// dashboard/src/components/observation/ObservationResultCard.tsx
//
// 观测数据下载结果卡片 —— 可复用渲染 ObservationBatch
//
// 用途：
//   1. 观测数据面板的"检索下载"视图在下载完成后展示结果
//   2. （可选）SpecialToolRenderers 的 FindObservationCard 可改为薄封装调用本组件
//
// 视觉与 SpecialToolRenderers::FindObservationCard 保持一致，统一数据源主题色。
import { useState } from 'react';
import {
  Activity,
  CheckCircle2,
  AlertTriangle,
  Download,
  LineChart,
  Loader2,
} from 'lucide-react';
import {
  SOURCE_THEME,
  PRODUCT_LABEL,
  formatFileSize,
  canPreview,
  type ObservationBatchResult,
} from './constants';
import { ObservationPreviewRenderer } from './ObservationPreviewRenderer';
import { useObservationPreview } from './useObservationPreview';

interface ObservationResultCardProps {
  result: ObservationBatchResult;
}

export function ObservationResultCard({ result }: ObservationResultCardProps) {
  const {
    source,
    product,
    ra,
    dec,
    radius_deg,
    matched_count,
    products = [],
    failures = [],
  } = result;
  const theme = SOURCE_THEME[source] ?? SOURCE_THEME.lamost;
  const productLabel = PRODUCT_LABEL[product.product] ?? product.product;
  const hasResult = products.length > 0 || failures.length > 0;

  // 预览：自包含 hook，面板流 + Agent 流共用（两者都渲染本卡片）
  const { fetchPreview, getPreview } = useObservationPreview();
  const [expanded, setExpanded] = useState<Record<string, boolean>>({});

  return (
    <div className="bg-slate-50/60 border border-slate-200 rounded-lg p-3.5 space-y-3 text-xs shadow-2xs">
      {/* 标题栏：数据源 + 产品类型双标签 */}
      <div className="flex items-center justify-between border-b border-slate-200/70 pb-2">
        <div className="flex items-center gap-1.5 font-bold text-slate-800 text-[11px] uppercase tracking-wide">
          <Activity className="w-3.5 h-3.5 text-slate-500" />
          <span>观测数据下载</span>
        </div>
        <div className="flex items-center gap-1">
          <span
            className={`px-2 py-0.5 rounded text-[10px] font-bold ${theme.badge}`}
          >
            {theme.label}
          </span>
          <span className="px-2 py-0.5 rounded text-[10px] font-bold bg-slate-200 text-slate-700">
            {productLabel}
            {product.subtype ? ` · ${product.subtype}` : ''}
          </span>
        </div>
      </div>

      {/* 查询信息 */}
      <div className="flex flex-wrap items-center gap-x-3 gap-y-1 text-[10px] text-slate-600">
        {ra !== undefined && dec !== undefined && (
          <span className="font-mono">
            ra={ra.toFixed(4)} dec={dec.toFixed(4)}
            {radius_deg !== undefined ? ` r=${radius_deg}°` : ''}
          </span>
        )}
        <span className="bg-slate-200 text-slate-700 px-1.5 py-0.5 rounded font-medium">
          命中 {matched_count} 条
        </span>
        {products.length > 0 && (
          <span className="flex items-center gap-0.5 text-emerald-600 font-medium">
            <CheckCircle2 className="w-3 h-3" />
            下载 {products.length}
          </span>
        )}
        {failures.length > 0 && (
          <span className="flex items-center gap-0.5 text-rose-600 font-medium">
            <AlertTriangle className="w-3 h-3" />
            失败 {failures.length}
          </span>
        )}
      </div>

