---

import { IChartApi, ISeriesApi, SeriesType } from 'lightweight-charts';
import { cloneDeep } from 'lodash-es';
import { BehaviorSubject, Observable, Subscription } from 'rxjs';

import { DOMObject, DOMObjectParams } from '@core/DOMObject';
import { Hotkeys, Keys } from '@core/Hotkeys';

import { DrawingsNames } from '@src/constants';
import { SeriesStrategies } from '@src/modules/series-strategies/SeriesFactory';
import { SettingsTab, SettingsValues, ToolbarSettingField } from '@src/types/settings';

import type { DrawingInteraction, ISeriesDrawing } from '@core/Drawings/common';

type IDrawing = DOMObject;

interface DrawingParams extends DOMObjectParams {
  drawingName: DrawingsNames;
  lwcChart: IChartApi;
  mainSeries: SeriesStrategies;
  onDelete: (id: string) => void;
  onChange: (previousState: unknown, nextState: unknown) => void;
  onCopy: () => void;
  construct: (
    chart: IChartApi,
    series: ISeriesApi<SeriesType>,
    interaction: DrawingInteraction,
  ) => ISeriesDrawing;
  selected$: Observable<boolean>;
  isSelected: () => boolean;
  select: () => void;
  deselect: () => void;
  isLocked?: boolean;
  hotkeys: Hotkeys;
  resetActiveTool: () => void;
}

export class Drawing extends DOMObject implements IDrawing {
  private lwcDrawing: ISeriesDrawing;
  private mainSeries: SeriesStrategies;
  private drawingName: DrawingsNames;
  private hotkeys: Hotkeys;
  private onChange: DrawingParams['onChange'];
  private lockedSubject: BehaviorSubject<boolean>;
  private settingsSubject: BehaviorSubject<SettingsValues>;
  private subscriptions = new Subscription();

  private escapeUnregisterHash: string | null = null;
  private deleteUnregisterHash: string | null = null;
  private copyUnregisterHash: string | null = null;

  constructor({
    lwcChart,
    name,
    mainSeries,
    drawingName,
    id,
    onDelete,
    onChange,
    onCopy,
    zIndex,
    moveUp,
    moveDown,
    construct,
    selected$,
    isSelected,
    select,
    deselect,
    isLocked = false,
    paneId,
    hotkeys,
    resetActiveTool,
  }: DrawingParams) {
    super({
      id,
      name,
      zIndex,
      onDelete,
      moveUp,
      moveDown,
      paneId,
    });

    this.hotkeys = hotkeys;
    this.mainSeries = mainSeries;
    this.drawingName = drawingName;
    this.onChange = onChange;
    this.lockedSubject = new BehaviorSubject(isLocked);

    const interaction: DrawingInteraction = {
      selected$,
      locked$: this.lockedSubject.asObservable(),
      isSelected,
      isLocked: () => this.lockedSubject.value,
      select,
      deselect,
    };

    this.lwcDrawing = construct(lwcChart, mainSeries, interaction);
    this.settingsSubject = new BehaviorSubject(this.lwcDrawing.getSettings());

    this.subscriptions.add(
      this.lwcDrawing.subscribeSettings((settings) => {
        this.settingsSubject.next(settings);
      }),
    );

    this.escapeUnregisterHash = hotkeys.register({
      keys: [Keys.escape],
      callback: () => {
        this.delete();
        resetActiveTool();
      },
    });

    this.subscriptions.add(
      selected$.subscribe((isSelectedDrawing) => {
        if (isSelectedDrawing) {
          this.deleteUnregisterHash = hotkeys.register({
            keys: [Keys.delete],
            callback: () => {
              this.delete();
            },
          });

          this.copyUnregisterHash = hotkeys.register({
            keys: [Keys.mod, Keys.c],
            callback: () => {
              if (!this.isCreationPending()) {
                onCopy();
              }
            },
          });

          return;
        }

        this.unregisterSelectedDrawingHotkeys();
      }),
    );

    this.afterCreation(() => {
      hotkeys.unregister({
        keys: [Keys.escape],
        hash: this.escapeUnregisterHash,
      });

      this.escapeUnregisterHash = null;
    });
  }

  public delete(): void {
    super.delete();
  }

  public getDrawingName(): DrawingsNames {
    return this.drawingName;
  }

  public getLwcDrawing(): ISeriesDrawing {
    return this.lwcDrawing;
  }

  public show(): void {
    this.lwcDrawing.show();
    super.show();
  }

  public hide(): void {
    this.lwcDrawing.hide();
    super.hide();
  }

  public rebind = (nextMainSeries: SeriesStrategies): void => {
    this.lwcDrawing.rebind(nextMainSeries);
    this.mainSeries = nextMainSeries;
  };

  public isCreationPending(): boolean {
    return this.lwcDrawing.isCreationPending();
  }

  public subscribeIsLocked(callback: (isLocked: boolean) => void): Subscription {
    return this.lockedSubject.subscribe(callback);
  }

  public subscribeSettings(callback: (settings: SettingsValues) => void): Subscription {
    return this.settingsSubject.subscribe(callback);
  }

  public isLocked(): boolean {
    return this.lockedSubject.value;
  }

  public setLocked(isLocked: boolean): void {
    if (this.lockedSubject.value === isLocked) {
      return;
    }

    this.lockedSubject.next(isLocked);
  }

  public toggleLock(): void {
    this.setLocked(!this.isLocked());
  }

  public async waitForCreation(): Promise<void> {
    return this.lwcDrawing.waitTillReady();
  }

  public shouldShowInObjectTree(): boolean {
    return this.lwcDrawing.shouldShowInObjectTree();
  }

