export class helpers {
  static runOnTargetOrSelectedTokens (runFunc) {
    let tokens = []
    const targets = Array.from(game.user.targets)
    if (targets.length > 0) {
      tokens = targets
    } else if (canvas.tokens.controlled.length > 0) {
      tokens = canvas.tokens.controlled
    }
    if (tokens.length > 0) {
      runFunc(tokens)
    } else {
      ui.notifications.error('Please select or target a token')
    }
  }

  static createEffectDocument (icon, name, durationRounds, changes) {
    const effectData = {
      icon,
      id: name,
      label: name,
      duration: { rounds: durationRounds },
      flags: {
        swade: {
          expiration: CONFIG.SWADE.CONST.STATUS_EFFECT_EXPIRATION.EndOfTurnPrompt,
          loseTurnOnHold: true
        }
      },
      changes
    }
    return effectData
  }

  static createMutationWithEffect (icon, name, durationRounds, changes) {
    const effect = helpers.createEffectDocument(icon, name, durationRounds, changes)
    const mutate = {
      embedded: { ActiveEffect: {} }
    }
    mutate.embedded.ActiveEffect[name] = effect
    return mutate
  }

  static defaultMutationOptions (name) {
    const mutateOptions = {
      comparisonKeys: { ActiveEffect: 'label' },
      name,
      permanent: true,
      description: name
    }
    return mutateOptions
  }

  static getActorFolderByPath (path) {
    const names = path.split('/')
    if (names[0] === '') {
      names.shift()
    }
    let name = names.shift()
    let folder = game.folders.find(f => f.name === name && !f.folder)
    while (names.length > 0) {
      name = names.shift()
      folder = folder.children.find(c => c.folder.name === name)
      folder = folder.folder
    }
    return folder
  }

  static getActorsInFolder (inFolder) {
    const prefixStack = ['']
    const actors = {}
    const folderStack = [inFolder]

    while (folderStack.length > 0) {
      const prefix = prefixStack.shift()
      const folder = folderStack.shift()
      for (const actor of folder.contents) {
        if (
          game.user.isGM || actor.testUserPermission(
            game.user, foundry.CONST.DOCUMENT_OWNERSHIP_LEVELS.OBSERVER)
        ) {
          actors[`${prefix}${actor.name}`] = actor
        }
      }
      for (const child of folder.children) {
        const newPrefix = `${prefix}${child.folder.name} | `
        prefixStack.push(newPrefix)
        folderStack.push(child.folder)
      }
    }
    return actors
  }
}