/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#import <wtf/ObjectIdentifier.h>
#import <wtf/RetainPtr.h>
#import <wtf/URL.h>
#import <wtf/Vector.h>

#if PLATFORM(MAC)
#define PlatformColor                   NSColor
#define PlatformColorClass              NSColor.class
#define PlatformFont                    NSFont
#define PlatformFontClass               NSFont.class
#define PlatformImageClass              NSImage
#define PlatformNSColorClass            NSColor
#define PlatformNSParagraphStyle        NSParagraphStyle.class
#define PlatformNSPresentationIntent    NSPresentationIntent.class
#define PlatformNSShadow                NSShadow.class
#define PlatformNSTextAttachment        NSTextAttachment.class
#define PlatformNSTextList              NSTextList
#define PlatformNSTextTab               NSTextTab
#define PlatformNSTextTable             NSTextTable
#define PlatformNSTextTableBlock        NSTextTableBlock.class
#else
#define PlatformColor                   UIColor
#define PlatformColorClass              PAL::getUIColorClass()
#define PlatformFont                    UIFont
#define PlatformFontClass               PAL::getUIFontClass()
#define PlatformImageClass              PAL::getUIImageClass()
#define PlatformNSColorClass            getNSColorClass()
#define PlatformNSParagraphStyle        PAL::getNSParagraphStyleClass()
#define PlatformNSPresentationIntent    PAL::getNSPresentationIntentClass()
#define PlatformNSShadow                PAL::getNSShadowClass()
#define PlatformNSTextAttachment        getNSTextAttachmentClass()
#define PlatformNSTextList              getNSTextListClass()
#define PlatformNSTextTab               getNSTextTabClass()
#define PlatformNSTextTable             getNSTextTableClass()
#define PlatformNSTextTableBlock        getNSTextTableBlockClass()
#endif

OBJC_CLASS NSAttributedString;
OBJC_CLASS NSDate;
OBJC_CLASS NSDictionary;
OBJC_CLASS NSParagraphStyle;
OBJC_CLASS NSPresentationIntent;
OBJC_CLASS NSShadow;
OBJC_CLASS NSTextAttachment;
OBJC_CLASS PlatformColor;

namespace WebCore {

class Font;

struct AttributedStringTextTableIDType;
using AttributedStringTextTableID = ObjectIdentifier<AttributedStringTextTableIDType>;

struct AttributedStringTextTableBlockIDType;
using AttributedStringTextTableBlockID = ObjectIdentifier<AttributedStringTextTableBlockIDType>;

struct AttributedStringTextListIDType;
using AttributedStringTextListID = ObjectIdentifier<AttributedStringTextListIDType>;

struct WEBCORE_EXPORT AttributedString {
    struct Range {
        size_t location { 0 };
        size_t length { 0 };
    };

    using TextTableID = AttributedStringTextTableID;
    using TextTableBlockID = AttributedStringTextTableBlockID;
    using TextListID = AttributedStringTextListID;
    using TableBlockAndTableIDPair = std::pair<TextTableBlockID, TextTableID>;

    struct ParagraphStyleWithTableAndListIDs {
        RetainPtr<NSParagraphStyle> style;
        Vector<std::optional<TableBlockAndTableIDPair>> tableBlockAndTableIDs; // Same length as `-textBlocks`.
        Vector<TextListID> listIDs; // Same length as `-textLists`.
    };

    struct AttributeValue {
        std::variant<
            double,
            String,
            URL,
            Ref<Font>,
            Vector<String>,
            Vector<double>,
            ParagraphStyleWithTableAndListIDs,
            RetainPtr<NSPresentationIntent>,
            RetainPtr<NSTextAttachment>,
            RetainPtr<NSShadow>,
            RetainPtr<NSDate>,
            RetainPtr<PlatformColor>,
            RetainPtr<CGColorRef>
        > value;
    };

    String string;
    Vector<std::pair<Range, HashMap<String, AttributeValue>>> attributes;
    std::optional<HashMap<String, AttributeValue>> documentAttributes;

    AttributedString();
    AttributedString(String&&, Vector<std::pair<Range, HashMap<String, AttributeValue>>>&&, std::optional<HashMap<String, AttributeValue>>&&);
    AttributedString(AttributedString&&);
    AttributedString(const AttributedString&);
    AttributedString& operator=(AttributedString&&);
    AttributedString& operator=(const AttributedString&);
    ~AttributedString();

    static AttributedString fromNSAttributedStringAndDocumentAttributes(RetainPtr<NSAttributedString>&&, RetainPtr<NSDictionary>&& documentAttributes);
    static AttributedString fromNSAttributedString(RetainPtr<NSAttributedString>&&);
    static bool rangesAreSafe(const String&, const Vector<std::pair<Range, HashMap<String, AttributeValue>>>&);
    RetainPtr<NSDictionary> documentAttributesAsNSDictionary() const;
    RetainPtr<NSAttributedString> nsAttributedString() const;
};

} // namespace WebCore
