console.loggerName = 'js.equipment';
console.log('Load equipment modules');

class Equipment {
    constructor(equipmentItem) {

        // Fetch item if provided equipmentItem is a string
        if (typeof equipmentItem === 'string' || equipmentItem instanceof String) {
            this.equipmentItem = items[equipmentItem];
        } else {
            this.equipmentItem = equipmentItem;
        }

        // Throw error if item is not existing
        if (this.equipmentItem === null) {
            throw(`Item ${equipmentItem} not existing`);
        }

        // Throw error if item is not an equipment type
        if (this.equipmentItem.semantics.semanticType != 'Equipment') {
            throw(`Item ${this.equipmentItem.name} is not an equipment type`);            
        }

        console.info(`Initialization of equipment ${this.equipmentItem.name} with type ${this.constructor.name}`);

        // Initialization of properties
        this.name = this.equipmentItem.name;
        this.stateItem = items[this.getPropertyItemName('State')];
        this.watch = new Object();

        // Check if equipment has LowBat item
        if (this.hasProperty('LowBat')) {
            this.watch['lowBat'] = new watch.Watch(this.getPropertyItemName('LowBat'));
            this.watch['lowBat'].add({
                targetState: 'ON', 
                alertFunc: () => { this.#notifyLowBat(); },
                alertRepeat: 'PT23H'
            });
        }

        // Check if equipment has Unreach item
        if (this.hasProperty('Unreach')) {
            this.watch['Unreach'] = new watch.Watch(this.getPropertyItemName('Unreach'));
            this.watch['Unreach'].add({
                targetState: 'ON', 
                alertFunc: () => { this.#notifyUnreach(); },
                alertDelay: 'PT15M',
                alertRepeat: 'PT1H'
            });
        }
    }

    getValue(propertyName, defaultValue = '') {
        let valueItemName = this.name + '_' + propertyName;
        let returnValue = defaultValue;
  
        if (items[valueItemName] == null) {                             // Return default value if item is missing
            console.warn('Item ' + valueItemName + ' is missing');
        } else if (items[valueItemName]['state'] == 'NULL') {           // Return default value if item state is null
            console.warn('Item ' + valueItemName + ' is unset')
        } else {                                                        // Return value from item
            if (items[valueItemName].quantityState == null && items[valueItemName].numericState == null) {
                returnValue = items[valueItemName]['state'];                
            } else if (items[valueItemName].quantityState == null) {
                returnValue = items[valueItemName]['numericState']
            } else {
                returnValue = items[valueItemName].quantityState;
            }
        }       

        console.debug(`Return value ${valueName} for ${this.name}: ${returnValue}`);
        return returnValue;
    }

    getPropertyItemName(propertyName) {
        if (this.hasProperty(propertyName)) {
            return items[this.name + '_' + propertyName].name;            
        }
    }

    hasProperty(propertyName) {
        if (items[this.name + '_' + propertyName] == null) {
            console.debug(`Eqipment ${this.name} has no property ${propertyName}`)
            return false;
        }
        return true;
    }

    #notifyLowBat() {
        console.warn(`${this.name} has a low battery level.`);
    }

    #notifyUnreach() {
        console.warn(`${this.name} is offline.`);
    }

    gc() {
        console.log('Denitialization of eqipment ' + this.name);

        // Delete all watchObjects
        for (let watchItem of Object.keys(this.watch)) {
            this.watch[watchItem].deleteAll();
        }
    }
}

class Irrigation extends Equipment {
    constructor(equipmentItem) {
        super(equipmentItem);
    }
}

class IrrigationValve extends Equipment {
    constructor(equipmentItem) {
        super(equipmentItem);

        this.watch['state'] = new watch.Watch(this.stateItem.name);
        this.watch['state'].add({
            targetState: 'ON', 
            alertFunc: () => { this.stateItem.sendCommand('OFF'); },
            alertDelay: 'PT59M'
        });
    }
}

class TowelRadiator extends Equipment {
    constructor(equipmentItem) {
        super(equipmentItem);

        this.watch['state'] = new watch.Watch(this.stateItem.name);
        this.autoOff = this.watch['state'].add({
            targetState: 'ON', 
            alertFunc: () => { this.stateItem.sendCommand('OFF'); },
            alertDelay: 'PT59M'
        });
    }
}

class WeatherService extends Equipment {
    constructor(equipmentItem) {
        super(equipmentItem);
    }
}

module.exports = {
    Equipment,
    Irrigation,
    IrrigationValve,
    TowelRadiator,
    WeatherService
};