"use strict";

const PoolDefaults = require("./PoolDefaults");

class PoolOptions {
  /**
   * @param {Object} opts
   *   configuration for the pool
   * @param {Number} [opts.max=null]
   *   Maximum number of items that can exist at the same time.  Default: 1.
   *   Any further acquire requests will be pushed to the waiting list.
   * @param {Number} [opts.min=null]
   *   Minimum number of items in pool (including in-use). Default: 0.
   *   When the pool is created, or a resource destroyed, this minimum will
   *   be checked. If the pool resource count is below the minimum, a new
   *   resource will be created and added to the pool.
   * @param {Number} [opts.maxWaitingClients=null]
   *   maximum number of queued requests allowed after which acquire calls will be rejected
   * @param {Boolean} [opts.testOnBorrow=false]
   *   should the pool validate resources before giving them to clients. Requires that either
   *   `factory.validate` or `factory.validateAsync` to be specified.
   * @param {Boolean} [opts.testOnReturn=false]
   *   should the pool validate resources before returning them to the pool.
   * @param {Number} [opts.acquireTimeoutMillis=null]
   *   Delay in milliseconds after which the an `acquire` call will fail. optional.
   *   Default: undefined. Should be positive and non-zero
   * @param {Number} [opts.priorityRange=1]
   *   The range from 1 to be treated as a valid priority
   * @param {Boolean} [opts.fifo=true]
   *   Sets whether the pool has LIFO (last in, first out) behaviour with respect to idle objects.
   *   if false then pool has FIFO behaviour
   * @param {Boolean} [opts.autostart=true]
   *   Should the pool start creating resources etc once the constructor is called
   * @param {Number} [opts.evictionRunIntervalMillis=0]
   *   How often to run eviction checks.  Default: 0 (does not run).
   * @param {Number} [opts.numTestsPerEvictionRun=3]
   *   Number of resources to check each eviction run.  Default: 3.
   * @param {Number} [opts.softIdleTimeoutMillis=-1]
   *   amount of time an object may sit idle in the pool before it is eligible
   *   for eviction by the idle object evictor (if any), with the extra condition
   *   that at least "min idle" object instances remain in the pool. Default -1 (nothing can get evicted)
   * @param {Number} [opts.idleTimeoutMillis=30000]
   *   the minimum amount of time that an object may sit idle in the pool before it is eligible for eviction
   *   due to idle time. Supercedes "softIdleTimeoutMillis" Default: 30000
   * @param {typeof Promise} [opts.Promise=Promise]
   *   What promise implementation should the pool use, defaults to native promises.
   */
  constructor(opts) {
    const poolDefaults = new PoolDefaults();

    opts = opts || {};

    this.fifo = typeof opts.fifo === "boolean" ? opts.fifo : poolDefaults.fifo;
    this.priorityRange = opts.priorityRange || poolDefaults.priorityRange;

    this.testOnBorrow =
      typeof opts.testOnBorrow === "boolean"
        ? opts.testOnBorrow
        : poolDefaults.testOnBorrow;
    this.testOnReturn =
      typeof opts.testOnReturn === "boolean"
        ? opts.testOnReturn
        : poolDefaults.testOnReturn;

    this.autostart =
      typeof opts.autostart === "boolean"
        ? opts.autostart
        : poolDefaults.autostart;

    if (opts.acquireTimeoutMillis) {
      // @ts-ignore
      this.acquireTimeoutMillis = parseInt(opts.acquireTimeoutMillis, 10);
    }

    if (opts.maxWaitingClients !== undefined) {
      // @ts-ignore
      this.maxWaitingClients = parseInt(opts.maxWaitingClients, 10);
    }

    // @ts-ignore
    this.max = parseInt(opts.max, 10);
    // @ts-ignore
    this.min = parseInt(opts.min, 10);

    this.max = Math.max(isNaN(this.max) ? 1 : this.max, 1);
    this.min = Math.min(isNaN(this.min) ? 0 : this.min, this.max);

    this.evictionRunIntervalMillis =
      opts.evictionRunIntervalMillis || poolDefaults.evictionRunIntervalMillis;
    this.numTestsPerEvictionRun =
      opts.numTestsPerEvictionRun || poolDefaults.numTestsPerEvictionRun;
    this.softIdleTimeoutMillis =
      opts.softIdleTimeoutMillis || poolDefaults.softIdleTimeoutMillis;
    this.idleTimeoutMillis =
      opts.idleTimeoutMillis || poolDefaults.idleTimeoutMillis;

    this.Promise = opts.Promise != null ? opts.Promise : poolDefaults.Promise;
  }
}

module.exports = PoolOptions;