---

import { Observable, skip } from 'rxjs';

import {
  CustomPriceAxisPaneView,
  CustomPriceAxisView,
  CustomTimeAxisPaneView,
  CustomTimeAxisView,
} from '@core/Drawings/axis';
import { SeriesDrawingBase } from '@core/Drawings/common';
import {
  getPriceDelta as getPriceDeltaFromCoordinates,
  getPriceFromYCoordinate,
  getPriceRangeInContainer,
  getTimeFromXCoordinate,
  getXCoordinateFromTime,
  getYCoordinateFromPrice,
  isNearPoint,
  isPointInBounds,
  shiftTimeByPixels,
} 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 } from '@src/utils';
import { formatDate } from '@src/utils/formatter';

import { SliderPaneView } from './paneView';

import {
  createDefaultSettings,
  getSliderPositionSettingsTabs,
  SliderPositionSettings,
  SliderPositionStyle,
  SliderPositionTextStyle,
} from './settings';

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

type SliderSide = 'long' | 'short';
type SliderMode = 'idle' | 'ready' | 'dragging';
type DragTarget = 'body' | 'entry' | 'target' | 'stop' | 'end' | null;
type TimeLabelKind = 'start' | 'end';
type PriceLabelKind = 'target' | 'entry' | 'stop';

interface SliderPositionParams {
  side: SliderSide;
  container: HTMLElement;
  interaction: DrawingInteraction;
  formatObservable?: Observable<ChartOptionsModel>;
  resetTriggers?: Observable<unknown>[];
  removeSelf?: () => void;
  openSettings?: () => void;
}

interface SliderPositionState {
  hidden: boolean;
  mode: SliderMode;
  startTime: Time | null;
  endTime: Time | null;
  entryPrice: number | null;
  stopPrice: number | null;
  targetPrice: number | null;
  riskRewardRatio: number;
  amount: number;
  tickSize: number;
  settings: SliderPositionSettings;
}

interface SliderGeometry {
  startX: number;
  endX: number;
  leftX: number;
  rightX: number;
  entryY: number;
  stopY: number;
  targetY: number;
  entryPrice: number;
  stopPrice: number;
  targetPrice: number;
  profitTop: number;
  profitBottom: number;
  lossTop: number;
  lossBottom: number;
}

export interface SliderRenderData extends SliderGeometry, SliderPositionStyle, SliderPositionTextStyle {
  targetText: string;
  centerText: string;
  stopText: string;
  centerBoxColor: string;
  showFill: boolean;
  showHandles: boolean;
  showLabels: boolean;
}

const HIT_TOLERANCE = 8;
const INITIAL_WIDTH_PX = 160;
const MIN_DISTANCE = 0.00000001;

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

  protected settings: SliderPositionSettings = createDefaultSettings();

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

  protected mode: SliderMode = 'idle';

  private side: SliderSide;

  private startTime: Time | null = null;
  private endTime: Time | null = null;
  private entryPrice: number | null = null;
  private stopPrice: number | null = null;
  private targetPrice: number | null = null;

  private activeDragTarget: DragTarget = null;
  private dragPointerId: number | null = null;
  private dragStartPoint: Point | null = null;
  private dragStateSnapshot: SliderPositionState | null = null;

  private defaultRiskRewardRatio = 1;
  private amount = 1000;
  private tickSize = 1;

  private clickHandler: MouseEventHandler<Time>;
  private paneView: SliderPaneView;
  private timeAxisPaneView: CustomTimeAxisPaneView;
  private priceAxisPaneView: CustomPriceAxisPaneView;
  private startTimeAxisView: CustomTimeAxisView;
  private endTimeAxisView: CustomTimeAxisView;
  private targetPriceAxisView: CustomPriceAxisView;
  private entryPriceAxisView: CustomPriceAxisView;
  private stopPriceAxisView: CustomPriceAxisView;

  constructor(
    chart: IChartApi,
    series: SeriesApi,
    {
      side,
      container,
      interaction,
      formatObservable,
      resetTriggers = [],
      removeSelf,
      openSettings,
    }: SliderPositionParams,
  ) {
    super({
      chart,
      series,
      container,
      interaction,
    });

    this.side = side;
    this.removeSelf = removeSelf;
    this.openSettings = openSettings;

    this.clickHandler = (params) => this.handleChartClick(params);

    this.paneView = new SliderPaneView(this);

