import { useState, type ChangeEvent, type SubmitEvent } from "react";
import { RiLoader5Fill } from "@remixicon/react";

import { add } from "~/components/ui/notice/utils";
import { useIsLogin } from "~/composables/use-is-login";
import { clsn } from "~/utils";
import { getAuthorInfo, setAuthorInfo } from "~/utils/comment";

export interface CommentFormSubmitValues {
  name: string;
  email: string;
  site: string;
  content: string;
  root?: string;
  parent?: string;
}

interface CommentFormProps {
  className?: string;
  parent?: string;
  root?: string;
  onSubmit: (values: CommentFormSubmitValues) => Promise<unknown>;
}

export default function CommentForm({ className, parent, root, onSubmit }: CommentFormProps) {
  const isLogin = useIsLogin();
  const [loading, setLoading] = useState(false);
  const [input, setInput] = useState(() => ({
    ...getAuthorInfo(),
    content: "",
  }));

  const onChange = (ev: ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) => {
    const { name, value } = ev.target;
    setInput((prev) => ({ ...prev, [name]: value }));
  };

  const onFormSubmit = (ev: SubmitEvent) => {
    ev.preventDefault();

    if (!isLogin && (!input.name || !input.email || !input.content)) {
      add({
        title: "评论失败",
        type: "error",
        content: "缺少必填项",
      });

      return;
    }

    if (!input.content) {
      add({
        title: "评论失败",
        type: "error",
        content: "缺少必填项",
      });

      return;
    }

    setAuthorInfo({
      name: input.name,
      email: input.email,
      site: input.site,
    });

    setLoading(true);

    onSubmit({
      ...input,
      root,
      parent,
    }).then(() => {
      setInput((prev) => ({ ...prev, content: "" }));
      setLoading(false);
    }).catch(() => {
      setLoading(false);
    });
  };

  const inputClass = "w-full px-3 py-2.5 rounded-xl bg-white border-4 border-gray-200 focus:border-pink-400 outline-none transition-colors placeholder:text-neutral-400";
  const labelClass = "block text-sm font-medium mb-2 text-neutral-500";

  if (isLogin) {
    return (
      <form className={clsn("mb-8", className)} onSubmit={onFormSubmit}>
        <div className="mb-4">
          <h3 className="text-pink-400 font-bold text-lg mb-1">欢迎回来！</h3>
        </div>
        <div className="mb-4">
          <textarea
            name="content"
            className={clsn(inputClass, "min-h-[7em] resize-y")}
            placeholder="评论"
            rows={3}
            required
            value={input.content}
            onChange={onChange}
          />
        </div>
        <button
          type="submit"
          className="inline-flex items-center justify-center px-6 py-3 rounded-xl bg-pink-400 text-white font-medium hover:bg-pink-500 transition-colors cursor-pointer disabled:opacity-60 disabled:cursor-not-allowed"
          disabled={loading}
        >
          {loading && <RiLoader5Fill className="animate-spin mr-2" />}
          提交
        </button>
      </form>
    );
  }

  return (
    <form className={clsn("mb-8", className)} onSubmit={onFormSubmit}>
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4 mb-4">
        <div className="flex flex-col gap-4">
          <div>
            <label className={labelClass}>昵称</label>
            <input
              type="text"
              name="name"
              className={inputClass}
              placeholder="园友"
              required
              value={input.name}
              onChange={onChange}
            />
          </div>
          <div>
            <label className={labelClass}>邮箱</label>
            <input
              type="email"
              name="email"
              className={inputClass}
              placeholder="user@example.com"
              required
              value={input.email}
              onChange={onChange}
            />
          </div>
          <div>
            <label className={labelClass}>站点</label>
            <input
              type="url"
              name="site"
              className={inputClass}
              placeholder="https://example.com"
              value={input.site}
              onChange={onChange}
            />
          </div>
        </div>
        <div className="flex flex-col gap-4 md:h-full">
          <div className="flex flex-col flex-1 min-h-0">
            <label className={labelClass}>评论</label>
            <textarea
              name="content"
              className={clsn(inputClass, "md:flex-1 resize-y")}
              placeholder="注意言行举止，来做评论排行榜的前十名吧~"
              rows={3}
              required
              value={input.content}
              onChange={onChange}
            />
          </div>
          <button
            type="submit"
            className="w-full inline-flex items-center justify-center px-6 py-2.5 rounded-xl border-4 border-transparent bg-pink-400 text-white font-medium hover:bg-pink-500 transition-colors cursor-pointer disabled:opacity-60 disabled:cursor-not-allowed"
            disabled={loading}
          >
            {loading && <RiLoader5Fill className="animate-spin mr-2" />}
            提交
          </button>
        </div>
      </div>
    </form>
  );
}