import { defineEventHandler, getQuery, createError } from "h3";
import { useRuntimeConfig } from "#imports";

export default defineEventHandler(async (event) => {
  const res = event.node.res;
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader("Access-Control-Allow-Methods", "GET, OPTIONS");
  res.setHeader("Access-Control-Allow-Headers", "Content-Type");

  if (event.node.req.method === "OPTIONS") {
    res.statusCode = 200;
    return "ok";
  }

  if (event.node.req.method !== "GET") {
    throw createError({ statusCode: 405, statusMessage: "Method Not Allowed" });
  }

  const config = useRuntimeConfig();
  const apiKey = config.wakatimeApiKey;
  if (typeof apiKey !== "string") {
    throw createError({ statusCode: 500, statusMessage: "Invalid WakaTime API Key configuration" });
  }

  const query = getQuery(event);
  const apiUrl = (query.apiUrl as string) || config.wakatimeApiUrl;

  const headers = {
    Authorization: `Basic ${Buffer.from(apiKey).toString("base64")}`,
  };

  try {
    const [weeklyStatsResponse, allTimeStatsResponse, statusResponse] = await Promise.all([
      fetch(`${apiUrl}/users/current/stats/last_7_days`, { headers }),
      fetch(`${apiUrl}/users/current/stats/all_time`, { headers }),
      fetch(`${apiUrl}/users/current/status`, { headers }),
    ]);

    if (!weeklyStatsResponse.ok) {
      throw new Error(`Wakatime API error: ${weeklyStatsResponse.status}`);
    }

    const weeklyStatsData = await weeklyStatsResponse.json();
    const allTimeStatsData = allTimeStatsResponse.ok ? await allTimeStatsResponse.json() : null;
    const statusData = statusResponse.ok ? await statusResponse.json() : null;

    return {
      weekly: weeklyStatsData.data,
      allTime: allTimeStatsData ? allTimeStatsData.data : null,
      status: statusData,
    };
  } catch (error) {
    console.error("Wakatime API error:", error);
    throw createError({ statusCode: 500, statusMessage: "Failed to fetch Wakatime data" });
  }
});