const AbstractGitState = require('./AbstractGitState')

class PullState extends AbstractGitState {
    #ran_once = false

    static get services() {
        return [...super.services, 'output']
    }

    async apply() {
        if ( !(await this.check()) ) {
            const repo = await this._repo()
            await repo.pull(this._config.target)
            this.#ran_once = true
        }
    }

    async check() {
        return this.#ran_once // TODO support a better check here
    }

    async reverse() {
        this.output.warn('Pull state does not currently support automatic reversal.')
    }

    failure_message() {
        return `The Git repo at "${this._config.path}" on host "${this._host.name}" will be pulled.`
    }

    check_message() {
        return this.failure_message()
    }

    display() {
        return `Pull refs in repo ${this._config.path}...`
    }
}

module.exports = exports = PullState