// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/libaddressinput/chromium/addressinput_util.h"

#include <stddef.h>

#include <algorithm>

#include "base/check.h"
#include "base/stl_util.h"
#include "third_party/libaddressinput/src/cpp/include/libaddressinput/address_data.h"
#include "third_party/libaddressinput/src/cpp/include/libaddressinput/address_metadata.h"

namespace autofill {
namespace addressinput {

namespace {

using ::i18n::addressinput::AddressData;
using ::i18n::addressinput::AddressField;
using ::i18n::addressinput::AddressProblem;
using ::i18n::addressinput::IsFieldRequired;

using ::i18n::addressinput::MISSING_REQUIRED_FIELD;

// Returns true if the |problem| should be reported for the |field| because
// the |filter| is either null, empty or contains it.
bool FilterContains(const std::multimap<AddressField, AddressProblem>* filter,
                    AddressField field,
                    AddressProblem problem) {
  return filter == nullptr || filter->empty() ||
         std::find(filter->begin(), filter->end(),
                   std::multimap<AddressField, AddressProblem>::value_type(
                       field, problem)) != filter->end();
}

// Returns true if the |problem| should not be reported for the |field| because
// the |filter| is not null or empty and contains it.
bool FilterExcludes(const std::multimap<AddressField, AddressProblem>* filter,
                    AddressField field,
                    AddressProblem problem) {
  return filter != nullptr && !filter->empty() &&
         std::find(filter->begin(), filter->end(),
                   std::multimap<AddressField, AddressProblem>::value_type(
                       field, problem)) != filter->end();
}

static const AddressField kFields[] = {
    ::i18n::addressinput::COUNTRY, ::i18n::addressinput::ADMIN_AREA,
    ::i18n::addressinput::LOCALITY, ::i18n::addressinput::DEPENDENT_LOCALITY,
    ::i18n::addressinput::SORTING_CODE, ::i18n::addressinput::POSTAL_CODE,
    ::i18n::addressinput::STREET_ADDRESS,
    // ORGANIZATION is never required.
    ::i18n::addressinput::RECIPIENT};

}  // namespace

bool HasAllRequiredFields(const AddressData& address_to_check) {
  std::multimap<AddressField, AddressProblem> problems;
  ValidateRequiredFields(address_to_check, nullptr, &problems);
  return problems.empty();
}

void ValidateRequiredFields(
    const AddressData& address_to_check,
    const std::multimap<AddressField, AddressProblem>* inclusion_filter,
    std::multimap<AddressField, AddressProblem>* problems) {
  DCHECK(problems);

  for (auto field : kFields) {
    if (address_to_check.IsFieldEmpty(field) &&
        IsFieldRequired(field, address_to_check.region_code) &&
        FilterContains(inclusion_filter, field, MISSING_REQUIRED_FIELD)) {
      problems->insert(std::make_pair(field, MISSING_REQUIRED_FIELD));
    }
  }
}

void ValidateRequiredFieldsExceptFilteredOut(
    const AddressData& address_to_check,
    const std::multimap<AddressField, AddressProblem>* exclusion_filter,
    std::multimap<AddressField, AddressProblem>* problems) {
  DCHECK(problems);

  for (auto field : kFields) {
    if (address_to_check.IsFieldEmpty(field) &&
        IsFieldRequired(field, address_to_check.region_code) &&
        !FilterExcludes(exclusion_filter, field, MISSING_REQUIRED_FIELD)) {
      problems->insert(std::make_pair(field, MISSING_REQUIRED_FIELD));
    }
  }
}

}  // namespace addressinput
}  // namespace autofill