const State = require('../State')

class ServiceState extends State {
    constructor(host, config) {
        if ( !host.services ) {
            throw new Error(`Cannot apply service state to host ${host.name}: missing service manager API.`)
        }
        super(host, config)
    }

    async apply() {
        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
        return this._host.services.start(...services)
    }

    async check() {
        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
        let states = await this._host.services.status(...services)
        if ( !Array.isArray(states) ) states = [states]
        return states.every(x => x.status === 'running')
    }

    async reverse() {
        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
        return this._host.services.stop(...services)
    }

    failure_message() {
        const services = Array.isArray(this._config.service) ? this._config.service : [this._config.service]
        return `The service(s) ${services.join(', ')} do not all exist on the host "${this._host.name}."`
    }

    check_message() {
        return this.failure_message()
    }

    display() {
        return `Ensure that the ${this._config.service} service is running...`
    }
}

module.exports = exports = ServiceState