import {
  Options,
  TickOrientation,
  TimeFormat,
  BrushOrientation,
  AxisFormat,
  CrosshairOrientation,
  KeyEvent,
  PanOrientation,
  ScrollPanOrientation,
  ScrollPanDirection,
  GridOptions,
  AxesOptions,
  CrosshairOptions,
  Margin
} from '../types';

import lodashDefaultsDeep from 'lodash/defaultsDeep';
import lodashMap from 'lodash/map';
import lodashCloneDeep from 'lodash/cloneDeep';
import has from 'lodash/has';


const DEFAULT_TICK_COUNT = 4;
const DEFAULT_SCROLL_PAN_STEP = 50;
const DEFAULT_GRID_TICK_COUNT = 5;

const DEFAULT_GRID_OPTIONS: GridOptions = {
  x: {
    enabled: true,
    ticksCount: DEFAULT_GRID_TICK_COUNT,
  },
  y: {
    enabled: true,
    ticksCount: DEFAULT_GRID_TICK_COUNT,
  },
}

const DEFAULT_AXES_OPTIONS: AxesOptions = {
  x: {
    isActive: true,
    ticksCount: DEFAULT_TICK_COUNT,
    format: AxisFormat.TIME
  },
  y: {
    isActive: true,
    ticksCount: DEFAULT_TICK_COUNT,
    format: AxisFormat.NUMERIC
  },
  y1: {
    isActive: false,
    ticksCount: DEFAULT_TICK_COUNT,
    format: AxisFormat.NUMERIC
  }
}

const DEFAULT_CROSSHAIR_OPTIONS = {
  orientation: CrosshairOrientation.VERTICAL,
  color: 'gray',
}

const DEFAULT_OPTIONS: Options = {
  zoomEvents: {
    mouse: {
      zoom: {
        isActive: true,
        keyEvent: KeyEvent.MAIN,
        orientation: BrushOrientation.HORIZONTAL
      },
      pan: {
        isActive: true,
        keyEvent: KeyEvent.SHIFT,
        orientation: PanOrientation.HORIZONTAL
      },
      doubleClick: {
        isActive: true,
        keyEvent: KeyEvent.MAIN,
      },
    },
    scroll: {
      zoom: {
        isActive: true,
        keyEvent: KeyEvent.MAIN,
        orientation: PanOrientation.BOTH,
      },
      pan: {
        isActive: false,
        keyEvent: KeyEvent.SHIFT,
        panStep: DEFAULT_SCROLL_PAN_STEP,
        orientation: ScrollPanOrientation.HORIZONTAL,
        direction: ScrollPanDirection.BOTH,
      },
    },
  },
  axis: DEFAULT_AXES_OPTIONS,
  grid: DEFAULT_GRID_OPTIONS,
  crosshair: DEFAULT_CROSSHAIR_OPTIONS,
  renderLegend: true,
  // remove options below
  renderTicksfromTimestamps: false,
  timeInterval: {
    timeFormat: TimeFormat.MINUTE
  },
}

export class CoreOptions<O extends Options> {
  _options: O;
  _defaults: Options = DEFAULT_OPTIONS;

  constructor(options: O) {
    this.setOptions(options);
  }

  public updateOptions(options: O): void {
    this.setOptions(options);
  }

  protected setOptions(options: O): void {
    this._options = lodashDefaultsDeep(lodashCloneDeep(options), this._defaults);
  }

  get allOptions(): O {
    return this._options;
  }

  get grid(): GridOptions {
    return this._options.grid;
  }

  get axis(): AxesOptions {
    return this._options.axis;
  }

  get crosshair(): CrosshairOptions {
    return this._options.crosshair;
  }

  get margin(): Margin {
    return this._options.margin;
  }

  // event callbacks
  callbackRenderStart(): void {
    if(has(this._options.eventsCallbacks, 'renderStart')) {
      this._options.eventsCallbacks.renderStart();
    }
  }

  callbackRenderEnd(): void {
    if(has(this._options.eventsCallbacks, 'renderEnd')) {
      this._options.eventsCallbacks.renderStart();
    }
  }

  callbackLegendClick(idx: number): void {
    if(has(this._options.eventsCallbacks, 'onLegendClick')) {
      this._options.eventsCallbacks.onLegendClick(idx);
    }
  }

  callbackLegendLabelClick(idx: number): void {
    if(has(this._options.eventsCallbacks, 'onLegendLabelClick')) {
      this._options.eventsCallbacks.onLegendLabelClick(idx);
    }
  }
}