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

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

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

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

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

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

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

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

    resetTriggers.forEach((trigger) => {
      this.subscriptions.add(
        trigger.pipe(skip(1)).subscribe(() => {
          this.removeSelf?.();
        }),
      );
    });

    this.series.attachPrimitive(this);
  }

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

  public getState(): SliderPositionState {
    return {
      hidden: this.hidden,
      mode: this.mode,
      startTime: this.startTime,
      endTime: this.endTime,
      entryPrice: this.entryPrice,
      stopPrice: this.stopPrice,
      targetPrice: this.targetPrice,
      riskRewardRatio: this.getCurrentRiskRewardRatio(),
      amount: this.amount,
      tickSize: this.tickSize,
      settings: { ...this.settings },
    };
  }

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

    const next = state as Partial<SliderPositionState>;

    this.hidden = next.hidden ?? this.hidden;
    this.mode = next.mode ?? this.mode;

    this.startTime = next.startTime ?? this.startTime;
    this.endTime = next.endTime ?? this.endTime;
    this.entryPrice = next.entryPrice ?? this.entryPrice;
    this.stopPrice = next.stopPrice ?? this.stopPrice;
    this.amount = next.amount ?? this.amount;

    if (typeof next.tickSize === 'number' && next.tickSize > 0) {
      this.tickSize = next.tickSize;
    }

    if (next.targetPrice !== undefined) {
      this.targetPrice = next.targetPrice;
    } else if (
      this.entryPrice !== null &&
      this.stopPrice !== null &&
      typeof next.riskRewardRatio === 'number' &&
      next.riskRewardRatio > 0
    ) {
      const risk = Math.abs(this.entryPrice - this.stopPrice);

      this.targetPrice =
        this.side === 'long'
          ? this.entryPrice + risk * next.riskRewardRatio
          : this.entryPrice - risk * next.riskRewardRatio;
    }

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

    this.render();
  }

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

  public updateAllViews(): void {
    updateViews([
      this.paneView,
      this.timeAxisPaneView,
      this.priceAxisPaneView,
      this.startTimeAxisView,
      this.endTimeAxisView,
      this.targetPriceAxisView,
      this.entryPriceAxisView,
      this.stopPriceAxisView,
    ]);
  }

  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.startTimeAxisView, this.endTimeAxisView];
  }

  public priceAxisViews() {
    return [this.targetPriceAxisView, this.entryPriceAxisView, this.stopPriceAxisView];
  }

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

    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    const reward = Math.abs(geometry.targetPrice - geometry.entryPrice);
    const qty = reward > 0 ? this.amount / reward : 0;

    const selectedPrice = this.getPriceAtTime(this.endTime);
    const pnl =
      selectedPrice === null
        ? 0
        : this.side === 'long'
          ? (selectedPrice - geometry.entryPrice) * qty
          : (geometry.entryPrice - selectedPrice) * qty;

    const { colors } = getThemeStore();

    return {
      ...geometry,
      targetText: this.getTargetText(geometry),
      centerText: this.getCenterText(qty, pnl),
      stopText: this.getStopText(geometry),
      centerBoxColor: pnl >= 0 ? colors.chartCandleUp : colors.chartCandleDown,
      showFill: true,
      showHandles: this.shouldShowHandles(),
      showLabels: this.isSelected(),
      ...this.settings,
    };
  }

  public getTimeBounds(): { left: number; right: number } | null {
    const start = this.getTimeCoordinate('start');
    const end = this.getTimeCoordinate('end');

    if (start === null || end === null) {
      return null;
    }

    return {
      left: Math.min(start, end),
      right: Math.max(start, end),
    };
  }

  public getTimeCoordinate(kind: TimeLabelKind): number | null {
    const time = kind === 'start' ? this.startTime : this.endTime;

    if (time === null) {
      return null;
    }

    const coordinate = getXCoordinateFromTime(this.chart, time, this.series);

    return coordinate === null ? null : Number(coordinate);
  }

  public getTimeText(kind: TimeLabelKind): string {
    const time = kind === 'start' ? this.startTime : this.endTime;

    if (typeof time !== 'number') {
      return '';
    }

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

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

    if (!geometry) {
      return null;
    }

    switch (kind) {
      case 'target':
        return geometry.targetY;
      case 'entry':
        return geometry.entryY;
      case 'stop':
        return geometry.stopY;
      default:
        return null;
    }
  }

  public getPriceText(kind: PriceLabelKind): string {
    const geometry = this.getGeometry();

    if (!geometry) {
      return '';
    }

    switch (kind) {
      case 'target':
        return formatPrice(geometry.targetPrice) ?? '';
      case 'entry':
        return formatPrice(geometry.entryPrice) ?? '';
      case 'stop':
        return formatPrice(geometry.stopPrice) ?? '';
      default:
        return '';
    }
  }

  protected getHoveredItem(x: number, y: number): PrimitiveHoveredItem | null {
    const point = { x, y };

