"use client";

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

export default function ResetPasswordPage() {
  return (
    <Suspense>
      <ResetPasswordForm />
    </Suspense>
  );
}

function ResetPasswordForm() {
  const searchParams = useSearchParams();
  const token = searchParams.get("token");

  const [password, setPassword] = useState("");
  const [confirmPassword, setConfirmPassword] = useState("");
  const [loading, setLoading] = useState(false);
  const [error, setError] = useState("");
  const [success, setSuccess] = useState(false);

  const passwordValid = password.length >= 8;
  const passwordsMatch = password === confirmPassword;

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault();
    setError("");

    if (!passwordValid) {
      setError("Password must be at least 8 characters");
      return;
    }
    if (!passwordsMatch) {
      setError("Passwords do not match");
      return;
    }
    if (!token) {
      setError("Invalid reset link");
      return;
    }

    setLoading(true);

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

      if (!res.ok) {
        const data: { error?: string } = await res.json();
        setError(data.error ?? "Something went wrong");
        setLoading(false);
        return;
      }

      setSuccess(true);
    } catch {
      setError("Something went wrong. Please try again.");
      setLoading(false);
    }
  }

  if (!token) {
    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-emerald-400 to-emerald-600 flex items-center justify-center shadow-lg shadow-emerald-500/20">
            <Activity className="w-6 h-6 text-white" />
          </div>
          <div className="text-center">
            <h1 className="text-2xl font-bold text-neutral-100">
              Invalid reset link
            </h1>
            <p className="mt-1 text-sm text-neutral-400">
              This password reset link is invalid or has expired.
            </p>
          </div>
        </div>

        <p className="text-center text-sm text-neutral-400">
          <Link
            href="/forgot-password"
            className="text-emerald-400 hover:text-emerald-300 font-medium transition-colors"
          >
            Request a new reset link
          </Link>
        </p>
      </div>
    );
  }

  if (success) {
    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-emerald-400 to-emerald-600 flex items-center justify-center shadow-lg shadow-emerald-500/20">
            <Activity className="w-6 h-6 text-white" />
          </div>
          <div className="text-center">
            <h1 className="text-2xl font-bold text-neutral-100">
              Password reset
            </h1>
            <p className="mt-1 text-sm text-neutral-400">
              Your password has been successfully reset.
            </p>
          </div>
        </div>

        <p className="text-center text-sm text-neutral-400">
          <Link
            href="/login"
            className="text-emerald-400 hover:text-emerald-300 font-medium transition-colors"
          >
            Sign in with your new password
          </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-emerald-400 to-emerald-600 flex items-center justify-center shadow-lg shadow-emerald-500/20">
          <Activity className="w-6 h-6 text-white" />
        </div>
        <div className="text-center">
          <h1 className="text-2xl font-bold text-neutral-100">
            Set new password
          </h1>
          <p className="mt-1 text-sm text-neutral-400">
            Enter your new password below
          </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="password"
              className="block text-sm font-medium text-neutral-300"
            >
              New password
            </label>
            <input
              id="password"
              type="password"
              autoComplete="new-password"
              required
              value={password}
              onChange={(e) => setPassword(e.target.value)}
              placeholder="••••••••"
              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",
                password && !passwordValid
                  ? "border-red-500/50 focus:border-red-500"
                  : "border-neutral-800 focus:border-emerald-500"
              )}
            />
            {password && !passwordValid && (
              <p className="text-xs text-red-400">
                Password must be at least 8 characters
              </p>
            )}
          </div>

          <div className="space-y-2">
            <label
              htmlFor="confirmPassword"
              className="block text-sm font-medium text-neutral-300"
            >
              Confirm password
            </label>
            <input
              id="confirmPassword"
              type="password"
              autoComplete="new-password"
              required
              value={confirmPassword}
              onChange={(e) => setConfirmPassword(e.target.value)}
              placeholder="••••••••"
              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",
                confirmPassword && !passwordsMatch
                  ? "border-red-500/50 focus:border-red-500"
                  : "border-neutral-800 focus:border-emerald-500"
              )}
            />
            {confirmPassword && !passwordsMatch && (
              <p className="text-xs text-red-400">Passwords do not match</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-emerald-500/50 text-neutral-950/50 cursor-not-allowed"
              : "bg-emerald-500 hover:bg-emerald-400 text-neutral-950"
          )}
        >
          {loading && <Loader2 className="w-4 h-4 animate-spin" />}
          {loading ? "Resetting..." : "Reset password"}
        </button>
      </form>

      <p className="text-center text-sm text-neutral-400">
        Remember your password?{" "}
        <Link
          href="/login"
          className="text-emerald-400 hover:text-emerald-300 font-medium transition-colors"
        >
          Sign in
        </Link>
      </p>
    </div>
  );
}
