import { useDateTimeFormat } from '@/localization/hooks/useDateTimeFormat';
import { PageLayoutComponentInstanceContext } from '@/page-layout/states/contexts/PageLayoutComponentInstanceContext';
import { pageLayoutCurrentLayoutsComponentState } from '@/page-layout/states/pageLayoutCurrentLayoutsComponentState';
import { pageLayoutDraftComponentState } from '@/page-layout/states/pageLayoutDraftComponentState';
import { pageLayoutDraggedAreaComponentState } from '@/page-layout/states/pageLayoutDraggedAreaComponentState';
import { type GraphWidgetFieldSelection } from '@/page-layout/types/GraphWidgetFieldSelection';
import { type PageLayoutWidget } from '@/page-layout/types/PageLayoutWidget';
import { addWidgetToTab } from '@/page-layout/utils/addWidgetToTab';
import { createDefaultGraphWidget } from '@/page-layout/utils/createDefaultGraphWidget';
import { getDefaultWidgetPosition } from '@/page-layout/utils/getDefaultWidgetPosition';
import { getUpdatedTabLayouts } from '@/page-layout/utils/getUpdatedTabLayouts';
import { getWidgetSize } from '@/page-layout/utils/getWidgetSize';
import { getWidgetTitle } from '@/page-layout/utils/getWidgetTitle';
import { isWidgetConfigurationOfType } from '@/side-panel/pages/page-layout/utils/isWidgetConfigurationOfType';
import { activeTabIdComponentState } from '@/ui/layout/tab-list/states/activeTabIdComponentState';
import { useAvailableComponentInstanceIdOrThrow } from '@/ui/utilities/state/component-state/hooks/useAvailableComponentInstanceIdOrThrow';
import { useAtomComponentStateCallbackState } from '@/ui/utilities/state/jotai/hooks/useAtomComponentStateCallbackState';
import { useStore } from 'jotai';
import { useCallback } from 'react';
import { isDefined } from 'twenty-shared/utils';
import { v4 as uuidv4 } from 'uuid';
import {
  BarChartLayout,
  WidgetConfigurationType,
  WidgetType,
} from '~/generated-metadata/graphql';

export const useCreatePageLayoutGraphWidget = ({
  pageLayoutId: pageLayoutIdFromProps,
  tabListInstanceId,
}: {
  pageLayoutId: string;
  tabListInstanceId: string;
}) => {
  const pageLayoutId = useAvailableComponentInstanceIdOrThrow(
    PageLayoutComponentInstanceContext,
    pageLayoutIdFromProps,
  );

  const store = useStore();
  const { timeZone, calendarStartDay } = useDateTimeFormat();

  const pageLayoutDraftState = useAtomComponentStateCallbackState(
    pageLayoutDraftComponentState,
    pageLayoutId,
  );

  const pageLayoutCurrentLayoutsState = useAtomComponentStateCallbackState(
    pageLayoutCurrentLayoutsComponentState,
    pageLayoutId,
  );

  const pageLayoutDraggedAreaState = useAtomComponentStateCallbackState(
    pageLayoutDraggedAreaComponentState,
    pageLayoutId,
  );

  const createPageLayoutGraphWidget = useCallback(
    ({
      fieldSelection,
    }: {
      fieldSelection?: GraphWidgetFieldSelection;
    }): PageLayoutWidget => {
      const activeTabId = store.get(
        activeTabIdComponentState.atomFamily({
          instanceId: tabListInstanceId,
        }),
      );

      if (!isDefined(activeTabId)) {
        throw new Error('A tab must be selected to create a new graph widget');
      }

      const pageLayoutDraft = store.get(pageLayoutDraftState);

      const allTabLayouts = store.get(pageLayoutCurrentLayoutsState);

      const pageLayoutDraggedArea = store.get(pageLayoutDraggedAreaState);

      const allWidgets = pageLayoutDraft.tabs.flatMap((tab) => tab.widgets);
      const existingWidgetCount = allWidgets.filter((widget) => {
        if (widget.type !== WidgetType.GRAPH) {
          return false;
        }

        if (
          !isWidgetConfigurationOfType(
            widget.configuration,
            'BarChartConfiguration',
          )
        ) {
          return false;
        }
        return widget.configuration.layout === BarChartLayout.VERTICAL;
      }).length;

      const title = getWidgetTitle(
        {
          configurationType: WidgetConfigurationType.BAR_CHART,
          layout: BarChartLayout.VERTICAL,
        },
        existingWidgetCount,
      );
      const widgetId = uuidv4();

      const defaultSize = getWidgetSize(
        WidgetConfigurationType.BAR_CHART,
        'default',
      );
      const minimumSize = getWidgetSize(
        WidgetConfigurationType.BAR_CHART,
        'minimum',
      );
      const position = getDefaultWidgetPosition(
        pageLayoutDraggedArea,
        defaultSize,
        minimumSize,
      );

      const newWidget = createDefaultGraphWidget({
        id: widgetId,
        pageLayoutTabId: activeTabId,
        title,
        gridPosition: {
          row: position.y,
          column: position.x,
          rowSpan: position.h,
          columnSpan: position.w,
        },
        fieldSelection,
        timezone: timeZone,
        firstDayOfTheWeek: calendarStartDay,
      });

      const newLayout = {
        i: widgetId,
        x: position.x,
        y: position.y,
        w: position.w,
        h: position.h,
        minW: minimumSize.w,
        minH: minimumSize.h,
      };

      const updatedLayouts = getUpdatedTabLayouts(
        allTabLayouts,
        activeTabId,
        newLayout,
      );
      store.set(pageLayoutCurrentLayoutsState, updatedLayouts);

      store.set(pageLayoutDraftState, (prev) => ({
        ...prev,
        tabs: addWidgetToTab(prev.tabs, activeTabId, newWidget),
      }));

      store.set(pageLayoutDraggedAreaState, null);

      return newWidget;
    },
    [
      tabListInstanceId,
      pageLayoutCurrentLayoutsState,
      pageLayoutDraftState,
      pageLayoutDraggedAreaState,
      timeZone,
      calendarStartDay,
      store,
    ],
  );

  return { createPageLayoutGraphWidget };
};