using FlutterCodeGenerator.Helper;
using System;
using System.Collections.Generic;
using System.Text;

namespace FlutterCodeGenerator.ModelTypes
{
    internal class ComplexModelType : ModelType
    {
        public List<ModelType> Children { get; set; }

        public ComplexModelType(Type type, string name) : base(type, name)
        {
            Children = new List<ModelType>();
        }

        protected virtual string ToJson(List<ModelType> Children)
        {
            var source = new StringBuilder();
            source.AppendLine("\tMap<String, dynamic> toJson() {");
            source.AppendLine("\t\tfinal map = Map<String, dynamic>();");
            foreach (var child in Children)
            {
                if (child is EnumModelType)
                {
                    source.AppendLine($"\t\tmap['{child.Name_Upper}'] = {child.Name_Lower}.index;");
                }
                else if (child is EnumNullableModelType)
                {
                    source.AppendLine($"\t\tif ({child.Name_Lower} != null)");
                    source.AppendLine($"\t\tmap['{child.Name_Upper}'] = {child.Name_Lower}?.index;");
                }
                else if (child.DefaultValue != null)
                {
                    source.AppendLine($"\t\tmap['{child.Name_Upper}'] = {child.Name_Lower};");
                }
                else if (child is DateTimeModelType)
                {
                    source.AppendLine($"\t\tif ({child.Name_Lower} != null)");
                    source.AppendLine($"\t\t\tmap['{child.Name_Upper}'] = JsonRpcUtils.dateFormat({child.Name_Lower}!);");
                }
                else if (child is ListModelType listModelType)
                {
                    if (listModelType.GenericArgumentModelType is EnumModelType)
                    {
                        source.AppendLine($"\t\tif ({child.Name_Lower} != null) {{");
                        source.AppendLine($"\t\t\tList<int> {child.Name_Lower}List = [];");
                        source.AppendLine($"\t\t\t{child.Name_Lower}!.forEach((e) => {child.Name_Lower}List.add(e.index));");
                        source.AppendLine($"\t\t\tmap['{child.Name_Upper}'] = {child.Name_Lower}List;");
                        source.AppendLine($"\t\t}}");
                    }
                    else
                    {
                        source.AppendLine($"\t\tif ({child.Name_Lower} != null)");
                        source.AppendLine($"\t\t\tmap['{child.Name_Upper}'] = {child.Name_Lower};");
                    }
                }
                else
                {
                    source.AppendLine($"\t\tif ({child.Name_Lower} != null)");
                    source.AppendLine($"\t\t\tmap['{child.Name_Upper}'] = {child.Name_Lower};");
                }
            }
            source.AppendLine("\t\treturn map;");
            source.AppendLine("\t}");
            return source.ToString();
        }

        protected virtual string FromJson(List<ModelType> Children)
        {
            var source = new StringBuilder();
            string flutterTypeName = null;
            if (this is UserDefinedGenericModelType)
            {
                flutterTypeName = GetFlutterTypeName(false, false, true);
            }
            else
            {
                flutterTypeName = GetFlutterTypeName();
            }