  public getState(): unknown {
    return this.lwcDrawing.getState();
  }

  public setState(state: unknown): void {
    this.lwcDrawing.setState(state);
    this.settingsSubject.next(this.lwcDrawing.getSettings());
  }

  public getSettings(): SettingsValues {
    return this.lwcDrawing.getSettings();
  }

  public updateSettings(settings: SettingsValues): void {
    const previousState = cloneDeep(this.getState());

    this.lwcDrawing.updateSettings(settings);

    this.onChange(
      previousState,
      cloneDeep(this.getState()),
    );
  }

  public getSettingsTabs(): SettingsTab[] {
    return this.lwcDrawing.getSettingsTabs();
  }

  public getToolbarSettings(): ToolbarSettingField[] {
    return this.getSettingsTabs()
      .flatMap((tab) => tab.fields)
      .filter((field): field is ToolbarSettingField => field.toolbar !== undefined);
  }

  public hasSettings(): boolean {
    return this.getSettingsTabs().some((tab) => tab.fields.length > 0);
  }

  public destroy(): void {
    this.subscriptions.unsubscribe();
    this.unregisterSelectedDrawingHotkeys();

    this.hotkeys.unregister({
      keys: [Keys.escape],
      hash: this.escapeUnregisterHash,
    });

    this.escapeUnregisterHash = null;

    this.lockedSubject.complete();
    this.settingsSubject.complete();

    this.mainSeries.detachPrimitive(this.lwcDrawing);
    this.lwcDrawing.destroy();
  }

  private unregisterSelectedDrawingHotkeys(): void {
    this.hotkeys.unregister({
      keys: [Keys.delete],
      hash: this.deleteUnregisterHash,
    });

    this.hotkeys.unregister({
      keys: [Keys.mod, Keys.c],
      hash: this.copyUnregisterHash,
    });

    this.deleteUnregisterHash = null;
    this.copyUnregisterHash = null;
  }

  private async afterCreation(callback: () => void): Promise<void> {
    await this.lwcDrawing.waitTillReady();
    callback();
  }
}



import { IChartApi, ISeriesApi, SeriesType } from 'lightweight-charts';
import { cloneDeep, isEqual } from 'lodash-es';
import { BehaviorSubject, distinctUntilChanged, map, Observable, Subscription } from 'rxjs';

import { EventManager } from '@core';
import { DOMModel } from '@core/DOMModel';
import { Drawing } from '@core/Drawings';
import { Hotkeys, Keys } from '@core/Hotkeys';

import { EntitySettingsModal } from '@src/components/EntitySettingsModal';
import { drawingLabelById, drawingsMap, DrawingsNames } from '@src/constants';
import { ModalRenderer } from '@src/core/ModalRenderer';
import { SeriesStrategies } from '@src/modules/series-strategies/SeriesFactory';
import { ActiveDrawingTool } from '@src/types';

import type { DrawingInteraction } from '@src/core/Drawings/common';

interface DrawingsManagerParams {
  eventManager: EventManager;
  mainSeries$: Observable<SeriesStrategies | null>;
  lwcChart: IChartApi;
  DOM: DOMModel;
  container: HTMLElement;
  modalRenderer: ModalRenderer;
  paneId: number;
  hotkeys: Hotkeys;
}

export interface DrawingSnapshotItem {
  id: string;
  drawingName: DrawingsNames;
  state: unknown;
  isLocked?: boolean;
  zIndex?: number;
}

interface CreateDrawingOptions {
  id?: string;
  state?: unknown;
  isLocked?: boolean;
  zIndex?: number;
  shouldUpdateDrawingsList?: boolean;
}

export type DrawingsManagerSnapshot = DrawingSnapshotItem[];

export class DrawingsManager {
  private eventManager: EventManager;
  private lwcChart: IChartApi;
  private DOM: DOMModel;
  private container: HTMLElement;
  private modalRenderer: ModalRenderer;

  private mainSeries: SeriesStrategies | null = null;
  private subscriptions = new Subscription();
  private drawings$ = new BehaviorSubject<Drawing[]>([]);
  private selectedDrawing$ = new BehaviorSubject<Drawing | null>(null);
  private activeTool$ = new BehaviorSubject<ActiveDrawingTool>('crosshair');
  private endlessMode$ = new BehaviorSubject(false);
  private recreateScheduled = false;
  private pendingSnapshot: DrawingsManagerSnapshot | null = null;
  private pointerDownSnapshot: DrawingsManagerSnapshot | null = null;
  private paneId: number;

  private hotkeys: Hotkeys;
  private copyPasteBuffer: DrawingSnapshotItem | null = null;
  private escapeUnregisterHash: string | null = null;

  constructor({
    eventManager,
    mainSeries$,
    lwcChart,
    DOM,
    container,
    modalRenderer,
    paneId,
    hotkeys,
  }: DrawingsManagerParams) {
    this.DOM = DOM;
    this.eventManager = eventManager;
    this.paneId = paneId;
    this.lwcChart = lwcChart;
    this.container = container;
    this.modalRenderer = modalRenderer;
    this.hotkeys = hotkeys;

    this.subscriptions.add(
      mainSeries$.subscribe((series) => {
        if (!series) {
          return;
        }

        this.mainSeries = series;
        this.drawings$.value.forEach((drawing) => drawing.rebind(series));

        if (this.pendingSnapshot) {
          const snapshot = this.pendingSnapshot;

          this.pendingSnapshot = null;
          this.setSnapshot(snapshot);
        }
      }),
    );

