"use client";

import PageHeading from "../ui/PageHeading";

import { useEffect, useState } from "react";
import { useRouter } from "next/navigation";
import { authFetchOrThrow, getApiBase, getToken, UnauthorizedError } from "../lib/auth";

type Profile = {
  username?: string;
};

export default function FeedbackPage() {
  const router = useRouter();
  const [profile, setProfile] = useState<Profile | null>(null);
  const [category, setCategory] = useState("bug");
  const [message, setMessage] = useState("");
  const [status, setStatus] = useState<string | null>(null);
  const [submitting, setSubmitting] = useState(false);

  useEffect(() => {
    if (!getToken()) {
      router.push("/login");
      return;
    }
    const load = async () => {
      try {
        const baseUrl = getApiBase();
        const response = await authFetchOrThrow(`${baseUrl}/auth/me`);
        if (!response.ok) {
          throw new Error("Could not load profile.");
        }
        const data = await response.json();
        setProfile({ username: data?.username });
      } catch (error) {
        if (error instanceof UnauthorizedError) {
          router.push("/login");
          return;
        }
        console.error(error);
      }
    };
    void load();
  }, [router]);

  const submit = async (event: React.FormEvent<HTMLFormElement>) => {
    event.preventDefault();
    setStatus(null);
    if (!message.trim()) {
      setStatus("Please write a short message before sending.");
      return;
    }
    setSubmitting(true);
    try {
      const baseUrl = getApiBase();
      const response = await authFetchOrThrow(`${baseUrl}/feedback`, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          type: category,
          message: message.trim(),
        }),
      });
      if (!response.ok) {
        const text = await response.text();
        throw new Error(text || `Request failed: ${response.status}`);
      }
      setMessage("");
      setStatus("Thanks! Your message has been sent.");
    } catch (error) {
      if (error instanceof UnauthorizedError) {
        router.push("/login");
        return;
      }
      console.error(error);
      setStatus("That did not send. Please try again.");
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <main className="card feedback-page">
      <PageHeading title="Feedback" description="Share an idea or tell us what could work better." />

      <form className="account-panel account-form feedback-form" onSubmit={submit}>
        <label htmlFor="feedback-user">Your username</label>
        <input id="feedback-user" value={profile?.username ?? ""} readOnly />

        <label htmlFor="feedback-type">What is this about?</label>
        <select id="feedback-type" value={category} onChange={(event) => setCategory(event.target.value)}>
          <option value="bug">Bug (something is broken)</option>
          <option value="feature">Feature idea (new option)</option>
        </select>

        <label htmlFor="feedback-message">Tell us what happened</label>
        <textarea
          id="feedback-message"
          rows={6}
          value={message}
          onChange={(event) => setMessage(event.target.value)}
          placeholder="Write the details here..."
        />

        {status && <div className="status-banner">{status}</div>}

        <button type="submit" disabled={submitting}>
          {submitting ? "Sending..." : "Send feedback"}
        </button>
      </form>
    </main>
  );
}