// Author: Shiv
// Date: April 2026

"use client";

import dynamic from "next/dynamic";
import Link from "next/link";
import { useState } from "react";

const labelCls = "flex flex-col gap-[0.35rem] text-[0.9rem] font-semibold text-[#444]";
const inputCls = "px-[0.85rem] py-[0.6rem] border border-[#ddd] rounded-lg text-base outline-none transition-all focus:border-[#e68672] focus:shadow-[0_0_0_3px_rgba(230,134,114,0.2)]";
const submitBtnCls = "mt-2 py-3 bg-[#e68672] text-white border-none rounded-lg text-base font-bold cursor-pointer transition-all hover:bg-[#d4705e] active:scale-[0.98] disabled:opacity-60 disabled:cursor-not-allowed";

//Forgot password page, sends a reset link to the user's email
function ForgotPasswordPage() {
  const [usernameOrEmail, setUsernameOrEmail] = useState("");
  const [message, setMessage] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);
  const [submitted, setSubmitted] = useState(false);

  //Sends the forgot password request and hides the form on success
  async function handleSubmit(e) {
    e.preventDefault();
    setError("");
    setMessage("");
    setLoading(true);

    try {
      const res = await fetch("/api/v1/auth/forgot-password", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ usernameOrEmail }),
      });

      const data = await res.json();

      if (!res.ok) {
        throw new Error(data.message || "Something went wrong. Please try again.");
      }

      setMessage(data.message || "If an account matches, a reset link has been sent to your email.");
      setSubmitted(true);
    } catch (err) {
      setError(err.message);
    } finally {
      setLoading(false);
    }
  }

  return (
    <main className="min-h-[calc(100vh-70px)] flex items-center justify-center py-8 px-4 bg-[#fafafa]">
      <div className="bg-white rounded-2xl shadow-[0_4px_24px_rgba(0,0,0,0.1)] p-10 w-full max-w-[440px] max-[480px]:p-6">
        <h1 className="text-[1.75rem] font-bold text-[#222] m-0 mb-6 text-center">Forgot Password</h1>

        {!submitted ? (
          <>
            <p className="text-[#6b7280] mb-5 text-[0.95rem]">
              Enter your username or email address and we&apos;ll send you a link to reset your password.
            </p>

            {error && <p className="bg-[#fff0f0] border border-[#f5c6c6] text-[#c0392b] rounded-lg px-4 py-[0.65rem] text-[0.9rem] mb-2">{error}</p>}

            <form className="flex flex-col gap-4" onSubmit={handleSubmit}>
              <label className={labelCls}>
                Username or Email
                <input className={inputCls} type="text" value={usernameOrEmail} onChange={(e) => setUsernameOrEmail(e.target.value)} required autoComplete="username" />
              </label>

              <button className={submitBtnCls} type="submit" disabled={loading}>
                {loading ? "Sending…" : "Send Reset Link"}
              </button>
            </form>
          </>
        ) : (
          <p className="text-[#16a34a] my-4 leading-relaxed">{message}</p>
        )}

        <p className="text-center text-[0.9rem] text-[#666] mt-5">
          Remember your password?{" "}
          <Link href="/login" className="text-[#e68672] font-semibold no-underline hover:underline">Log in here</Link>
        </p>
        <p className="text-center text-[0.9rem] text-[#666] mt-5">
          Don&apos;t have an account?{" "}
          <Link href="/register" className="text-[#e68672] font-semibold no-underline hover:underline">Register here</Link>
        </p>
      </div>
    </main>
  );
}

export default dynamic(() => Promise.resolve(ForgotPasswordPage), {
  ssr: false,
});