/**
 * Copyright 2013 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @providesModule SimpleEventPlugin
 */

"use strict";

var EventConstants = require('EventConstants');
var EventPropagators = require('EventPropagators');
var SyntheticClipboardEvent = require('SyntheticClipboardEvent');
var SyntheticEvent = require('SyntheticEvent');
var SyntheticFocusEvent = require('SyntheticFocusEvent');
var SyntheticKeyboardEvent = require('SyntheticKeyboardEvent');
var SyntheticMouseEvent = require('SyntheticMouseEvent');
var SyntheticTouchEvent = require('SyntheticTouchEvent');
var SyntheticUIEvent = require('SyntheticUIEvent');
var SyntheticWheelEvent = require('SyntheticWheelEvent');

var invariant = require('invariant');
var keyOf = require('keyOf');

var topLevelTypes = EventConstants.topLevelTypes;

var eventTypes = {
  blur: {
    phasedRegistrationNames: {
      bubbled: keyOf({onBlur: true}),
      captured: keyOf({onBlurCapture: true})
    }
  },
  click: {
    phasedRegistrationNames: {
      bubbled: keyOf({onClick: true}),
      captured: keyOf({onClickCapture: true})
    }
  },
  copy: {
    phasedRegistrationNames: {
      bubbled: keyOf({onCopy: true}),
      captured: keyOf({onCopyCapture: true})
    }
  },
  cut: {
    phasedRegistrationNames: {
      bubbled: keyOf({onCut: true}),
      captured: keyOf({onCutCapture: true})
    }
  },
  doubleClick: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDoubleClick: true}),
      captured: keyOf({onDoubleClickCapture: true})
    }
  },
  drag: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDrag: true}),
      captured: keyOf({onDragCapture: true})
    }
  },
  dragEnd: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragEnd: true}),
      captured: keyOf({onDragEndCapture: true})
    }
  },
  dragEnter: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragEnter: true}),
      captured: keyOf({onDragEnterCapture: true})
    }
  },
  dragExit: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragExit: true}),
      captured: keyOf({onDragExitCapture: true})
    }
  },
  dragLeave: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragLeave: true}),
      captured: keyOf({onDragLeaveCapture: true})
    }
  },
  dragOver: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragOver: true}),
      captured: keyOf({onDragOverCapture: true})
    }
  },
  dragStart: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDragStart: true}),
      captured: keyOf({onDragStartCapture: true})
    }
  },
  drop: {
    phasedRegistrationNames: {
      bubbled: keyOf({onDrop: true}),
      captured: keyOf({onDropCapture: true})
    }
  },
  focus: {
    phasedRegistrationNames: {
      bubbled: keyOf({onFocus: true}),
      captured: keyOf({onFocusCapture: true})
    }
  },
  input: {
    phasedRegistrationNames: {
      bubbled: keyOf({onInput: true}),
      captured: keyOf({onInputCapture: true})
    }
  },
  keyDown: {
    phasedRegistrationNames: {
      bubbled: keyOf({onKeyDown: true}),
      captured: keyOf({onKeyDownCapture: true})
    }
  },
  keyPress: {
    phasedRegistrationNames: {
      bubbled: keyOf({onKeyPress: true}),
      captured: keyOf({onKeyPressCapture: true})
    }
  },
  keyUp: {
    phasedRegistrationNames: {
      bubbled: keyOf({onKeyUp: true}),
      captured: keyOf({onKeyUpCapture: true})
    }
  },
  // Note: We do not allow listening to mouseOver events. Instead, use the
  // onMouseEnter/onMouseLeave created by `EnterLeaveEventPlugin`.
  mouseDown: {
    phasedRegistrationNames: {
      bubbled: keyOf({onMouseDown: true}),
      captured: keyOf({onMouseDownCapture: true})
    }
  },
  mouseMove: {
    phasedRegistrationNames: {
      bubbled: keyOf({onMouseMove: true}),
      captured: keyOf({onMouseMoveCapture: true})
    }
  },
  mouseUp: {
    phasedRegistrationNames: {
      bubbled: keyOf({onMouseUp: true}),
      captured: keyOf({onMouseUpCapture: true})
    }
  },
  paste: {
    phasedRegistrationNames: {
      bubbled: keyOf({onPaste: true}),
      captured: keyOf({onPasteCapture: true})
    }
  },
  scroll: {
    phasedRegistrationNames: {
      bubbled: keyOf({onScroll: true}),
      captured: keyOf({onScrollCapture: true})
    }
  },
  submit: {
    phasedRegistrationNames: {
      bubbled: keyOf({onSubmit: true}),
      captured: keyOf({onSubmitCapture: true})
    }
  },
  touchCancel: {
    phasedRegistrationNames: {
      bubbled: keyOf({onTouchCancel: true}),
      captured: keyOf({onTouchCancelCapture: true})
    }
  },
  touchEnd: {
    phasedRegistrationNames: {
      bubbled: keyOf({onTouchEnd: true}),
      captured: keyOf({onTouchEndCapture: true})
    }
  },
  touchMove: {
    phasedRegistrationNames: {
      bubbled: keyOf({onTouchMove: true}),
      captured: keyOf({onTouchMoveCapture: true})
    }
  },
  touchStart: {
    phasedRegistrationNames: {
      bubbled: keyOf({onTouchStart: true}),
      captured: keyOf({onTouchStartCapture: true})
    }
  },
  wheel: {
    phasedRegistrationNames: {
      bubbled: keyOf({onWheel: true}),
      captured: keyOf({onWheelCapture: true})
    }
  }
};

