import React, { useState, useEffect } from 'react';
import ActivityCalendar from "react-activity-calendar";
import { Tooltip } from '@mui/material';

interface ProviderInfo {
  color: string;
  authors: string[];
}

const PROVIDERS_MAP: Record<string, ProviderInfo> = {
  "Mistral AI": { color: "#ff7000", authors: ["mistralai"] },
  "Meta": { color: "#1877F2", authors: ["facebook", "meta-llama"] },
  "OpenAI": { color: "#10A37F", authors: ["openai"] },
  "Anthropic": { color: "#cc785c", authors: ["Anthropic"] },
  "Google": { color: "#DB4437", authors: ["google"] },
  "Allen Institute for AI": { color: "#5E35B1", authors: ["allenai"] },
  "Apple": { color: "#0088cc", authors: ["apple"] },
  "Microsoft": { color: "#FEB800", authors: ["microsoft"] },
  "NVIDIA": { color: "#76B900", authors: ["nvidia"] },
  "DeepSeek": { color: "#0088cc", authors: ["deepseek-ai"] },
  "Qwen": { color: "#0088cc", authors: ["Qwen"] },
  "Cohere For AI": { color: "#4C6EE6", authors: ["CohereForAI"] },
  "IBM": { color: "#4C6EE6", authors: ["ibm-granite"] },
};

interface ModelData {
  createdAt: string;
  id: string;
}

interface Activity {
  date: string;
  count: number;
  level: number;
}

export default function OpenSourceHeatmap() {
  const [calendarData, setCalendarData] = useState<Record<string, Activity[]>>({});
  const [isLoading, setIsLoading] = useState(true);

  const generateCalendarData = (modelData: ModelData[]) => {
    const data: Record<string, Activity[]> = Object.fromEntries(
      Object.keys(PROVIDERS_MAP).map(provider => [provider, []])
    );

    const today = new Date();
    const startDate = new Date(today);
    startDate.setMonth(today.getMonth() - 11);
    startDate.setDate(1);

    // create a map to store counts for each provider and date
    const countMap: Record<string, Record<string, number>> = {};

    modelData.forEach(item => {
      const dateString = item.createdAt.split('T')[0];
      Object.entries(PROVIDERS_MAP).forEach(([provider, { authors }]) => {
        if (authors.some(author => item.id.startsWith(author))) {
          countMap[provider] = countMap[provider] || {};
          countMap[provider][dateString] = (countMap[provider][dateString] || 0) + 1;
        }
      });
    });

    // fill in with 0s for days with no activity
    for (let d = new Date(startDate); d <= today; d.setDate(d.getDate() + 1)) {
      const dateString = d.toISOString().split('T')[0];
      
      Object.entries(PROVIDERS_MAP).forEach(([provider]) => {
        const count = countMap[provider]?.[dateString] || 0;
        data[provider].push({ date: dateString, count, level: 0 });
      });
    }

    // calculate average counts for each provider
    const avgCounts = Object.fromEntries(
      Object.entries(data).map(([provider, days]) => [
        provider,
        days.reduce((sum, day) => sum + day.count, 0) / days.length || 0
      ])
    );

    // assign levels based on count relative to average
    Object.entries(data).forEach(([provider, days]) => {
      const avgCount = avgCounts[provider];
      days.forEach(day => {
        day.level = 
          day.count === 0 ? 0 :
          day.count <= avgCount * 0.5 ? 1 :
          day.count <= avgCount ? 2 :
          day.count <= avgCount * 1.5 ? 3 : 4;
      });
    });

    return data;
  }

  const initData = async () => {
    try {
      const allAuthors = Object.values(PROVIDERS_MAP).flatMap(({ authors }) => authors);
      const uniqueAuthors = Array.from(new Set(allAuthors));

      const allModelData = await Promise.all(
        uniqueAuthors.map(async (author) => {
          const response = await fetch(`https://huggingface.co/api/models?author=${author}&sort=createdAt&direction=-1`);
          const data = await response.json();
          return data.map((item: any) => ({
            createdAt: item.createdAt,
            id: item.id,
          }));
        })
      );

      const flatModelData = allModelData.flat();
      const calendarData = generateCalendarData(flatModelData);
      setCalendarData(calendarData);
    } catch (error) {
      console.error("Error fetching data:", error);
    } finally {
      setIsLoading(false);
    }
  }

  useEffect(() => {
    initData();
  }, []);

  return (
    <div className="w-full max-w-screen-lg mx-auto p-4">
      <h1 className="text-3xl lg:text-5xl mt-16 font-bold text-center mb-2">Hugging Face Heatmap 🤗</h1>
      <p className="text-center text-sm mb-8">The top AI labs and model releases.</p>
      {isLoading ? (
        <p className="text-center">Loading...</p>
      ) : (
        <div className="space-y-8">
          {Object.entries(PROVIDERS_MAP)
            .sort(([keyA], [keyB]) => 
              calendarData[keyB].reduce((sum, day) => sum + day.count, 0) -
              calendarData[keyA].reduce((sum, day) => sum + day.count, 0)
            )
            .map(([providerName, { color }]) => (
              <div key={providerName} className="flex flex-col items-center">
                <h2 className="text-xl font-bold mb-4">{providerName}</h2>
                <div className="w-full overflow-x-auto flex justify-center">
                  <ActivityCalendar 
                    data={calendarData[providerName]}
                    theme={{
                      dark: ['#161b22', color],
                      light: ['#e0e0e0', color],
                    }}
                    hideTotalCount
                    renderBlock={(block, activity) => (
                      <Tooltip
                        title={`${activity.count} models created on ${activity.date}`}
                        arrow
                      >
                        {block}
                      </Tooltip>
                    )}
                  />
                </div>
              </div>
            ))
          }
        </div>
      )}
    </div>
  );
}