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

class UpdateState extends State {
    static get services() {
        return [...super.services, 'output']
    }

    constructor(host, config) {
        if ( !host.packages ) {
            throw new Error(`Cannot apply update state to host ${host.name}: missing package manager API.`)
        }
        super(host, config)
    }

    async apply() {
        const packages = (await this._host.packages.list_updates()).map(x => x.name)
        await this._host.packages.update(...packages)
    }

    async check() {
        return (await this._host.packages.list_updates()).length === 0
    }

    async reverse() {
        this.output.warn(`Update state does not currently support reversing package updates. (Host: ${this._host.name})`)
    }
}

module.exports = exports = UpdateState