"use client";

import { useState } from "react";
import { X } from "lucide-react";

import { REPLY_QUALITY_NOTE_MAX, REPLY_QUALITY_REASON_LABELS, REPLY_QUALITY_REASONS } from "@/lib/reply-quality-labels";
import { notifyError, notifySuccess } from "@/lib/notify";
import { saveReplyQualityReason } from "@/lib/reply-ratings";

const REASONS = REPLY_QUALITY_REASONS.map((key) => [key, REPLY_QUALITY_REASON_LABELS[key]] as const);

/**
 * 不满意原因 after a 👎 (compliance round 2026-09-30). Everything here is
 * optional: the 👎 and the turn's snapshot are already saved when this opens;
 * closing it keeps them. One line says the turn is sent for review. The thanks
 * (or a failure) is a toast; the panel closes itself on success (2026-09-30).
 */
export function ReplyDownReason({ feedbackKey, onClose }: Readonly<{ feedbackKey: string; onClose: () => void }>) {
  const [picked, setPicked] = useState<ReadonlySet<string>>(() => new Set());
  const [note, setNote] = useState("");
  const [state, setState] = useState<"idle" | "sending" | "failed">("idle");

  async function submit() {
    if (state === "sending") return;
    setState("sending");
    const ok = await saveReplyQualityReason(feedbackKey, REASONS.map(([key]) => key).filter((key) => picked.has(key)), note);
    if (ok) {
      notifySuccess("已收到，谢谢。");
      onClose();
      return;
    }
    setState("failed");
    notifyError("没能提交，再试一次。");
  }

  return (
    <div className="reply-down-reason" role="group" aria-label="不满意原因">
      <div className="reply-down-reason-head">
        <span>哪里不满意？可以不选</span>
        <button type="button" className="reply-down-reason-close" aria-label="关闭" onClick={onClose}><X aria-hidden="true" /></button>
      </div>
      <div className="reply-down-reason-chips">
        {REASONS.map(([key, label]) => (
          <button
            key={key}
            type="button"
            aria-pressed={picked.has(key)}
            onClick={() => setPicked((current) => {
              const next = new Set(current);
              if (next.has(key)) next.delete(key); else next.add(key);
              return next;
            })}
          >
            {label}
          </button>
        ))}
      </div>
      <input
        className="reply-down-reason-note"
        type="text"
        value={note}
        maxLength={REPLY_QUALITY_NOTE_MAX}
        placeholder="补充一句（可不填）"
        aria-label="补充说明"
        onChange={(event) => setNote(event.target.value)}
      />
      <div className="reply-down-reason-foot">
        <span>会把这一轮对话发给我们排查</span>
        <button type="button" className="reply-down-reason-send" disabled={state === "sending"} onClick={() => void submit()}>
          {state === "failed" ? "再试一次" : "提交"}
        </button>
      </div>
    </div>
  );
}