---

import { Observable } from 'rxjs';

import {
  CustomPriceAxisPaneView,
  CustomPriceAxisView,
  CustomTimeAxisPaneView,
  CustomTimeAxisView,
} from '@core/Drawings/axis';
import { SeriesDrawingBase } from '@core/Drawings/common';
import {
  clamp,
  clampPointToContainer as clampPointToContainerInElement,
  getAnchorFromPoint,
  getContainerSize as getElementContainerSize,
  getXCoordinateFromTime,
  getYCoordinateFromPrice,
  isNearPoint,
  isPointInBounds,
} from '@core/Drawings/helpers';
import { updateViews } from '@core/Drawings/utils';

import { getThemeStore } from '@src/theme';
import { t } from '@src/translations';
import { Defaults } from '@src/types/defaults';
import { formatPercent, formatPrice, formatSignedNumber, formatVolume } from '@src/utils';
import { formatDate } from '@src/utils/formatter';

import { DiapsonPaneView } from './paneView';

import {
  createDefaultSettings,
  DiapsonSettings,
  DiapsonStyle,
  DiapsonTextStyle,
  getDiapsonSettingsTabs,
} from './settings';

import type { DrawingInteraction, ISeriesDrawing } from '@core/Drawings/common';
import type { Anchor, AxisLabel, AxisSegment, Point, SeriesApi } from '@core/Drawings/types';
import type { ChartOptionsModel, SettingsTab } from '@src/types';
import type { IChartApi, IPrimitivePaneView, PrimitiveHoveredItem, Time, UTCTimestamp } from 'lightweight-charts';

export type DiapsonRangeMode = 'date' | 'price';

type DiapsonMode = 'idle' | 'drawing' | 'ready' | 'dragging';
type DiapsonHandle = 'body' | 'start' | 'end' | null;
type TimeLabelKind = 'left' | 'right';
type PriceLabelKind = 'top' | 'bottom';

interface DiapsonParams {
  container: HTMLElement;
  interaction: DrawingInteraction;
  rangeMode: DiapsonRangeMode;
  formatObservable?: Observable<ChartOptionsModel>;
  removeSelf?: () => void;
  openSettings?: () => void;
  stepSize?: number;
  stepLabel?: string;
}

export interface DiapsonState {
  hidden: boolean;
  mode: DiapsonMode;
  rangeMode: DiapsonRangeMode;
  startTime: Time | null;
  endTime: Time | null;
  startPrice: number | null;
  endPrice: number | null;
  settings: DiapsonSettings;
}

interface DiapsonGeometry {
  left: number;
  right: number;
  top: number;
  bottom: number;
  width: number;
  height: number;
  startPoint: Point;
  endPoint: Point;
}

export interface DiapsonRenderData extends DiapsonGeometry, DiapsonStyle, DiapsonTextStyle {
  rangeMode: DiapsonRangeMode;
  showFill: boolean;
  showHandles: boolean;
  labelLines: string[];
}

interface DateMetrics {
  barsCount: number;
  elapsedText: string;
  volumeText: string;
}

interface PriceMetrics {
  delta: number;
  percent: number;
  steps: number;
}

const HANDLE_HIT_TOLERANCE = 8;
const BODY_HIT_TOLERANCE = 6;
const MIN_RECTANGLE_WIDTH = 6;
const MIN_RECTANGLE_HEIGHT = 6;

export class Diapson extends SeriesDrawingBase<DiapsonSettings> implements ISeriesDrawing {
  private removeSelf?: () => void;
  private openSettings?: () => void;

  protected settings: DiapsonSettings = createDefaultSettings();

  protected mode: DiapsonMode = 'idle';
  private rangeMode: DiapsonRangeMode;

  private startTime: Time | null = null;
  private endTime: Time | null = null;
  private startPrice: number | null = null;
  private endPrice: number | null = null;

  private activeDragTarget: DiapsonHandle = null;
  private dragPointerId: number | null = null;
  private dragStartPoint: Point | null = null;
  private dragGeometrySnapshot: DiapsonGeometry | null = null;

  private displayFormat: ChartOptionsModel = {
    dateFormat: Defaults.dateFormat,
    timeFormat: Defaults.timeFormat,
    showTime: Defaults.showTime,
  };

