"use client";

import { Target, TriangleAlert, X } from "lucide-react";
import { useMemo } from "react";
import type { DetailFeature } from "../types";
import {
  getFeatureInsightMetrics,
  getLocalizedFeatureProperties
} from "../utils/feature-properties";
import { FeaturePropertyList } from "./feature-property-list";

type FeatureInsightPanelProps = {
  feature: DetailFeature | null;
  onClose: () => void;
};

export function FeatureInsightPanel({ feature, onClose }: FeatureInsightPanelProps) {
  const metrics = useMemo(() => {
    if (!feature) {
      return [];
    }

    return getFeatureInsightMetrics(feature.layer, feature.properties);
  }, [feature]);

  const propertyEntries = useMemo(() => {
    if (!feature) {
      return [];
    }

    return getLocalizedFeatureProperties(feature.properties);
  }, [feature]);

  return (
    <aside className="acrylic-panel pointer-events-auto flex h-full min-h-0 flex-col rounded border">
      <div className="border-b border-slate-200/80 p-4">
        <div className="flex items-start justify-between gap-3">
          <div>
            <p className="text-xs font-medium tracking-[0.14em] text-slate-500">要素详情</p>
            <h2 className="mt-1 text-lg font-semibold text-slate-950">
              {feature ? feature.title : "选择一个管网对象"}
            </h2>
          </div>
          <button
            type="button"
            aria-label="关闭详情"
            title="关闭详情"
            onClick={onClose}
            className="surface-control grid h-9 w-9 place-items-center rounded border text-slate-500 hover:text-slate-900"
          >
            <X size={16} aria-hidden="true" />
          </button>
        </div>
        <p className="mt-2 text-sm text-slate-600">
          {feature ? feature.subtitle : "点击地图上的管线或节点后，这里会展示属性和 Agent 解释。"}
        </p>
      </div>

      <div className="min-h-0 flex-1 overflow-auto p-4">
        {feature ? (
          <>
            <div className="grid grid-cols-2 gap-2">
              {metrics.map(({ label, value }) => (
                <div key={label} className="surface-reading rounded border p-3">
                  <p className="text-xs text-slate-500">{label}</p>
                  <p className="mt-1 truncate text-sm font-semibold text-slate-900 tabular-nums">{value}</p>
                </div>
              ))}
            </div>

            <section className="material-tone-warning mt-4 rounded border border-orange-100 p-3">
              <div className="flex items-center gap-2 text-sm font-semibold text-orange-900">
                <TriangleAlert size={16} aria-hidden="true" />
                Agent 解释
              </div>
              <p className="mt-2 text-sm leading-6 text-slate-700">
                该对象来自 GeoServer MVT。当前仅执行前端预览，不会写入样式、模型参数或调度工单。
              </p>
            </section>

            <section className="mt-4">
              <h3 className="text-sm font-semibold text-slate-900">属性</h3>
              <div className="mt-2">
                <FeaturePropertyList entries={propertyEntries} />
              </div>
            </section>
          </>
        ) : (
          <div className="flex h-full flex-col items-center justify-center text-center">
            <div className="surface-reading grid h-12 w-12 place-items-center rounded border text-slate-500">
              <Target size={22} aria-hidden="true" />
            </div>
            <p className="mt-3 text-sm font-medium text-slate-800">等待地图选择</p>
            <p className="mt-1 max-w-[260px] text-sm leading-6 text-slate-500">
              选择要素后，可查看基础属性、模拟入口与 Agent 会话联动结果。
            </p>
          </div>
        )}
      </div>
    </aside>
  );
}