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#include "unix/ibus/message_translator.h"

#include <map>
#include <string>
#include <vector>

#include "base/logging.h"
#include "base/port.h"
#include "base/util.h"

namespace {

struct TranslationMap {
  const char *message;
  const char *translated;
};

const TranslationMap kUTF8JapaneseMap[] = {
  // "直接入力"
  { "Direct input", "\xE7\x9B\xB4\xE6\x8E\xA5\xE5\x85\xA5\xE5\x8A\x9B" },
  // "ひらがな"
  { "Hiragana", "\xE3\x81\xB2\xE3\x82\x89\xE3\x81\x8C\xE3\x81\xAA" },
  // "カタカナ"
  { "Katakana", "\xE3\x82\xAB\xE3\x82\xBF\xE3\x82\xAB\xE3\x83\x8A" },
  // "半角英数"
  { "Latin", "\xE5\x8D\x8A\xE8\xA7\x92\xE8\x8B\xB1\xE6\x95\xB0" },
  // "全角英数"
  { "Wide Latin", "\xE5\x85\xA8\xE8\xA7\x92\xE8\x8B\xB1\xE6\x95\xB0" },
  // "半角カタカナ"
  { "Half width katakana",
    "\xE5\x8D\x8A\xE8\xA7\x92"
    "\xE3\x82\xAB\xE3\x82\xBF\xE3\x82\xAB\xE3\x83\x8A" },
  // "ツール"
  { "Tools", "\xE3\x83\x84\xE3\x83\xBC\xE3\x83\xAB" },
  // "プロパティ"
  { "Properties",
    "\xE3\x83\x97\xE3\x83\xAD\xE3\x83\x91\xE3\x83\x86\xE3\x82\xA3" },
  // "辞書ツール"
  { "Dictionary Tool",
    "\xE8\xBE\x9E\xE6\x9B\xB8\xE3\x83\x84\xE3\x83\xBC\xE3\x83\xAB" },
  // "単語登録"
  { "Add Word",
    "\xE5\x8D\x98\xE8\xAA\x9E\xE7\x99\xBB\xE9\x8C\xB2" },
  // "手書き文字入力"
  { "Handwriting",
    "\xE6\x89\x8B\xE6\x9B\xB8\xE3\x81\x8D"
    "\xE6\x96\x87\xE5\xAD\x97\xE5\x85\xA5\xE5\x8A\x9B" },
  // "文字パレット"
  { "Character Palette",
    "\xE6\x96\x87\xE5\xAD\x97"
    "\xE3\x83\x91\xE3\x83\xAC\xE3\x83\x83\xE3\x83\x88" },
  // "入力モード"
  { "Input Mode",
    "\xE5\x85\xA5\xE5\x8A\x9B\xE3\x83\xA2\xE3\x83\xBC\xE3\x83\x89" },
  // "Mozc について"
  // TODO(team): This should be "Google 日本語入力について"
  //     for official branding build.
  { "About Mozc",
    "\x4D\x6F\x7A\x63\x20\xE3\x81\xAB\xE3\x81\xA4\xE3\x81\x84\xE3\x81\xA6" },
};

}  // namespace

namespace mozc {
namespace ibus {

MessageTranslatorInterface::~MessageTranslatorInterface() {}

NullMessageTranslator::NullMessageTranslator() {}

string NullMessageTranslator::MaybeTranslate(const string &message) const {
  return message;
}

LocaleBasedMessageTranslator::LocaleBasedMessageTranslator(
    const string &locale_name) {
  // Currently we support ja_JP.UTF-8 and ja_JP.utf8 only.
  vector<string> tokens;
  Util::SplitStringUsing(locale_name, ".", &tokens);
  if (tokens.size() != 2) {
    return;
  }
  const string &language_code = tokens[0];
  if (language_code != "ja_JP") {
    return;
  }

  Util::LowerString(&tokens[1]);
  const string &lowser_char_set_name = tokens[1];
  if (lowser_char_set_name != "utf-8" && lowser_char_set_name != "utf8") {
    return;
  }

  for (size_t i = 0; i < arraysize(kUTF8JapaneseMap); ++i) {
    const TranslationMap &mapping = kUTF8JapaneseMap[i];
    DCHECK(mapping.message);
    DCHECK(mapping.translated);
    utf8_japanese_map_.insert(
        make_pair(mapping.message, mapping.translated));
  }
}

string LocaleBasedMessageTranslator::MaybeTranslate(
    const string &message) const {
  map<string, string>::const_iterator itr =
      utf8_japanese_map_.find(message);
  if (itr == utf8_japanese_map_.end()) {
    return message;
  }

  return itr->second;
}

}  // namespace ibus
}  // namespace mozc