  private readonly stepSize: number;
  private readonly stepLabel: string;

  private readonly paneView: DiapsonPaneView;
  private readonly timeAxisPaneView: CustomTimeAxisPaneView;
  private readonly priceAxisPaneView: CustomPriceAxisPaneView;
  private readonly leftTimeAxisView: CustomTimeAxisView;
  private readonly rightTimeAxisView: CustomTimeAxisView;
  private readonly topPriceAxisView: CustomPriceAxisView;
  private readonly bottomPriceAxisView: CustomPriceAxisView;

  constructor(chart: IChartApi, series: SeriesApi, params: DiapsonParams) {
    super({
      chart,
      series,
      container: params.container,
      interaction: params.interaction,
    });

    const { rangeMode, formatObservable, removeSelf, openSettings, stepSize = 1, stepLabel = '' } = params;

    this.rangeMode = rangeMode;
    this.removeSelf = removeSelf;
    this.openSettings = openSettings;
    this.stepSize = stepSize > 0 ? stepSize : 1;
    this.stepLabel = stepLabel;

    this.paneView = new DiapsonPaneView(this);

    this.timeAxisPaneView = new CustomTimeAxisPaneView({
      getAxisSegments: () => this.getTimeAxisSegments(),
    });

    this.priceAxisPaneView = new CustomPriceAxisPaneView({
      getAxisSegments: () => this.getPriceAxisSegments(),
    });

    this.leftTimeAxisView = new CustomTimeAxisView({
      getAxisLabel: (kind) => this.getTimeAxisLabel(kind),
      labelKind: 'left',
    });

    this.rightTimeAxisView = new CustomTimeAxisView({
      getAxisLabel: (kind) => this.getTimeAxisLabel(kind),
      labelKind: 'right',
    });

    this.topPriceAxisView = new CustomPriceAxisView({
      getAxisLabel: (kind) => this.getPriceAxisLabel(kind),
      labelKind: 'top',
    });

    this.bottomPriceAxisView = new CustomPriceAxisView({
      getAxisLabel: (kind) => this.getPriceAxisLabel(kind),
      labelKind: 'bottom',
    });

    if (formatObservable) {
      this.subscriptions.add(
        formatObservable.subscribe((format) => {
          this.displayFormat = format;
          this.render();
        }),
      );
    }

    this.series.attachPrimitive(this);
  }

  public isCreationPending(): boolean {
    return this.mode === 'idle' || this.mode === 'drawing';
  }

  public setRangeMode(nextMode: DiapsonRangeMode): void {
    if (this.rangeMode === nextMode) {
      return;
    }

    this.rangeMode = nextMode;
    this.resetToIdle();
  }

  public getState(): DiapsonState {
    return {
      hidden: this.hidden,
      mode: this.mode,
      rangeMode: this.rangeMode,
      startTime: this.startTime,
      endTime: this.endTime,
      startPrice: this.startPrice,
      endPrice: this.endPrice,
      settings: { ...this.settings },
    };
  }

  public setState(state: unknown): void {
    if (!state || typeof state !== 'object') {
      return;
    }

    const nextState = state as Partial<DiapsonState>;

    this.hidden = typeof nextState.hidden === 'boolean' ? nextState.hidden : this.hidden;
    this.mode = nextState.mode ?? this.mode;
    this.rangeMode = nextState.rangeMode ?? this.rangeMode;
    this.startTime = 'startTime' in nextState ? (nextState.startTime ?? null) : this.startTime;
    this.endTime = 'endTime' in nextState ? (nextState.endTime ?? null) : this.endTime;
    this.startPrice = 'startPrice' in nextState ? (nextState.startPrice ?? null) : this.startPrice;
    this.endPrice = 'endPrice' in nextState ? (nextState.endPrice ?? null) : this.endPrice;

    if ('settings' in nextState && nextState.settings) {
      this.settings = {
        ...createDefaultSettings(),
        ...nextState.settings,
      };
    }

    this.render();
  }

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

  public updateAllViews(): void {
    updateViews([
      this.paneView,
      this.timeAxisPaneView,
      this.priceAxisPaneView,
      this.leftTimeAxisView,
      this.rightTimeAxisView,
      this.topPriceAxisView,
      this.bottomPriceAxisView,
    ]);
  }