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

      return {
        cursorStyle: 'pointer',
        externalId: 'slider-position',
        zOrder: 'top',
      };
    }

    const dragTarget = this.getHandleTarget(point);

    if (!dragTarget) {
      return null;
    }

    let cursorStyle: PrimitiveHoveredItem['cursorStyle'] = 'grab';

    if (dragTarget === 'target' || dragTarget === 'stop') {
      cursorStyle = 'ns-resize';
    }

    if (dragTarget === 'end') {
      cursorStyle = 'ew-resize';
    }

    return {
      cursorStyle,
      externalId: 'slider-position',
      zOrder: 'top',
    };
  }

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

    const geometry = this.getGeometry();

    if (!geometry) {
      return [];
    }

    const { colors } = getThemeStore();

    return [
      {
        from: geometry.profitTop,
        to: geometry.profitBottom,
        color: colors.axisMarkerAreaFill,
      },
      {
        from: geometry.lossTop,
        to: geometry.lossBottom,
        color: colors.axisMarkerAreaFill,
      },
    ];
  }

  protected getTimeAxisLabel(kind: string): AxisLabel | null {
    if (!this.isSelected() || (kind !== 'start' && kind !== 'end')) {
      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 (kind !== 'target' && kind !== 'entry' && kind !== 'stop') {
      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();

    let backgroundColor = colors.axisMarkerLabelDefaultFill;

    if (labelKind === 'target') {
      backgroundColor = colors.axisMarkerLabelPositiveFill;
    }

    if (labelKind === 'stop') {
      backgroundColor = colors.axisMarkerLabelNegativeFill;
    }

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

  protected bindEvents(): void {
    if (this.isBound) {
      return;
    }

    super.bindEvents();
    this.chart.subscribeClick(this.clickHandler);
  }

  protected unbindEvents(): void {
    if (!this.isBound) {
      return;
    }

    this.chart.unsubscribeClick(this.clickHandler);
    super.unbindEvents();
  }

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

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

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

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

    this.openSettings?.();
  };

  private handleChartClick(params: MouseEventParams<Time>): void {
    if (this.hidden || !params.point || this.mode !== 'idle') {
      return;
    }

    const anchor = this.createAnchor(params);

    if (!anchor) {
      return;
    }

    const distance = this.getInitialZoneDistance(anchor.price);
    const stopDirection = this.side === 'long' ? -1 : 1;
    const targetDirection = -stopDirection;

    this.startTime = anchor.time;
    this.endTime = this.shiftTime(anchor.time, INITIAL_WIDTH_PX) ?? anchor.time;
    this.entryPrice = anchor.price;
    this.stopPrice = this.normalizeStop(anchor.price, anchor.price + distance * stopDirection, distance);
    this.targetPrice = this.normalizeTarget(
      anchor.price,
      anchor.price + distance * targetDirection * this.defaultRiskRewardRatio,
      distance,
    );

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

    this.render();
  }

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

    const point = this.getEventPoint(event);

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

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

      this.select();
      return;
    }

    const dragTarget = this.getHandleTarget(point);

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

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

    this.activeDragTarget = dragTarget;
    this.dragPointerId = event.pointerId;
    this.dragStartPoint = point;
    this.dragStateSnapshot = this.getState();
    this.mode = 'dragging';
  };

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

    event.preventDefault();

    this.applyDrag(this.getEventPoint(event));
    this.render();
  };

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

    this.activeDragTarget = null;
    this.dragPointerId = null;
    this.dragStartPoint = null;
    this.dragStateSnapshot = null;

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

    this.render();
  };

  private applyDrag(point: Point): void {
    const snapshot = this.dragStateSnapshot;

    if (!snapshot) {
      return;
    }

    switch (this.activeDragTarget) {
      case 'body':
        this.moveWhole(snapshot, point);
        break;
      case 'entry':
        this.moveEntry(snapshot, point);
        break;
      case 'target':
        this.moveTarget(snapshot, point);
        break;
      case 'stop':
        this.moveStop(snapshot, point);
        break;
      case 'end':
        this.resizeEnd(snapshot, point);
        break;
      default:
        break;
    }
  }

  private moveEntry(snapshot: SliderPositionState, point: Point): void {
    if (snapshot.stopPrice === null || snapshot.targetPrice === null) {
      return;
    }

    const nextPrice = getPriceFromYCoordinate(this.series, point.y);

