// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "chrome/browser/autofill/phone_number.h"

#include "base/basictypes.h"
#include "base/string_util.h"
#include "chrome/browser/autofill/autofill_type.h"
#include "chrome/browser/autofill/field_types.h"

static const string16 kPhoneNumberSeparators = ASCIIToUTF16(" .()-");

static const AutoFillType::FieldTypeSubGroup kAutoFillPhoneTypes[] = {
  AutoFillType::PHONE_NUMBER,
  AutoFillType::PHONE_CITY_CODE,
  AutoFillType::PHONE_COUNTRY_CODE,
  AutoFillType::PHONE_CITY_AND_NUMBER,
  AutoFillType::PHONE_WHOLE_NUMBER,
};

static const int kAutoFillPhoneLength = arraysize(kAutoFillPhoneTypes);

void PhoneNumber::GetPossibleFieldTypes(const string16& text,
                                        FieldTypeSet* possible_types) const {
  string16 stripped_text(text);
  StripPunctuation(&stripped_text);
  if (!Validate(stripped_text))
    return;

  if (IsNumber(stripped_text))
    possible_types->insert(GetNumberType());

  if (IsCityCode(stripped_text))
    possible_types->insert(GetCityCodeType());

  if (IsCountryCode(stripped_text))
    possible_types->insert(GetCountryCodeType());

  if (IsCityAndNumber(stripped_text))
    possible_types->insert(GetCityAndNumberType());

  if (IsWholeNumber(stripped_text))
    possible_types->insert(GetWholeNumberType());
}

string16 PhoneNumber::GetFieldText(const AutoFillType& type) const {
  AutoFillFieldType field_type = type.field_type();
  if (field_type == GetNumberType())
    return number();

  if (field_type == GetCityCodeType())
    return city_code();

  if (field_type == GetCountryCodeType())
    return country_code();

  if (field_type == GetCityAndNumberType())
    return CityAndNumber();

  if (field_type == GetWholeNumberType())
    return WholeNumber();

  return EmptyString16();
}

void PhoneNumber::FindInfoMatches(const AutoFillType& type,
                                  const string16& info,
                                  std::vector<string16>* matched_text) const {
  if (matched_text == NULL) {
    DLOG(ERROR) << "NULL matched vector passed in";
    return;
  }

  string16 number(info);
  StripPunctuation(&number);
  if (!Validate(number))
    return;

  string16 match;
  if (type.field_type() == UNKNOWN_TYPE) {
    for (int i = 0; i < kAutoFillPhoneLength; ++i) {
      if (FindInfoMatchesHelper(kAutoFillPhoneTypes[i], info, &match))
        matched_text->push_back(match);
    }
  } else {
    if (FindInfoMatchesHelper(type.subgroup(), info, &match))
      matched_text->push_back(match);
  }
}

void PhoneNumber::SetInfo(const AutoFillType& type, const string16& value) {
  string16 number(value);
  StripPunctuation(&number);
  if (!Validate(number))
    return;

  FieldTypeSubGroup subgroup = type.subgroup();
  if (subgroup == AutoFillType::PHONE_NUMBER)
    set_number(number);
  else if (subgroup == AutoFillType::PHONE_CITY_CODE)
    set_city_code(number);
  else if (subgroup == AutoFillType::PHONE_COUNTRY_CODE)
    set_country_code(number);
  else
    NOTREACHED();
  // TODO(jhawkins): Add extension support.
  // else if (subgroup == AutoFillType::PHONE_EXTENSION)
  //   set_extension(number);
}

string16 PhoneNumber::WholeNumber() const {
  string16 whole_number;
  if (!country_code_.empty())
    whole_number.append(country_code_);

  if (!city_code_.empty())
    whole_number.append(city_code_);

  if (!number_.empty())
    whole_number.append(number_);

  return whole_number;
}

void PhoneNumber::set_number(const string16& number) {
  string16 digits(number);
  StripPunctuation(&digits);
  number_ = digits;
}

PhoneNumber::PhoneNumber(const PhoneNumber& phone_number)
    : FormGroup(),
      country_code_(phone_number.country_code_),
      city_code_(phone_number.city_code_),
      number_(phone_number.number_),
      extension_(phone_number.extension_) {
}

bool PhoneNumber::FindInfoMatchesHelper(const FieldTypeSubGroup& subgroup,
                                        const string16& info,
                                        string16* match) const {
  if (match == NULL) {
    DLOG(ERROR) << "NULL match string passed in";
    return false;
  }

  match->clear();
  if (subgroup == AutoFillType::PHONE_NUMBER &&
      StartsWith(number(), info, true)) {
    *match = number();
  } else if (subgroup == AutoFillType::PHONE_CITY_CODE &&
             StartsWith(city_code(), info, true)) {
    *match = city_code();
  } else if (subgroup == AutoFillType::PHONE_COUNTRY_CODE &&
             StartsWith(country_code(), info, true)) {
    *match = country_code();
  } else if (subgroup == AutoFillType::PHONE_CITY_AND_NUMBER &&
             StartsWith(CityAndNumber(), info, true)) {
    *match = CityAndNumber();
  } else if (subgroup == AutoFillType::PHONE_WHOLE_NUMBER &&
             StartsWith(WholeNumber(), info, true)) {
    *match = WholeNumber();
  }

  return !match->empty();
}

bool PhoneNumber::IsNumber(const string16& text) const {
  if (text.length() <= number_.length())
    return false;

  return StartsWith(number_, text, false);
}

bool PhoneNumber::IsCityCode(const string16& text) const {
  if (text.length() <= city_code_.length())
    return false;

  return StartsWith(city_code_, text, false);
}

bool PhoneNumber::IsCountryCode(const string16& text) const {
  if (text.length() <= country_code_.length())
    return false;

  return StartsWith(country_code_, text, false);
}

bool PhoneNumber::IsCityAndNumber(const string16& text) const {
  string16 city_and_number(CityAndNumber());
  if (text.length() > city_and_number.length())
    return false;

  return StartsWith(city_and_number, text, false);
}

bool PhoneNumber::IsWholeNumber(const string16& text) const {
  string16 whole_number(WholeNumber());
  if (text.length() > whole_number.length())
    return false;

  return StartsWith(whole_number, text, false);
}

bool PhoneNumber::Validate(const string16& number) const {
  for (size_t i = 0; i < number.length(); ++i) {
    if (!IsAsciiDigit(number[i]))
      return false;
  }

  return true;
}

void PhoneNumber::StripPunctuation(string16* number) const {
  RemoveChars(*number, kPhoneNumberSeparators.c_str(), number);
}