  public paneViews(): readonly IPrimitivePaneView[] {
    return [this.paneView];
  }

  public timeAxisPaneViews(): readonly IPrimitivePaneView[] {
    return [this.timeAxisPaneView];
  }

  public priceAxisPaneViews(): readonly IPrimitivePaneView[] {
    return [this.priceAxisPaneView];
  }

  public timeAxisViews() {
    return [this.leftTimeAxisView, this.rightTimeAxisView];
  }

  public priceAxisViews() {
    return [this.topPriceAxisView, this.bottomPriceAxisView];
  }

  public getRenderData(): DiapsonRenderData | null {
    if (this.hidden) {
      return null;
    }

    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    return {
      ...geometry,
      rangeMode: this.rangeMode,
      showFill: true,
      showHandles: this.shouldShowHandles(),
      labelLines: this.getLabelLines(),
      ...this.settings,
    };
  }

  protected getTimeAxisSegments(): AxisSegment[] {
    if (!this.isSelected() && !this.isCreationPending()) {
      return [];
    }

    const bounds = this.getTimeBounds();

    if (!bounds) {
      return [];
    }

    const { colors } = getThemeStore();

    return [
      {
        from: bounds.left,
        to: bounds.right,
        color: colors.axisMarkerAreaFill,
      },
    ];
  }

  protected getPriceAxisSegments(): AxisSegment[] {
    if (!this.isSelected() && !this.isCreationPending()) {
      return [];
    }

    const bounds = this.getPriceBounds();

    if (!bounds) {
      return [];
    }

    const { colors } = getThemeStore();

    return [
      {
        from: bounds.top,
        to: bounds.bottom,
        color: colors.axisMarkerAreaFill,
      },
    ];
  }

  protected getTimeAxisLabel(kind: string): AxisLabel | null {
    if ((!this.isSelected() && !this.isCreationPending()) || (kind !== 'left' && kind !== 'right')) {
      return null;
    }

    const labelKind = kind as TimeLabelKind;
    const coordinate = this.getTimeCoordinate(labelKind);
    const text = this.getTimeText(labelKind);

    if (coordinate === null || !text) {
      return null;
    }

    const { colors } = getThemeStore();

    return {
      coordinate,
      text,
      textColor: colors.chartPriceLineText,
      backgroundColor: colors.axisMarkerLabelFill,
    };
  }

  protected getPriceAxisLabel(kind: string): AxisLabel | null {
    if ((!this.isSelected() && !this.isCreationPending()) || (kind !== 'top' && kind !== 'bottom')) {
      return null;
    }

    const labelKind = kind as PriceLabelKind;
    const coordinate = this.getPriceCoordinate(labelKind);
    const text = this.getPriceText(labelKind);

    if (coordinate === null || !text) {
      return null;
    }

    const { colors } = getThemeStore();

    return {
      coordinate,
      text,
      textColor: colors.chartPriceLineText,
      backgroundColor: colors.axisMarkerLabelFill,
    };
  }

  protected getHoveredItem(x: number, y: number): PrimitiveHoveredItem | null {
    if (this.hidden || this.mode === 'idle' || this.mode === 'drawing') {
      return null;
    }

    const point = { x, y };

    if (!this.isSelected()) {
      if (!this.containsPoint(point)) {
        return null;
      }

      return {
        cursorStyle: 'move',
        externalId: `diapson-${this.rangeMode}`,
        zOrder: 'top',
      };
    }

    const handleTarget = this.getHandleTarget(point);

    if (handleTarget) {
      return {
        cursorStyle: this.getCursorStyle(handleTarget),
        externalId: `diapson-${this.rangeMode}`,
        zOrder: 'top',
      };
    }

    if (!this.containsPoint(point)) {
      return null;
    }

    return {
      cursorStyle: 'move',
      externalId: `diapson-${this.rangeMode}`,
      zOrder: 'top',
    };
  }

  protected handleDoubleClick = (event: MouseEvent): void => {
    if (this.hidden || this.mode !== 'ready') {
      return;
    }

