import { RefObject, useEffect, useRef } from 'react';
import { IoEllipsisHorizontal } from 'react-icons/io5';
import { useSessionStorage } from '@mantine/hooks';
import { flexRender, Table } from '@tanstack/react-table';
import { OntimeEntry, OntimeEvent, RGBColour, SupportedEntry } from 'ontime-types';
import { colourToHex, cssOrHexToColour } from 'ontime-utils';

import IconButton from '../../../../common/components/buttons/IconButton';
import { cx, getAccessibleColour } from '../../../../common/utils/styleUtils';
import { AppMode, sessionKeys } from '../../../../ontimeConfig';
import { usePersistedCuesheetOptions } from '../../cuesheet.options';
import { useCuesheetTableMenu } from '../cuesheet-table-menu/useCuesheetTableMenu';

import { observeRow, unobserveRow } from './rowObserver';
import { useVisibleRowsStore } from './visibleRowsStore';

import style from './EventRow.module.scss';

interface EventRowProps {
  rowId: string;
  event: OntimeEvent;
  eventIndex: number;
  rowIndex: number;
  isPast?: boolean;
  selectedRef?: RefObject<HTMLTableRowElement | null>;
  skip?: boolean;
  colour?: string;
  rowBgColour?: string;
  parentBgColour?: string;
  table: Table<OntimeEntry>;
  firstAfterBlock: boolean;
}

export default function EventRow({
  rowId,
  event,
  eventIndex,
  rowIndex,
  isPast,
  selectedRef,
  rowBgColour,
  parentBgColour,
  table,
  firstAfterBlock,
}: EventRowProps) {
  const hideIndexColumn = usePersistedCuesheetOptions((state) => state.hideIndexColumn);
  const [cuesheetMode] = useSessionStorage<AppMode>({
    key: sessionKeys.cuesheetMode,
    defaultValue: AppMode.Edit,
  });
  const ownRef = useRef<HTMLTableRowElement>(null);

  const isVisible = useVisibleRowsStore((state) => state.visibleRows.has(rowId));

  const openMenu = useCuesheetTableMenu((store) => store.openMenu);

  // register this row with the intersection observer
  useEffect(() => {
    const element = ownRef.current;
    if (element) {
      element.id = rowId;
      observeRow(element);
    }

    return () => {
      if (element) {
        unobserveRow(element);
      }
    };
  }, [rowId]);

  const { color, backgroundColor } = getAccessibleColour(event.colour);
  const tmpColour = cssOrHexToColour(color) as RGBColour; // we know this to be a correct colour
  const mutedText = colourToHex({ ...tmpColour, alpha: tmpColour.alpha * 0.8 });

  return (
    <tr
      id={rowId}
      className={cx([
        style.eventRow,
        event.skip && style.skip,
        firstAfterBlock && style.firstAfterBlock,
        Boolean(parentBgColour) && style.hasParent,
      ])}
      style={{
        opacity: `${isPast ? '0.2' : '1'}`,
        '--user-bg': parentBgColour ?? 'transparent',
      }}
      ref={selectedRef ?? ownRef}
      data-testid='cuesheet-event'
    >
      {cuesheetMode === AppMode.Edit && (
        <td className={style.actionColumn} tabIndex={-1} role='cell'>
          <IconButton
            aria-label='Options'
            variant='subtle-white'
            size='small'
            onClick={(e) => {
              const rect = e.currentTarget.getBoundingClientRect();
              const yPos = 8 + rect.y + rect.height / 2;
              openMenu({ x: rect.x, y: yPos }, event.id, SupportedEntry.Event, rowIndex, event.parent, event.flag);
            }}
          >
            <IoEllipsisHorizontal />
          </IconButton>
        </td>
      )}
      {!hideIndexColumn && (
        <td className={style.indexColumn} style={{ backgroundColor, color: mutedText }} tabIndex={-1} role='cell'>
          {eventIndex}
        </td>
      )}
      {isVisible
        ? table
            .getRow(rowId)
            .getVisibleCells()
            .map((cell) => {
              return (
                <td
                  key={cell.id}
                  style={{
                    width: `calc(var(--col-${cell.column.id}-size) * 1px)`,
                    backgroundColor: rowBgColour,
                  }}
                  tabIndex={-1}
                  role='cell'
                >
                  {flexRender(cell.column.columnDef.cell, cell.getContext())}
                </td>
              );
            })
        : null}
    </tr>
  );
}