const hap = require("hap-nodejs");

const pysh = require("python-shell");

const Accessory = hap.Accessory;

const Characteristic = hap.Characteristic;

const CharacteristicEventTypes = hap.CharacteristicEventTypes;

const AccessoryEventTypes = hap.AccessoryEventTypes;

const Service = hap.Service;

const uuid = hap.uuid;

const accessoryUuid = hap.uuid.generate("hap.accessories.doorbell-lock");

const accessory = new Accessory("Doorbell and Lock", accessoryUuid);

const doorbellService = new Service.Doorbell("Doorbell");

const lockService = new Service.LockMechanism("Lock");

const lockTargetStateCharacteristic = lockService.getCharacteristic(Characteristic.LockTargetState);

const lockCurrentStateCharacteristic = lockService.getCharacteristic(Characteristic.LockCurrentState);

const doorbellSwitchCharacteristic = doorbellService.getCharacteristic(Characteristic.ProgrammableSwitchEvent);

function Door() {

    this.lockTimeout = 10000; // milliseconds - 10 sec

    this.pyshell = new pysh.PythonShell("doord.py", {

        mode: "text",

        pythonPath: "/usr/bin/python3",

        pythonOptions: ["-u"],

        scriptPath: "python/"

    });

    this.lock = () => {

        console.log("locking door");

        this.pyshell.send("lock");

    };

    this.unlock = () => {

        console.log("unlocking door");

        this.pyshell.send("unlock");

    };

    this.identify = () => { console.log("identify door"); };

    this.listenDoorbell = (doorbellOnCallback, doorbellOffCallback) => {

        this.pyshell.on("message", (message) => {

            console.log(message);

            switch(message) {

            case "doorbell on":

                doorbellOnCallback();

                break;

            case "doorbell off":

                doorbellOffCallback();

                break;

            }

        });

    };

}

const door = new Door();

function setDoorTargetState(value) {

    switch(value) {

    case Characteristic.LockTargetState.UNSECURED:

        unlockDoor();

        break;

    case Characteristic.LockTargetState.SECURED:

        lockDoor();

        break;

    }

}

function unlockDoor() {

    door.unlock();

    lockCurrentStateCharacteristic.setValue(Characteristic.LockCurrentState.UNSECURED);

    scheduleUnlockTimeout();

}

function lockDoor() {

    door.lock();

    lockCurrentStateCharacteristic.setValue(Characteristic.LockCurrentState.SECURED);

}

function scheduleUnlockTimeout() {

    setTimeout(() => {

        console.log("unlock timeout door");

        lockTargetStateCharacteristic.setValue(Characteristic.LockTargetState.SECURED);

    }, door.lockTimeout);

}

door.listenDoorbell(

    () => {

        doorbellSwitchCharacteristic.setValue(Characteristic.ProgrammableSwitchEvent.SINGLE_PRESS);

    },

    () => {}

);

// set initial state

lockTargetStateCharacteristic.setValue(Characteristic.LockTargetState.SECURED);

lockCurrentStateCharacteristic.setValue(Characteristic.LockCurrentState.SECURED);

lockTargetStateCharacteristic.on(CharacteristicEventTypes.SET, (value, callback) => {

    setDoorTargetState(value);

    callback();

});

accessory.on(AccessoryEventTypes.IDENTIFY, (paired, callback) => {

    door.identify();

    callback();

});

accessory.addService(doorbellService);

accessory.addService(lockService);

accessory.getService(Service.AccessoryInformation)

    .setCharacteristic(Characteristic.Manufacturer, "Raspberry Pi")

    .setCharacteristic(Characteristic.Model, "Zero W")

    .setCharacteristic(Characteristic.SerialNumber, "A1S2NASF88EW");

accessory.publish({

  username: "C1:5D:3A:EA:54:AB",

  pincode: "031-45-154",

  category: hap.Categories.DOOR_LOCK

});

console.log("Accessory initialized");