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



export class TimerAdaptor extends AItem {
    private timer: NodeJS.Timer|null
    private delay: number
    private state: string
    private inTopic: string
    private actionStateTopic: string

    constructor(floor: string, room: string, item: string, delay: number) {
        super(floor, room, item)
        this.actionStateTopic = `${this.topicFirstPart}/state`
        this.inTopic = `${this.topicFirstPart}/timerIn`
        this.subscribeTopics = [ this.inTopic ]
        this.state = 'OFF'
        this.delay = delay
        this.timer = null
    }

    processMessage(topic: string, payload: string) : void {
        switch (topic) {
            case this.inTopic:
                switch (payload) {
                    case 'SHORT':
                        if ((this.state == 'ON') && (this.timer != null)) {
                            clearTimeout(this.timer)
                        }
                        this.state = 'ON'
                        mqttHandler.send(this.actionStateTopic, this.state, true)
                        this.timer = setTimeout(() => {
                            logger.info(`timer ${this.itemId} elapsed`)
                            this.state = 'OFF'
                            mqttHandler.send(this.actionStateTopic, this.state, true)
                        }, (this.delay * 1000))
                        break
                    case 'LONG_END':
                        if (this.timer != null) {
                            clearTimeout(this.timer)
                        }
                        if (this.state == 'OFF') {
                            this.state = 'ON'
                        } else {
                            this.state = 'OFF'
                        }
                        mqttHandler.send(this.actionStateTopic, this.state, true)
                        break
                }  
                break
        }
    }
}