import crypto from "node:crypto";
import bcrypt from "bcryptjs";
import { type NextRequest, NextResponse } from "next/server";
import { prisma } from "../../../lib/prisma";
import { resetPasswordSchema, validateInput } from "../../../lib/validation";

export async function POST(request: NextRequest) {
  try {
    const body = await request.json();

    // Validate input with strong password requirements
    const validation = validateInput(resetPasswordSchema, body);
    if (!validation.success) {
      return NextResponse.json(
        {
          success: false,
          error: "Validation failed",
          details: validation.errors,
        },
        { status: 400 }
      );
    }

    const { token, password } = validation.data;

    // Hash the token to compare with stored hash
    const tokenHash = crypto.createHash("sha256").update(token).digest("hex");

    const user = await prisma.user.findFirst({
      where: {
        resetToken: tokenHash,
        resetTokenExpiry: { gte: new Date() },
      },
    });

    if (!user) {
      return NextResponse.json(
        {
          success: false,
          error:
            "Invalid or expired token. Please request a new password reset.",
        },
        { status: 400 }
      );
    }

    // Hash password with higher rounds for better security
    const hashedPassword = await bcrypt.hash(password, 12);

    await prisma.user.update({
      where: { id: user.id },
      data: {
        password: hashedPassword,
        resetToken: null,
        resetTokenExpiry: null,
      },
    });

    return NextResponse.json(
      {
        success: true,
        message: "Password has been reset successfully.",
      },
      { status: 200 }
    );
  } catch (error) {
    console.error("Reset password error:", error);
    return NextResponse.json(
      {
        success: false,
        error: "An internal server error occurred. Please try again later.",
      },
      { status: 500 }
    );
  }
}