using System;
using System.Collections.Generic;

namespace ProtoCSStruct
{
    public class ProtoMessageField
    {
        public FieldType FieldType;

        //如果是message或enum，类型的名字
        public string TypeName;

        //字段名字
        public string Name;
        public int Number;
        

        public bool IsRepeated;
        public int RepeatedCount;
        public int StringLength;//字符串长度

        //当类型是enum的时候有效
        public ProtoEnum Enum;

        //当类型是message的时候有效
        public ProtoMessage Message;

        //cs里生成的Repeated类型名字
        public string RepeatedFiledTypeNameInCSharp;
        public int RepeatedFiledBuffSize;

        public bool IsPrimitiveValueTypeField()
        {
            if(FieldType == FieldType.Int32
                || FieldType == FieldType.UInt32
                || FieldType == FieldType.Int64
                || FieldType == FieldType.UInt64)
            {
                return true;
            }

            return false;
        }


        public string GetFiledTypeNameInCSharp()
        {
            if (FieldType == FieldType.Bool)
            {
                return "bool";
            }

            if (FieldType == FieldType.Int32)
            {
                return "int";
            }

            if (FieldType == FieldType.UInt32)
            {
                return "uint";
            }

            if (FieldType == FieldType.Int64)
            {
                return "long";
            }

            if (FieldType == FieldType.UInt64)
            {
                return "ulong";
            }

            if (FieldType == FieldType.Bytes)
            {
                return "byte";
            }

            if (FieldType == FieldType.String)
            {
                return FieldTypeUtils.GetFixedStringClassName(StringLength);
            }

            if(FieldType == FieldType.Enum || FieldType == FieldType.Message)
            {
                return TypeName;
            }

            ExceptionUtils.Throw("protocsstruct filed type error type {0} filed {1}"
                , TypeName, Name);

            return "";
        }

        public string GetRepeatedFiledTypeNameInCSharp()
        {
            string repeatedTypeName = "";

            if (FieldType == FieldType.Bool)
            {
                repeatedTypeName = "Bool";
            }

            if (FieldType == FieldType.Int32)
            {
                repeatedTypeName = "Int";
            }

            if (FieldType == FieldType.UInt32)
            {
                repeatedTypeName = "Uint";
            }

            if (FieldType == FieldType.Int64)
            {
                repeatedTypeName = "Long";
            }

            if (FieldType == FieldType.UInt64)
            {
                repeatedTypeName = "Ulong";
            }

            if (FieldType == FieldType.Bytes)
            {
                repeatedTypeName = "Byte";
            }

            if (FieldType == FieldType.Enum
                || FieldType == FieldType.Message)
            {
                repeatedTypeName = TypeName;
            }

            if (FieldType == FieldType.String)
            {
                repeatedTypeName = FieldTypeUtils.GetFixedStringClassName(StringLength);
            }

            RepeatedFiledTypeNameInCSharp = FieldTypeUtils.GetRepeatedMessageClassName(repeatedTypeName, RepeatedCount);

            return RepeatedFiledTypeNameInCSharp;
        }
    }
}