import * as React from 'react'

import { unregisterEvents, applyUpdatersToPropsAndRegisterEvents } from '../../utils/helper'

import MapContext from '../../map-context'

const eventMap = {
  onCenterChanged: 'center_changed',
  onClick: 'click',
  onDblClick: 'dblclick',
  onDrag: 'drag',
  onDragEnd: 'dragend',
  onDragStart: 'dragstart',
  onMouseDown: 'mousedown',
  onMouseMove: 'mousemove',
  onMouseOut: 'mouseout',
  onMouseOver: 'mouseover',
  onMouseUp: 'mouseup',
  onRadiusChanged: 'radius_changed',
  onRightClick: 'rightclick',
}

const updaterMap = {
  center(instance: google.maps.Circle, center: google.maps.LatLng): void {
    instance.setCenter(center)
  },
  draggable(instance: google.maps.Circle, draggable: boolean): void {
    instance.setDraggable(draggable)
  },
  editable(instance: google.maps.Circle, editable: boolean): void {
    instance.setEditable(editable)
  },
  map(instance: google.maps.Circle, map: google.maps.Map): void {
    instance.setMap(map)
  },
  options(instance: google.maps.Circle, options: google.maps.CircleOptions): void {
    instance.setOptions(options)
  },
  radius(instance: google.maps.Circle, radius: number): void {
    instance.setRadius(radius)
  },
  visible(instance: google.maps.Circle, visible: boolean): void {
    instance.setVisible(visible)
  },
}

interface CircleState {
  circle: google.maps.Circle | null
}

export interface CircleProps {
  options?: google.maps.CircleOptions

  // required
  /** sets the center of the circle */
  center: google.maps.LatLng | google.maps.LatLngLiteral

  // required
  /** Sets the radius of this circle (in meters) */
  radius: number
  /** If set to true, the user can drag this circle over the map */
  draggable?: boolean
  /** If set to true, the user can edit this circle by dragging the control points shown at the center and around the circumference of the circle. */
  editable?: boolean
  /** Hides this circle if set to false. */
  visible?: boolean
  /** This event is fired when the DOM dblclick event is fired on the circle. */
  onDblClick?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the user stops dragging the circle. */
  onDragEnd?: (e: google.maps.MouseEvent) => void
  /**  This event is fired when the user starts dragging the circle. */
  onDragStart?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the DOM mousedown event is fired on the circle. */
  onMouseDown?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the DOM mousemove event is fired on the circle. */
  onMouseMove?: (e: google.maps.MouseEvent) => void
  /** This event is fired on circle mouseout. */
  onMouseOut?: (e: google.maps.MouseEvent) => void
  /** This event is fired on circle mouseover. */
  onMouseOver?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the DOM mouseup event is fired on the circle. */
  onMouseUp?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the circle is right-clicked on. */
  onRightClick?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the circle's center is changed. */
  onCenterChanged?: () => void
  /** This event is fired when the DOM click event is fired on the circle. */
  onClick?: (e: google.maps.MouseEvent) => void
  /** This event is repeatedly fired while the user drags the circle. */
  onDrag?: (e: google.maps.MouseEvent) => void
  /** This event is fired when the circle's radius is changed. */
  onRadiusChanged?: () => void
  /** This callback is called when the circle instance has loaded. It is called with the circle instance. */
  onLoad?: (circle: google.maps.Circle) => void
  /** This callback is called when the component unmounts. It is called with the circle instance. */
  onUnmount?: (circle: google.maps.Circle) => void
}

export class Circle extends React.PureComponent<CircleProps, CircleState> {
  static contextType = MapContext

  registeredEvents: google.maps.MapsEventListener[] = []

  state: CircleState = {
    circle: null,
  }

  setCircleCallback = (): void => {
    if (this.state.circle !== null && this.props.onLoad) {
      this.props.onLoad(this.state.circle)
    }
  }

  componentDidMount(): void {
    const circle = new google.maps.Circle({
      ...(this.props.options || {}),
      map: this.context,
    })

    this.registeredEvents = applyUpdatersToPropsAndRegisterEvents({
      updaterMap,
      eventMap,
      prevProps: {},
      nextProps: this.props,
      instance: circle,
    })

    this.setState(function setCircle() {
      return {
        circle,
      }
    }, this.setCircleCallback)
  }

  componentDidUpdate(prevProps: CircleProps): void {
    if (this.state.circle !== null) {
      unregisterEvents(this.registeredEvents)

      this.registeredEvents = applyUpdatersToPropsAndRegisterEvents({
        updaterMap,
        eventMap,
        prevProps,
        nextProps: this.props,
        instance: this.state.circle,
      })
    }
  }

  componentWillUnmount(): void {
    if (this.state.circle !== null) {
      if (this.props.onUnmount) {
        this.props.onUnmount(this.state.circle)
      }

      unregisterEvents(this.registeredEvents)

      this.state.circle && this.state.circle.setMap(null)
    }
  }

  render(): JSX.Element {
    return <></>
  }
}

export default Circle