    if (nextPrice === null) {
      return;
    }

    const minDistance = this.getEditMinimumDistance();
    const low = Math.min(snapshot.stopPrice, snapshot.targetPrice) + minDistance;
    const high = Math.max(snapshot.stopPrice, snapshot.targetPrice) - minDistance;

    if (low > high) {
      return;
    }

    this.entryPrice = Math.max(low, Math.min(nextPrice, high));
  }

  private moveWhole(snapshot: SliderPositionState, point: Point): void {
    if (snapshot.startTime === null || snapshot.endTime === null) {
      return;
    }

    if (snapshot.entryPrice === null || snapshot.stopPrice === null || snapshot.targetPrice === null) {
      return;
    }

    if (!this.dragStartPoint) {
      return;
    }

    const timeOffset = point.x - this.dragStartPoint.x;
    const priceOffset = this.getPriceDelta(this.dragStartPoint.y, point.y);

    const nextStartTime = this.shiftTime(snapshot.startTime, timeOffset);
    const nextEndTime = this.shiftTime(snapshot.endTime, timeOffset);

    if (nextStartTime === null || nextEndTime === null) {
      return;
    }

    let nextEntryPrice = snapshot.entryPrice + priceOffset;
    let nextStopPrice = snapshot.stopPrice + priceOffset;
    let nextTargetPrice = snapshot.targetPrice + priceOffset;

    const range = this.getPriceScaleRange();

    if (range) {
      const minValue = Math.min(nextEntryPrice, nextStopPrice, nextTargetPrice);
      const maxValue = Math.max(nextEntryPrice, nextStopPrice, nextTargetPrice);

      if (minValue < range.min) {
        const shift = range.min - minValue;

        nextEntryPrice += shift;
        nextStopPrice += shift;
        nextTargetPrice += shift;
      }

      if (maxValue > range.max) {
        const shift = maxValue - range.max;

        nextEntryPrice -= shift;
        nextStopPrice -= shift;
        nextTargetPrice -= shift;
      }
    }

    this.startTime = nextStartTime;
    this.endTime = nextEndTime;
    this.entryPrice = nextEntryPrice;
    this.stopPrice = nextStopPrice;
    this.targetPrice = nextTargetPrice;
  }

  private moveStop(snapshot: SliderPositionState, point: Point): void {
    if (snapshot.entryPrice === null) {
      return;
    }

    const nextPrice = getPriceFromYCoordinate(this.series, point.y);

    if (nextPrice === null) {
      return;
    }

    this.stopPrice = this.normalizeStop(
      snapshot.entryPrice,
      this.clampPriceToRange(nextPrice),
      this.getEditMinimumDistance(),
    );
  }

  private moveTarget(snapshot: SliderPositionState, point: Point): void {
    if (snapshot.entryPrice === null) {
      return;
    }

    const nextPrice = getPriceFromYCoordinate(this.series, point.y);

    if (nextPrice === null) {
      return;
    }

    this.targetPrice = this.normalizeTarget(
      snapshot.entryPrice,
      this.clampPriceToRange(nextPrice),
      this.getEditMinimumDistance(),
    );
  }

  private resizeEnd(snapshot: SliderPositionState, point: Point): void {
    const nextEndTime = getTimeFromXCoordinate(this.chart, point.x);

    if (nextEndTime === null) {
      return;
    }

    this.startTime = snapshot.startTime;
    this.endTime = nextEndTime;
  }

  private createAnchor(params: MouseEventParams<Time>): { time: Time; price: number } | null {
    if (!params.point || params.time === undefined) {
      return null;
    }

    const price = getPriceFromYCoordinate(this.series, params.point.y);

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

    return {
      time: params.time,
      price,
    };
  }

  private normalizeStop(entryPrice: number, rawPrice: number, minDistance = this.getEditMinimumDistance()): number {
    const distance = this.getAllowedMinimumDistance(entryPrice, 'stop', minDistance);

    return this.side === 'long' ? Math.min(rawPrice, entryPrice - distance) : Math.max(rawPrice, entryPrice + distance);
  }

  private normalizeTarget(entryPrice: number, rawPrice: number, minDistance = this.getEditMinimumDistance()): number {
    const distance = this.getAllowedMinimumDistance(entryPrice, 'target', minDistance);

    return this.side === 'long' ? Math.max(rawPrice, entryPrice + distance) : Math.min(rawPrice, entryPrice - distance);
  }

  private getAllowedMinimumDistance(entryPrice: number, kind: 'stop' | 'target', minDistance: number): number {
    const range = this.getPriceScaleRange();

