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// Handwriting module connecting to the cloud server.

#include "handwriting/cloud_handwriting.h"

#include "base/logging.h"


namespace mozc {
namespace handwriting {
namespace {

bool MakeHandwritingRequest(const string &request, string *output) {
  bool result = true;
  // The details of sending is internal only just in case.
  return result;
}

bool SendHandwritingFeedback(const string &request) {
  bool result = true;
  // The details of sending is internal only just in case.
  return result;
}

}  // namespace

// static
bool CloudHandwriting::ParseResponse(const string &json,
                                     vector<string> *candidates) {
  // The response format is internal only just in case.

  return true;
}

// static
string CloudHandwriting::CreateRequest(const Strokes &strokes) {
  string result;
  // The request format is internal only just in case.
  return result;
}

// static
string CloudHandwriting::CreateFeedback(
    const Strokes &strokes, const string &result) {
  if (strokes.empty() || result.empty()) {
    return "";
  }

  string feedback_data;
  // The feedback format is internal only just in case.
  return feedback_data;
}

HandwritingStatus CloudHandwriting::Recognize(
    const Strokes &strokes, vector<string> *candidates) const {
  string output;
  if (!MakeHandwritingRequest(CreateRequest(strokes), &output)) {
    return HANDWRITING_NETWORK_ERROR;
  }
  if (!ParseResponse(output, candidates)) {
    return HANDWRITING_ERROR;
  }
  return HANDWRITING_NO_ERROR;
}

HandwritingStatus CloudHandwriting::Commit(const Strokes &strokes,
                                           const string &result) {
  if (strokes.empty()) {
    DLOG(ERROR) << "Empty strokes: nothing should be committed";
    return HANDWRITING_ERROR;
  }

  if (result.empty()) {
    DLOG(ERROR) << "Result is empty";
    return HANDWRITING_ERROR;
  }
  if (!SendHandwritingFeedback(CreateFeedback(strokes, result))) {
    return HANDWRITING_NETWORK_ERROR;
  }
  return HANDWRITING_NO_ERROR;
}

}  // namespace handwriting
}  // namespace mozc