// Copyright Epic Games, Inc. All Rights Reserved.

import { MouseController } from './MouseController';
import { Logger } from '../Logger/Logger';
import { IMouseEvents } from './IMouseEvents';

/**
 * Video Player mouse Hover handler
 */
export class HoveringMouseEvents implements IMouseEvents {
    mouseController: MouseController;

    /**
     * @param mouseController - Mouse Controller instance
     */
    constructor(mouseController: MouseController) {
        this.mouseController = mouseController;
    }

    /**
     * Unregister event handlers
     */
    unregisterMouseEvents(): void {
        // empty for HoveringMouseEvents implementation
    }

    /**
     * Handle the mouse move event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    updateMouseMovePosition(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        Logger.Log(Logger.GetStackTrace(), 'MouseMove', 6);
        const coord =
            this.mouseController.coordinateConverter.normalizeAndQuantizeUnsigned(
                mouseEvent.offsetX,
                mouseEvent.offsetY
            );
        const delta =
            this.mouseController.coordinateConverter.normalizeAndQuantizeSigned(
                mouseEvent.movementX,
                mouseEvent.movementY
            );
        const toStreamerHandlers =
            this.mouseController.toStreamerMessagesProvider.toStreamerHandlers;
        toStreamerHandlers.get('MouseMove')([
            coord.x,
            coord.y,
            delta.x,
            delta.y
        ]);
        mouseEvent.preventDefault();
    }

    /**
     * Handle the mouse Down event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    handleMouseDown(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        Logger.Log(Logger.GetStackTrace(), 'onMouse Down', 6);
        const coord =
            this.mouseController.coordinateConverter.normalizeAndQuantizeUnsigned(
                mouseEvent.offsetX,
                mouseEvent.offsetY
            );
        const toStreamerHandlers =
            this.mouseController.toStreamerMessagesProvider.toStreamerHandlers;
        toStreamerHandlers.get('MouseDown')([
            mouseEvent.button,
            coord.x,
            coord.y
        ]);
        mouseEvent.preventDefault();
    }

    /**
     * Handle the mouse Up event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    handleMouseUp(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        Logger.Log(Logger.GetStackTrace(), 'onMouse Up', 6);
        const coord =
            this.mouseController.coordinateConverter.normalizeAndQuantizeUnsigned(
                mouseEvent.offsetX,
                mouseEvent.offsetY
            );
        const toStreamerHandlers =
            this.mouseController.toStreamerMessagesProvider.toStreamerHandlers;
        toStreamerHandlers.get('MouseUp')([
            mouseEvent.button,
            coord.x,
            coord.y
        ]);
        mouseEvent.preventDefault();
    }

    /**
     * Consumes the mouse context event. The UE instance has no equivalent and doesn't need to be informed.
     * @param mouseEvent - Mouse Event
     */
    handleContextMenu(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        mouseEvent.preventDefault();
    }

    /**
     * Handle the mouse wheel event, sends the mouse wheel data to the UE Instance
     * @param wheelEvent - Mouse Event
     */
    handleMouseWheel(wheelEvent: WheelEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        const coord =
            this.mouseController.coordinateConverter.normalizeAndQuantizeUnsigned(
                wheelEvent.offsetX,
                wheelEvent.offsetY
            );
        const toStreamerHandlers =
            this.mouseController.toStreamerMessagesProvider.toStreamerHandlers;
        toStreamerHandlers.get('MouseWheel')([
            wheelEvent.wheelDelta,
            coord.x,
            coord.y
        ]);
        wheelEvent.preventDefault();
    }

    /**
     * Handle the mouse double click event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    handleMouseDouble(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        const coord =
            this.mouseController.coordinateConverter.normalizeAndQuantizeUnsigned(
                mouseEvent.offsetX,
                mouseEvent.offsetY
            );
        const toStreamerHandlers =
            this.mouseController.toStreamerMessagesProvider.toStreamerHandlers;
        toStreamerHandlers.get('MouseDouble')([
            mouseEvent.button,
            coord.x,
            coord.y
        ]);
    }

    /**
     * Handle the press mouse buttons event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    handlePressMouseButtons(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        Logger.Log(Logger.GetStackTrace(), 'onMouse press', 6);
        this.mouseController.pressMouseButtons(
            mouseEvent.buttons,
            mouseEvent.offsetX,
            mouseEvent.offsetY
        );
    }

    /**
     * Handle the release mouse buttons event, sends the mouse data to the UE Instance
     * @param mouseEvent - Mouse Event
     */
    handleReleaseMouseButtons(mouseEvent: MouseEvent) {
        if (!this.mouseController.videoElementProvider.isVideoReady()) {
            return;
        }
        Logger.Log(Logger.GetStackTrace(), 'onMouse release', 6);
        this.mouseController.releaseMouseButtons(
            mouseEvent.buttons,
            mouseEvent.offsetX,
            mouseEvent.offsetY
        );
    }
}