    if (!range) {
      return minDistance;
    }

    const availableDistance =
      this.side === 'long'
        ? kind === 'stop'
          ? Math.max(entryPrice - range.min, 0)
          : Math.max(range.max - entryPrice, 0)
        : kind === 'stop'
          ? Math.max(range.max - entryPrice, 0)
          : Math.max(entryPrice - range.min, 0);

    return Math.min(minDistance, availableDistance);
  }

  private clampPriceToRange(price: number): number {
    const range = this.getPriceScaleRange();

    if (!range) {
      return price;
    }

    return Math.max(range.min, Math.min(price, range.max));
  }

  private getInitialZoneDistance(entryPrice: number): number {
    const fallback = Math.max(Math.abs(entryPrice) * 0.0075, this.tickSize * 3, MIN_DISTANCE);
    const range = this.getPriceScaleRange();

    if (!range) {
      return fallback;
    }

    const size = range.max - range.min;

    if (size <= 0) {
      return fallback;
    }

    return Math.max(size * 0.05, this.tickSize * 3, MIN_DISTANCE);
  }

  private getEditMinimumDistance(): number {
    return Math.max(this.tickSize, MIN_DISTANCE);
  }

  private getPriceScaleRange(): { min: number; max: number } | null {
    return getPriceRangeInContainer(this.series, this.container);
  }

  private getPriceDelta(fromY: number, toY: number): number {
    return getPriceDeltaFromCoordinates(this.series, fromY, toY);
  }

  private shiftTime(time: Time, offsetX: number): Time | null {
    return shiftTimeByPixels(this.chart, time, offsetX, this.series);
  }

  private getCurrentRiskRewardRatio(): number {
    if (this.entryPrice === null || this.stopPrice === null || this.targetPrice === null) {
      return this.defaultRiskRewardRatio;
    }

    const risk = Math.abs(this.entryPrice - this.stopPrice);

    if (!risk) {
      return this.defaultRiskRewardRatio;
    }

    return Math.abs(this.targetPrice - this.entryPrice) / risk;
  }

  private getPriceAtTime(time: Time | null): number | null {
    if (typeof time !== 'number') {
      return null;
    }

    const data = this.series.data() ?? [];
    let lastPrice: number | null = null;

    for (const item of data) {
      if (typeof item.time !== 'number') {
        continue;
      }

      if (item.time > time) {
        break;
      }

      if ('close' in item && typeof item.close === 'number') {
        lastPrice = item.close;
        continue;
      }

      if ('value' in item && typeof item.value === 'number') {
        lastPrice = item.value;
      }
    }

    return lastPrice;
  }

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

    if (this.entryPrice === null || this.stopPrice === null || this.targetPrice === null) {
      return null;
    }

    const startX = getXCoordinateFromTime(this.chart, this.startTime, this.series);
    const endX = getXCoordinateFromTime(this.chart, this.endTime, this.series);
    const entryY = getYCoordinateFromPrice(this.series, this.entryPrice);
    const stopY = getYCoordinateFromPrice(this.series, this.stopPrice);
    const targetY = getYCoordinateFromPrice(this.series, this.targetPrice);

    if (startX === null || endX === null || entryY === null || stopY === null || targetY === null) {
      return null;
    }

    const start = Number(startX);
    const end = Number(endX);
    const entry = Number(entryY);
    const stop = Number(stopY);
    const target = Number(targetY);

    return {
      startX: start,
      endX: end,
      leftX: Math.min(start, end),
      rightX: Math.max(start, end),
      entryY: entry,
      stopY: stop,
      targetY: target,
      entryPrice: this.entryPrice,
      stopPrice: this.stopPrice,
      targetPrice: this.targetPrice,
      profitTop: Math.min(target, entry),
      profitBottom: Math.max(target, entry),
      lossTop: Math.min(stop, entry),
      lossBottom: Math.max(stop, entry),
    };
  }

  private getTargetText(geometry: SliderGeometry): string {
    const diff = Math.abs(geometry.targetPrice - geometry.entryPrice);
    const percent = geometry.entryPrice !== 0 ? (diff / Math.abs(geometry.entryPrice)) * 100 : 0;
    const ticks = this.tickSize > 0 ? diff / this.tickSize : 0;

    const formattedDiff = formatPrice(diff) ?? '0';
    const formattedTicks = formatPrice(ticks) ?? '0';
    const formattedAmount = formatPrice(this.amount) ?? '0';

    return `${t('Target')}: ${formattedDiff} (${formatPercent(percent)}) ${formattedTicks}, ${t('Amount')}: ${formattedAmount}`;
  }

