"use client";

import { useState } from "react";
import Link from "next/link";
import { Code2, Loader2 } from "lucide-react";
import { cn } from "@/lib/utils";

export default function ForgotPasswordPage() {
  const [email, setEmail] = useState("");
  const [loading, setLoading] = useState(false);
  const [submitted, setSubmitted] = useState(false);
  const [error, setError] = useState("");
  const emailValid = /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setError("");
    if (!emailValid) { setError("Please enter a valid email address"); return; }
    setLoading(true);
    try {
      const res = await fetch("/api/auth/forgot-password", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ email }) });
      if (!res.ok) { const data: { error?: string } = await res.json(); setError(data.error ?? "Something went wrong"); setLoading(false); return; }
      setSubmitted(true);
    } catch { setError("Something went wrong."); setLoading(false); }
  }

  if (submitted) {
    return (
      <div className="space-y-8">
        <div className="flex flex-col items-center gap-4">
          <div className="w-12 h-12 rounded-xl bg-gradient-to-br from-blue-400 to-blue-600 flex items-center justify-center shadow-lg shadow-blue-500/20"><Code2 className="w-6 h-6 text-white" /></div>
          <div className="text-center">
            <h1 className="text-2xl font-bold text-neutral-100">Check your email</h1>
            <p className="mt-1 text-sm text-neutral-400">If an account exists for that email, we sent a password reset link. It expires in 1 hour.</p>
          </div>
        </div>
        <p className="text-center text-sm text-neutral-400"><Link href="/login" className="text-blue-400 hover:text-blue-300 font-medium transition-colors">Back to sign in</Link></p>
      </div>
    );
  }

  return (
    <div className="space-y-8">
      <div className="flex flex-col items-center gap-4">
        <div className="w-12 h-12 rounded-xl bg-gradient-to-br from-blue-400 to-blue-600 flex items-center justify-center shadow-lg shadow-blue-500/20"><Code2 className="w-6 h-6 text-white" /></div>
        <div className="text-center">
          <h1 className="text-2xl font-bold text-neutral-100">Reset your password</h1>
          <p className="mt-1 text-sm text-neutral-400">Enter your email and we&apos;ll send you a reset link</p>
        </div>
      </div>
      <form onSubmit={handleSubmit} className="space-y-5">
        <div className="rounded-xl bg-neutral-900 border border-neutral-800 p-6 space-y-4">
          <div className="space-y-2">
            <label htmlFor="email" className="block text-sm font-medium text-neutral-300">Email</label>
            <input id="email" type="email" autoComplete="email" required value={email} onChange={(e) => setEmail(e.target.value)} placeholder="you@example.com"
              className={cn("w-full px-3 py-2.5 bg-neutral-950 border rounded-lg text-sm text-neutral-100 placeholder-neutral-500 outline-none transition-colors", email && !emailValid ? "border-red-500/50 focus:border-red-500" : "border-neutral-800 focus:border-blue-500")} />
            {email && !emailValid && <p className="text-xs text-red-400">Please enter a valid email address</p>}
          </div>
        </div>
        {error && (<div className="rounded-lg bg-red-500/10 border border-red-500/20 px-4 py-3"><p className="text-sm text-red-400">{error}</p></div>)}
        <button type="submit" disabled={loading}
          className={cn("w-full flex items-center justify-center gap-2 px-4 py-2.5 rounded-lg text-sm font-semibold transition-colors", loading ? "bg-blue-500/50 text-white/50 cursor-not-allowed" : "bg-blue-500 hover:bg-blue-400 text-white")}>
          {loading && <Loader2 className="w-4 h-4 animate-spin" />}
          {loading ? "Sending..." : "Send reset link"}
        </button>
      </form>
      <p className="text-center text-sm text-neutral-400">Remember your password?{" "}<Link href="/login" className="text-blue-400 hover:text-blue-300 font-medium transition-colors">Sign in</Link></p>
    </div>
  );
}