      {/* 产物列表（每个 product 含 1~N 个 artifact） */}
      {products.map((p, i) => {
        const allCached =
          p.artifacts.length > 0 && p.artifacts.every((a) => a.cached);
        return (
          <div
            key={i}
            className="border border-slate-200 rounded bg-white p-2.5 space-y-1.5"
          >
            <div className="flex items-center justify-between">
              <span className="font-mono font-medium text-slate-700">
                {p.source_label}
              </span>
              {allCached ? (
                <span className="flex items-center gap-0.5 text-[10px] text-emerald-600">
                  <CheckCircle2 className="w-3 h-3" />
                  缓存
                </span>
              ) : (
                <span className="text-[10px] text-slate-400">新下载</span>
              )}
            </div>
            {/* 多 artifact 展示（Gaia 光变 G/BP/RP 三波段） */}
            {p.artifacts.map((a, ai) => {
              const previewKey = `${p.source_id}#${ai}`;
              const previewable = canPreview(product.product, a.file_format);
              const isOpen = expanded[previewKey] ?? false;
              const previewState = getPreview(p.source_id, ai);
              const togglePreview = () => {
                const next = !isOpen;
                setExpanded((m) => ({ ...m, [previewKey]: next }));
                if (next && !previewState.data && !previewState.loading) {
                  fetchPreview(
                    source,
                    product.product,
                    product.subtype,
                    p.source_id,
                    ai
                  );
                }
              };
              return (
                <div key={ai} className="space-y-1">
                  <div className="flex items-center justify-between text-[10px] pl-2 border-l-2 border-slate-100">
                    <span className="text-slate-500 flex items-center gap-1">
                      {a.band && (
                        <span className="px-1 py-0.5 rounded bg-violet-100 text-violet-700 font-medium">
                          {a.band}
                        </span>
                      )}
                      {a.file_format.toUpperCase()} ·{' '}
                      {formatFileSize(a.size_bytes)}
                    </span>
                    <span className="flex items-center gap-1">
                      {previewable && (
                        <button
                          onClick={togglePreview}
                          className="flex items-center gap-0.5 font-medium text-slate-500 hover:text-slate-800 transition-colors"
                          title="预览"
                        >
                          {previewState.loading ? (
                            <Loader2 className="w-3 h-3 animate-spin" />
                          ) : (
                            <LineChart className="w-3 h-3" />
                          )}
                          <span>预览</span>
                        </button>
                      )}
                      <a
                        href={a.file_url}
                        target="_blank"
                        rel="noopener noreferrer"
                        className="flex items-center gap-0.5 font-bold text-sky-600 hover:text-sky-800 hover:underline"
                      >
                        <Download className="w-3 h-3" />
                        <span>{a.file_format.toUpperCase()}</span>
                      </a>
                    </span>
                  </div>
                  {/* 预览图（按 product 类型分发渲染） */}
                  {previewable && isOpen && (
                    <div className="pl-2">
                      {previewState.error ? (
                        <p className="text-[10px] text-rose-500 py-1">
                          {previewState.error}
                        </p>
                      ) : previewState.data ? (
                        <ObservationPreviewRenderer
                          preview={previewState.data}
                        />
                      ) : previewState.loading ? (
                        <div className="flex items-center gap-1 text-[10px] text-slate-400 py-4 justify-center">
                          <Loader2 className="w-3 h-3 animate-spin" />
                          解析 FITS 中...
                        </div>
                      ) : null}
                    </div>
                  )}
                </div>
              );
            })}
          </div>
        );
      })}

      {/* 失败列表 */}
      {failures.map((f, i) => (
        <div
          key={`f${i}`}
          className="border border-rose-200 rounded bg-rose-50/50 p-2.5"
        >
          <div className="flex items-center gap-1 text-rose-700 font-medium">
            <AlertTriangle className="w-3 h-3" />
            <span className="font-mono text-[10px]">{f.source_label}</span>
          </div>
          <p className="text-[10px] text-rose-600 mt-1 break-all">{f.error}</p>
        </div>
      ))}

      {!hasResult && (
        <p className="text-[11px] text-slate-400 italic py-2">
          (该区域无{productLabel}数据覆盖)
        </p>
      )}
    </div>
  );
}