import path from 'path';
import fs from 'fs';
import { PROJECT_ROOT, loadJSON } from './shared';
import type { ToolDefinition } from './types';

export const getManifest: ToolDefinition = {
  name: 'get_manifest',
  description: '读取指定 manifest.json 的完整内容，返回 JSON 字符串。',
  input_schema: {
    type: 'object',
    properties: {
      manifestPath: { type: 'string', description: 'manifest.json 的绝对路径或相对路径' },
    },
    required: ['manifestPath'],
  },
  execute: async (params) => {
    const { manifestPath } = params as { manifestPath: string };
    const resolved = path.isAbsolute(manifestPath)
      ? manifestPath
      : path.resolve(PROJECT_ROOT, manifestPath);
    if (!fs.existsSync(resolved)) return `manifest 不存在: ${resolved}`;
    const manifest = loadJSON(resolved);
    return JSON.stringify(manifest, null, 2);
  },
};