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// Upload util for usage stats
// example:
//
// UploadUtil uploader;
// vector<pair<string, string> > params;
// params.push_back(make_pair("hl", "ja"));
// params.push_back(make_pair("v", "0.0.0.0"));
// uploader.SetHeader("Daily", 100, params);
// uploader.AddBooleanValue("Boolean", false);
// bool result = uploader.AttemptUpload();

#ifndef MOZC_USAGE_STATS_UPLOAD_UTIL_H_
#define MOZC_USAGE_STATS_UPLOAD_UTIL_H_

#include <vector>
#include <string>
#include <utility>
#include "base/base.h"

namespace mozc {
namespace usage_stats {
class UploadUtil {
 public:
  UploadUtil();
  virtual ~UploadUtil();

  // Sets usage stats header and optional url params.
  // usage stats data format is:
  // <type>&<elapsed_sec>&<name1>=<val1> ...
  // type is transmission type (Daily, Weekly, etc.)
  // elapsed_sec is the time elapsed since the last transmission.
  void SetHeader(const string &type,
                 int elapsed_sec,
                 const vector<pair<string, string> > &optional_url_params);

  // Adds count data.
  // &<name>:c=<count>
  void AddCountValue(const string &name, uint32 count);

  // Adds timing data.
  // &<name>:t=<num_timings>;<avg_time>;<min_time>;<max_time>
  void AddTimingValue(const string &name, uint32 num_timings, uint32 avg_time,
                      uint32 min_time, uint32 max_time);

  // Adds integer data.
  // &<name>:i=<value>
  void AddIntegerValue(const string &name, int int_value);

  // Adds boolean data.
  // &<name>:b=<value>
  void AddBooleanValue(const string &name, bool boolean_value);

  // Remove all data
  void RemoveAllValues();

  // Returns false when upload failed.
  bool Upload();

 private:
  string stat_header_;
  string stat_values_;
  vector<pair<string, string> > optional_url_params_;
  DISALLOW_COPY_AND_ASSIGN(UploadUtil);
};
}  // namespace mozc::usage_stats
}  // namespace mozc
#endif  // MOZC_USAGE_STATS_UPLOAD_UTIL_H_