using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;


[Serializable]
public class Map : Dictionary<string, object>
{
    // 获取字符串值
    public string GetStr(string key)
    {
        return (TryGetValue(key, out var value) && value is string strValue) ? strValue : null;
    }

    // 获取整数值
    public int? GetInt(string key)
    {
        return (TryGetValue(key, out var value) && value is long longValue) ? (int)longValue : null;
    }

    // 获取整数值
    public long? GetLong(string key)
    {
        return (TryGetValue(key, out var value) && value is long longValue) ? longValue : null;
    }
    public ulong? GetULong(string key)
    {
        return (TryGetValue(key, out var value) && value is long longValue) ? (ulong)longValue : null;
    }

    // 获取布尔值
    public bool? GetBool(string key)
    {
        return (TryGetValue(key, out var value) && value is bool boolValue) ? boolValue : null;
    }

    // 获取子字典
    public Map GetMap(string key)
    {
        return (TryGetValue(key, out var value) && value is Dictionary<string, object> dictValue)
            ? new Map(dictValue)
            : null;
    }

    public List<object> getList(string key)
    {
        return (TryGetValue(key, out var value) && value is List<object> list)
            ? list
            : new List<object>();
    }


    // 构造函数，用于从普通字典初始化
    public Map()
    {
    }

    public Map(Dictionary<string, object> dictionary)
    {
        foreach (var item in dictionary)
        {
            Add(item.Key, item.Value);
        }
    }

    public Map(string json)
    {
        Dictionary<string, object> dictionary = Deserialize(json) as Dictionary<string, object>;
        foreach (var item in dictionary)
        {
            Add(item.Key, item.Value);
        }
    }
    public string ToJson()
    {
        return Serializer.Serialize(this);
    }

    public static object Deserialize(string json)
    {  
        if (json == null)
        {
            return null;
        }
        return Parser.Parse(json);
    }

    sealed class Parser : IDisposable
    {
        const string WORD_BREAK = "{}[],:\"";

        public static bool IsWordBreak(char c)
        {
            return Char.IsWhiteSpace(c) || WORD_BREAK.IndexOf(c) != -1;
        }

        const string HEX_DIGIT = "0123456789ABCDEFabcdef";

        public static bool IsHexDigit(char c)
        {
            return HEX_DIGIT.IndexOf(c) != -1;
        }

        enum TOKEN
        {
            NONE,
            CURLY_OPEN,
            CURLY_CLOSE,
            SQUARED_OPEN,
            SQUARED_CLOSE,
            COLON,
            COMMA,
            STRING,
            NUMBER,
            TRUE,
            FALSE,
            NULL
        };

        StringReader json;

        Parser(string jsonString)
        {
            json = new StringReader(jsonString);
        }

        public static object Parse(string jsonString)
        {
            using (var instance = new Parser(jsonString))
            {
                return instance.ParseValue();
            }
        }

        public void Dispose()
        {
            json.Dispose();
            json = null;
        }

        Dictionary<string, object> ParseObject()
        {
            Dictionary<string, object> table = new Dictionary<string, object>();

            json.Read();

            while (true)
            {
                switch (NextToken)
                {
                    case TOKEN.NONE:
                        return null;
                    case TOKEN.COMMA:
                        continue;
                    case TOKEN.CURLY_CLOSE:
                        return table;
                    case TOKEN.STRING:
                        string name = ParseString();
                        if (name == null)
                        {
                            return null;
                        }

                        if (NextToken != TOKEN.COLON)
                        {
                            return null;
                        }

                        json.Read();

                        TOKEN valueToken = NextToken;
                        object value = ParseByToken(valueToken);
                        if (value == null && valueToken != TOKEN.NULL)
                            return null;
                        table[name] = value;
                        break;
                    default:
                        return null;
                }
            }
        }

