import { NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { getTournamentStatus } from "@/lib/tournamentUtils";
import { canCreateTournaments } from "@/lib/permissions";
import { getSession } from "@/lib/auth-simple";

export async function GET() {
  try {
    const tournaments = await prisma.event.findMany({
      where: { eventType: "tournament" },
      orderBy: { createdAt: "desc" },
      include: {
        participants: true,
        teams: {
          include: {
            player1: true,
            player2: true,
          },
        },
      },
    });

    // Update tournament statuses based on event date
    const updatedTournaments = await Promise.all(
      tournaments.map(async (tournament) => {
        const calculatedStatus = getTournamentStatus(tournament.eventDate);
        
        // Only update if the calculated status differs from the stored status
        if (tournament.status !== calculatedStatus) {
          await prisma.event.update({
            where: { id: tournament.id },
            data: { status: calculatedStatus },
          });
          return { ...tournament, status: calculatedStatus };
        }
        
        return tournament;
      })
    );

    return NextResponse.json({ tournaments: updatedTournaments });
  } catch (error) {
    console.error("Failed to fetch tournaments:", error);
    return NextResponse.json(
      { error: "Failed to fetch tournaments" },
      { status: 500 }
    );
  }
}

export async function POST(request: Request) {
  try {
    // Check if user has permission to create tournaments
    const permission = await canCreateTournaments();
    if (!permission.allowed) {
      return NextResponse.json(
        { error: permission.reason || 'Insufficient permissions to create tournaments' },
        { status: 403 }
      );
    }

    // Get the current user to assign as owner
    const session = await getSession();
    if (!session?.user?.id) {
      return NextResponse.json(
        { error: 'User not authenticated' },
        { status: 401 }
      );
    }

    const body = await request.json();
    const { name, format, eventDate } = body;

    const tournament = await prisma.event.create({
      data: {
        name,
        format: format || "round_robin",
        eventDate: eventDate ? new Date(eventDate) : null,
        eventType: "tournament",
        status: "planned",
        ownerId: session.user.id, // Assign ownership to the creator
      },
    });

    return NextResponse.json({ tournament }, { status: 201 });
  } catch (error) {
    console.error("Failed to create tournament:", error);
    return NextResponse.json(
      { error: "Failed to create tournament" },
      { status: 500 }
    );
  }
}