var topLevelEventsToDispatchConfig = {
  topBlur:        eventTypes.blur,
  topClick:       eventTypes.click,
  topCopy:        eventTypes.copy,
  topCut:         eventTypes.cut,
  topDoubleClick: eventTypes.doubleClick,
  topDrag:        eventTypes.drag,
  topDragEnd:     eventTypes.dragEnd,
  topDragEnter:   eventTypes.dragEnter,
  topDragExit:    eventTypes.dragExit,
  topDragLeave:   eventTypes.dragLeave,
  topDragOver:    eventTypes.dragOver,
  topDragStart:   eventTypes.dragStart,
  topDrop:        eventTypes.drop,
  topFocus:       eventTypes.focus,
  topInput:       eventTypes.input,
  topKeyDown:     eventTypes.keyDown,
  topKeyPress:    eventTypes.keyPress,
  topKeyUp:       eventTypes.keyUp,
  topMouseDown:   eventTypes.mouseDown,
  topMouseMove:   eventTypes.mouseMove,
  topMouseUp:     eventTypes.mouseUp,
  topPaste:       eventTypes.paste,
  topScroll:      eventTypes.scroll,
  topSubmit:      eventTypes.submit,
  topTouchCancel: eventTypes.touchCancel,
  topTouchEnd:    eventTypes.touchEnd,
  topTouchMove:   eventTypes.touchMove,
  topTouchStart:  eventTypes.touchStart,
  topWheel:       eventTypes.wheel
};

var SimpleEventPlugin = {

  eventTypes: eventTypes,

  /**
   * Same as the default implementation, except cancels the event when return
   * value is false.
   *
   * @param {object} Event to be dispatched.
   * @param {function} Application-level callback.
   * @param {string} domID DOM ID to pass to the callback.
   */
  executeDispatch: function(event, listener, domID) {
    var returnValue = listener(event, domID);
    if (returnValue === false) {
      event.stopPropagation();
      event.preventDefault();
    }
  },

  /**
   * @param {string} topLevelType Record from `EventConstants`.
   * @param {DOMEventTarget} topLevelTarget The listening component root node.
   * @param {string} topLevelTargetID ID of `topLevelTarget`.
   * @param {object} nativeEvent Native browser event.
   * @return {*} An accumulation of synthetic events.
   * @see {EventPluginHub.extractEvents}
   */
  extractEvents: function(
      topLevelType,
      topLevelTarget,
      topLevelTargetID,
      nativeEvent) {
    var dispatchConfig = topLevelEventsToDispatchConfig[topLevelType];
    if (!dispatchConfig) {
      return null;
    }
    var EventConstructor;
    switch(topLevelType) {
      case topLevelTypes.topInput:
      case topLevelTypes.topSubmit:
        // HTML Events
        // @see http://www.w3.org/TR/html5/index.html#events-0
        EventConstructor = SyntheticEvent;
        break;
      case topLevelTypes.topKeyDown:
      case topLevelTypes.topKeyPress:
      case topLevelTypes.topKeyUp:
        EventConstructor = SyntheticKeyboardEvent;
        break;
      case topLevelTypes.topBlur:
      case topLevelTypes.topFocus:
        EventConstructor = SyntheticFocusEvent;
        break;
      case topLevelTypes.topClick:
        // Firefox creates a click event on right mouse clicks. This removes the
        // unwanted click events.
        if (nativeEvent.button === 2) {
          return null;
        }
        /* falls through */
      case topLevelTypes.topDoubleClick:
      case topLevelTypes.topDrag:
      case topLevelTypes.topDragEnd:
      case topLevelTypes.topDragEnter:
      case topLevelTypes.topDragExit:
      case topLevelTypes.topDragLeave:
      case topLevelTypes.topDragOver:
      case topLevelTypes.topDragStart:
      case topLevelTypes.topDrop:
      case topLevelTypes.topMouseDown:
      case topLevelTypes.topMouseMove:
      case topLevelTypes.topMouseUp:
        EventConstructor = SyntheticMouseEvent;
        break;
      case topLevelTypes.topTouchCancel:
      case topLevelTypes.topTouchEnd:
      case topLevelTypes.topTouchMove:
      case topLevelTypes.topTouchStart:
        EventConstructor = SyntheticTouchEvent;
        break;
      case topLevelTypes.topScroll:
        EventConstructor = SyntheticUIEvent;
        break;
      case topLevelTypes.topWheel:
        EventConstructor = SyntheticWheelEvent;
        break;
      case topLevelTypes.topCopy:
      case topLevelTypes.topCut:
      case topLevelTypes.topPaste:
        EventConstructor = SyntheticClipboardEvent;
        break;
    }
    invariant(
      EventConstructor,
      'SimpleEventPlugin: Unhandled event type, `%s`.',
      topLevelType
    );
    var event = EventConstructor.getPooled(
      dispatchConfig,
      topLevelTargetID,
      nativeEvent
    );
    EventPropagators.accumulateTwoPhaseDispatches(event);
    return event;
  }

};

module.exports = SimpleEventPlugin;