    window.addEventListener('pointerup', this.handlePointerUp);
    window.addEventListener('pointercancel', this.handlePointerUp);
    this.container.addEventListener('click', this.handleClick);
    this.container.addEventListener('pointerdown', this.handlePointerDown);
    // todo: implement ctrl+v
    // hotkeys.register({
    //   keys: [Keys.control, Keys.v],
    //   callback: () => {
    //     const bufferWithAppliedPosition = {
    //       ...this.copyPasteBuffer,
    //       state: {
    //         ...this.copyPasteBuffer?.state,
    //         startAnchor: {
    //           price: 73.36210252637723,
    //           time: 1783679170
    //         }
    //       }
    //     }
    //
    //     this.setSnapshot([
    //       ...this.getSnapshot(),
    //       bufferWithAppliedPosition
    //     ])
    //     // hotkeys.unregister({ // todo: unregister all else ctrl+c's
    //     //   keys: [Keys.control, Keys.c]
    //     // })
    //   }
    // })
  }

  private handlePointerDown = (): void => {
    this.pointerDownSnapshot = this.getSnapshot();
    this.DOM.refreshEntities();
  };

  private handlePointerUp = (): void => {
    const previousSnapshot = this.pointerDownSnapshot;

    this.pointerDownSnapshot = null;

    queueMicrotask(() => {
      if (!previousSnapshot) {
        return;
      }

      const nextSnapshot = new Map(
        this.getSnapshot().map((drawing) => [
          drawing.id,
          drawing,
        ]),
      );

      this.eventManager.getUndoRedo().group(() => {
        previousSnapshot.forEach((previousDrawing) => {
          const nextDrawing = nextSnapshot.get(previousDrawing.id);

          if (nextDrawing) {
            this.pushDrawingChange(previousDrawing, nextDrawing);
          }
        });
      });
    });

    this.DOM.refreshEntities();
    this.updateActiveTool();
  };

  private handleClick = (): void => {
    this.DOM.refreshEntities();
    this.updateActiveTool();
  };

  private findDrawing(id: string): Drawing | undefined {
    return this.drawings$.value.find((drawing) => drawing.id === id);
  }

  private createDrawingSnapshot(
    drawing: Drawing,
    state: unknown = drawing.getState(),
  ): DrawingSnapshotItem {
    return {
      id: drawing.id,
      drawingName: drawing.getDrawingName(),
      state: cloneDeep(state),
      isLocked: drawing.isLocked(),
      zIndex: drawing.zIndex,
    };
  }

  private pushDrawingChange(
    previousSnapshot: DrawingSnapshotItem | null,
    nextSnapshot: DrawingSnapshotItem | null,
  ): void {
    if (isEqual(previousSnapshot, nextSnapshot)) {
      return;
    }

    const previous = cloneDeep(previousSnapshot);
    const next = cloneDeep(nextSnapshot);

    this.eventManager.getUndoRedo().pushCommand({
      undo: () => {
        this.applyDrawingChange(next, previous);
      },
      redo: () => {
        this.applyDrawingChange(previous, next);
      },
    });
  }

  private applyDrawingChange(
    currentSnapshot: DrawingSnapshotItem | null,
    nextSnapshot: DrawingSnapshotItem | null,
  ): void {
    if (
      currentSnapshot &&
      nextSnapshot &&
      currentSnapshot.id === nextSnapshot.id
    ) {
      const drawing = this.findDrawing(nextSnapshot.id);

      if (drawing) {
        drawing.setState(cloneDeep(nextSnapshot.state));
        drawing.setLocked(nextSnapshot.isLocked ?? false);

        if (nextSnapshot.zIndex !== undefined) {
          drawing.setZIndex(nextSnapshot.zIndex);
        }

        this.drawings$.next(
          [...this.drawings$.value].sort(
            (left, right) => left.zIndex - right.zIndex,
          ),
        );

        this.DOM.refreshEntities();

        return;
      }
    }

    if (currentSnapshot) {
      this.removeDrawingInternal(currentSnapshot.id, false);
    }

    if (nextSnapshot) {
      this.restoreDrawing(nextSnapshot);
    }

    this.activeTool$.next('crosshair');
    this.DOM.refreshEntities();
  }

  private restoreDrawing(snapshot: DrawingSnapshotItem): Drawing {
    const existingDrawing = this.findDrawing(snapshot.id);

    if (existingDrawing) {
      existingDrawing.setState(cloneDeep(snapshot.state));
      existingDrawing.setLocked(snapshot.isLocked ?? false);

      if (snapshot.zIndex !== undefined) {
        existingDrawing.setZIndex(snapshot.zIndex);
      }

      this.DOM.refreshEntities();

      return existingDrawing;
    }

    return this.createDrawing(snapshot.drawingName, {
      id: snapshot.id,
      state: cloneDeep(snapshot.state),
      isLocked: snapshot.isLocked,
      zIndex: snapshot.zIndex,
    });
  }

  private updateActiveTool = (): void => {
    const hasPendingDrawing = this.drawings$.value.some((drawing) => drawing.isCreationPending());

    if (hasPendingDrawing) {
      return;
    }

    const activeTool = this.activeTool$.value;
    const isSingleInstanceTool = activeTool !== 'crosshair' && drawingsMap[activeTool]?.singleInstance;

    if (activeTool !== 'crosshair' && this.endlessMode$.value && !isSingleInstanceTool) {
      if (this.recreateScheduled) {
        return;
      }

      this.recreateScheduled = true;

      queueMicrotask(() => {
        this.recreateScheduled = false;

        const currentTool = this.activeTool$.value;
        const hasPendingAfterTick = this.drawings$.value.some((drawing) => drawing.isCreationPending());

        if (currentTool === 'crosshair') {
          return;
        }

        if (!this.endlessMode$.value) {
          return;
        }

        if (drawingsMap[currentTool]?.singleInstance) {
          return;
        }

        if (hasPendingAfterTick) {
          return;
        }

        void this.addDrawingForce(currentTool);
      });

      return;
    }

    this.activeTool$.next('crosshair');
  };

  private removeDrawing = (id: string): void => {
    const drawing = this.findDrawing(id);

