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#include <windows.h>

#include "chrome/browser/automation/url_request_mock_http_job.h"

#include "base/file_util.h"
#include "base/message_loop.h"
#include "base/string_util.h"
#include "net/base/net_util.h"
#include "net/url_request/url_request_filter.h"

static const char kMockHostname[] = "mock.http";
static const wchar_t kMockHeaderFileSuffix[] = L".mock-http-headers";

std::wstring URLRequestMockHTTPJob::base_path_ = L"";

/* static */
URLRequestJob* URLRequestMockHTTPJob::Factory(URLRequest* request,
                                              const std::string& scheme) {
  std::wstring file_url(L"file:///");
  file_url += base_path_;
  const std::string& url = request->url().spec();
  // Fix up the url to be the file url we're loading from disk.
  std::string host_prefix("http://");
  host_prefix.append(kMockHostname);
  size_t host_prefix_len = host_prefix.length();
  if (url.compare(0, host_prefix_len, host_prefix.data(),
                  host_prefix_len) == 0) {
    file_url += UTF8ToWide(url.substr(host_prefix_len));
  }

  // Convert the file:/// URL to a path on disk.
  std::wstring file_path;
  net_util::FileURLToFilePath(GURL(file_url), &file_path);
  URLRequestMockHTTPJob* job = new URLRequestMockHTTPJob(request);
  job->file_path_ = file_path;
  return job;
}

/* static */
void URLRequestMockHTTPJob::AddUITestUrls(const std::wstring& base_path) {
  base_path_ = base_path;

  // Add kMockHostname to URLRequestFilter.
  URLRequestFilter* filter = URLRequestFilter::GetInstance();
  filter->AddHostnameHandler("http", kMockHostname,
                             URLRequestMockHTTPJob::Factory);
}

/* static */
GURL URLRequestMockHTTPJob::GetMockUrl(const std::wstring& path) {
  std::wstring url = L"http://";
  url.append(UTF8ToWide(kMockHostname));
  url.append(L"/");
  url.append(path);
  return GURL(url);
}

URLRequestMockHTTPJob::URLRequestMockHTTPJob(URLRequest* request)
    : URLRequestFileJob(request) { }

void URLRequestMockHTTPJob::GetResponseInfo(net::HttpResponseInfo* info) {
  std::wstring header_file = file_path_ + kMockHeaderFileSuffix;
  std::string raw_headers;
  if (!file_util::ReadFileToString(header_file, &raw_headers))
    return;

  // ParseRawHeaders expects \0 to end each header line.
  ReplaceSubstringsAfterOffset(&raw_headers, 0, "\n", std::string("\0", 1));
  info->headers = new net::HttpResponseHeaders(raw_headers);
}

bool URLRequestMockHTTPJob::GetMimeType(std::string* mime_type) {
  net::HttpResponseInfo info;
  GetResponseInfo(&info);
  return info.headers && info.headers->GetMimeType(mime_type);
}

bool URLRequestMockHTTPJob::GetCharset(std::string* charset) {
  net::HttpResponseInfo info;
  GetResponseInfo(&info);
  return info.headers && info.headers->GetCharset(charset);
}