  private getCenterText(qty: number, pnl: number): string {
    const formattedQty = formatPrice(qty) ?? '0';
    const formattedRatio = formatPrice(this.getCurrentRiskRewardRatio()) ?? '0';

    return `${t('Open P&L')}: ${formatSignedNumber(pnl)}, ${t('Qty')}: ${formattedQty}\n${t('Risk/Reward Ratio')}: ${formattedRatio}`;
  }

  private getStopText(geometry: SliderGeometry): string {
    const stopDiff = Math.abs(geometry.stopPrice - geometry.entryPrice);
    const rewardDiff = Math.abs(geometry.targetPrice - geometry.entryPrice);
    const percent = geometry.entryPrice !== 0 ? (stopDiff / Math.abs(geometry.entryPrice)) * 100 : 0;
    const ticks = this.tickSize > 0 ? stopDiff / this.tickSize : 0;
    const qty = rewardDiff > 0 ? this.amount / rewardDiff : 0;
    const stopAmount = stopDiff * qty;

    const formattedStopDiff = formatPrice(stopDiff) ?? '0';
    const formattedTicks = formatPrice(ticks) ?? '0';
    const formattedStopAmount = formatPrice(stopAmount) ?? '0';

    return `${t('Stop')}: ${formattedStopDiff} (${formatPercent(percent)}) ${formattedTicks}, ${t('Amount')}: ${formattedStopAmount}`;
  }

  private getHandleTarget(point: Point): DragTarget {
    const geometry = this.getGeometry();

    if (!geometry) {
      return null;
    }

    if (isNearPoint(point, geometry.startX, geometry.entryY, HIT_TOLERANCE)) {
      return 'entry';
    }

    if (isNearPoint(point, geometry.startX, geometry.targetY, HIT_TOLERANCE)) {
      return 'target';
    }

    if (isNearPoint(point, geometry.startX, geometry.stopY, HIT_TOLERANCE)) {
      return 'stop';
    }

    if (isNearPoint(point, geometry.endX, geometry.entryY, HIT_TOLERANCE)) {
      return 'end';
    }

    const minY = Math.min(geometry.targetY, geometry.stopY);
    const maxY = Math.max(geometry.targetY, geometry.stopY);

    const bounds: Bounds = {
      left: geometry.leftX,
      right: geometry.rightX,
      top: minY,
      bottom: maxY,
    };

    if (isPointInBounds(point, bounds)) {
      return 'body';
    }

    return null;
  }

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

    if (!geometry) {
      return false;
    }

    const minY = Math.min(geometry.targetY, geometry.stopY);
    const maxY = Math.max(geometry.targetY, geometry.stopY);

    const bounds: Bounds = {
      left: geometry.leftX,
      right: geometry.rightX,
      top: minY,
      bottom: maxY,
    };

    return isPointInBounds(point, bounds, HIT_TOLERANCE);
  }
}



import { CanvasRenderingTarget2D } from 'fancy-canvas';
import { IPrimitivePaneRenderer } from 'lightweight-charts';

import { getThemeStore } from '@src/theme';

import type { SliderPositionTextStyle } from './settings';
import type { SliderPosition } from './sliderPosition';

const UI = {
  lineWidth: 1,
  lineHeightMultiplier: 1.2,
  mainBoxHeight: 28,
  sideBoxHeight: 16,
  padding: 4,
  boxRadius: 4,
  labelOffset: 10,
  handleSize: 10,
  handleRadius: 3,
  handleBorderWidth: 1,
};

export class SliderPaneRenderer implements IPrimitivePaneRenderer {
  private readonly slider: SliderPosition;

  constructor(slider: SliderPosition) {
    this.slider = slider;
  }

  public draw(target: CanvasRenderingTarget2D): void {
    const data = this.slider.getRenderData();

    if (!data) {
      return;
    }

    target.useBitmapCoordinateSpace(({ context, horizontalPixelRatio, verticalPixelRatio }) => {
      const startX = data.startX * horizontalPixelRatio;
      const endX = data.endX * horizontalPixelRatio;
      const left = data.leftX * horizontalPixelRatio;
      const right = data.rightX * horizontalPixelRatio;

      const entryY = data.entryY * verticalPixelRatio;
      const stopY = data.stopY * verticalPixelRatio;
      const targetY = data.targetY * verticalPixelRatio;

      const profitTop = data.profitTop * verticalPixelRatio;
      const profitBottom = data.profitBottom * verticalPixelRatio;
      const lossTop = data.lossTop * verticalPixelRatio;
      const lossBottom = data.lossBottom * verticalPixelRatio;

