import { SensorServer } from "./sensorserver"
import {
    RealTimeClockCmd,
    RealTimeClockReg,
    RealTimeClockVariant,
    REFRESH,
    SRV_REAL_TIME_CLOCK,
} from "../jdom/constants"
import { JDRegisterServer } from "../jdom/servers/registerserver"
import { JDBus } from "../jdom/bus"
import { Packet } from "../jdom/packet"

/**
 * @internal
 */
export type RealTimeClockReadingType = [
    number,
    number,
    number,
    number,
    number,
    number,
    number,
]

/**
 * @internal
 */
export function dateToClock(n: Date): RealTimeClockReadingType {
    const year = n.getFullYear()
    const month = n.getMonth() + 1
    const dayOfMonth = n.getDate()
    const dayOfWeek = n.getDay()
    const hour = n.getHours()
    const min = n.getMinutes()
    const sec = n.getSeconds()

    return [year, month, dayOfMonth, dayOfWeek, hour, min, sec]
}

export class RealTimeClockServer extends SensorServer<RealTimeClockReadingType> {
    readonly drift: JDRegisterServer<[number]>
    readonly precision: JDRegisterServer<[number]>
    private lastSecond = 0

    constructor() {
        super(SRV_REAL_TIME_CLOCK, {
            readingValues: dateToClock(new Date()),
            variant: RealTimeClockVariant.Computer,
            streamingInterval: 1000,
        })

        this.drift = this.addRegister<[number]>(RealTimeClockReg.Drift, [0])
        this.precision = this.addRegister<[number]>(
            RealTimeClockReg.Precision,
            [0],
        )

        this.addCommand(RealTimeClockCmd.SetTime, this.handleSetTime.bind(this))
        this.on(REFRESH, this.refreshTime.bind(this))
    }

    static async syncTime(bus: JDBus) {
        const values = dateToClock(new Date())
        const pkt = Packet.jdpacked<RealTimeClockReadingType>(
            RealTimeClockCmd.SetTime,
            "u16 u8 u8 u8 u8 u8 u8",
            values,
        )
        await pkt.sendAsMultiCommandAsync(bus, SRV_REAL_TIME_CLOCK)
    }

    private handleSetTime(pkt: Packet) {
        //console.debug(`set time`, { pkt })
    }

    private refreshTime() {
        const d = new Date()
        const s = d.getSeconds()
        if (s !== this.lastSecond) {
            const r = dateToClock(d)
            this.reading.setValues(r)
            this.lastSecond = s
        }
    }
}