this.heatingMainFlag) {
		this.temperature = DISABLED_TEMPERATURE
                mqttHandler.send(this.temperatureFeedbackTopic, `${this.temperature}`)
                mqttHandler.send(this.actionTopic, `${this.temperature}`)
            }
        } else if (topic == this.presetTemperatureTopic) {
                this.presetTemperature = parseFloat(payload)
                mqttHandler.send(this.presetTemperatureFeedbackTopic, `${this.presetTemperature}`)
        } else if (topic == this.deviceFeedbackTopic) {
            // this.temperature = parseFloat(payload)
            setTemperature = false
        } else if (topic in this.hardDisablerMap) {
            this.hardDisablerMap[topic].state = this.hardDisablerMap[topic].disabler.transform(payload)
            this.hardDisabled = false
            Object.values(this.hardDisablerMap).forEach((w) => {
                if (w.state == 'DISABLE') {
                    this.hardDisabled = true
                }
            })
            setTemperature = true
        }

        if (setTemperature) {
           if (! this.hardDisabled) {
                mqttHandler.send(this.temperatureFeedbackTopic, `${this.temperature}`)
                mqttHandler.send(this.actionTopic, `${this.temperature}`)
            } else {
                mqttHandler.send(this.temperatureFeedbackTopic, `${DISABLED_TEMPERATURE}`)
                mqttHandler.send(this.actionTopic, `${DISABLED_TEMPERATURE}`)
            }
        }
    }


}