    const point = this.getEventPoint(event as PointerEvent);

    if (!this.getHandleTarget(point) && !this.containsPoint(point)) {
      return;
    }

    event.preventDefault();
    event.stopPropagation();

    this.openSettings?.();
  };

  protected handlePointerDown = (event: PointerEvent): void => {
    if (this.hidden || event.button !== 0) {
      return;
    }

    const point = this.getEventPoint(event);

    if (this.mode === 'idle') {
      event.preventDefault();
      event.stopPropagation();

      this.startDrawing(point);
      return;
    }

    if (this.mode === 'drawing') {
      event.preventDefault();
      event.stopPropagation();

      this.updateDrawing(point);
      this.finishDrawing();
      return;
    }

    if (this.mode !== 'ready') {
      return;
    }

    if (!this.isSelected()) {
      if (!this.containsPoint(point)) {
        return;
      }

      event.preventDefault();
      event.stopPropagation();

      this.select();
      return;
    }

    const dragTarget = this.getDragTarget(point);

    if (!dragTarget) {
      this.deselect();
      return;
    }

    event.preventDefault();
    event.stopPropagation();

    this.startDragging(point, event.pointerId, dragTarget);
  };

  protected handlePointerMove = (event: PointerEvent): void => {
    const point = this.getEventPoint(event);

    if (this.mode === 'drawing') {
      this.updateDrawing(point);
      return;
    }

    if (this.mode !== 'dragging' || this.dragPointerId !== event.pointerId) {
      return;
    }

    event.preventDefault();

    if (this.activeDragTarget === 'body') {
      this.moveWhole(point);
      this.render();
      return;
    }

    this.resizeRectangle(point);
    this.render();
  };

  protected handlePointerUp = (event: PointerEvent): void => {
    if (this.mode !== 'dragging' || this.dragPointerId !== event.pointerId) {
      return;
    }

    this.finishDragging();
  };

  private startDrawing(point: Point): void {
    const anchor = this.createAnchor(this.clampPointToContainer(point));

    if (!anchor) {
      return;
    }

    this.startTime = anchor.time;
    this.endTime = anchor.time;
    this.startPrice = anchor.price;
    this.endPrice = anchor.price;

    this.mode = 'drawing';
    this.render();
  }

  private updateDrawing(point: Point): void {
    const anchor = this.createAnchor(this.clampPointToContainer(point));

    if (!anchor) {
      return;
    }

    this.endTime = anchor.time;
    this.endPrice = anchor.price;

    this.render();
  }

  private finishDrawing(): void {
    const geometry = this.getGeometry();

    if (!geometry) {
      this.resetToIdle();
      return;
    }

    if (geometry.width < MIN_RECTANGLE_WIDTH || geometry.height < MIN_RECTANGLE_HEIGHT) {
      if (this.removeSelf) {
        this.removeSelf();
        return;
      }

      this.resetToIdle();
      return;
    }

    this.mode = 'ready';
    this.resolveReady?.();

    this.render();
  }

  private startDragging(point: Point, pointerId: number, dragTarget: Exclude<DiapsonHandle, null>): void {
    this.mode = 'dragging';
    this.activeDragTarget = dragTarget;
    this.dragPointerId = pointerId;
    this.dragStartPoint = point;
    this.dragGeometrySnapshot = this.getGeometry();

    this.render();
  }

  private finishDragging(): void {
    this.mode = 'ready';
    this.resolveReady?.();

    this.clearInteractionState();
    this.render();
  }

  private clearInteractionState(): void {
    this.activeDragTarget = null;
    this.dragPointerId = null;
    this.dragStartPoint = null;
    this.dragGeometrySnapshot = null;
  }

  private resetToIdle(): void {
    this.hidden = false;
    this.deselect();
    this.mode = 'idle';
    this.startTime = null;
    this.endTime = null;
    this.startPrice = null;
    this.endPrice = null;
    this.clearInteractionState();
    this.render();
  }

  private getDragTarget(point: Point): Exclude<DiapsonHandle, null> | null {
    const handleTarget = this.getHandleTarget(point);

