/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @providesModule NavigationTypeDefinition
 * @flow
 */
'use strict';

const Animated = require('Animated');

// Object Instances

export type NavigationAnimatedValue = Animated.Value;

// Value  & Structs.

export type NavigationGestureDirection = 'horizontal' | 'vertical';

export type NavigationState = {
  key: string,
};

export type NavigationParentState = {
  index: number,
  key: string,
  children: Array<NavigationState>,
};

export type NavigationAction = any;

export type NavigationLayout = {
  height: NavigationAnimatedValue,
  initHeight: number,
  initWidth: number,
  width: NavigationAnimatedValue,
};

export type NavigationPosition = NavigationAnimatedValue;

export type NavigationScene = {
  index: number,
  isStale: boolean,
  navigationState: NavigationState,
};

export type NavigationSceneRendererProps = {
  // The layout of the containing view of the scenes.
  layout: NavigationLayout,

  // The navigation state of the containing view.
  navigationState: NavigationParentState,

  // Callback to navigation with an action.
  onNavigate: NavigationActionCaller,

  // The progressive index of the containing view's navigation state.
  position: NavigationPosition,

  // The scene to render.
  scene: NavigationScene,

  // All the scenes of the containing view's.
  scenes: Array<NavigationScene>,
};

// Functions.

export type NavigationActionCaller = Function;

export type NavigationAnimationSetter = (
  position: NavigationAnimatedValue,
  newState: NavigationParentState,
  lastState: NavigationParentState,
) => void;

export type NavigationRenderer = (
  navigationState: NavigationState,
  onNavigate: NavigationActionCaller,
) => ReactElement;

export type NavigationReducer = (
  state: ?NavigationState,
  action: ?NavigationAction,
) => NavigationState;

export type NavigationSceneRenderer = (
  props: NavigationSceneRendererProps,
) => ?ReactElement;