"use client";

import { useEffect, useRef, useState } from "react";
import type {
  ChoiceKey,
  RectificationChoiceCard as ChoiceCard,
} from "@/lib/rectification-agentic/v9/choice-card";

type RectificationChoiceCardProps = Readonly<{
  card: ChoiceCard;
  pending: boolean;
  disabled: boolean;
  selectedKey?: ChoiceKey | "stop" | "";
  onSelect: (key: ChoiceKey) => void;
  onStop: () => void;
}>;

export function RectificationChoiceCard(props: RectificationChoiceCardProps) {
  const [localSelected, setLocalSelected] = useState<ChoiceKey | "stop" | "">("");
  const selectedKey = props.selectedKey || localSelected;
  const firstChoiceRef = useRef<HTMLButtonElement | null>(null);
  const answered = Boolean(selectedKey);

  useEffect(() => {
    if (props.pending || answered) return;
    firstChoiceRef.current?.focus();
  }, [answered, props.card.question_id, props.pending]);

  function select(key: ChoiceKey) {
    if (props.pending || props.disabled || selectedKey) return;
    setLocalSelected(key);
    props.onSelect(key);
  }

  function stop() {
    if (props.pending || props.disabled || selectedKey) return;
    setLocalSelected("stop");
    props.onStop();
  }

  return (
    <section
      className={`rectification-choice-card${props.pending ? " is-pending" : ""}${answered ? " is-answered" : ""}`}
      aria-label={props.card.scoring ? "校正判断" : "盘外核对"}
    >
      <fieldset
        className="birth-time-choice-question"
        disabled={props.pending || props.disabled || answered}
        data-answered={answered ? "true" : "false"}
      >
        <legend className="sr-only">{props.card.prompt}</legend>
        {props.card.why ? <p className="rectification-choice-why">{props.card.why}</p> : null}
        <div className="birth-time-primary-choices">
          {props.card.options.map((option, index) => (
            <button
              key={option.key}
              ref={index === 0 ? firstChoiceRef : undefined}
              type="button"
              className="birth-time-choice-option is-primary"
              data-selected={selectedKey === option.key ? "true" : "false"}
              onClick={() => select(option.key)}
            >
              <strong>{option.key}.</strong> {option.label}
            </button>
          ))}
          <button
            type="button"
            className="birth-time-choice-option is-primary"
            data-selected={selectedKey === "stop" ? "true" : "false"}
            onClick={stop}
          >
            {props.card.stop_label}
          </button>
        </div>
      </fieldset>
    </section>
  );
}