    if (handleTarget) {
      return handleTarget;
    }

    if (this.containsPoint(point)) {
      return 'body';
    }

    return null;
  }

  private moveWhole(point: Point): void {
    const geometry = this.dragGeometrySnapshot;
    const { dragStartPoint } = this;

    if (!geometry || !dragStartPoint) {
      return;
    }

    const { width, height } = this.getContainerSize();

    const rawOffsetX = point.x - dragStartPoint.x;
    const rawOffsetY = point.y - dragStartPoint.y;

    const offsetX = clamp(rawOffsetX, -geometry.left, width - geometry.right);
    const offsetY = clamp(rawOffsetY, -geometry.top, height - geometry.bottom);

    const nextStartPoint = this.clampPointToContainer({
      x: geometry.startPoint.x + offsetX,
      y: geometry.startPoint.y + offsetY,
    });

    const nextEndPoint = this.clampPointToContainer({
      x: geometry.endPoint.x + offsetX,
      y: geometry.endPoint.y + offsetY,
    });

    this.setAnchorsFromPoints(nextStartPoint, nextEndPoint);
  }

  private resizeRectangle(point: Point): void {
    const geometry = this.dragGeometrySnapshot;

    if (!geometry || !this.activeDragTarget || this.activeDragTarget === 'body') {
      return;
    }

    const nextPoint = this.clampPointToContainer(point);

    if (this.activeDragTarget === 'start') {
      this.setAnchorsFromPoints(nextPoint, geometry.endPoint);
      return;
    }

    this.setAnchorsFromPoints(geometry.startPoint, nextPoint);
  }

  private setAnchorsFromPoints(startPoint: Point, endPoint: Point): void {
    const startAnchor = this.createAnchor(startPoint);
    const endAnchor = this.createAnchor(endPoint);

    if (!startAnchor || !endAnchor) {
      return;
    }

    this.startTime = startAnchor.time;
    this.startPrice = startAnchor.price;
    this.endTime = endAnchor.time;
    this.endPrice = endAnchor.price;
  }

  private createAnchor(point: Point): Anchor | null {
    return getAnchorFromPoint(this.chart, this.series, point);
  }

  protected getGeometry(): DiapsonGeometry | null {
    if (this.startTime === null || this.endTime === null || this.startPrice === null || this.endPrice === null) {
      return null;
    }

    const startX = getXCoordinateFromTime(this.chart, this.startTime, this.series);
    const endX = getXCoordinateFromTime(this.chart, this.endTime, this.series);
    const startY = getYCoordinateFromPrice(this.series, this.startPrice);
    const endY = getYCoordinateFromPrice(this.series, this.endPrice);

    if (startX === null || endX === null || startY === null || endY === null) {
      return null;
    }

    const { width, height } = this.getContainerSize();

    const startPoint = {
      x: clamp(Math.round(Number(startX)), 0, width),
      y: clamp(Math.round(Number(startY)), 0, height),
    };

    const endPoint = {
      x: clamp(Math.round(Number(endX)), 0, width),
      y: clamp(Math.round(Number(endY)), 0, height),
    };

    const left = Math.round(Math.min(startPoint.x, endPoint.x));
    const right = Math.round(Math.max(startPoint.x, endPoint.x));
    const top = Math.round(Math.min(startPoint.y, endPoint.y));
    const bottom = Math.round(Math.max(startPoint.y, endPoint.y));

    return {
      left,
      right,
      top,
      bottom,
      width: right - left,
      height: bottom - top,
      startPoint,
      endPoint,
    };
  }

  private getLabelLines(): string[] {
    if (this.rangeMode === 'date') {
      const metrics = this.getDateMetrics();

      if (!metrics) {
        return [];
      }

      const firstLine = metrics.elapsedText
        ? `${metrics.barsCount} ${t('bars')}, ${metrics.elapsedText}`
        : `${metrics.barsCount} ${t('bars')}`;

      if (!metrics.volumeText) {
        return [firstLine];
      }

      return [firstLine, `${t('Vol')} ${metrics.volumeText}`];
    }

    const metrics = this.getPriceMetrics();

    if (!metrics) {
      return [];
    }

    const percentText =
      metrics.percent < 0 ? `-${formatPercent(Math.abs(metrics.percent))}` : formatPercent(Math.abs(metrics.percent));