        List<object> ParseArray()
        {
            List<object> array = new List<object>();

            json.Read();

            var parsing = true;
            while (parsing)
            {
                TOKEN nextToken = NextToken;

                switch (nextToken)
                {
                    case TOKEN.NONE:
                        return null;
                    case TOKEN.COMMA:
                        continue;
                    case TOKEN.SQUARED_CLOSE:
                        parsing = false;
                        break;
                    default:
                        object value = ParseByToken(nextToken);
                        if (value == null && nextToken != TOKEN.NULL)
                            return null;
                        array.Add(value);
                        break;
                }
            }

            return array;
        }

        object ParseValue()
        {
            TOKEN nextToken = NextToken;
            return ParseByToken(nextToken);
        }

        object ParseByToken(TOKEN token)
        {
            switch (token)
            {
                case TOKEN.STRING:
                    return ParseString();
                case TOKEN.NUMBER:
                    return ParseNumber();
                case TOKEN.CURLY_OPEN:
                    return ParseObject();
                case TOKEN.SQUARED_OPEN:
                    return ParseArray();
                case TOKEN.TRUE:
                    return true;
                case TOKEN.FALSE:
                    return false;
                case TOKEN.NULL:
                    return null;
                default:
                    return null;
            }
        }

        string ParseString()
        {
            StringBuilder s = new StringBuilder();
            char c;

            json.Read();

            bool parsing = true;
            while (parsing)
            {
                if (json.Peek() == -1)
                {
                    parsing = false;
                    break;
                }

                c = NextChar;
                switch (c)
                {
                    case '"':
                        parsing = false;
                        break;
                    case '\\':
                        if (json.Peek() == -1)
                        {
                            parsing = false;
                            break;
                        }

                        c = NextChar;
                        switch (c)
                        {
                            case '"':
                            case '\\':
                            case '/':
                                s.Append(c);
                                break;
                            case 'b':
                                s.Append('\b');
                                break;
                            case 'f':
                                s.Append('\f');
                                break;
                            case 'n':
                                s.Append('\n');
                                break;
                            case 'r':
                                s.Append('\r');
                                break;
                            case 't':
                                s.Append('\t');
                                break;
                            case 'u':
                                var hex = new char[4];

                                for (int i = 0; i < 4; i++)
                                {
                                    hex[i] = NextChar;
                                    if (!IsHexDigit(hex[i]))
                                        return null;
                                }

                                s.Append((char)Convert.ToInt32(new string(hex), 16));
                                break;
                        }

                        break;
                    default:
                        s.Append(c);
                        break;
                }
            }

            return s.ToString();
        }

        object ParseNumber()
        {
            string number = NextWord;

            if (number.IndexOf('.') == -1 && number.IndexOf('E') == -1 && number.IndexOf('e') == -1)
            {
                long parsedInt;
                Int64.TryParse(number, System.Globalization.NumberStyles.Any,
                    System.Globalization.CultureInfo.InvariantCulture, out parsedInt);
                return parsedInt;
            }

            double parsedDouble;
            Double.TryParse(number, System.Globalization.NumberStyles.Any,
                System.Globalization.CultureInfo.InvariantCulture, out parsedDouble);
            return parsedDouble;
        }

        void EatWhitespace()
        {
            while (Char.IsWhiteSpace(PeekChar))
            {
                json.Read();

                if (json.Peek() == -1)
                {
                    break;
                }
            }
        }

        char PeekChar
        {
            get { return Convert.ToChar(json.Peek()); }
        }

        char NextChar
        {
            get { return Convert.ToChar(json.Read()); }
        }

        string NextWord
        {
            get
            {
                StringBuilder word = new StringBuilder();

                while (!IsWordBreak(PeekChar))
                {
                    word.Append(NextChar);

                    if (json.Peek() == -1)
                    {
                        break;
                    }
                }

                return word.ToString();
            }
        }

        TOKEN NextToken
        {
            get
            {
                EatWhitespace();

                if (json.Peek() == -1)
                {
                    return TOKEN.NONE;
                }

