/**
 * 将 .axhub/make/sidebar-tree.json 左侧菜单同步到各原型 annotation-source.json 的「原型目录」。
 *
 * 用法：
 *   node scripts/sync-project-prototype-directory.mjs
 *   node scripts/sync-project-prototype-directory.mjs --prototype vehicle-management
 */
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const NAV_FOLDER_ID = 'oneos-project-nav';

function parseArgs(argv) {
  const args = { prototype: '', projectRoot: '' };
  for (let i = 0; i < argv.length; i += 1) {
    const arg = argv[i];
    if (arg === '--prototype' && argv[i + 1]) {
      args.prototype = argv[++i].trim();
    } else if (arg === '--project-root' && argv[i + 1]) {
      args.projectRoot = path.resolve(argv[++i].trim());
    }
  }
  return args;
}

function readJson(filePath) {
  return JSON.parse(fs.readFileSync(filePath, 'utf8'));
}

function writeJson(filePath, value) {
  fs.writeFileSync(filePath, `${JSON.stringify(value, null, 2)}\n`, 'utf8');
}

function prototypeIdFromItemKey(itemKey) {
  const normalized = String(itemKey || '').trim().replace(/^\/+/u, '');
  const match = normalized.match(/^prototypes\/(.+)$/u);
  return match ? match[1] : '';
}

function navLinkId(prototypeId) {
  return `nav-link-${prototypeId.replace(/[^a-zA-Z0-9]+/gu, '-').replace(/^-+|-+$/gu, '').toLowerCase()}`;
}

function createLinkNode(sidebarItem, currentPrototypeId) {
  const prototypeId = prototypeIdFromItemKey(sidebarItem.itemKey);
  if (!prototypeId) return null;
  const isCurrent = prototypeId === currentPrototypeId;
  return {
    type: 'link',
    id: navLinkId(prototypeId),
    title: isCurrent ? `${sidebarItem.title}（当前）` : sidebarItem.title,
    href: `/prototypes/${prototypeId}`,
    target: 'self',
  };
}

function sidebarItemsToDirectoryChildren(sidebarItems, currentPrototypeId) {
  const children = [];
  for (const item of sidebarItems || []) {
    if (item?.kind === 'item') {
      const link = createLinkNode(item, currentPrototypeId);
      if (link) children.push(link);
      continue;
    }
    if (item?.kind !== 'folder' || !Array.isArray(item.children)) {
      continue;
    }
    const folderChildren = item.children
      .filter((child) => child?.kind === 'item')
      .map((child) => createLinkNode(child, currentPrototypeId))
      .filter(Boolean);
    if (!folderChildren.length) continue;
    children.push({
      type: 'folder',
      id: item.id ? `nav-${item.id}` : `nav-folder-${children.length + 1}`,
      title: item.title || '分组',
      defaultExpanded: item.defaultExpanded !== false,
      children: folderChildren,
    });
  }
  return children;
}

function loadSidebarPrototypes(projectRoot) {
  const sidebarPath = path.join(projectRoot, '.axhub/make/sidebar-tree.json');
  if (!fs.existsSync(sidebarPath)) {
    throw new Error(`缺少侧边栏配置：${sidebarPath}`);
  }
  const sidebar = readJson(sidebarPath);
  return Array.isArray(sidebar.prototypes) ? sidebar.prototypes : [];
}

function listPrototypeIdsWithAnnotation(projectRoot) {
  const prototypesRoot = path.join(projectRoot, 'src/prototypes');
  if (!fs.existsSync(prototypesRoot)) return [];
  return fs.readdirSync(prototypesRoot, { withFileTypes: true })
    .filter((entry) => entry.isDirectory()
      && fs.existsSync(path.join(prototypesRoot, entry.name, 'annotation-source.json')))
    .map((entry) => entry.name)
    .sort((a, b) => a.localeCompare(b, 'zh-CN'));
}

function fixPublishedLinks(nodes, prototypeId) {
  const walk = (items) => {
    for (const node of items || []) {
      if (node?.type === 'link' && typeof node.href === 'string') {
        const href = node.href.trim();
        const selfMatch = href.match(new RegExp(`^/prototypes/${prototypeId.replace(/[.*+?^${}()|[\]\\]/gu, '\\$&')}(?:[#?].*)?$`, 'u'));
        if (selfMatch) {
          node.href = './index.html';
          node.target = node.target || 'self';
        } else {
          const otherMatch = href.match(/^\/prototypes\/([^/?#]+)(?:[#?].*)?$/u);
          if (otherMatch) {
            node.href = `../${otherMatch[1]}/index.html`;
            node.target = node.target || 'self';
          }
        }
      }
      if (node?.type === 'folder' && Array.isArray(node.children)) {
        walk(node.children);
      }
    }
  };
  walk(nodes);
}

function syncPrototypeDirectory(prototypeId, sidebarItems, projectRoot) {
  const annotationPath = path.join(projectRoot, 'src/prototypes', prototypeId, 'annotation-source.json');
  if (!fs.existsSync(annotationPath)) {
    console.log(`[skip] ${prototypeId}: 无 annotation-source.json`);
    return false;
  }

  const annotation = readJson(annotationPath);
  const navChildren = sidebarItemsToDirectoryChildren(sidebarItems, prototypeId);
  const navFolder = {
    type: 'folder',
    id: NAV_FOLDER_ID,
    title: 'ONE-OS 原型导航',
    defaultExpanded: true,
    children: navChildren,
  };

  const existingNodes = Array.isArray(annotation.directory?.nodes) ? annotation.directory.nodes : [];
  const preservedNodes = existingNodes.filter((node) => node?.id !== NAV_FOLDER_ID);
  fixPublishedLinks(preservedNodes, prototypeId);

  annotation.directory = {
    nodes: [navFolder, ...preservedNodes],
  };
  annotation.data = annotation.data || {};
  annotation.data.updatedAt = Date.now();

  writeJson(annotationPath, annotation);
  console.log(`[sync] ${prototypeId}: 已写入 ${navChildren.length} 个顶级目录项（含分组）`);
  return true;
}

function main() {
  const args = parseArgs(process.argv.slice(2));
  const projectRoot = args.projectRoot || path.resolve(__dirname, '..');
  const sidebarItems = loadSidebarPrototypes(projectRoot);
  const targets = args.prototype
    ? [args.prototype]
    : listPrototypeIdsWithAnnotation(projectRoot);

  if (!sidebarItems.length) {
    console.error('sidebar-tree.json 中未找到 prototypes 菜单。');
    process.exit(1);
  }
  if (!targets.length) {
    console.log('未找到带 annotation-source.json 的原型。');
    process.exit(0);
  }

  let changed = 0;
  for (const prototypeId of targets) {
    if (syncPrototypeDirectory(prototypeId, sidebarItems, projectRoot)) {
      changed += 1;
    }
  }
  console.log(`完成：处理 ${targets.length} 个原型，更新 ${changed} 个 annotation-source.json`);
}

main();