    const absSteps = Math.abs(metrics.steps);
    let stepsText = '';

    if (Number.isInteger(absSteps)) {
      stepsText = absSteps.toString();
    } else if (absSteps >= 1000) {
      stepsText = absSteps.toFixed(0);
    } else if (absSteps >= 100) {
      stepsText = absSteps.toFixed(1);
    } else {
      stepsText = absSteps.toFixed(2);
    }

    if (metrics.steps < 0) {
      stepsText = `-${stepsText}`;
    }

    const stepSuffix = this.stepLabel ? ` ${this.stepLabel}` : '';

    return [`${formatSignedNumber(metrics.delta)} (${percentText}) ${stepsText}${stepSuffix}`];
  }

  private getDateMetrics(): DateMetrics | null {
    const leftTime = this.getLeftTimeValue();
    const rightTime = this.getRightTimeValue();

    if (!leftTime || !rightTime) {
      return null;
    }

    const barsCount = this.getBarsCount();
    const durationSeconds = Math.max(0, Math.floor(Math.abs(Number(rightTime) - Number(leftTime))));
    const days = Math.floor(durationSeconds / 86400);
    const hours = Math.floor((durationSeconds % 86400) / 3600);
    const minutes = Math.floor((durationSeconds % 3600) / 60);
    const seconds = durationSeconds % 60;

    const elapsedParts: string[] = [];

    if (days > 0) {
      elapsedParts.push(`${days}d`);
    }

    if (hours > 0) {
      elapsedParts.push(`${hours}h`);
    }

    if (minutes > 0) {
      elapsedParts.push(`${minutes}m`);
    }

    if (elapsedParts.length === 0) {
      elapsedParts.push(`${seconds}s`);
    }

    const volume = this.getVolumeInRange();

    return {
      barsCount,
      elapsedText: elapsedParts.slice(0, 2).join(' '),
      volumeText: volume > 0 ? formatVolume(volume) : '',
    };
  }

  private getPriceMetrics(): PriceMetrics | null {
    if (this.startPrice === null || this.endPrice === null) {
      return null;
    }

    const delta = this.endPrice - this.startPrice;

    return {
      delta,
      percent: this.startPrice !== 0 ? (delta / Math.abs(this.startPrice)) * 100 : 0,
      steps: delta / this.stepSize,
    };
  }

  private getBarsCount(): number {
    if (this.startTime === null || this.endTime === null) {
      return 0;
    }

    const startIndex = this.findIndexByTime(this.startTime);
    const endIndex = this.findIndexByTime(this.endTime);

    if (startIndex < 0 || endIndex < 0) {
      return 0;
    }

    return Math.abs(endIndex - startIndex);
  }

  private getVolumeInRange(): number {
    if (this.startTime === null || this.endTime === null) {
      return 0;
    }

    const data = this.series.data() ?? [];

    if (!data.length) {
      return 0;
    }

    const startIndex = this.findIndexByTime(this.startTime);
    const endIndex = this.findIndexByTime(this.endTime);

    if (startIndex < 0 || endIndex < 0) {
      return 0;
    }

    const from = Math.min(startIndex, endIndex);
    const to = Math.max(startIndex, endIndex);

    let volume = 0;

    for (let index = from; index <= to; index += 1) {
      const item = data[index] as unknown as Record<string, unknown> | undefined;

      if (!item) {
        continue;
      }

      if (typeof item.volume === 'number') {
        volume += item.volume;
        continue;
      }

      const customValues = item.customValues as Record<string, unknown> | undefined;

      if (customValues && typeof customValues.volume === 'number') {
        volume += customValues.volume;
      }
    }

    return volume;
  }

  private findIndexByTime(time: Time): number {
    const data = this.series.data() ?? [];

    return data.findIndex((item) => Number(item.time) === Number(time));
  }

  private getTimeBounds(): { left: number; right: number } | null {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    return {
      left: geometry.left,
      right: geometry.right,
    };
  }

  private getPriceBounds(): { top: number; bottom: number } | null {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    return {
      top: geometry.top,
      bottom: geometry.bottom,
    };
  }

  private getTimeCoordinate(kind: TimeLabelKind): number | null {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    return kind === 'left' ? geometry.left : geometry.right;
  }

