// Copyright 2015 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 "sky/engine/config.h"
#include "sky/engine/bindings/exception_messages.h"

#include "sky/engine/platform/Decimal.h"
#include "sky/engine/wtf/MathExtras.h"

namespace blink {

String ExceptionMessages::failedToConstruct(const char* type,
                                            const String& detail) {
  return "Failed to construct '" + String(type) +
         (!detail.isEmpty() ? String("': " + detail) : String("'"));
}

String ExceptionMessages::failedToEnumerate(const char* type,
                                            const String& detail) {
  return "Failed to enumerate the properties of '" + String(type) +
         (!detail.isEmpty() ? String("': " + detail) : String("'"));
}

String ExceptionMessages::failedToExecute(const char* method,
                                          const char* type,
                                          const String& detail) {
  return "Failed to execute '" + String(method) + "' on '" + String(type) +
         (!detail.isEmpty() ? String("': " + detail) : String("'"));
}

String ExceptionMessages::failedToGet(const char* property,
                                      const char* type,
                                      const String& detail) {
  return "Failed to read the '" + String(property) + "' property from '" +
         String(type) + "': " + detail;
}

String ExceptionMessages::failedToSet(const char* property,
                                      const char* type,
                                      const String& detail) {
  return "Failed to set the '" + String(property) + "' property on '" +
         String(type) + "': " + detail;
}

String ExceptionMessages::failedToDelete(const char* property,
                                         const char* type,
                                         const String& detail) {
  return "Failed to delete the '" + String(property) + "' property from '" +
         String(type) + "': " + detail;
}

String ExceptionMessages::failedToGetIndexed(const char* type,
                                             const String& detail) {
  return "Failed to read an indexed property from '" + String(type) + "': " +
         detail;
}

String ExceptionMessages::failedToSetIndexed(const char* type,
                                             const String& detail) {
  return "Failed to set an indexed property on '" + String(type) + "': " +
         detail;
}

String ExceptionMessages::failedToDeleteIndexed(const char* type,
                                                const String& detail) {
  return "Failed to delete an indexed property from '" + String(type) + "': " +
         detail;
}

String ExceptionMessages::constructorNotCallableAsFunction(const char* type) {
  return failedToConstruct(type,
                           "Please use the 'new' operator, this DOM object "
                           "constructor cannot be called as a function.");
}

String ExceptionMessages::incorrectPropertyType(const String& property,
                                                const String& detail) {
  return "The '" + property + "' property " + detail;
}

String ExceptionMessages::invalidArity(const char* expected,
                                       unsigned provided) {
  return "Valid arities are: " + String(expected) + ", but " +
         String::number(provided) + " arguments provided.";
}

String ExceptionMessages::argumentNullOrIncorrectType(
    int argumentIndex,
    const String& expectedType) {
  return "The " + ordinalNumber(argumentIndex) +
         " argument provided is either null, or an invalid " + expectedType +
         " object.";
}

String ExceptionMessages::notAnArrayTypeArgumentOrValue(int argumentIndex) {
  String kind;
  if (argumentIndex)  // method argument
    kind = ordinalNumber(argumentIndex) + " argument";
  else  // value, e.g. attribute setter
    kind = "value provided";
  return "The " + kind +
         " is neither an array, nor does it have indexed properties.";
}

String ExceptionMessages::notASequenceTypeProperty(const String& propertyName) {
  return "'" + propertyName +
         "' property is neither an array, nor does it have indexed properties.";
}

String ExceptionMessages::notEnoughArguments(unsigned expected,
                                             unsigned provided) {
  return String::number(expected) + " argument" + (expected > 1 ? "s" : "") +
         " required, but only " + String::number(provided) + " present.";
}

String ExceptionMessages::notAFiniteNumber(double value, const char* name) {
  ASSERT(!std::isfinite(value));
  return String::format("The %s is %s.", name,
                        std::isinf(value) ? "infinite" : "not a number");
}

String ExceptionMessages::notAFiniteNumber(const Decimal& value,
                                           const char* name) {
  ASSERT(!value.isFinite());
  return String::format("The %s is %s.", name,
                        value.isInfinity() ? "infinite" : "not a number");
}

String ExceptionMessages::ordinalNumber(int number) {
  String suffix("th");
  switch (number % 10) {
    case 1:
      if (number % 100 != 11)
        suffix = "st";
      break;
    case 2:
      if (number % 100 != 12)
        suffix = "nd";
      break;
    case 3:
      if (number % 100 != 13)
        suffix = "rd";
      break;
  }
  return String::number(number) + suffix;
}

String ExceptionMessages::readOnly(const char* detail) {
  DEFINE_STATIC_LOCAL(String, readOnly, ("This object is read-only."));
  return detail
             ? String::format("This object is read-only, because %s.", detail)
             : readOnly;
}

template <>
String ExceptionMessages::formatNumber<float>(float number) {
  return formatPotentiallyNonFiniteNumber(number);
}

template <>
String ExceptionMessages::formatNumber<double>(double number) {
  return formatPotentiallyNonFiniteNumber(number);
}

}  // namespace blink