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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsStringBundle_h__
#define nsStringBundle_h__

#include "mozilla/Mutex.h"
#include "nsIStringBundle.h"
#include "nsIMemoryReporter.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "nsCOMArray.h"

class nsIPersistentProperties;


class nsStringBundleBase : public nsIStringBundle
                         , public nsIMemoryReporter
{
public:
    MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)

    nsresult ParseProperties(nsIPersistentProperties**);

    NS_DECL_THREADSAFE_ISUPPORTS
    NS_DECL_NSISTRINGBUNDLE
    NS_DECL_NSIMEMORYREPORTER

    virtual nsresult LoadProperties() = 0;

    const nsCString& BundleURL() const { return mPropertiesURL; }

    // Returns true if this bundle has more than one reference. If it has only
    // a single reference, it is assumed to be held alive by the bundle cache.
    bool IsShared() const { return mRefCnt > 1; }

    static nsStringBundleBase* Cast(nsIStringBundle* aBundle)
    {
      return static_cast<nsStringBundleBase*>(aBundle);
    }

    template <typename T, typename... Args>
    static already_AddRefed<T> Create(Args... args);

protected:
    nsStringBundleBase(const char* aURLSpec);

    virtual ~nsStringBundleBase();

    virtual nsresult GetStringImpl(const nsACString& aName, nsAString& aResult) = 0;

    virtual nsresult GetSimpleEnumerationImpl(nsISimpleEnumerator** elements) = 0;

    void RegisterMemoryReporter();

    nsCString mPropertiesURL;
    mozilla::Mutex mMutex;
    bool mAttemptedLoad;
    bool mLoaded;

    size_t SizeOfIncludingThisIfUnshared(mozilla::MallocSizeOf aMallocSizeOf) const override;

public:
    static nsresult FormatString(const char16_t *formatStr,
                                 const char16_t **aParams, uint32_t aLength,
                                 nsAString& aResult);
};

class nsStringBundle : public nsStringBundleBase
{
public:
    NS_DECL_ISUPPORTS_INHERITED

    nsCOMPtr<nsIPersistentProperties> mProps;

    nsresult LoadProperties() override;

    size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const override;

protected:
    friend class nsStringBundleBase;

    explicit nsStringBundle(const char* aURLSpec);

    virtual ~nsStringBundle();

    nsresult GetStringImpl(const nsACString& aName, nsAString& aResult) override;

    nsresult GetSimpleEnumerationImpl(nsISimpleEnumerator** elements) override;
};

#endif