import { observable, action, makeObservable } from 'mobx';
import { Gestures } from '../../pen-gestures/GestureTypes';

export enum freeformScrollMode {
    Pan = 'pan',
    Zoom = 'zoom',
}
export class SnappingManager {
    // eslint-disable-next-line no-use-before-define
    private static _manager: SnappingManager;
    private static get Instance() {
        return SnappingManager._manager ?? new SnappingManager();
    }

    @observable _longPress = false;
    @observable _shiftKey = false;
    @observable _ctrlKey = false;
    @observable _metaKey = false;
    @observable _hideUI = false;
    @observable _showPresPaths = false;
    @observable _isLinkFollowing = false;
    @observable _isDragging: boolean = false;
    @observable _isResizing: string | undefined = undefined; // the string is the Id of the document being resized
    @observable _canEmbed: boolean = false;
    @observable _horizSnapLines: number[] = [];
    @observable _vertSnapLines: number[] = [];
    @observable _exploreMode = false;
    @observable _userPanned = false;
    @observable _serverVersion: string = '';
    @observable _lastBtnId: string = '';
    @observable _propertyWid: number = 0;
    @observable _printToConsole: boolean = false;
    @observable _hideDecorations: boolean = false;
    @observable _keepGestureMode: boolean = false; // for whether primitive selection enters a one-shot or persistent mode
    @observable _inkShape: Gestures | undefined = undefined;
    @observable _chatVisible: boolean = false;
    @observable _userBackgroundColor: string | undefined = undefined;
    @observable _userVariantColor: string | undefined = undefined;
    @observable _userColor: string | undefined = undefined;

    private constructor() {
        SnappingManager._manager = this;
        makeObservable(this);
    }

    @action public static clearSnapLines = () => {
        this.Instance._vertSnapLines.length = this.Instance._horizSnapLines.length = 0;
    };
    @action public static addSnapLines = (horizLines: number[], vertLines: number[]) => {
        this.Instance._horizSnapLines.push(...horizLines);
        this.Instance._vertSnapLines.push(...vertLines);
    };

    public static get userBackgroundColor() { return this.Instance._userBackgroundColor; } // prettier-ignore
    public static get userVariantColor() { return this.Instance._userVariantColor; } // prettier-ignore
    public static get userColor()      { return this.Instance._userColor; } // prettier-ignore
    public static get HorizSnapLines() { return this.Instance._horizSnapLines; } // prettier-ignore
    public static get VertSnapLines()  { return this.Instance._vertSnapLines; } // prettier-ignore
    public static get LongPress()      { return this.Instance._longPress; } // prettier-ignore
    public static get ShiftKey()       { return this.Instance._shiftKey; } // prettier-ignore
    public static get CtrlKey()        { return this.Instance._ctrlKey; } // prettier-ignore
    public static get MetaKey()        { return this.Instance._metaKey; } // prettier-ignore
    public static get HideUI()         { return this.Instance._hideUI; } // prettier-ignore
    public static get ShowPresPaths()  { return this.Instance._showPresPaths; } // prettier-ignore
    public static get IsLinkFollowing(){ return this.Instance._isLinkFollowing; } // prettier-ignore
    public static get IsDragging()     { return this.Instance._isDragging; } // prettier-ignore
    public static get IsResizing()     { return this.Instance._isResizing; } // prettier-ignore
    public static get CanEmbed()       { return this.Instance._canEmbed; } // prettier-ignore
    public static get ExploreMode()    { return this.Instance._exploreMode; } // prettier-ignore
    public static get UserPanned()     { return this.Instance._userPanned; } // prettier-ignore
    public static get ServerVersion()  { return this.Instance._serverVersion; } // prettier-ignore
    public static get LastPressedBtn() { return this.Instance._lastBtnId; } // prettier-ignore
    public static get PropertiesWidth(){ return this.Instance._propertyWid; } // prettier-ignore
    public static get PrintToConsole() { return this.Instance._printToConsole; } // prettier-ignore
    public static get HideDecorations(){ return this.Instance._hideDecorations; } // prettier-ignore
    public static get KeepGestureMode(){ return this.Instance._keepGestureMode; } // prettier-ignore
    public static get InkShape()       { return this.Instance._inkShape; } // prettier-ignore
    public static get ChatVisible()    { return this.Instance._chatVisible; } // prettier-ignore

    public static SetUserBackgroundColor = action((color: string) => (this.Instance._userBackgroundColor = color)); // prettier-ignore
    public static SetUserVariantColor    = action((color: string) => (this.Instance._userVariantColor = color)); // prettier-ignore
    public static SetUserColor           = action((color: string) => (this.Instance._userColor = color)); // prettier-ignore
    public static SetLongPress           = action((press: boolean)=> (this.Instance._longPress = press)); // prettier-ignore
    public static SetShiftKey            = action((down: boolean) => (this.Instance._shiftKey = down)); // prettier-ignore
    public static SetCtrlKey             = action((down: boolean) => (this.Instance._ctrlKey = down)); // prettier-ignore
    public static SetMetaKey             = action((down: boolean) => (this.Instance._metaKey = down)); // prettier-ignore
    public static SetHideUI              = action((vis: boolean)  => (this.Instance._hideUI = vis)); // prettier-ignore
    public static SetShowPresPaths       = action((paths:boolean) => (this.Instance._showPresPaths = paths)); // prettier-ignore
    public static SetIsLinkFollowing     = action((follow:boolean)=> (this.Instance._isLinkFollowing = follow)); // prettier-ignore
    public static SetIsDragging          = action((drag: boolean) => (this.Instance._isDragging = drag)); // prettier-ignore
    public static SetIsResizing          = action((docid?:string) => (this.Instance._isResizing = docid)); // prettier-ignore
    public static SetCanEmbed            = action((embed:boolean) => (this.Instance._canEmbed = embed)); // prettier-ignore
    public static SetExploreMode         = action((state:boolean) => (this.Instance._exploreMode = state)); // prettier-ignore
    public static TriggerUserPanned      = action(()              => (this.Instance._userPanned = !this.Instance._userPanned)); // prettier-ignore
    public static SetServerVersion       = action((version:string)=> (this.Instance._serverVersion = version)); // prettier-ignore
    public static SetLastPressedBtn      = action((id:string)     => (this.Instance._lastBtnId = id)); // prettier-ignore
    public static SetPropertiesWidth     = action((wid:number)    => (this.Instance._propertyWid = wid)); // prettier-ignore
    public static SetPrintToConsole      = action((state:boolean) => (this.Instance._printToConsole = state)); // prettier-ignore
    public static SetHideDecorations     = action((state:boolean) => (this.Instance._hideDecorations = state)); // prettier-ignore
    public static SetKeepGestureMode     = action((state:boolean) => (this.Instance._keepGestureMode = state)); // prettier-ignore
    public static SetInkShape            = action((shape?:Gestures)=>(this.Instance._inkShape = shape)); // prettier-ignore
    public static SetChatVisible         = action((vis:boolean)   => (this.Instance._chatVisible = vis)); // prettier-ignore

    public static SettingsStyle: CSSStyleSheet | null;
}