"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";

export default function RegisterPage() {
  const router = useRouter();
  const [form, setForm] = useState({
    username: "",
    email: "",
    password: "",
    confirmPassword: "",
  });
  const [error, setError] = useState("");

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

    if (form.password !== form.confirmPassword) {
      setError("两次输入的密码不一致");
      return;
    }

    const res = await fetch("/api/proxy/auth/register", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        username: form.username,
        email: form.email,
        password: form.password,
      }),
    });

    if (!res.ok) {
      const data = await res.json();
      setError(data.error || "注册失败");
      return;
    }

    router.push("/login");
  }

  return (
    <div className="flex min-h-screen items-center justify-center bg-gray-50 p-4">
      <Card className="w-full max-w-md">
        <CardHeader>
          <CardTitle className="text-center">注册</CardTitle>
        </CardHeader>
        <CardContent className="space-y-4">
          <form onSubmit={handleSubmit} className="space-y-4">
            <div>
              <Label htmlFor="username">用户名</Label>
              <Input
                id="username"
                value={form.username}
                onChange={(e) => setForm({ ...form, username: e.target.value })}
                required
              />
            </div>
            <div>
              <Label htmlFor="email">邮箱</Label>
              <Input
                id="email"
                type="email"
                value={form.email}
                onChange={(e) => setForm({ ...form, email: e.target.value })}
                required
              />
            </div>
            <div>
              <Label htmlFor="password">密码</Label>
              <Input
                id="password"
                type="password"
                value={form.password}
                onChange={(e) => setForm({ ...form, password: e.target.value })}
                required
              />
            </div>
            <div>
              <Label htmlFor="confirmPassword">确认密码</Label>
              <Input
                id="confirmPassword"
                type="password"
                value={form.confirmPassword}
                onChange={(e) =>
                  setForm({ ...form, confirmPassword: e.target.value })
                }
                required
              />
            </div>
            {error && <p className="text-sm text-red-500">{error}</p>}
            <Button type="submit" className="w-full">
              注册
            </Button>
          </form>

          <p className="text-center text-sm text-gray-500">
            已有账号？{" "}
            <a href="/login" className="text-blue-600 hover:underline">
              去登录
            </a>
          </p>
        </CardContent>
      </Card>
    </div>
  );
}