export type ViewKey =
  | "home"
  | "studio"
  | "kb"
  | "report"
  | "runs"
  | "memory"
  | "market"
  | "admin";

interface Item {
  key: ViewKey;
  label: string;
  icon: string;
  group?: string;
  ready?: boolean;
}

const ITEMS: Item[] = [
  { key: "home", label: "工作台", icon: "▤", ready: true },
  { key: "studio", label: "编排", icon: "◆", group: "BUILD", ready: true },
  { key: "kb", label: "知识库", icon: "▣", group: "BUILD", ready: true },
  { key: "report", label: "报告", icon: "▦", group: "BUILD", ready: true },
  { key: "runs", label: "运行", icon: "▸", group: "RUN" },
  { key: "memory", label: "记忆", icon: "◇", group: "MANAGE", ready: true },
  { key: "market", label: "市场", icon: "⌧", group: "MANAGE" },
  { key: "admin", label: "管理", icon: "⚙", group: "MANAGE" },
];

// 左导航：深色，激活态紫色高亮 + 左侧光条。
export function LeftNav({ active, onSelect }: { active: ViewKey; onSelect: (v: ViewKey) => void }) {
  let lastGroup: string | undefined;
  return (
    <nav className="flex w-[72px] shrink-0 flex-col gap-0.5 border-r border-line bg-ink-900 py-2">
      {ITEMS.map((it) => {
        const header = it.group && it.group !== lastGroup ? it.group : null;
        lastGroup = it.group ?? lastGroup;
        const isActive = active === it.key;
        return (
          <div key={it.key}>
            {header && <div className="mt-3 px-2 text-[9px] font-semibold tracking-widest text-slate-600">{header}</div>}
            <button
              onClick={() => onSelect(it.key)}
              className={`relative flex w-full flex-col items-center gap-1 py-2.5 text-[11px] transition ${
                isActive ? "text-violet-300" : "text-slate-500 hover:bg-ink-800 hover:text-slate-300"
              }`}
              title={it.ready === false ? `${it.label}（规划中）` : it.label}
            >
              {isActive && <span className="absolute left-0 top-1/2 h-6 w-0.5 -translate-y-1/2 rounded-r bg-gradient-to-b from-violet-400 to-cyan-400" />}
              <span className={`text-lg leading-none ${isActive ? "drop-shadow-[0_0_6px_rgba(139,92,246,0.6)]" : ""}`}>{it.icon}</span>
              {it.label}
              {it.ready === false && <span className="text-[8px] text-slate-600">规划</span>}
            </button>
          </div>
        );
      })}
    </nav>
  );
}