                switch (PeekChar)
                {
                    case '{':
                        return TOKEN.CURLY_OPEN;
                    case '}':
                        json.Read();
                        return TOKEN.CURLY_CLOSE;
                    case '[':
                        return TOKEN.SQUARED_OPEN;
                    case ']':
                        json.Read();
                        return TOKEN.SQUARED_CLOSE;
                    case ',':
                        json.Read();
                        return TOKEN.COMMA;
                    case '"':
                        return TOKEN.STRING;
                    case ':':
                        return TOKEN.COLON;
                    case '0':
                    case '1':
                    case '2':
                    case '3':
                    case '4':
                    case '5':
                    case '6':
                    case '7':
                    case '8':
                    case '9':
                    case '-':
                        return TOKEN.NUMBER;
                }

                switch (NextWord)
                {
                    case "false":
                        return TOKEN.FALSE;
                    case "true":
                        return TOKEN.TRUE;
                    case "null":
                        return TOKEN.NULL;
                }

                return TOKEN.NONE;
            }
        }
    }

    sealed class Serializer
    {
        StringBuilder builder;

        Serializer()
        {
            builder = new StringBuilder();
        }

        public static string Serialize(object obj)
        {
            var instance = new Serializer();

            instance.SerializeValue(obj);

            return instance.builder.ToString();
        }

        void SerializeValue(object value)
        {
            IList asList;
            IDictionary asDict;
            string asStr;

            if (value == null)
            {
                builder.Append("null");
            }
            else if ((asStr = value as string) != null)
            {
                SerializeString(asStr);
            }
            else if (value is bool)
            {
                builder.Append((bool)value ? "true" : "false");
            }
            else if ((asList = value as IList) != null)
            {
                SerializeArray(asList);
            }
            else if ((asDict = value as IDictionary) != null)
            {
                SerializeObject(asDict);
            }
            else if (value is char)
            {
                SerializeString(new string((char)value, 1));
            }
            else
            {
                SerializeOther(value);
            }
        }

        void SerializeObject(IDictionary obj)
        {
            bool first = true;

            builder.Append('{');

            foreach (object e in obj.Keys)
            {
                if (!first)
                {
                    builder.Append(',');
                }

                SerializeString(e.ToString());
                builder.Append(':');

                SerializeValue(obj[e]);

                first = false;
            }

            builder.Append('}');
        }

        void SerializeArray(IList anArray)
        {
            builder.Append('[');

            bool first = true;

            for (int i = 0; i < anArray.Count; i++)
            {
                object obj = anArray[i];
                if (!first)
                {
                    builder.Append(',');
                }

                SerializeValue(obj);

                first = false;
            }

            builder.Append(']');
        }

        void SerializeString(string str)
        {
            builder.Append('\"');

            char[] charArray = str.ToCharArray();
            for (int i = 0; i < charArray.Length; i++)
            {
                char c = charArray[i];
                switch (c)
                {
                    case '"':
                        builder.Append("\\\"");
                        break;
                    case '\\':
                        builder.Append("\\\\");
                        break;
                    case '\b':
                        builder.Append("\\b");
                        break;
                    case '\f':
                        builder.Append("\\f");
                        break;
                    case '\n':
                        builder.Append("\\n");
                        break;
                    case '\r':
                        builder.Append("\\r");
                        break;
                    case '\t':
                        builder.Append("\\t");
                        break;
                    default:
                        int codepoint = Convert.ToInt32(c);
                        if ((codepoint >= 32) && (codepoint <= 126))
                        {
                            builder.Append(c);
                        }
                        else
                        {
                            builder.Append("\\u");
                            builder.Append(codepoint.ToString("x4"));
                        }

                        break;
                }
            }

            builder.Append('\"');
        }

        void SerializeOther(object value)
        {
            if (value is float)
            {
                builder.Append(((float)value).ToString("R", System.Globalization.CultureInfo.InvariantCulture));
            }
            else if (value is int
                     || value is uint
                     || value is long
                     || value is sbyte
                     || value is byte
                     || value is short
                     || value is ushort
                     || value is ulong)
            {
                builder.Append(value);
            }
            else if (value is double
                     || value is decimal)
            {
                builder.Append(Convert.ToDouble(value)
                    .ToString("R", System.Globalization.CultureInfo.InvariantCulture));
            }
            else
            {
                SerializeString(value.ToString());
            }
        }
    }
}