Seich/Beau

const Request = require('./request')
const RequestCache = require('./requestCache')

class RequestList {
    constructor(config = { REQUESTS: [] }) {
        this.list = this.loadRequests(config.REQUESTS, config.PLUGINS)
        this.cache = new RequestCache()

        this.cache.add(`env`, config.ENVIRONMENT)
    }

    async execByAlias(alias) {
        if (this.cache.exists(alias)) {
            return this.cache.get(alias)
        }

        const request = this.list.find((r) => r.ALIAS === alias)

        if (typeof request === 'undefined') {
            throw new Error(`${alias} not found among the requests.`)
        }

        try {
            await this.fetchDependencies(Array.from(request.DEPENDENCIES))
            return await request.exec(this.cache)
        } catch (reason) {
            throw new Error(
                `Request ${request.VERB} ${request.ENDPOINT} FAILED. \n${reason}`
            )
        }
    }

    async fetchDependencies(dependencies) {
        dependencies = dependencies.map((d) => this.execByAlias(d))
        await Promise.all(dependencies)

        return this.cache
    }

    loadRequests(REQUESTS, PLUGINS) {
        let requests = []
        REQUESTS.forEach((request) => {
            try {
                requests.push(new Request(request, PLUGINS))
            } catch (e) {
                throw new Error(`${request.request} was ignored: ${e}`)
            }
        })

        return requests
    }
}

module.exports = RequestList