using CppAst;

namespace refl
{
    internal class FieldData
    {
        public string Name { get; set; }
        public string Meta { get; set; }

        public FieldData(string name, string meta)
        {
            Name = name;
            Meta = meta;
        }

    }
    internal class FieldMeta
    {
        public List<FieldData> MemberList { get; set; }
        public List<FieldData> MethodList { get; set; }

        public FieldMeta()
        {
            MemberList = new List<FieldData>();
            MethodList = new List<FieldData>();
        }
    }
    internal class ClassMeta
    {
        public string Name { get; set; }
        public string ParentName { get; set; }
        public string Path { get; set; }

        public Dictionary<string, FieldMeta> Fields { get; set; }

        public ClassMeta(string name, string parentName)
        {
            Name = name;
            ParentName = parentName;
            Path = "";
            Fields = new Dictionary<string, FieldMeta>();
        }
    }
    internal class ModuleMeta
    {
        public static HashSet<string> NameSet = new HashSet<string>();
        public string NameSpace { get; set; }
        public List<ClassMeta>  ClassList;
        public List<ModuleMeta> ChildList;
        public ModuleMeta(string name_space)
        {
            NameSpace = name_space;
            ClassList = new List<ClassMeta>();
            ChildList = new List<ModuleMeta>();
        }
        public bool HasMeta()
        {
            return ClassList.Count > 0 || ChildList.Count > 0;
        }
        public static ClassMeta ParseCppClass(CppClass cppClass)
        {
            string parentName = "void";
            if (cppClass.BaseTypes.Count == 1)
            {
                var type = cppClass.BaseTypes[0].Type;
                CppClass? parent = type as CppClass;
                if (parent != null)
                {
                    parentName = parent.Name;
                }
            }
            ClassMeta cls_meta = new ClassMeta(cppClass.Name, parentName);
            foreach (var field in cppClass.Fields)
            {
                if (field.Attributes.Count == 0)
                    continue;
                foreach (var attribute in field.Attributes)
                {
                    var attr_metas = MetaToken.ParseMeta(attribute.Arguments);
                    foreach (var pair in attr_metas)
                    {
                        if (!cls_meta.Fields.ContainsKey(pair.Key))
                        {
                            cls_meta.Fields.Add(pair.Key, new FieldMeta());
                        }
                        cls_meta.Fields[pair.Key].MemberList.Add(new FieldData(field.Name, pair.Value));
                    }
                }
            }
            foreach (var func in cppClass.Functions)
            {
                if (func.Attributes.Count == 0)
                    continue;
                foreach (var attribute in func.Attributes)
                {
                    var attr_metas = MetaToken.ParseMeta(attribute.Arguments);
                    foreach (var pair in attr_metas)
                    {
                        if (!cls_meta.Fields.ContainsKey(pair.Key))
                        {
                            cls_meta.Fields.Add(pair.Key, new FieldMeta());
                        }
                        cls_meta.Fields[pair.Key].MethodList.Add(new FieldData(func.Name, pair.Value));
                    }
                }
            }
            return cls_meta;
        }
        public static ModuleMeta ParseCppNamespaces(CppNamespace cpp)
        {
            var module = new ModuleMeta(cpp.Name);
            foreach (var cppClass in cpp.Classes)
            {
                var cls_meta = ParseCppClass(cppClass);
                if(cls_meta.Fields.Count > 0)
                {
                    module.ClassList.Add(cls_meta);
                }
            }
            foreach (var spaces in cpp.Namespaces)
            {
                var child = ParseCppNamespaces(spaces);
                module.ChildList.Add(child);
            }
            return module;
        }
        public static ModuleMeta ParseCompileInfo(CppCompilation cpp)
        {
            var module = new ModuleMeta("");
            foreach (var cppClass in cpp.Classes)
            {
                var cls_meta = ParseCppClass(cppClass);
                module.ClassList.Add(cls_meta);
            }
            foreach(var spaces in cpp.Namespaces)
            {
                var child = ParseCppNamespaces(spaces);
                module.ChildList.Add(child);
            }
            ParseMetaName(module);
            return module;
        }
        public static void ParseMetaName(ModuleMeta module)
        {
            ParseClassMetaName(module);
            foreach(var child in module.ChildList)
            {
                ParseMetaName(child);
            }
        }
        public static void ParseClassMetaName(ModuleMeta module)
        {
            foreach(var cls in module.ClassList)
            {
                foreach(var field in cls.Fields)
                {
                    if (!NameSet.Contains(field.Key))
                    {
                        NameSet.Add(field.Key);
                    }
                }
            }
        }
    }
}