    if (!drawing) {
      return;
    }

    if (drawing.isCreationPending()) {
      this.removeDrawingInternal(id);

      return;
    }

    const snapshot = this.createDrawingSnapshot(drawing);

    this.removeDrawingInternal(id);
    this.pushDrawingChange(snapshot, null);
  };

  private removeDrawingInternal(
    id: string,
    shouldUpdateTool = true,
  ): void {
    const drawing = this.findDrawing(id);

    if (!drawing) {
      return;
    }

    this.removeDrawings([drawing], shouldUpdateTool);
  }

  private removePendingDrawings(shouldUpdateTool = true): void {
    const drawingsToRemove = this.drawings$.value.filter((drawing) => drawing.isCreationPending());

    this.removeDrawings(drawingsToRemove, shouldUpdateTool);
  }

  private removeDrawings(
    drawingsToRemove: Drawing[],
    shouldUpdateTool = true,
  ): void {
    if (!drawingsToRemove.length) {
      return;
    }

    const selectedDrawing = this.selectedDrawing$.value;

    if (
      selectedDrawing &&
      drawingsToRemove.includes(selectedDrawing)
    ) {
      this.selectedDrawing$.next(null);
    }

    drawingsToRemove.forEach((drawing) => {
      drawing.destroy();
      this.DOM.removeEntity(drawing);
    });

    this.drawings$.next(
      this.drawings$.value.filter(
        (drawing) => !drawingsToRemove.includes(drawing),
      ),
    );

    if (shouldUpdateTool) {
      this.updateActiveTool();
    }

    this.DOM.refreshEntities();
  }

  public addDrawingForce = async (name: DrawingsNames): Promise<void> => {
    this.removePendingDrawings(false);

    const previousDrawing = drawingsMap[name].singleInstance
      ? this.drawings$.value.find(
          (drawing) => drawing.getDrawingName() === name,
        )
      : undefined;

    const previousSnapshot = previousDrawing
      ? this.createDrawingSnapshot(previousDrawing)
      : null;

    if (previousDrawing) {
      this.removeDrawingInternal(previousDrawing.id, false);
    }

    this.activeTool$.next(name);

    const drawing = this.createDrawing(name);

    this.DOM.refreshEntities();

    await drawing.waitForCreation();

    if (!this.findDrawing(drawing.id)) {
      if (previousSnapshot) {
        this.restoreDrawing(previousSnapshot);
      }

      return;
    }

    this.pushDrawingChange(
      previousSnapshot,
      this.createDrawingSnapshot(drawing),
    );
  };

  private createDrawing(
    name: DrawingsNames,
    options: CreateDrawingOptions = {},
  ): Drawing {
    if (!this.mainSeries) {
      throw new Error('[Drawings] main series is not defined');
    }

    const {
      id,
      state,
      isLocked = false,
      zIndex,
      shouldUpdateDrawingsList = true,
    } = options;

    const shouldSelectAfterCreation = state === undefined;

    if (
      shouldSelectAfterCreation &&
      this.selectedDrawing$.value
    ) {
      this.selectedDrawing$.next(null);
    }

    const config = drawingsMap[name];
    const drawingId = id ?? crypto.randomUUID();

    let createdDrawing: Drawing | null = null;

    const selected$ = this.selectedDrawing$.pipe(
      map((drawing) => drawing?.id === drawingId),
      distinctUntilChanged(),
    );

    const construct = (
      chart: IChartApi,
      series: ISeriesApi<SeriesType>,
      interaction: DrawingInteraction,
    ) => {
      const paneElement = series.getPane().getHTMLElement();

      if (!paneElement) {
        throw new Error('[Drawing Manager]: cannot place drawing, there is no pane');
      }

      const cells = paneElement.querySelectorAll<HTMLTableCellElement>(':scope > td');
      const canvasElement = cells.item(1);

      return config.construct({
        chart,
        series,
        eventManager: this.eventManager,
        container: canvasElement,
        interaction,
        removeSelf: () => this.removeDrawing(drawingId),
        openSettings: () => {
          if (createdDrawing) {
            this.openSettings(createdDrawing);
          }
        },
      });
    };

    const drawingFactory = (
      entityZIndex: number,
      moveUp: (id: string) => void,
      moveDown: (id: string) => void,
    ) =>
      new Drawing({
        lwcChart: this.lwcChart,
        mainSeries: this.mainSeries as SeriesStrategies,
        id: drawingId,
        drawingName: name,
        name: drawingLabelById()[name],
        onDelete: this.removeDrawing,
        onChange: (previousState, nextState) => {
          if (!createdDrawing) {
            return;
          }

          this.pushDrawingChange(
            this.createDrawingSnapshot(createdDrawing, previousState),
            this.createDrawingSnapshot(createdDrawing, nextState),
          );
        },
        onCopy: () => {
          if (createdDrawing) {
            this.copyPasteBuffer = this.createDrawingSnapshot(createdDrawing);
          }
        },
        zIndex: entityZIndex,
        moveDown,
        moveUp,
        construct,
        selected$,
        isSelected: () => this.selectedDrawing$.value?.id === drawingId,
        select: () => {
          if (
            !createdDrawing ||
            createdDrawing.isCreationPending() ||
            this.selectedDrawing$.value === createdDrawing
          ) {
            return;
          }

          this.selectedDrawing$.next(createdDrawing);
        },
        deselect: () => {
          if (
            !createdDrawing ||
            this.selectedDrawing$.value !== createdDrawing
          ) {
            return;
          }

          this.selectedDrawing$.next(null);
        },
        isLocked,
        paneId: this.paneId,
        hotkeys: this.hotkeys,
        resetActiveTool: () => {
          this.activeTool$.next('crosshair');
        },
      });

