module.exports = (providerParams) ->
  {$log} = providerParams
  ResourceCacheEntry = require('./resource_cache_entry')(providerParams)

  class ResourceCacheArrayEntry extends ResourceCacheEntry
    defaultValue: []
    cacheKeyPrefix: -> "#{@key}/array"

    addInstances: (instances, dirty, options = {append: false}) ->
      cacheArrayReferences = if options.append then @value else []
      cacheArrayReferences ?= []

      for instance in instances
        cacheInstanceParams = instance.$params()
        if Object.keys(cacheInstanceParams).length is 0
          $log.error """
            '#{@key}' instance doesn't have any boundParams. Please, make sure you specified them in your resource's initialization, f.e. `{id: "@id"}`, or it won't be cached.
          """
        else
          cacheArrayReferences.push cacheInstanceParams
          cacheInstanceEntry = new ResourceCacheEntry(@key, cacheInstanceParams).load()
          # if we're appending and there's already a resource entry, we won't clobber external intent (eg. $save) about that resource
          unless options.append and cacheInstanceEntry.value?
            cacheInstanceEntry.set instance, dirty
      @set cacheArrayReferences, dirty