import logManager from '@electron/service/logger';
import type { HostApiResult } from '@src/types/runtime';
import type { HostApiContext } from '../context';
import type { NormalizedHostApiRequest } from '../route-utils';
import { fail, ok } from '../route-utils';

const DEFAULT_TAIL_LINES = 100;

function parseTailLines(rawValue: string | null): number {
  const parsed = Number(rawValue ?? DEFAULT_TAIL_LINES);
  if (!Number.isFinite(parsed)) {
    return DEFAULT_TAIL_LINES;
  }

  return Math.max(1, Math.floor(parsed));
}

export async function handleLogRoutes(
  request: NormalizedHostApiRequest,
  _ctx: HostApiContext,
): Promise<HostApiResult<unknown> | null> {
  const { pathname, method, url } = request;

  if (pathname === '/api/logs' && method === 'GET') {
    try {
      return ok({
        content: await logManager.readRecentLogText(parseTailLines(url.searchParams.get('tailLines'))),
      });
    } catch (error) {
      return fail(500, error instanceof Error ? error.message : String(error));
    }
  }

  return null;
}