    const entity = this.DOM.setEntity<Drawing>(
      drawingFactory,
      zIndex,
    );

    createdDrawing = entity;

    if (state !== undefined) {
      entity.setState(cloneDeep(state));
    }

    if (shouldUpdateDrawingsList) {
      this.drawings$.next(
        [...this.drawings$.value, entity].sort(
          (left, right) => left.zIndex - right.zIndex,
        ),
      );
    }

    if (shouldSelectAfterCreation) {
      entity.waitForCreation().then(() => {
        if (!this.drawings$.value.includes(entity)) {
          return;
        }

        this.selectedDrawing$.next(entity);
        this.updateActiveTool();
        this.DOM.refreshEntities();
      });
    }

    return entity;
  }

  public getSnapshot(): DrawingsManagerSnapshot {
    return this.drawings$.value
      .filter((drawing) => !drawing.isCreationPending())
      .map((drawing) => this.createDrawingSnapshot(drawing));
  }

  public setSnapshot(snapshot: DrawingsManagerSnapshot): void {
    if (!Array.isArray(snapshot)) {
      return;
    }

    if (!this.mainSeries) {
      this.pendingSnapshot = cloneDeep(snapshot);

      return;
    }

    this.pointerDownSnapshot = null;
    this.removeDrawings(this.drawings$.value, false);

    const restoredDrawings = snapshot.reduce<Drawing[]>((drawings, item) => {
      if (!drawingsMap[item.drawingName]) {
        return drawings;
      }

      drawings.push(
        this.createDrawing(item.drawingName, {
          id: item.id,
          state: cloneDeep(item.state),
          isLocked: item.isLocked,
          zIndex: item.zIndex,
          shouldUpdateDrawingsList: false,
        }),
      );

      return drawings;
    }, []);

    this.drawings$.next(
      restoredDrawings.sort(
        (left, right) => left.zIndex - right.zIndex,
      ),
    );

    this.activeTool$.next('crosshair');
    this.DOM.refreshEntities();
  }

  public setEndlessDrawingMode = (value: boolean): void => {
    if (value) {
      this.escapeUnregisterHash = this.hotkeys.register({
        keys: [Keys.escape],
        callback: () => {
          this.setEndlessDrawingMode(false);
        },
      });
    } else {
      this.hotkeys.unregister({
        keys: [Keys.escape],
        hash: this.escapeUnregisterHash,
      });

      this.escapeUnregisterHash = null;
    }

    this.endlessMode$.next(value);
  };

  public isEndlessDrawingsMode(): Observable<boolean> {
    return this.endlessMode$.asObservable();
  }

  public getActiveTool(): Observable<ActiveDrawingTool> {
    return this.activeTool$.asObservable();
  }

  public activateCrosshair(): void {
    this.removePendingDrawings(false);
    this.activeTool$.next('crosshair');
    this.DOM.refreshEntities();
  }

  public entities(): Observable<Drawing[]> {
    return this.drawings$.asObservable();
  }

  public selectedDrawing(): Observable<Drawing | null> {
    return this.selectedDrawing$.asObservable();
  }

  public openSelectedDrawingSettings(): void {
    const drawing = this.selectedDrawing$.value;

    if (!drawing) {
      return;
    }

    this.openSettings(drawing);
  }

  public deleteSelectedDrawing(): void {
    const drawing = this.selectedDrawing$.value;

    if (!drawing) {
      return;
    }

    this.removeDrawing(drawing.id);
  }

  public toggleSelectedDrawingLock(): void {
    const drawing = this.selectedDrawing$.value;

    if (!drawing) {
      return;
    }

    const previousSnapshot = this.createDrawingSnapshot(drawing);

    drawing.toggleLock();

    this.pushDrawingChange(
      previousSnapshot,
      this.createDrawingSnapshot(drawing),
    );
  }

  private openSettings = (drawing: Drawing): void => {
    const tabs = drawing.getSettingsTabs();

    if (!tabs.length || tabs.every((tab) => tab.fields.length === 0)) {
      return;
    }

    let settings = drawing.getSettings();

    this.modalRenderer.renderComponent(
      <EntitySettingsModal
        tabs={tabs}
        values={settings}
        onChange={(nextSettings) => {
          settings = nextSettings;
        }}
        initialTabKey={tabs[0]?.key}
      />,
      {
        size: 'sm',
        title: drawing.name,
        onSave: () => {
          if (this.findDrawing(drawing.id)) {
            drawing.updateSettings(settings);
          }
        },
      },
    );
  };

  public getDrawings(): Drawing[] {
    return this.drawings$.value;
  }

  public hideAll(): void {
    if (this.selectedDrawing$.value) {
      this.selectedDrawing$.next(null);
    }

    this.drawings$.value.forEach((drawing) => drawing.hide());
    this.DOM.refreshEntities();
  }

  public destroy(): void {
    this.hotkeys.unregister({
      keys: [Keys.escape],
      hash: this.escapeUnregisterHash,
    });

    window.removeEventListener('pointerup', this.handlePointerUp);
    window.removeEventListener('pointercancel', this.handlePointerUp);
    this.container.removeEventListener('click', this.handleClick);
    this.container.removeEventListener('pointerdown', this.handlePointerDown);

    this.drawings$.value.forEach((drawing) => drawing.destroy());

    this.pointerDownSnapshot = null;
    this.copyPasteBuffer = null;

    this.subscriptions.unsubscribe();
    this.drawings$.complete();
    this.selectedDrawing$.complete();
    this.activeTool$.complete();
    this.endlessMode$.complete();
  }
}


import { BehaviorSubject, map, Observable } from 'rxjs';

import { DOM } from '@components/DOM';
import { IDOMObject } from '@core/DOMObject';
import { ModalRenderer } from '@core/ModalRenderer';
import { t } from '@src/translations';

