import { readFileSync } from 'node:fs';

import { describe, expect, it } from 'vitest';

const productionNginx = readFileSync('deploy/nginx/genarrative.conf', 'utf8');
const clientDownloadsSnippet = readFileSync(
  'deploy/nginx/snippets/tsingnova-client-downloads.conf',
  'utf8',
);

function extractServerBlocks(source: string): string[] {
  const blocks: string[] = [];
  const serverStart = /\bserver\s*\{/gu;
  let match: RegExpExecArray | null;

  while ((match = serverStart.exec(source)) !== null) {
    const openBrace = source.indexOf('{', match.index);
    let depth = 0;
    let quote: '"' | "'" | null = null;
    let escaped = false;
    let inComment = false;

    for (let index = openBrace; index < source.length; index += 1) {
      const character = source[index];

      if (inComment) {
        if (character === '\n') {
          inComment = false;
        }
        continue;
      }
      if (quote !== null) {
        if (escaped) {
          escaped = false;
        } else if (character === '\\') {
          escaped = true;
        } else if (character === quote) {
          quote = null;
        }
        continue;
      }
      if (character === '#') {
        inComment = true;
      } else if (character === '"' || character === "'") {
        quote = character;
      } else if (character === '{') {
        depth += 1;
      } else if (character === '}') {
        depth -= 1;
        if (depth === 0) {
          blocks.push(source.slice(match.index, index + 1));
          serverStart.lastIndex = index + 1;
          break;
        }
      }
    }
  }

  return blocks;
}

describe('清智创游官网引擎下载路由', () => {
  it('主站模板不重复声明官网独立域名，下载路由由现役官网 vhost 单独维护', () => {
    expect(productionNginx).not.toContain('tsingnovagames.com');
    expect(clientDownloadsSnippet).toContain(
      'location = /api/client-downloads {',
    );
  });

  it('下载 snippet 只声明精确接口并复用主站保护与 upstream', () => {
    expect(clientDownloadsSnippet).toContain(
      'location = /api/client-downloads {',
    );
    expect(clientDownloadsSnippet).not.toMatch(
      /location\s+(?:~|\^~)?\s*\/api(?:\/|\s|\{|\$)/u,
    );
    for (const directive of [
      'limit_conn genarrative_api_conn 64;',
      'limit_req zone=genarrative_api_rps burst=64 nodelay;',
      'limit_conn_status 429;',
      'limit_req_status 429;',
      'if ($genarrative_maintenance) {',
      'proxy_pass http://genarrative_api;',
      'proxy_set_header Cookie "";',
      'proxy_set_header Authorization "";',
      'proxy_connect_timeout 3s;',
      'proxy_read_timeout 15s;',
      'proxy_send_timeout 15s;',
      'proxy_buffering off;',
      'proxy_cache off;',
      'add_header X-Accel-Buffering no always;',
    ]) {
      expect(clientDownloadsSnippet).toContain(directive);
    }
    expect(clientDownloadsSnippet).not.toMatch(
      /^\s*add_header\s+Cache-Control\b/mu,
    );
  });
});