import { mkdirSync, writeFileSync, appendFileSync } from 'fs';
import { join } from 'path';
import { logger } from '../../logger.js';

/** raw保存対象のツール名一覧 */
export const RAW_SAVE_TOOLS = new Set([
  'WebFetch',
  'WebSearch',
  'XSearch',
  'XUserPosts',
  'XPostDetail',
  'BrowseWeb',
  'GetYouTubeTranscript',
  'SearchYouTube',
  'SearchAmazon',
  'TranscribeAudio',
  'SearchMicrosoftLearn',
  'FetchMicrosoftLearn',
  'SearchMicrosoftLearnCache',
  'RefreshMicrosoftLearnCache',
]);

/** DownloadFile はパス記録のみ（二重保存回避） */
export const RAW_LOG_ONLY_TOOLS = new Set(['DownloadFile']);

export function generateRawFilename(toolName: string, ext: string): string {
  const now = new Date();
  const ts = [
    now.getFullYear(),
    String(now.getMonth() + 1).padStart(2, '0'),
    String(now.getDate()).padStart(2, '0'),
    '-',
    String(now.getHours()).padStart(2, '0'),
    String(now.getMinutes()).padStart(2, '0'),
    String(now.getSeconds()).padStart(2, '0'),
    '-',
    String(now.getMilliseconds()).padStart(3, '0'),
  ].join('');
  return `${toolName.toLowerCase()}-${ts}${ext}`;
}

/**
 * ツール実行結果を logs/raw/ に保存する。
 * RAW_SAVE_TOOLS に含まれないツールの場合は何もしない。
 */
export function saveRawData(
  workspacePath: string,
  toolName: string,
  content: string,
): void {
  if (!RAW_SAVE_TOOLS.has(toolName)) return;

  try {
    const rawDir = join(workspacePath, 'logs', 'raw');
    mkdirSync(rawDir, { recursive: true });

    const filename = generateRawFilename(toolName, '.txt');
    const filePath = join(rawDir, filename);
    writeFileSync(filePath, content, 'utf-8');

    const logEntry = {
      timestamp: new Date().toISOString(),
      tool: toolName,
      filename,
      bytes: Buffer.byteLength(content, 'utf-8'),
    };
    appendFileSync(
      join(workspacePath, 'logs', 'rawdata-history.jsonl'),
      JSON.stringify(logEntry) + '\n',
      'utf-8',
    );
  } catch (err) {
    logger.warn(`[raw-save] failed to save raw data for ${toolName}: ${err}`);
  }
}

/**
 * DownloadFile のパス情報を rawdata-history.jsonl に記録する（ファイルコピーはしない）。
 */
export function logRawDownload(
  workspacePath: string,
  toolName: string,
  savedPath: string,
  bytes: number,
): void {
  try {
    const logEntry = {
      timestamp: new Date().toISOString(),
      tool: toolName,
      filename: savedPath,
      bytes,
      type: 'reference',
    };
    appendFileSync(
      join(workspacePath, 'logs', 'rawdata-history.jsonl'),
      JSON.stringify(logEntry) + '\n',
      'utf-8',
    );
  } catch (err) {
    logger.warn(`[raw-save] failed to log download for ${toolName}: ${err}`);
  }
}