import { NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { hasRole } from "@/lib/permissions";

export async function PUT(
  request: Request,
  { params }: { params: { id: string } }
) {
  // Check permissions
  const permission = await hasRole("club_admin");
  if (!permission.allowed) {
    return NextResponse.json(
      { error: permission.reason || "Unauthorized" },
      { status: 403 }
    );
  }

  try {
    const { id } = params;
    const body = await request.json();
    const { email, name, role, playerId } = body;

    // Check if user exists
    const existingUser = await prisma.user.findUnique({
      where: { id },
    });

    if (!existingUser) {
      return NextResponse.json(
        { error: "User not found" },
        { status: 404 }
      );
    }

    // Update the user
    const user = await prisma.user.update({
      where: { id },
      data: {
        email: email || existingUser.email,
        name: name !== undefined ? name : existingUser.name,
        role: role || existingUser.role,
        playerId: playerId ? parseInt(playerId) : null,
      },
    });

    // Update the player's user relation if needed
    if (playerId !== undefined) {
      // First, remove user from any existing player
      if (existingUser.playerId && existingUser.playerId !== parseInt(playerId)) {
        await prisma.player.update({
          where: { id: existingUser.playerId },
          data: { user: { disconnect: true } },
        });
      }

      // Then, connect user to the new player
      if (playerId) {
        await prisma.player.update({
          where: { id: parseInt(playerId) },
          data: { user: { connect: { id: user.id } } },
        });
      }
    }

    return NextResponse.json({
      success: true,
      user: {
        id: user.id,
        email: user.email,
        name: user.name,
        role: user.role,
        playerId: user.playerId,
      },
    });
  } catch (error) {
    console.error("Error updating user:", error);
    return NextResponse.json(
      { error: "Failed to update user" },
      { status: 500 }
    );
  }
}

export async function DELETE(
  request: Request,
  { params }: { params: { id: string } }
) {
  // Check permissions - only site_admin can delete users
  const permission = await hasRole("site_admin");
  if (!permission.allowed) {
    return NextResponse.json(
      { error: permission.reason || "Unauthorized" },
      { status: 403 }
    );
  }

  try {
    const { id } = params;

    // Check if user exists
    const existingUser = await prisma.user.findUnique({
      where: { id },
    });

    if (!existingUser) {
      return NextResponse.json(
        { error: "User not found" },
        { status: 404 }
      );
    }

    // Cannot delete the last site_admin
    const siteAdminCount = await prisma.user.count({
      where: { role: "site_admin" },
    });

    if (existingUser.role === "site_admin" && siteAdminCount <= 1) {
      return NextResponse.json(
        { error: "Cannot delete the last site_admin user" },
        { status: 400 }
      );
    }

    // Remove user from player if associated
    if (existingUser.playerId) {
      await prisma.player.update({
        where: { id: existingUser.playerId },
        data: { user: { disconnect: true } },
      });
    }

    // Delete the user
    await prisma.user.delete({
      where: { id },
    });

    return NextResponse.json({
      success: true,
      message: "User deleted successfully",
    });
  } catch (error) {
    console.error("Error deleting user:", error);
    return NextResponse.json(
      { error: "Failed to delete user" },
      { status: 500 }
    );
  }
}

export async function GET(
  request: Request,
  { params }: { params: { id: string } }
) {
  // Check permissions
  const permission = await hasRole("club_admin");
  if (!permission.allowed) {
    return NextResponse.json(
      { error: permission.reason || "Unauthorized" },
      { status: 403 }
    );
  }

  try {
    const { id } = params;

    const user = await prisma.user.findUnique({
      where: { id },
      include: {
        player: true,
      },
    });

    if (!user) {
      return NextResponse.json(
        { error: "User not found" },
        { status: 404 }
      );
    }

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