using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Convention.RScript.Variable.CStyle
{
    public class CScriptRScriptVariableGenerater : RScriptInjectVariableGenerater
    {
        public static string GetTypename(Type type)
        {
            var name = type.Name.Replace('`', '_');
            return name;
        }

        private int m_layer = 0;
        private int layer
        {
            get=>m_layer;
            set
            {
                m_layer = value;
                Prefix = new('\t', layer);
            }
        }
        private string Prefix = "";

        public CScriptRScriptVariableGenerater(Type targetType, Generater generater, Destorier destorier, string name) : base(targetType, generater, destorier, name)
        {
        }

        protected override string WriteClassBodyEnter(Type currentType)
        {
            string result = $"{Prefix}{"{"}\n{Prefix}public:";
            layer++;
            return result;
        }

        protected override string WriteClassBodyExit(Type currentType)
        {
            layer--;
            return $"{Prefix}{"};"}";
        }

        protected override string WriteClassHead(Type currentType)
        {
            string description = string.IsNullOrEmpty(this.description) ? "" : string.Join("", from item in this.description.Split('\n') where string.IsNullOrEmpty(item) == false select $"{Prefix}{item}\n");
            string suffix = currentType.BaseType == typeof(object) ? string.Empty : $" : public {GetTypename(currentType.BaseType)}";
            string result = $"{Prefix}\\*{description}*\\\n{Prefix}{Prefix}class {GetTypename(currentType)}{suffix}";
            return result;
        }

        protected override string WriteClassMethod(Type returnType, string methodName, string[] parameterNames, Type[] parameterTypes)
        {
            List<string> parameters = new();
            for (int i = 0, e = parameterNames.Length; i < e; i++)
            {
                parameters.Add($"{GetTypename(parameterTypes[i])} {parameterNames[i]}");
            }
            return $"{Prefix}{GetTypename(returnType)} {methodName}({string.Join(", ", parameters)});";
        }

        protected override string WriteClassTail(Type currentType)
        {
            return "";
        }

        protected override string WriteEnumBodyEnter(Type currentType)
        {
            string result = $"{Prefix}{"{"}";
            layer++;
            return result;
        }

        protected override string WriteEnumBodyExit(Type currentType)
        {
            layer--;
            return $"{Prefix}{"};"}";
        }

        protected override string WriteEnumHead(Type currentEnum)
        {
            return $"{Prefix}enum {GetTypename(currentEnum)}";
        }

        protected override string WriteEnumName(string enumName)
        {
            return $"{Prefix}{enumName},";
        }

        protected override string WriteEnumTail(Type currentType)
        {
            return "";
        }

        protected override string WritePageEnd(Type currentType)
        {
            return "";
        }

        protected override string WritePageHead(Type currentType)
        {
            return $"#include\"{GetFilename(currentType)}\"";
        }

        public override string GetFilename(Type currentType)
        {
            return GetTypename(currentType);
        }
    }
}