interface DOMModelParams {
  modalRenderer: ModalRenderer;
}

/**
 * Абстракция над библиотекой для построения графиков
 */
export class DOMModel {
  // ∈ symbol&pane
  private modalRenderer: ModalRenderer;
  private lastZIndex = 0;

  private entities: BehaviorSubject<IDOMObject[]> = new BehaviorSubject<IDOMObject[]>([]); // drawings/indicators/series
  // private panes: Panes[]; // todo: пока что на каждый пейн будет один objectTree

  constructor({ modalRenderer }: DOMModelParams) {
    this.modalRenderer = modalRenderer;
  }

  public removeEntity = <T extends IDOMObject>(entity: T): void => {
    this.entities.next(this.entities.value.filter((item) => item.id !== entity.id));
  };

  public setEntity = <T extends IDOMObject>(
    callback: (
      zIndex: number,
      moveUp: (id: string) => void,
      moveDown: (id: string) => void,
    ) => T,
    zIndex?: number,
  ): T => {
    const entityZIndex = zIndex ?? this.lastZIndex;

    this.lastZIndex = Math.max(
      this.lastZIndex,
      entityZIndex + 1,
    );

    const entity = callback(
      entityZIndex,
      this.moveUp,
      this.moveDown,
    );

    this.entities.next(
      [...this.entities.value, entity].sort(
        (left, right) => left.zIndex - right.zIndex,
      ),
    );

    return entity;
  };

  private moveUp = (id: string): void => {
    const entities = this.entities.value;
    const current = entities.find((entity) => entity.id === id);

    if (!current) {
      return;
    }

    const next = entities.find((entity) => entity.zIndex === current.zIndex + 1);

    if (!next) {
      return;
    }

    const nextEntities = entities.filter(
      (entity) =>
        entity.id !== id &&
        entity.zIndex !== current.zIndex + 1,
    );

    const currentZIndex = current.zIndex;

    current.setZIndex(next.zIndex);
    next.setZIndex(currentZIndex);

    this.entities.next(
      [...nextEntities, current, next].sort(
        (left, right) => left.zIndex - right.zIndex,
      ),
    );
  };

  private moveDown = (id: string): void => {
    const entities = this.entities.value;
    const current = entities.find((entity) => entity.id === id);

    if (!current) {
      return;
    }

    const previous = entities.find((entity) => entity.zIndex === current.zIndex - 1);

    if (!previous) {
      return;
    }

    const nextEntities = entities.filter(
      (entity) =>
        entity.id !== id &&
        entity.zIndex !== current.zIndex - 1,
    );

    const currentZIndex = current.zIndex;

    current.setZIndex(previous.zIndex);
    previous.setZIndex(currentZIndex);

    this.entities.next(
      [...nextEntities, current, previous].sort(
        (left, right) => left.zIndex - right.zIndex,
      ),
    );
  };

  public getEntities = (): Observable<IDOMObject[]> => {
    return this.entities.pipe(
      map((entities) =>
        entities.filter((entity) =>
          entity.shouldShowInObjectTree(),
        ),
      ),
    );
  };

  public refreshEntities = (): void => {
    this.entities.next(
      [...this.entities.value].sort(
        (left, right) => left.zIndex - right.zIndex,
      ),
    );
  };

  public toggleDOM = () => {
    this.modalRenderer.renderComponent(
      <DOM elementsObs={this.getEntities()} />,
      {
        title: t('DOM tree'),
        onSave: () => console.warn('dom state saved'),
        acceptLabel: '',
        rejectLabel: '',
      },
    );
  };

  public destroy(): void {
    // todo implement
  }
}

import classNames from 'classnames';
import { Button, Tooltip } from 'exchange-elements/v2';
import { useEffect, useLayoutEffect, useRef, useState } from 'react';

import { GearIcon, LockIcon, LockOpenIcon, TrashIcon } from '@src/components/Icon';
import { ToolbarColorControl } from '@src/components/ToolbarColorControl';
import { t } from '@src/translations';

import styles from './index.module.scss';

import type { Drawing } from '@core/Drawings';
import type { SettingsValues } from '@src/types/settings';
import type { PointerEvent, SyntheticEvent } from 'react';
import type { Observable } from 'rxjs';

interface FloatingDrawingToolbarProps {
  selectedDrawing$: Observable<Drawing | null>;
  onToggleLock: () => void;
  onOpenSettings: () => void;
  onDelete: () => void;
}

interface Position {
  x: number;
  y: number;
}

interface DragState {
  pointerId: number;
  startX: number;
  startY: number;
  initialX: number;
  initialY: number;
}

const TOOLBAR_TOP_OFFSET = 12;

export function FloatingDrawingToolbar({
  selectedDrawing$,
  onToggleLock,
  onOpenSettings,
  onDelete,
}: FloatingDrawingToolbarProps) {
  const toolbarRef = useRef<HTMLDivElement | null>(null);
  const dragStateRef = useRef<DragState | null>(null);
  const positionRef = useRef<Position | null>(null);

  const [selectedDrawing, setSelectedDrawing] = useState<Drawing | null>(null);
  const [settings, setSettings] = useState<SettingsValues>({});
  const [isLocked, setIsLocked] = useState(false);
  const [isDragging, setIsDragging] = useState(false);
  const [position, setPosition] = useState<Position | null>(null);

  const shouldShowToolbar = selectedDrawing?.hasSettings() ?? false;

  useEffect(() => {
    const subscription = selectedDrawing$.subscribe(setSelectedDrawing);

    return () => {
      subscription.unsubscribe();
    };
  }, [selectedDrawing$]);

  useEffect(() => {
    if (!selectedDrawing || !shouldShowToolbar) {
      setIsLocked(false);

