"use client";

import { useState } from "react";
import { useAuth } from "@/lib/auth";
import { useRouter } from "next/navigation";
import Link from "next/link";

export default function RegisterPage() {
  const { register } = useAuth();
  const router = useRouter();
  const [email, setEmail] = useState("");
  const [password, setPassword] = useState("");
  const [inviteCode, setInviteCode] = useState("");
  const [error, setError] = useState("");
  const [loading, setLoading] = useState(false);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError("");
    if (password.length < 6) {
      setError("密码至少6位");
      return;
    }
    setLoading(true);
    try {
      await register(email, password, inviteCode);
      router.push("/");
    } catch (err: any) {
      setError(err.message || "注册失败");
    } finally {
      setLoading(false);
    }
  };

  return (
    <div className="min-h-screen bg-slate-50 flex items-center justify-center p-4">
      <div className="w-full max-w-md">
        <div className="bg-white rounded-xl shadow-sm border border-slate-200 p-8">
          <div className="text-center mb-8">
            <h1 className="text-2xl font-bold text-slate-800">⚡ Arbitrage Engine</h1>
            <p className="text-slate-500 text-sm mt-2">注册新账户（需要邀请码）</p>
          </div>

          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <label className="block text-sm font-medium text-slate-700 mb-1">邀请码</label>
              <input
                type="text" value={inviteCode} onChange={e => setInviteCode(e.target.value.toUpperCase())}
                className="w-full px-3 py-2 border border-slate-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent font-mono tracking-wider"
                placeholder="输入邀请码" required
              />
            </div>
            <div>
              <label className="block text-sm font-medium text-slate-700 mb-1">邮箱</label>
              <input
                type="email" value={email} onChange={e => setEmail(e.target.value)}
                className="w-full px-3 py-2 border border-slate-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                placeholder="you@example.com" required
              />
            </div>
            <div>
              <label className="block text-sm font-medium text-slate-700 mb-1">密码</label>
              <input
                type="password" value={password} onChange={e => setPassword(e.target.value)}
                className="w-full px-3 py-2 border border-slate-300 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
                placeholder="至少6位" required minLength={6}
              />
            </div>

            {error && <p className="text-red-500 text-sm">{error}</p>}

            <button
              type="submit" disabled={loading}
              className="w-full bg-blue-600 hover:bg-blue-700 text-white py-2.5 rounded-lg font-medium text-sm transition-colors disabled:opacity-50"
            >
              {loading ? "注册中..." : "注册"}
            </button>
          </form>

          <p className="text-center text-sm text-slate-500 mt-6">
            已有账户？{" "}
            <Link href="/login" className="text-blue-600 hover:underline">登录</Link>
          </p>
        </div>
      </div>
    </div>
  );
}