  private getPriceCoordinate(kind: PriceLabelKind): number | null {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    return kind === 'top' ? geometry.top : geometry.bottom;
  }

  private getTimeText(kind: TimeLabelKind): string {
    const time = kind === 'left' ? this.getLeftTimeValue() : this.getRightTimeValue();

    if (!time) {
      return '';
    }

    return formatDate(
      time as UTCTimestamp,
      this.displayFormat.dateFormat,
      this.displayFormat.timeFormat,
      this.displayFormat.showTime,
    );
  }

  private getPriceText(kind: PriceLabelKind): string {
    const price = kind === 'top' ? this.getTopPriceValue() : this.getBottomPriceValue();

    if (price === null) {
      return '';
    }

    return formatPrice(price) ?? '';
  }

  private getLeftTimeValue(): Time | null {
    if (this.startTime === null || this.endTime === null) {
      return null;
    }

    const startX = getXCoordinateFromTime(this.chart, this.startTime, this.series);
    const endX = getXCoordinateFromTime(this.chart, this.endTime, this.series);

    if (startX === null || endX === null) {
      return this.startTime;
    }

    return Number(startX) <= Number(endX) ? this.startTime : this.endTime;
  }

  private getRightTimeValue(): Time | null {
    if (this.startTime === null || this.endTime === null) {
      return null;
    }

    const startX = getXCoordinateFromTime(this.chart, this.startTime, this.series);
    const endX = getXCoordinateFromTime(this.chart, this.endTime, this.series);

    if (startX === null || endX === null) {
      return this.endTime;
    }

    return Number(startX) <= Number(endX) ? this.endTime : this.startTime;
  }

  private getTopPriceValue(): number | null {
    if (this.startPrice === null || this.endPrice === null) {
      return null;
    }

    const startY = getYCoordinateFromPrice(this.series, this.startPrice);
    const endY = getYCoordinateFromPrice(this.series, this.endPrice);

    if (startY === null || endY === null) {
      return Math.max(this.startPrice, this.endPrice);
    }

    return Number(startY) <= Number(endY) ? this.startPrice : this.endPrice;
  }

  private getBottomPriceValue(): number | null {
    if (this.startPrice === null || this.endPrice === null) {
      return null;
    }

    const startY = getYCoordinateFromPrice(this.series, this.startPrice);
    const endY = getYCoordinateFromPrice(this.series, this.endPrice);

    if (startY === null || endY === null) {
      return Math.min(this.startPrice, this.endPrice);
    }

    return Number(startY) <= Number(endY) ? this.endPrice : this.startPrice;
  }

  private getHandleTarget(point: Point): Exclude<DiapsonHandle, 'body' | null> | null {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    if (isNearPoint(point, geometry.startPoint.x, geometry.startPoint.y, HANDLE_HIT_TOLERANCE)) {
      return 'start';
    }

    if (isNearPoint(point, geometry.endPoint.x, geometry.endPoint.y, HANDLE_HIT_TOLERANCE)) {
      return 'end';
    }

    return null;
  }

  private containsPoint(point: Point): boolean {
    const geometry = this.getGeometry();

    if (!geometry) {
      return false;
    }

    return isPointInBounds(point, geometry, BODY_HIT_TOLERANCE);
  }

  private getCursorStyle(handle: Exclude<DiapsonHandle, null>): PrimitiveHoveredItem['cursorStyle'] {
    if (handle === 'body') {
      return 'move';
    }

    const geometry = this.getGeometry();

    if (!geometry) {
      return 'default';
    }

    const sameDirection =
      (geometry.endPoint.x - geometry.startPoint.x >= 0 && geometry.endPoint.y - geometry.startPoint.y >= 0) ||
      (geometry.endPoint.x - geometry.startPoint.x < 0 && geometry.endPoint.y - geometry.startPoint.y < 0);

    return sameDirection ? 'nwse-resize' : 'nesw-resize';
  }

  private getContainerSize(): { width: number; height: number } {
    return getElementContainerSize(this.container);
  }

  private clampPointToContainer(point: Point): Point {
    return clampPointToContainerInElement(point, this.container);
  }
}