      return;
    }

    const subscription = selectedDrawing.subscribeIsLocked(setIsLocked);

    return () => {
      subscription.unsubscribe();
    };
  }, [selectedDrawing, shouldShowToolbar]);

  useEffect(() => {
    if (!selectedDrawing || !shouldShowToolbar) {
      setSettings({});

      return;
    }

    const subscription = selectedDrawing.subscribeSettings(setSettings);

    return () => {
      subscription.unsubscribe();
    };
  }, [selectedDrawing, shouldShowToolbar]);

  useLayoutEffect(() => {
    if (!selectedDrawing || !shouldShowToolbar) {
      return;
    }

    const toolbar = toolbarRef.current;
    const container = toolbar?.parentElement;

    if (!toolbar || !container) {
      return;
    }

    const currentPosition = positionRef.current;

    if (currentPosition) {
      updatePosition(
        clampPosition(
          currentPosition.x,
          currentPosition.y,
          toolbar,
          container,
        ),
      );

      return;
    }

    updatePosition({
      x: Math.round(
        (container.clientWidth - toolbar.offsetWidth) / 2,
      ),
      y: TOOLBAR_TOP_OFFSET,
    });
  }, [selectedDrawing, shouldShowToolbar]);

  const handleDragStart = (
    event: PointerEvent<HTMLButtonElement>,
  ): void => {
    const currentPosition = positionRef.current;

    if (event.button !== 0 || !currentPosition) {
      return;
    }

    event.preventDefault();
    event.currentTarget.setPointerCapture(event.pointerId);

    dragStateRef.current = {
      pointerId: event.pointerId,
      startX: event.clientX,
      startY: event.clientY,
      initialX: currentPosition.x,
      initialY: currentPosition.y,
    };

    setIsDragging(true);
  };

  const handleDrag = (
    event: PointerEvent<HTMLButtonElement>,
  ): void => {
    const dragState = dragStateRef.current;
    const toolbar = toolbarRef.current;
    const container = toolbar?.parentElement;

    if (
      !dragState ||
      dragState.pointerId !== event.pointerId ||
      !toolbar ||
      !container
    ) {
      return;
    }

    event.preventDefault();

    updatePosition(
      clampPosition(
        dragState.initialX + event.clientX - dragState.startX,
        dragState.initialY + event.clientY - dragState.startY,
        toolbar,
        container,
      ),
    );
  };

  const handleDragEnd = (
    event: PointerEvent<HTMLButtonElement>,
  ): void => {
    if (dragStateRef.current?.pointerId !== event.pointerId) {
      return;
    }

    if (event.currentTarget.hasPointerCapture(event.pointerId)) {
      event.currentTarget.releasePointerCapture(event.pointerId);
    }

    dragStateRef.current = null;
    setIsDragging(false);
  };

  const stopPropagation = (event: SyntheticEvent): void => {
    event.stopPropagation();
  };

  function updatePosition(nextPosition: Position): void {
    positionRef.current = nextPosition;

    setPosition((currentPosition) => {
      if (
        currentPosition?.x === nextPosition.x &&
        currentPosition.y === nextPosition.y
      ) {
        return currentPosition;
      }

      return nextPosition;
    });
  }

  if (!selectedDrawing || !shouldShowToolbar) {
    return null;
  }

  const toolbarSettings = selectedDrawing.getToolbarSettings();
  const lockLabel = isLocked ? t('Unlock') : t('Lock');

  return (
    <div
      ref={toolbarRef}
      className={styles.toolbar}
      style={{
        visibility: position ? 'visible' : 'hidden',
        transform: `translate3d(${position?.x ?? 0}px, ${position?.y ?? 0}px, 0)`,
      }}
      onPointerDown={stopPropagation}
      onClick={stopPropagation}
      onDoubleClick={stopPropagation}
      onContextMenu={stopPropagation}
    >
      <button
        type="button"
        className={classNames(styles.toolbar_handle, {
          [styles.dragging]: isDragging,
        })}
        onPointerDown={handleDragStart}
        onPointerMove={handleDrag}
        onPointerUp={handleDragEnd}
        onPointerCancel={handleDragEnd}
      >
        <span />
        <span />
        <span />
        <span />
        <span />
        <span />
      </button>

      {toolbarSettings.map((field) => {
        if (
          field.type !== 'color' ||
          field.toolbar.control !== 'color'
        ) {
          return null;
        }

        return (
          <ToolbarColorControl
            key={field.key}
            role={field.toolbar.role}
            value={String(
              settings[field.key] ??
                field.defaultValue,
            )}
            onChange={(value) => {
              selectedDrawing.updateSettings({
                [field.key]: value,
              });
            }}
          />
        );
      })}

      <Tooltip
        tooltipClassName={styles.toolbar_tooltip}
        showMessageOnFocus
        label={t('Settings')}
        location="top"
      >
        <Button
          size="sm"
          className={styles.button}
          onClick={onOpenSettings}
          label={<GearIcon />}
        />
      </Tooltip>

      <Tooltip
        tooltipClassName={styles.toolbar_tooltip}
        showMessageOnFocus
        label={lockLabel}
        location="top"
      >
        <Button
          size="sm"
          className={classNames(styles.button, {
            [styles.pressed]: isLocked,
          })}
          onClick={onToggleLock}
          label={isLocked ? <LockIcon /> : <LockOpenIcon />}
        />
      </Tooltip>

