import { NextResponse } from "next/server";
import { getCollection } from "@/lib/mongodb";
import bcrypt from "bcryptjs";

// GET - Fetch all users
export async function GET(request: Request) {
  try {
    const { searchParams } = new URL(request.url);
    const countOnly = searchParams.get("count") === "true";

    const usersCollection = await getCollection<any>("users");

    if (countOnly) {
      const total = await usersCollection.countDocuments({});
      return NextResponse.json({ count: total });
    }

    const users = await usersCollection.find({}).sort({ createdAt: -1 }).toArray();

    return NextResponse.json({
      users: users.map((user: any) => ({
        ...user,
        _id: user._id.toString(),
        password: undefined, // Don't send password
      })),
    });
  } catch (error) {
    console.error("Error fetching users:", error);
    return NextResponse.json(
      {
        error: "Failed to fetch users",
        details: error instanceof Error ? error.message : "Unknown error",
      },
      { status: 500 }
    );
  }
}

// POST - Create a new user
export async function POST(request: Request) {
  try {
    const body = await request.json();
    const { name, email, password, role, status, phone, address } = body;

    // Validate required fields
    if (!name || !email || !password) {
      return NextResponse.json(
        { error: "Name, email, and password are required" },
        { status: 400 }
      );
    }

    const usersCollection = await getCollection<any>("users");

    // Check if user already exists
    const existingUser = await usersCollection.findOne({ email });
    if (existingUser) {
      return NextResponse.json(
        { error: "User with this email already exists" },
        { status: 400 }
      );
    }

    // Hash password
    const hashedPassword = await bcrypt.hash(password, 10);

    // Create user
    const userData = {
      name,
      email,
      password: hashedPassword,
      role: role || "user",
      status: status || "active",
      phone: phone || "",
      address: address || "",
      createdAt: new Date().toISOString(),
      updatedAt: new Date().toISOString(),
    };

    const result = await usersCollection.insertOne(userData);

    if (!result.acknowledged) {
      throw new Error("Failed to create user");
    }

    return NextResponse.json(
      {
        success: true,
        message: "User created successfully",
        user: {
          ...userData,
          _id: result.insertedId.toString(),
          password: undefined,
        },
      },
      { status: 201 }
    );
  } catch (error) {
    console.error("Error creating user:", error);
    return NextResponse.json(
      {
        error: "Failed to create user",
        details: error instanceof Error ? error.message : "Unknown error",
      },
      { status: 500 }
    );
  }
}