"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { apiUpdateProfile, type User } from "@/lib/api";

interface ProfileFormProps {
  user: User;
}

/**
 * 个人资料编辑表单：昵称、头像 URL、邮箱、签名。
 * 提交成功后刷新 layout 使 Header 同步最新昵称/头像，并在页面内显示成功提示。
 */
export default function ProfileForm({ user }: ProfileFormProps) {
  const router = useRouter();
  const [nickname, setNickname] = useState(user.nickname || "");
  const [avatar, setAvatar] = useState(user.avatar || "");
  const [email, setEmail] = useState(user.email || "");
  const [signature, setSignature] = useState(user.signature || "");
  const [submitting, setSubmitting] = useState(false);
  const [error, setError] = useState("");
  const [success, setSuccess] = useState("");

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError("");
    setSuccess("");

    const trimmed = nickname.trim();
    if (!trimmed) {
      setError("昵称不能为空");
      return;
    }
    if (trimmed.length > 64) {
      setError("昵称不能超过 64 个字符");
      return;
    }
    if (signature.length > 255) {
      setError("签名不能超过 255 个字符");
      return;
    }

    setSubmitting(true);
    try {
      const res = await apiUpdateProfile({
        nickname: trimmed,
        avatar: avatar.trim(),
        email: email.trim(),
        signature,
      });
      if (res.user) {
        setSuccess("资料已保存");
        // 刷新 layout 让 Header 同步最新昵称/头像
        router.refresh();
      } else {
        setError(res.error || "保存失败");
      }
    } catch {
      setError("网络错误，请重试");
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <>
      <p className="font-bold text-[15px] mb-3.5" style={{ color: "var(--ink)" }}>
        个人资料
      </p>

      <form onSubmit={handleSubmit} className="panel p-5 sm:p-6 space-y-5">
        {success && <div className="alert-ok" role="status">{success}</div>}
        {error && <div className="alert-error" role="alert">{error}</div>}

        <div>
          <label className="field-label" htmlFor="pf-nickname">昵称</label>
          <input
            id="pf-nickname"
            type="text"
            value={nickname}
            onChange={(e) => setNickname(e.target.value)}
            required
            maxLength={64}
            className="field"
            placeholder="请输入昵称"
          />
        </div>

        <div>
          <label className="field-label" htmlFor="pf-avatar">头像链接</label>
          <input
            id="pf-avatar"
            type="url"
            value={avatar}
            onChange={(e) => setAvatar(e.target.value)}
            maxLength={512}
            className="field"
            placeholder="https://example.com/avatar.png"
          />
          <p className="meta mt-2">填写图片 URL，留空则使用默认字母头像</p>
        </div>

        <div>
          <label className="field-label" htmlFor="pf-email">邮箱</label>
          <input
            id="pf-email"
            type="email"
            value={email}
            onChange={(e) => setEmail(e.target.value)}
            maxLength={128}
            className="field"
            placeholder="your@email.com"
          />
        </div>

        <div>
          <label className="field-label" htmlFor="pf-signature">
            个性签名
            <span className="font-normal ml-1.5" style={{ color: "var(--ink-3)" }}>
              ({signature.length}/255)
            </span>
          </label>
          <textarea
            id="pf-signature"
            value={signature}
            onChange={(e) => setSignature(e.target.value)}
            maxLength={255}
            rows={3}
            className="field"
            placeholder="介绍一下自己吧"
          />
        </div>

        <button
          type="submit"
          disabled={submitting}
          className="btn btn-primary w-full justify-center mt-1"
        >
          {submitting ? "保存中..." : "保存资料"}
        </button>
      </form>
    </>
  );
}