import { query, queryOne } from "@/lib/db";
import { getToken } from "next-auth/jwt";

export const dynamic = "force-dynamic"; // Disable caching

export async function GET(request) {
  try {
    // Verify authentication - users need to be logged in to see leaderboard
    const token = await getToken({
      req: request,
      secret:
        process.env.NEXTAUTH_SECRET ||
        "your-fallback-secret-should-be-at-least-32-chars",
    });

    if (!token) {
      return Response.json({ error: "Unauthorized" }, { status: 401 });
    }

    // Get the total number of clues for calculating progress
    const clueCountResult = await queryOne(
      "SELECT COUNT(*) as total FROM clues"
    );
    const totalClues = clueCountResult?.total || 0;

    // Get all teams with progress info and member count
    // Only include teams that have at least one member
    const teams = await query(`
      SELECT 
        t.id,
        t.name,
        t.code,
        COUNT(DISTINCT tc.clue_id) as cluesFound,
        MAX(tc.found_at) as lastActivity,
        COUNT(DISTINCT u.id) as memberCount
      FROM 
        teams t
      LEFT JOIN 
        users u ON t.id = u.team_id
      LEFT JOIN 
        team_clues tc ON t.id = tc.team_id
      GROUP BY 
        t.id
      HAVING 
        memberCount > 0
      ORDER BY 
        cluesFound DESC,
        lastActivity ASC
    `);

    // Add progress percentage and total clues to each team
    const teamsWithProgress = teams.map((team) => ({
      ...team,
      totalClues,
      progress:
        totalClues > 0 ? Math.round((team.cluesFound / totalClues) * 100) : 0,
    }));

    return Response.json(teamsWithProgress, {
      headers: {
        "Cache-Control": "no-store, no-cache, must-revalidate",
        Pragma: "no-cache",
        Expires: "0",
      },
    });
  } catch (error) {
    console.error("Leaderboard error:", error);
    return Response.json(
      { error: "Failed to fetch leaderboard data" },
      { status: 500 }
    );
  }
}