/**
* Define a finite set of input actions and a finite set of output view states.
*
* This lives in a common module that both the android and iOS common modules depend on.
*/
class Search {

  /**
   * Defines default options for each filter section
   */
  data class FilterOptions(
    val filterCountryList: List<String> = defaultCountryList,
    val filterExitDirectionList: List<String> = exitDirectionList
  )

  sealed class Action {
    object InitializeFiltersAction : Search.Action()
    data class FilterOptionsLoadedAction(val filterOptions: FilterOptions) : Search.Action()

    object TapFilterCancelBtn : Search.Action()
    object TapOpenFilterIcon : Search.Action()
    object BackButtonTapAction : Search.Action()

    data class QueryChangeAction(
      val filterState: FilterState,
      val query: String
    ) : Search.Action()

    data class FilterUpdateAction(
      val filterState: FilterState,
      val query: String
    ) : Search.Action()

    data class SearchLoadedAction(
      val items: List<SearchResult>,
      val diffResult: DiffResult?
    ) : Search.Action()
  }

  enum class StateType {
    InitialState,
    FilterOptionsLoaded,
    ShowResultsState,
    CloseFilterState,
    ClosePageState,
    OpenFilterState
  }

  /*
  * StateType is our workaround to not wanting to redefine copy-able properties for each class 
  * definition within a sealed class.
  */
  data class State(
    val type: StateType,
    val items: List<SearchResult>,
    val diffResult: DiffResult?,
    val isFilterWindowVisible: Boolean = false,
    val filterOptions: FilterOptions = FilterOptions()
  )
}