      const centerX = (left + right) / 2;
      const sideBoxHeightPx = UI.sideBoxHeight * verticalPixelRatio;
      const mainBoxHeightPx = UI.mainBoxHeight * verticalPixelRatio;
      const labelOffsetPx = UI.labelOffset * verticalPixelRatio;

      const targetLabelCenterY =
        targetY < entryY
          ? targetY - labelOffsetPx - sideBoxHeightPx / 2
          : targetY + labelOffsetPx + sideBoxHeightPx / 2;

      const stopLabelCenterY =
        stopY < entryY ? stopY - labelOffsetPx - sideBoxHeightPx / 2 : stopY + labelOffsetPx + sideBoxHeightPx / 2;

      context.save();

      if (data.showFill) {
        context.fillStyle = data.positiveFillColor;
        context.fillRect(left, profitTop, right - left, profitBottom - profitTop);

        context.fillStyle = data.negativeFillColor;
        context.fillRect(left, lossTop, right - left, lossBottom - lossTop);
      }

      context.lineWidth = UI.lineWidth * Math.max(horizontalPixelRatio, verticalPixelRatio);
      context.strokeStyle = data.lineColor;
      drawHorizontalLine(context, left, right, entryY);

      if (data.showHandles) {
        drawHandle(context, startX, entryY, horizontalPixelRatio, verticalPixelRatio, 'circle');
        drawHandle(context, endX, entryY, horizontalPixelRatio, verticalPixelRatio, 'rounded');
        drawHandle(context, startX, targetY, horizontalPixelRatio, verticalPixelRatio, 'rounded');
        drawHandle(context, startX, stopY, horizontalPixelRatio, verticalPixelRatio, 'rounded');
      }

      if (data.showLabels) {
        drawTextBox(
          context,
          centerX,
          targetLabelCenterY,
          data.targetText,
          data.positiveFillColor,
          data,
          horizontalPixelRatio,
          verticalPixelRatio,
          UI.sideBoxHeight,
        );

        drawTextBox(
          context,
          centerX,
          entryY + labelOffsetPx + mainBoxHeightPx / 2,
          data.centerText,
          data.centerBoxColor,
          data,
          horizontalPixelRatio,
          verticalPixelRatio,
          UI.mainBoxHeight,
        );

        drawTextBox(
          context,
          centerX,
          stopLabelCenterY,
          data.stopText,
          data.negativeFillColor,
          data,
          horizontalPixelRatio,
          verticalPixelRatio,
          UI.sideBoxHeight,
        );
      }

      context.restore();
    });
  }
}

function drawHorizontalLine(context: CanvasRenderingContext2D, left: number, right: number, y: number): void {
  context.beginPath();
  context.moveTo(left, y);
  context.lineTo(right, y);
  context.stroke();
}

function drawHandle(
  context: CanvasRenderingContext2D,
  x: number,
  y: number,
  horizontalPixelRatio: number,
  verticalPixelRatio: number,
  shape: 'circle' | 'rounded',
): void {
  const width = UI.handleSize * horizontalPixelRatio;
  const height = UI.handleSize * verticalPixelRatio;
  const left = x - width / 2;
  const top = y - height / 2;

  const { colors } = getThemeStore();

  context.save();
  context.fillStyle = colors.chartBackground;
  context.strokeStyle = colors.chartLineColor;
  context.lineWidth = UI.handleBorderWidth * Math.max(horizontalPixelRatio, verticalPixelRatio);

  context.beginPath();

  if (shape === 'circle') {
    context.arc(x, y, Math.min(width, height) / 2, 0, Math.PI * 2);
  } else {
    drawRoundedRect(
      context,
      left,
      top,
      width,
      height,
      UI.handleRadius * Math.max(horizontalPixelRatio, verticalPixelRatio),
    );
  }

  context.fill();
  context.stroke();
  context.restore();
}

function drawTextBox(
  context: CanvasRenderingContext2D,
  centerX: number,
  centerY: number,
  text: string,
  fillColor: string,
  textStyle: SliderPositionTextStyle,
  horizontalPixelRatio: number,
  verticalPixelRatio: number,
  fixedHeight: number,
): void {
  context.save();

  const lines = text.split('\n');
  const fontSize = textStyle.fontSize * verticalPixelRatio;
  const lineHeight = Math.round(textStyle.fontSize * UI.lineHeightMultiplier) * verticalPixelRatio;
  const paddingX = UI.padding * horizontalPixelRatio;
  const paddingY = UI.padding * verticalPixelRatio;
  const minBoxHeight = fixedHeight * verticalPixelRatio;
  const boxHeight = Math.max(minBoxHeight, lines.length * lineHeight + paddingY * 2);
  const radius = UI.boxRadius * Math.max(horizontalPixelRatio, verticalPixelRatio);