      <Tooltip
        tooltipClassName={styles.toolbar_tooltip}
        showMessageOnFocus
        label={t('Remove')}
        location="top"
      >
        <Button
          size="sm"
          className={styles.button}
          onClick={onDelete}
          label={<TrashIcon />}
        />
      </Tooltip>
    </div>
  );
}

function clampPosition(
  x: number,
  y: number,
  toolbar: HTMLElement,
  container: HTMLElement,
): Position {
  return {
    x: Math.max(
      0,
      Math.min(
        Math.round(x),
        container.clientWidth - toolbar.offsetWidth,
      ),
    ),
    y: Math.max(
      0,
      Math.min(
        Math.round(y),
        container.clientHeight - toolbar.offsetHeight,
      ),
    ),
  };
}

export enum Keys {
  'escape' = 'escape',
  'delete' = 'delete',
  'tab' = 'tab',
  'shift' = 'shift',
  'control' = 'control',
  'meta' = 'meta',
  'mod' = 'mod',
  'alt' = 'alt',
  't' = 'keyt',
  'h' = 'keyh',
  'v' = 'keyv',
  'f' = 'keyf',
  'z' = 'keyz',
  'y' = 'keyy',
  'c' = 'keyc',
  'mousedown' = 'mousedown',
}

type HotkeyCallback = () => void | Promise<void>;

interface RegisterHotkeyParams {
  keys: Keys[];
  callback: HotkeyCallback;
}

interface UnregisterHotkeyParams {
  keys: Keys[];
  hash?: string | null;
}

interface HotkeyRegistration {
  keys: Keys[];
  callback: HotkeyCallback;
}

export interface IHotkeys {
  register(params: RegisterHotkeyParams): string | null;
  unregister(params: UnregisterHotkeyParams): void;
}

// todo: возможно можно сделать синглтоном и использовать импортируя эк земпляр класса,
//  там где это нужно вместо props drilling, как сейчас

export class Hotkeys implements IHotkeys {
  private registrations = new Map<string, HotkeyRegistration>();

  constructor() {
    document.addEventListener('keydown', this.handleKeyDown);
  }

  public register({
    keys,
    callback,
  }: RegisterHotkeyParams): string | null {
    if (keys.length === 0) {
      console.error('[Hotkeys] попытка задать пустой хоткей');

      return null;
    }

    const hash = `hotkeyCallback-${crypto.randomUUID()}`;

    this.registrations.set(hash, {
      keys,
      callback,
    });

    return hash;
  }

  public unregister({
    hash,
  }: UnregisterHotkeyParams): void {
    if (!hash) {
      return;
    }

    this.registrations.delete(hash);
  }

  public destroy(): void {
    document.removeEventListener('keydown', this.handleKeyDown);
    this.registrations.clear();
  }

  private handleKeyDown = async (
    event: KeyboardEvent,
  ): Promise<void> => {
    if (
      event.repeat ||
      isEditableElement(event.target)
    ) {
      return;
    }

    const callbacks = [...this.registrations.values()]
      .filter(({ keys }) => matchesHotkey(event, keys))
      .map(({ callback }) => callback)
      .reverse();

    if (callbacks.length === 0) {
      return;
    }

    event.preventDefault();

    for (const callback of callbacks) {
      // eslint-disable-next-line no-await-in-loop
      await callback();
    }
  };
}

function matchesHotkey(
  event: KeyboardEvent,
  keys: Keys[],
): boolean {
  const eventKey = normalizeCode(event.code);
  const primaryKeys = keys.filter(
    (key) => !isModifier(key),
  );

  if (
    primaryKeys.length !== 1 ||
    primaryKeys[0] !== eventKey
  ) {
    return false;
  }

  if (keys.includes(Keys.mod)) {
    if (!event.ctrlKey && !event.metaKey) {
      return false;
    }
  } else if (
    event.ctrlKey !== keys.includes(Keys.control) ||
    event.metaKey !== keys.includes(Keys.meta)
  ) {
    return false;
  }

  return (
    event.shiftKey === keys.includes(Keys.shift) &&
    event.altKey === keys.includes(Keys.alt)
  );
}

function isModifier(key: Keys): boolean {
  return (
    key === Keys.mod ||
    key === Keys.control ||
    key === Keys.meta ||
    key === Keys.shift ||
    key === Keys.alt
  );
}

function normalizeCode(code: string): Keys {
  switch (code.toLowerCase()) {
    case 'controlleft':
    case 'controlright':
      return Keys.control;

    case 'metaleft':
    case 'metaright':
      return Keys.meta;

    case 'shiftleft':
    case 'shiftright':
      return Keys.shift;

    case 'altleft':
    case 'altright':
      return Keys.alt;

    default:
      return code.toLowerCase() as Keys;
  }
}

function isEditableElement(
  target: EventTarget | null,
): boolean {
  if (!(target instanceof HTMLElement)) {
    return false;
  }

  return (
    target.isContentEditable ||
    target.closest(
      'input, textarea, select, [contenteditable]',
    ) !== null
  );
}


const drawingsManager = this.chart.getDrawingsManager();

this.drawingToolbarRenderer.renderComponent(
  <FloatingDrawingToolbar
    selectedDrawing$={drawingsManager.selectedDrawing()}
    onToggleLock={() => drawingsManager.toggleSelectedDrawingLock()}
    onOpenSettings={() => drawingsManager.openSelectedDrawingSettings()}
    onDelete={() => drawingsManager.deleteSelectedDrawing()}
  />,
);


this.hotkeys = new Hotkeys();

if (config.chartCollectionPreset.undoRedoEnabled) {
  const undoRedo = this.eventManager.getUndoRedo();

  this.hotkeys.register({
    keys: [Keys.mod, Keys.z],
    callback: undoRedo.undo,
  });

  this.hotkeys.register({
    keys: [Keys.mod, Keys.shift, Keys.z],
    callback: undoRedo.redo,
  });

  this.hotkeys.register({
    keys: [Keys.mod, Keys.y],
    callback: undoRedo.redo,
  });
}

this.modalRenderer = new ModalRenderer(modalContainer);