/** Insight Rail 组件 — 右侧 AI 洞察面板，可展开/折叠。 */

"use client";

import { useState } from "react";
import {
  ChevronRight, ChevronLeft, Bot, Sparkles, FileText, AlertTriangle,
  Users, ScrollText, Network, UserCircle, TrendingUp, Cpu, ShieldCheck,
  type LucideIcon,
} from "lucide-react";

/** Agent 类型定义。 */
interface AgentDef {
  key: string;
  name: string;
  icon: LucideIcon;
  trigger: string;
  output: string;
  action: string;
}

/** 12 个 Agent 配置。 */
const AGENTS: AgentDef[] = [
  { key: "report", name: "报表分析", icon: FileText, trigger: "查看月报/季报", output: "指标提取卡片 + 异常高亮", action: "生成投后摘要草稿" },
  { key: "validator", name: "数据校验", icon: ShieldCheck, trigger: "指标出现矛盾", output: "校验维度矩阵 + 可信度评分", action: "标记可疑数据" },
  { key: "risk", name: "风险预警", icon: AlertTriangle, trigger: "健康度下降/弱信号", output: "风险等级 + 证据链", action: "创建决策线程" },
  { key: "board", name: "董事会", icon: Users, trigger: "董事会前后", output: "决议追踪 + 提问清单", action: "加入董事会议题" },
  { key: "agreement", name: "投资协议", icon: ScrollText, trigger: "协议条款即将触发", output: "条款原文 + 触发条件", action: "发送披露提醒" },
  { key: "synergy", name: "协同匹配", icon: Network, trigger: "查看协同中心", output: "匹配度评分 + 资源互补图", action: "生成协同方案草稿" },
  { key: "talent", name: "人才分析", icon: UserCircle, trigger: "核心团队变动", output: "稳定性评分 + 9-Box 矩阵", action: "启动人才搜索" },
  { key: "financing", name: "融资支持", icon: TrendingUp, trigger: "融资阶段/Runway", output: "融资准备度 + 投资人画像", action: "生成融资材料清单" },
  { key: "research", name: "行业研究", icon: Bot, trigger: "竞品/行业动态", output: "行业风险提示 + 对标分析", action: "加入洞察域报告" },
  { key: "ai_commercial", name: "AI+商业化", icon: Sparkles, trigger: "PoC/转化率指标", output: "转化漏斗 + 证据链", action: "生成董事会问题清单" },
  { key: "ai_cost", name: "AI+模型成本", icon: Cpu, trigger: "推理成本/毛利指标", output: "成本趋势 + 单位经济模型", action: "建议模型调用优化" },
  { key: "ai_compliance", name: "AI+数据合规", icon: ShieldCheck, trigger: "合规指标变化", output: "合规风险等级 + 整改建议", action: "生成合规报告草稿" },
];

/** Insight Rail Props。 */
interface InsightRailProps {
  /** 当前激活的 Agent key，默认 "risk"。 */
  defaultAgent?: string;
}

/**
 * Insight Rail 组件 — 桌面端右侧可折叠 AI 洞察面板。
 *
 * 展开宽度 w-80（320px），折叠宽度 w-10（40px）。
 * 包含 12 个 Agent 差异化卡片，支持 Tab 切换。
 */
export function InsightRail({ defaultAgent = "risk" }: InsightRailProps) {
  const [expanded, setExpanded] = useState(false);
  const [activeAgent, setActiveAgent] = useState(defaultAgent);
  const [activeTabs, setActiveTabs] = useState<string[]>([defaultAgent]);

  const agent = AGENTS.find((a) => a.key === activeAgent) ?? AGENTS[0];

  /** 切换 Agent（最多 3 个 Tab）。 */
  function switchAgent(key: string) {
    setActiveAgent(key);
    setActiveTabs((prev) => {
      if (prev.includes(key)) return prev;
      if (prev.length >= 3) return [...prev.slice(1), key];
      return [...prev, key];
    });
  }

  if (!expanded) {
    return (
      <aside
        className="sticky top-0 hidden h-screen w-10 shrink-0 items-center justify-center border-l bg-white md:flex"

      >
        <button
          type="button"
          onClick={() => setExpanded(true)}
          className="flex flex-col items-center gap-1 text-gray-400 transition-colors hover:text-indigo-600"
          aria-label="展开 Insight Rail"
        >
          <ChevronLeft size={18} aria-hidden="true" />
          <Bot size={16} aria-hidden="true" />
          <span className="text-xs [writing-mode:vertical-rl]">Insight</span>
        </button>
      </aside>
    );
  }

  return (
    <aside
      className="sticky top-0 hidden h-screen w-80 shrink-0 flex-col border-l bg-white md:flex"

