import { useCallback, useEffect, useState, type FormEvent } from "react";
import { createPortal } from "react-dom";
import { X } from "lucide-react";
import { postVisitorSessionQuestion } from "../lib/api";
import { getAttendeeToken } from "../lib/attendeeAuth";
import { notifyRewardFromApiData } from "../lib/rewardCelebration";

type AskQuestionModalProps = {
  open: boolean;
  onClose: () => void;
  eventId: string;
  sessionId: string;
  idSuffix?: string;
};

export function AskQuestionModal({
  open,
  onClose,
  eventId,
  sessionId,
  idSuffix = "",
}: AskQuestionModalProps) {
  const [draft, setDraft] = useState("");
  const [submitting, setSubmitting] = useState(false);
  const [submitError, setSubmitError] = useState<string | null>(null);
  const inputId = `session-question-input${idSuffix}`;

  const close = useCallback(() => {
    onClose();
    setDraft("");
    setSubmitError(null);
  }, [onClose]);

  useEffect(() => {
    if (!open) return;
    const onKey = (e: KeyboardEvent) => {
      if (e.key === "Escape") close();
    };
    document.addEventListener("keydown", onKey);
    return () => document.removeEventListener("keydown", onKey);
  }, [open, close]);

  const handleSubmit = async (e: FormEvent) => {
    e.preventDefault();
    const text = draft.trim();
    if (!text) return;
    const eid = eventId.trim();
    const sid = sessionId.trim();
    if (!eid || !sid) return;

    setSubmitting(true);
    setSubmitError(null);
    try {
      const token = getAttendeeToken();
      const out = await postVisitorSessionQuestion(sid, eid, {
        question: text,
        isAnonymous: !token,
      });
      notifyRewardFromApiData(out);
      close();
    } catch (err) {
      setSubmitError(err instanceof Error ? err.message : "Could not submit question.");
    } finally {
      setSubmitting(false);
    }
  };

  if (!open) return null;

  return createPortal(
    <div className="fixed inset-0 z-[200] flex items-end justify-center sm:items-center" role="presentation">
      <button
        type="button"
        className="absolute inset-0 bg-black/45"
        aria-label="Close dialog"
        onClick={close}
      />
      <div
        role="dialog"
        aria-modal="true"
        aria-labelledby={`ask-question-title${idSuffix}`}
        className="relative z-10 w-full max-w-[min(100%,402px)] rounded-t-2xl bg-white px-5 pb-8 pt-5 shadow-[0_-8px_32px_rgba(0,0,0,0.12)] sm:mx-4 sm:rounded-2xl sm:shadow-xl"
      >
        <div className="mb-4 flex items-start justify-between gap-3">
          <div className="min-w-0">
            <h3 id={`ask-question-title${idSuffix}`} className="text-lg font-semibold text-[#24282f]">
              Ask a Question
            </h3>
            <p className="mt-1 text-sm leading-snug text-[rgba(36,40,47,0.65)]">
              Submit your question to the session moderator.
            </p>
          </div>
          <button
            type="button"
            className="shrink-0 rounded-full p-1.5 text-[#24282f] hover:bg-[#f2f2f7]"
            aria-label="Close"
            onClick={close}
          >
            <X className="size-5" strokeWidth={2} />
          </button>
        </div>
        <form onSubmit={handleSubmit} className="flex flex-col gap-4">
          <label className="sr-only" htmlFor={inputId}>
            Your question
          </label>
          <textarea
            id={inputId}
            value={draft}
            onChange={(e) => setDraft(e.target.value)}
            placeholder="Type your question here..."
            rows={5}
            disabled={submitting}
            className="min-h-[120px] w-full resize-y rounded-xl border border-[#c7c7cc] bg-[#f2f2f7]/40 px-3 py-3 text-sm text-[#24282f] placeholder:text-[rgba(36,40,47,0.45)] focus:border-[#ef8d1d] focus:outline-none focus:ring-2 focus:ring-[#ef8d1d]/30 disabled:opacity-60"
          />
          {submitError ? <p className="text-sm text-red-600">{submitError}</p> : null}
          <button
            type="submit"
            disabled={submitting}
            className="w-full rounded-xl bg-[#ef8d1d] py-3 text-sm font-semibold text-white shadow-[0_4px_4px_rgba(0,0,0,0.12)] transition hover:bg-[#e0800c] active:scale-[0.99] disabled:opacity-60"
          >
            {submitting ? "Submitting…" : "Submit Question"}
          </button>
        </form>
      </div>
    </div>,
    document.body,
  );
}