using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CoderEngine
{
    public class JavaCodeWrite
    {
        private string CodeStr = "";

        /// <summary>
        /// 一个代码缩进
        /// </summary>
        private string tabstr = "    ";

        /// <summary>
        /// 逐行添加代码
        /// </summary>
        /// <param name="codeline"></param>
        /// <returns></returns>
        public void CoderAddLine(string CodeLine)
        {
            CodeStr += CodeLine + "\n";
        }

        public string ModelToJavaCode(string _AssemblyName, string _TypeName)
        {
            TypeMode tm = new _ModleReader().ModelCheck(_AssemblyName, _TypeName);
            ModelToJavaCodeWriter(tm);
            return CodeStr;
        }

        public void ModelToJavaCodeWriter(TypeMode TopMode)
        {
            //如果有代码嵌套的下级类 在本类外 写入新的类
            if (TopMode.TypeList != null && TopMode.TypeList.Count > 0)
            {
                CoderAddLine(tabstr);
                JavaCodeDownRecursion(TopMode);
            }
        }


        public void JavaCodeDownRecursion(TypeMode TopMode)
        {
            string ClassName = "";
            //如果自己就是集合类型 则取类型下名字
            if (TopMode.MemberType.Name == "List`1")
            {
                //FullName的值为 "System.Collections.Generic.List`1[[  --集合内嵌类型名称--, CoderEngine, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]"
                //其中包含内嵌List的名称 我们要将其取出  得到的值例如 “程序集.*.*类型”
                var SonParamName = TopMode.MemberType.FullName.Substring(TopMode.MemberType.FullName.IndexOf("[") + 2);
                SonParamName = SonParamName.Substring(0, SonParamName.IndexOf(","));
                ClassName = SonParamName.Substring(SonParamName.LastIndexOf(".")+1);
            }
            else
                ClassName = TopMode.MemberType.Name;

            CoderAddLine("public class " + ClassName + " {");
            foreach (var tl in TopMode.TypeList)
            {
                CoderAddLine("");
                if (tl.MemberType.Name == "List`1")
                {
                    
                }
                else
                {
                    CoderAddLine(tabstr + "@SerializedName(value = \"" + tl.Name + "\")");
                }
                CoderAddLine(tabstr + "private " + CSharpToJavaTypeName(tl.MemberType) + " " + tl.Name + ";");

            }

            CoderAddLine("");
            CoderAddLine(tabstr + "//"+ ClassName + "中所有属性对应get set 方法");

            foreach (var tl in TopMode.TypeList)
            {
                CoderAddLine("");
                CoderAddLine(tabstr + "public " + CSharpToJavaTypeName(tl.MemberType) + " get" + tl.Name + "(){return " + tl.Name + ";}");
                CoderAddLine("");
                CoderAddLine(tabstr + "public void set" + tl.Name + "(" + CSharpToJavaTypeName(tl.MemberType) + " " + tl.Name + "){return this." + tl.Name + " = " + tl.Name + ";}");
            }
            CoderAddLine("");
            CoderAddLine(tabstr+"//为该实体类生成的toString打印方法");
            CoderAddLine(tabstr+ "@Override");
            CoderAddLine(tabstr + "public String toString() {");
            CoderAddLine(tabstr + tabstr + "return \"CommentInfoModel{ \" +");
            foreach (var tl in TopMode.TypeList)
            {
                CoderAddLine(tabstr + tabstr + tabstr + "\"" + tl.Name + "='\" + " + tl.Name + " +  '\\'' + \",\" ");
            }
            CoderAddLine(tabstr + tabstr + tabstr + "'}';");

            CoderAddLine(tabstr + "}");

            CoderAddLine("}");
            

            foreach (var tl in TopMode.TypeList)
            {
                if(tl.MemberType.Name == "List`1")
                {
                    if (tl.TypeList != null && tl.TypeList.Count > 0)
                    {
                        CoderAddLine("");
                        JavaCodeDownRecursion(tl);
                    }
                }
            }

        }

        /// <summary>
        /// 转换成Java代码
        /// </summary>
        /// <returns></returns>
        public string CSharpToJavaTypeName(Type myType)
        {
            var oneinfo = CSharpToJavaTypeItem.Where(w => w.Key == myType.Name).FirstOrDefault();
            if (oneinfo.Value != null)
            {
                return oneinfo.Value;
            }
            else
            {
                if(myType.Name == "List`1")
                {
                    var SonParamName = myType.FullName.Substring(myType.FullName.IndexOf("[") + 2);
                    SonParamName = SonParamName.Substring(0, SonParamName.IndexOf(","));
                    return "List<" + SonParamName.Substring(SonParamName.LastIndexOf('.')+1) + ">";
                }
                else if (myType.Name == "Nullable`1")
                {
                    var SonParamName = myType.FullName.Substring(myType.FullName.IndexOf("[") + 2);
                    SonParamName = SonParamName.Substring(0, SonParamName.IndexOf(","));
                    return SonParamName.Substring(SonParamName.LastIndexOf('.')+1);
                }
                else
                    return "string";
            }
        }

        /// <summary>
        /// C#和Java代码对照表
        /// </summary>
        public System.Collections.Generic.Dictionary<string, string> CSharpToJavaTypeItem =
            new Dictionary<string, string>() {
                { "int","int"},
                { "Int16","int"},
                { "Int32","int"},
                { "Int64","int"},
                { "int?","int"},
                { "long","long"},
                { "long?","long"},
                { "float","float"},
                { "float?","float"},
                { "double","double"},
                { "double?","double"},
                { "boolean","boolean"},
                { "string","string"},
                { "DateTime","DateTime"},
                { "DateTime?","DateTime"},
            };
    }
}