    >
      {/* 顶部：折叠按钮 + 当前上下文 */}
      <div className="flex items-center justify-between border-b px-3 py-2">
        <span className="text-sm font-medium">AI 洞察</span>
        <button
          type="button"
          onClick={() => setExpanded(false)}
          className="text-gray-400 transition-colors hover:text-gray-600"
          aria-label="折叠 Insight Rail"
        >
          <ChevronRight size={18} aria-hidden="true" />
        </button>
      </div>

      {/* 当前上下文摘要 */}
      <div className="border-b px-3 py-2 text-xs text-muted-foreground">
        <div>企业 A · 治理</div>
        <div>近 90 天 · 3 个风险</div>
      </div>

      {/* Agent Tab 切换 */}
      <div className="flex gap-1 border-b px-2 py-1.5">
        {activeTabs.map((key) => {
          const a = AGENTS.find((ag) => ag.key === key)!;
          return (
            <button
              key={key}
              type="button"
              onClick={() => setActiveAgent(key)}
              className={`flex items-center gap-1 rounded px-2 py-1 text-xs transition-colors ${
                key === activeAgent
                  ? "bg-indigo-50 text-indigo-600"
                  : "text-gray-500 hover:bg-gray-50"
              }`}
            >
              <a.icon size={12} aria-hidden="true" />
              {a.name}
            </button>
          );
        })}
      </div>

      {/* Agent 列表 */}
      <div className="flex-1 overflow-y-auto px-3 py-2">
        {/* 当前 Agent 输出 */}
        <div className="mb-3 rounded-lg border bg-gray-50 p-3">
          <div className="mb-2 flex items-center gap-2">
            <agent.icon size={16} className="text-indigo-500" aria-hidden="true" />
            <span className="text-sm font-medium">{agent.name}</span>
          </div>
          <div className="space-y-1.5 text-xs text-gray-600">
            <p><span className="text-gray-400">触发：</span>{agent.trigger}</p>
            <p><span className="text-gray-400">输出：</span>{agent.output}</p>
            <p><span className="text-gray-400">建议：</span>{agent.action}</p>
          </div>
        </div>

        {/* AI 输出规范字段 */}
        <div className="mb-3 space-y-1.5 rounded-lg border p-3 text-xs">
          <div className="flex justify-between">
            <span className="text-gray-400">置信度</span>
            <span className="font-medium text-indigo-600">0.85</span>
          </div>
          <div className="flex justify-between">
            <span className="text-gray-400">证据</span>
            <span className="text-gray-600">3 条关联信号</span>
          </div>
          <div className="flex justify-between">
            <span className="text-gray-400">担忧</span>
            <span className="text-gray-600">数据延迟 2 天</span>
          </div>
          <div className="flex justify-between">
            <span className="text-gray-400">兜底</span>
            <span className="text-gray-600">未使用</span>
          </div>
        </div>

        {/* 操作按钮 */}
        <div className="space-y-2">
          <button
            type="button"
            className="w-full rounded-md bg-indigo-50 px-3 py-2 text-sm text-indigo-600 transition-colors hover:bg-indigo-100"
          >
            创建任务草稿
          </button>
          <button
            type="button"
            className="w-full rounded-md border px-3 py-2 text-sm text-gray-600 transition-colors hover:bg-gray-50"
          >
            发起情景模拟
          </button>
        </div>

        {/* 全部 Agent 列表 */}
        <div className="mt-4">
          <div className="mb-2 text-xs font-medium text-gray-400">全部 Agent</div>
          <div className="grid grid-cols-2 gap-1">
            {AGENTS.map((a) => (
              <button
                key={a.key}
                type="button"
                onClick={() => switchAgent(a.key)}
                className={`flex items-center gap-1.5 rounded px-2 py-1.5 text-xs transition-colors ${
                  a.key === activeAgent
                    ? "bg-indigo-50 text-indigo-600"
                    : "text-gray-600 hover:bg-gray-50"
                }`}
              >
                <a.icon size={12} aria-hidden="true" />
                {a.name}
              </button>
            ))}
          </div>
        </div>
      </div>
    </aside>
  );
}