robojones/z1

const Worker = require('../lib/class/Worker')
const states = Worker.states
const mergePorts = require('../lib/mergePorts')

module.exports = function list(config) {
    return new Promise(resolve => {
        const stats = {}

        /**
     * @typedef AppStats
     * @property {string} dir
     * @property {number} pending
     * @property {number} available
     * @property {number} killed
     * @property {number[]} ports
     * @property {number} workers - The number of workers that should be available.
     */

        /**
     * @typedef app
     * @property {string} dir
     * @property {string} name
     * @property {number} [reviveCount]
     * @property {number} [workers]
     */

        /**
     * Add an app to the stats.
     * @param {app} app
     */
        function addApp(app) {
            stats[app.name] = {
                dir: app.dir,
                pending: 0,
                available: 0,
                killed: 0,
                ports: [],
                reviveCount: app.reviveCount || 0,
                workers: app.workers || 0,
            }
        }

        // show every started app (even if no workers are running)
        config.apps.forEach(addApp)

        Worker.workerList.forEach(worker => {
            const { name } = worker

            // show stopped apps that have running workers
            if (!stats[name]) {
                addApp({
                    name,
                    dir: worker.dir,
                })
            }

            /** @type {AppStats} */
            const appStats = stats[name]

            // increase state counter
            const state = states[worker.state].toLowerCase()
            appStats[state]++

            // add ports
            appStats.ports = mergePorts(appStats.ports, worker.ports)
        })

        resolve({
            isResurrectable: global.isResurrectable,
            stats,
        })
    })
}