import deepmerge from 'deepmerge'
import { experiments } from '@/../experimentConfig'

// Merge a default config with a specific scene config
const buildConfig = ({ defaultConfig = {}, scenesConfig = {} }, sceneName) =>
  deepmerge(defaultConfig, scenesConfig[sceneName] || {})

/**
* Build a configuration file by merging the default config with the asked scene.
* The asked scene config will overwrite the default config.
* It merges the mixin config with the experiment config.
* Experiment config overwrites all.
*
* @param {Object} experimentName The selected experiment
* @param {Object} sceneName The selected scene
* @returns {Object} The config for the selected experiment with the selected scene
*/
export const getExperimentConfig = (experimentName, sceneName) => {
  if (!experiments[experimentName])
    throw new Error(`Could not find the experiment "${experimentName}" in the config file.`)

  // Build parent mixin config
  const mixinConfig = buildConfig(experiments[experimentName].mixin, sceneName)
  // Build global config
  const globalConfig = buildConfig(experiments[experimentName], sceneName)
  // Merge configs
  return deepmerge(mixinConfig, globalConfig)
}

// /**
//  * Read config to get the list of available scenes for a given experiment
//  *
//  * @param {Object} experimentName The selected experiment
//  * @param {String[]} scenesList List of scenes
//  * @returns {String[]} The list of available scenes for this experiment
//  */
// export const getExperimentSceneList = (experimentName, scenesList) => {
//   // TODO: scene blacklist, scene array, all
//   return []
// }