  context.font = getTextFont(textStyle, fontSize);
  context.textAlign = 'center';
  context.textBaseline = 'middle';

  let maxTextWidth = 0;

  for (const line of lines) {
    maxTextWidth = Math.max(maxTextWidth, context.measureText(line).width);
  }

  const width = maxTextWidth + paddingX * 2;
  const x = centerX - width / 2;
  const y = centerY - boxHeight / 2;

  context.fillStyle = fillColor;
  context.beginPath();
  drawRoundedRect(context, x, y, width, boxHeight, radius);
  context.fill();

  context.fillStyle = textStyle.textColor;

  if (lines.length === 1) {
    context.fillText(lines[0], centerX, centerY);
    context.restore();
    return;
  }

  const textBlockHeight = lines.length * lineHeight;
  const firstLineCenterY = centerY - textBlockHeight / 2 + lineHeight / 2;

  lines.forEach((line, index) => {
    context.fillText(line, centerX, firstLineCenterY + index * lineHeight);
  });

  context.restore();
}

function getTextFont(style: SliderPositionTextStyle, fontSize: number): string {
  const italic = style.isItalic ? 'italic ' : '';
  const bold = style.isBold ? '700 ' : '';

  return `${italic}${bold}${fontSize}px Inter, sans-serif`;
}

function drawRoundedRect(
  context: CanvasRenderingContext2D,
  x: number,
  y: number,
  width: number,
  height: number,
  radius: number,
): void {
  const safeRadius = Math.min(radius, width / 2, height / 2);

  context.moveTo(x + safeRadius, y);
  context.arcTo(x + width, y, x + width, y + height, safeRadius);
  context.arcTo(x + width, y + height, x, y + height, safeRadius);
  context.arcTo(x, y + height, x, y, safeRadius);
  context.arcTo(x, y, x + width, y, safeRadius);
  context.closePath();
}



import { getThemeStore } from '@src/theme';
import { t } from '@src/translations';
import { SettingField, SettingsTab, SettingsValues } from '@src/types';

export interface SliderPositionStyle {
  lineColor: string;
  positiveFillColor: string;
  negativeFillColor: string;
}

export interface SliderPositionTextStyle {
  textColor: string;
  fontSize: number;
  isBold: boolean;
  isItalic: boolean;
}

export type SliderPositionSettings = SettingsValues & SliderPositionStyle & SliderPositionTextStyle;

export function createDefaultSettings(): SliderPositionSettings {
  const { colors } = getThemeStore();

  return {
    lineColor: colors.chartCrosshairLine,
    positiveFillColor: colors.sliderPositiveFill,
    negativeFillColor: colors.sliderNegativeFill,
    textColor: colors.chartPriceLineText,
    fontSize: 10,
    isBold: false,
    isItalic: false,
  };
}

export function getSliderPositionSettingsTabs(settings: SliderPositionSettings): SettingsTab[] {
  const styleFields: SettingField[] = [
    {
      key: 'lineColor',
      label: t('Line'),
      type: 'color',
      defaultValue: settings.lineColor,
    },
    {
      key: 'positiveFillColor',
      label: t('Profit zone'),
      type: 'color',
      defaultValue: settings.positiveFillColor,
      toolbar: {
        control: 'color',
        role: 'fill',
      },
    },
    {
      key: 'negativeFillColor',
      label: t('Loss zone'),
      type: 'color',
      defaultValue: settings.negativeFillColor,
      toolbar: {
        control: 'color',
        role: 'fill',
      },
    },
  ];

  const textFields: SettingField[] = [
    {
      key: 'fontSize',
      label: t('Font size'),
      type: 'number',
      defaultValue: settings.fontSize,
      min: 8,
      max: 24,
    },
    {
      key: 'isBold',
      label: t('Bold'),
      type: 'boolean',
      defaultValue: settings.isBold,
    },
    {
      key: 'isItalic',
      label: t('Italic'),
      type: 'boolean',
      defaultValue: settings.isItalic,
    },
    {
      key: 'textColor',
      label: t('Text'),
      type: 'color',
      defaultValue: settings.textColor,
      toolbar: {
        control: 'color',
        role: 'text',
      },
    },
  ];

  return [
    {
      key: 'style',
      label: t('Style'),
      fields: styleFields,
    },
    {
      key: 'text',
      label: t('Text'),
      fields: textFields,
    },
  ];
}