import * as logger from './log'
import { mqttHandler } from './MqttDispatcher'
import { AHomematicItem } from './AHomematicItem'


export class HomematicDimmerItem extends AHomematicItem {
    private oldBright: number|undefined
    private bright: number
    private oldState: string|undefined
    private state: string
    private errorReducedTopic: string
    private errorOverloadTopic: string
    private errorOverheatTopic: string
    private actionTopic: string
    private brightFeedbackTopic: string
    private stateFeedbackTopic: string
    private brightTopic: string
    private stateTopic: string

    constructor(floor: string, room: string, item: string, label: string, hmId: number) {
        super(floor, room, item, label, hmId)
        this.stateTopic = `${this.topicFirstPart}/state`
        this.brightTopic = `${this.topicFirstPart}/bright`
        this.stateFeedbackTopic = `${this.topicFirstPart}/state/feedback`
        this.brightFeedbackTopic = `${this.topicFirstPart}/bright/feedback`
        this.actionTopic = `${this.actionTopicPre}/1/LEVEL`
        this.errorOverheatTopic = `${this.deviceTopicPre}/1/ERROR_OVERHEAT`
        this.errorOverloadTopic = `${this.deviceTopicPre}/1/ERROR_OVERLOAD`
        this.errorReducedTopic = `${this.deviceTopicPre}/1/ERROR_REDUCED`
        this.subscribeTopics = [
            this.stateTopic,
            this.brightTopic,
            this.errorOverheatTopic,
            this.errorOverloadTopic,
            this.errorReducedTopic
        ]
        this.state = 'OFF'
        this.oldState = undefined
        this.bright = 0.0
        this.oldBright = undefined
    }

    dimmerAction() : void {
        if ((this.state != this.oldState) || (this.bright != this.oldBright)) {                
            if (this.state == 'ON') {
                mqttHandler.send(this.actionTopic, `${this.bright / 100.0}`)
            } else {
                mqttHandler.send(this.actionTopic, '0')
            }
            this.oldState = this.state
            this.oldBright = this.bright
        }
    }

    processMessage(topic: string, payload: string) : void {
        switch (topic) {
            case this.stateTopic:
                this.state = payload
                mqttHandler.send(this.stateFeedbackTopic, this.state)
                this.dimmerAction()
                break
            case this.brightTopic:
                this.bright = parseFloat(payload)
                mqttHandler.send(this.brightFeedbackTopic, `${this.bright}`)
                this.dimmerAction()
                break
            case this.errorOverheatTopic:
            case this.errorOverloadTopic:
            case this.errorReducedTopic:
                if (payload != 'false') {
                    logger.warn(`Homematic dimmer ${this.hmId}, ${this.itemId} reports: ${topic}: ${payload}`)
                }
                break
        }
    }
}