import React, { useMemo, useCallback } from "react";
import ActivityCalendar from "react-activity-calendar";
import { Tooltip, Avatar } from "@mui/material";
import Link from "next/link";
import { aggregateToWeeklyData } from "../utils/weeklyCalendar";
import { getHeatmapTheme } from "../utils/heatmapColors";
import WeeklyHeatmap from "./WeeklyHeatmap";

type ViewMode = 'daily' | 'weekly';

type HeatmapProps = {
  data: Array<{ date: string; count: number; level: number }>;
  color: string;
  providerName: string;
  fullName: string;
  avatarUrl: string;
  authorId: string;
  showHeader?: boolean;
  viewMode: ViewMode;
};

const Heatmap: React.FC<HeatmapProps> = ({ 
  data, 
  color, 
  providerName, 
  fullName, 
  avatarUrl, 
  authorId, 
  showHeader = true,
  viewMode 
}) => {
  // Memoize the weekly data processing to avoid recalculation on every render
  const weeklyData = useMemo(() => aggregateToWeeklyData(data), [data]);
  
  // Choose data based on view mode
  const processedData = viewMode === 'weekly' ? weeklyData : data;
  
  // Memoize the theme to prevent recreation
  const theme = useMemo(() => getHeatmapTheme(color), [color]);
  
  // Memoize the render block callback
  const renderBlock = useCallback((block: React.ReactElement, activity: any) => (
    <Tooltip
      title={`${activity.count} new repos on ${activity.date}`}
      arrow
    >
      {block}
    </Tooltip>
  ), []);
  
  return (
    <div className="flex flex-col items-center w-full mx-auto">
      {showHeader && (
        <div className="flex flex-col sm:flex-row items-center mb-4 w-full justify-center">
          {avatarUrl && (
            <Avatar src={avatarUrl} alt={fullName} className="mb-2 sm:mb-0 sm:mr-4" sx={{ width: 48, height: 48 }} />
          )}
          <div className="text-center sm:text-left">
            <h2 className="text-lg font-semibold">
              <Link
                href={`https://huggingface.co/${authorId}`}
                target="_blank"
                rel="noopener noreferrer"
                className="hover:text-blue-500 hover:underline"
              >
                {fullName}
              </Link>
            </h2>
          </div>
        </div>
      )}
      <div className="w-full overflow-x-auto flex justify-center">
        {viewMode === 'weekly' ? (
          <WeeklyHeatmap data={processedData} color={color} />
        ) : (
          <ActivityCalendar
            data={processedData}
            theme={theme}
            blockSize={11}
            blockMargin={2}
            hideTotalCount
            renderBlock={renderBlock}
          />
        )}
      </div>
    </div>
  );
};

export default React.memo(Heatmap);