import { readdirSync, existsSync } from 'node:fs';
import { join } from 'node:path';
import { createRouter } from '../../create-router';
import { ITEM_TYPES, itemsDir, ensureItemDirs, type ItemType } from '../../data-path';
import { ensureToolLoader } from '../../ensure-tool-loader';

// Re-applies the boot-time item setup so changes under OFFICER_ITEMS_DIR take effect without a
// server restart. Item lists are already read fresh from disk on every request; this ensures the
// type dirs exist and the tool-loader extension is current, and reports the live item counts so the
// UI can refetch.

const CANONICAL: Record<ItemType, string> = {
  skills: 'SKILL.md',
  tools: 'TOOL.md',
  tasks: 'TASK.md',
  processes: 'PROCESS.md',
  extensions: 'index.ts',
};

function countItems(type: ItemType): number {
  const dir = itemsDir(type);
  if (!existsSync(dir)) return 0;
  let count = 0;
  for (const entry of readdirSync(dir, { withFileTypes: true })) {
    if (entry.isDirectory() && existsSync(join(dir, entry.name, CANONICAL[type]))) count++;
  }
  return count;
}

export const rescanRouter = createRouter();

rescanRouter.post('/', async (ctx) => {
  ensureItemDirs();
  ensureToolLoader();

  const counts = Object.fromEntries(ITEM_TYPES.map((type) => [type, countItems(type)])) as Record<ItemType, number>;

  return ctx.json({ ok: true, counts });
});