/**
 * Flock 查价可视化进度（以 Worker 回写的 rpa_stage 为准，失败时标出卡点）
 */
"use client";

import { useEffect, useState } from "react";
import { LoadingSpinner } from "@/components/ui/loading-spinner";
import {
  FLOCK_RPA_STAGE_LABELS,
  FLOCK_RPA_STAGES,
  flockStageIndex,
  mapFlockErrorToStage,
  type FlockRpaStage,
} from "@/lib/flock/rpa-progress";

const DISPLAY_STAGES: FlockRpaStage[] = [
  "queued",
  "lock",
  "login",
  "open_quote",
  "fill_form",
  "submit",
  "wait_quote",
];

export interface FlockQuoteProgressProps {
  active: boolean;
  quoteId?: string | null;
  startedAtMs?: number | null;
  /** Worker 回写阶段 */
  rpaStage?: string | null;
  rpaStageLabel?: string | null;
  /** 失败后的错误原文（用于把进度钉在卡点并展示 hint） */
  errorMessage?: string | null;
  failed?: boolean;
}

export function FlockQuoteProgress({
  active,
  quoteId,
  startedAtMs,
  rpaStage,
  rpaStageLabel,
  errorMessage,
  failed = false,
}: FlockQuoteProgressProps) {
  const [now, setNow] = useState(() => Date.now());

  useEffect(() => {
    if (!active && !failed) return;
    const t = window.setInterval(() => setNow(Date.now()), 500);
    return () => window.clearInterval(t);
  }, [active, failed]);

  if (!active && !failed) return null;

  const mapped = failed ? mapFlockErrorToStage(errorMessage) : null;
  // 优先 Worker 回写的 rpa_stage；禁止失败时用默认「互斥锁」覆盖真实进度
  const stageRaw = (
    rpaStage && (FLOCK_RPA_STAGES as readonly string[]).includes(rpaStage)
      ? rpaStage
      : (mapped?.stage ?? "queued")
  ) as string;
  const currentStage: FlockRpaStage = (
    FLOCK_RPA_STAGES as readonly string[]
  ).includes(stageRaw)
    ? (stageRaw as FlockRpaStage)
    : "queued";
  const currentIdx = Math.max(0, flockStageIndex(currentStage));
  const label =
    (failed ? mapped?.hint : null) ??
    rpaStageLabel ??
    FLOCK_RPA_STAGE_LABELS[currentStage];
  const elapsed = Math.max(0, now - (startedAtMs ?? now));

  return (
    <div
      className={[
        "rounded-lg border p-4 shadow-card",
        failed
          ? "border-red-300 bg-red-50"
          : "border-[#1890FF]/25 bg-[#1890FF]/5",
      ].join(" ")}
      role="status"
      aria-live="polite"
      data-testid="flock-quote-progress"
      data-rpa-stage={currentStage}
    >
      <div className="mb-3 flex flex-wrap items-center justify-between gap-2">
        <div
          className={[
            "flex items-center gap-2 text-sm font-semibold",
            failed ? "text-red-700" : "text-[#1F2937]",
          ].join(" ")}
        >
          {!failed ? (
            <LoadingSpinner size={16} className="text-[#1890FF]" />
          ) : null}
          {failed ? "Flock 查价失败 — 已定位卡点" : "正在查询 Flock Freight 实时报价"}
        </div>
        <span className="text-xs tabular-nums text-text-secondary">
          已用时 {(elapsed / 1000).toFixed(1)}s
        </span>
      </div>

      <ol className="space-y-2">
        {DISPLAY_STAGES.map((stage) => {
          const i = flockStageIndex(stage);
          const done = !failed && i < currentIdx;
          const current = i === currentIdx || (failed && stage === currentStage);
          const stuck = failed && stage === currentStage;
          return (
            <li
              key={stage}
              className={[
                "flex items-start gap-2 text-sm",
                stuck
                  ? "font-semibold text-red-600"
                  : current
                    ? "font-medium text-[#1890FF]"
                    : done
                      ? "text-[#1F2937]"
                      : "text-text-disabled",
              ].join(" ")}
            >
              <span aria-hidden className="mt-0.5 w-4 shrink-0 text-center">
                {stuck ? "✕" : done ? "✓" : current ? "●" : "○"}
              </span>
              <span>
                {FLOCK_RPA_STAGE_LABELS[stage]}
                {current && !failed ? "…" : null}
                {stuck ? "（卡在这里）" : null}
              </span>
            </li>
          );
        })}
      </ol>

      <p
        className={[
          "mt-3 text-xs",
          failed ? "font-medium text-red-700" : "text-text-secondary",
        ].join(" ")}
      >
        {label}
      </p>

      {quoteId ? (
        <p className="mt-2 break-all text-[11px] text-text-secondary">
          询价单号：{quoteId}
        </p>
      ) : null}
      {!failed ? (
        <p className="mt-1 text-[11px] text-text-disabled">
          进度由 RPA Worker 实时回写；若长时间停在「登录」，请核对客户 Flock
          账密、JWT_SECRET，或有头模式查看 .rpa/flock-stalls/ 截图。
        </p>
      ) : null}
    </div>
  );
}