            source.AppendLine($"\tfactory {flutterTypeName}.fromJson(Map<String, dynamic> map) {{");
            foreach (var child in Children)
            {
                if (child is ArrayModelType)
                {
                    source.AppendLine($"\t\tfinal {child.Name_Lower}Data = map['{child.Name_Upper}'];");
                }
                else if (child is ListModelType listModelType)
                {
                    if (this is UserDefinedGenericModelType type)
                    {
                        if (type.GenericArgumentModelType.ParameterType == listModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\tList<T> {listModelType.Name_Lower}List = [];");
                            source.AppendLine($"\t\tif (map['{listModelType.Name_Upper}'] != null) {{");
                            source.AppendLine($"\t\t\t{listModelType.Name_Lower}List.addAll(");
                            source.AppendLine($"\t\t\t\t\t(map['{listModelType.Name_Upper}'] as List).map((e) => FJsonConvert.fromJson<T>(e)!));");
                            source.AppendLine($"\t\t}}");
                        }
                    }
                    else if (this is UserDefinedDerivedModelType derivedModelType && derivedModelType.BaseType is UserDefinedGenericModelType baseType)
                    {
                        if (baseType.GenericArgumentModelType.ParameterType == listModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\tList<{listModelType.GenericArgumentModelType.GetFlutterTypeName()}> {listModelType.Name_Lower}List = [];");
                            source.AppendLine($"\t\tif (map['{listModelType.Name_Upper}'] != null) {{");
                            source.AppendLine($"\t\t\t{listModelType.Name_Lower}List.addAll(");
                            source.AppendLine($"\t\t\t\t\t(map['{listModelType.Name_Upper}'] as List).map((e) => FJsonConvert.fromJson<{listModelType.GenericArgumentModelType.GetFlutterTypeName()}>(e)!));");
                            source.AppendLine($"\t\t}}");
                        }
                    }
                }
                else if (child is UserDefinedGenericModelType userDefinedGenericComplexModelType)
                {
                    if (this is UserDefinedGenericModelType type)
                    {
                        if (type.GenericArgumentModelType.ParameterType == userDefinedGenericComplexModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\tList<T> {userDefinedGenericComplexModelType.Name_Lower}List = [];");
                            source.AppendLine($"\t\tif (map['{userDefinedGenericComplexModelType.Name_Upper}'] != null) {{");
                            source.AppendLine($"\t\t\t{userDefinedGenericComplexModelType.Name_Lower}List.addAll(");
                            source.AppendLine($"\t\t\t\t\t(map['{userDefinedGenericComplexModelType.Name_Upper}'] as List).map((e) => FJsonConvert.fromJson<T>(e)!));");
                            source.AppendLine($"\t\t}}");
                        }
                        else if (this is UserDefinedDerivedModelType derivedModelType && derivedModelType.BaseType is UserDefinedGenericModelType baseType)
                        {
                            if (baseType.GenericArgumentModelType.ParameterType == userDefinedGenericComplexModelType.GenericArgumentModelType.ParameterType)
                            {
                                source.AppendLine($"\t\tList<{userDefinedGenericComplexModelType.GenericArgumentModelType.ParameterType}> {userDefinedGenericComplexModelType.Name_Lower}List = [];");
                                source.AppendLine($"\t\tif (map['{userDefinedGenericComplexModelType.Name_Upper}'] != null) {{");
                                source.AppendLine($"\t\t\t{userDefinedGenericComplexModelType.Name_Lower}List.addAll(");
                                source.AppendLine($"\t\t\t\t\t(map['{userDefinedGenericComplexModelType.Name_Upper}'] as List).map((e) => FJsonConvert.fromJson<{userDefinedGenericComplexModelType.GenericArgumentModelType.ParameterType}>(e)!));");
                                source.AppendLine($"\t\t}}");
                            }
                        }
                    }
                }
                else if (child is DictionaryModelType dictionaryModelType)
                {
                    var argumentName1 = dictionaryModelType.GenericArgumentModelTypeList[0].GetFlutterTypeName();
                    var argumentName2 = dictionaryModelType.GenericArgumentModelTypeList[1].GetFlutterTypeName();
                    if (dictionaryModelType.GenericArgumentModelTypeList[0] is SimpleModelType && dictionaryModelType.GenericArgumentModelTypeList[1] is SimpleModelType)
                    {
                    }
                    else
                    {
                        source.AppendLine($"\t\tfinal {child.Name_Lower}Map= <{argumentName1},{argumentName2}>{{}};");
                        source.AppendLine($"\t\tfor (var key in map['{child.Name_Upper}'].keys) {{");
                        source.AppendLine($"\t\t\t{child.Name_Lower}Map[key] = {argumentName2}.fromJson(map['{child.Name_Upper}'][key]);");
                        source.AppendLine($"\t\t}}");
                    }
                }
            }
            source.AppendLine($"\t\treturn {flutterTypeName}( ");
            foreach (var child in Children)
            {
                if (child is EnumModelType)
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: {child.GetFlutterTypeName()}.values.firstWhere((e) => e.index == map['{child.Name_Upper}']),");
                }
                else if (child is EnumNullableModelType)
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? {child.GetFlutterTypeName()}.values.firstWhere((e) => e.index == map['{child.Name_Upper}']) : null,");
                }
                else if (child is ArrayModelType)
                {
                    var arrayTypeName = child.ParameterType.FullName.Replace("[]", string.Empty);
                    var arrayType = child.ParameterType.Assembly.GetType(arrayTypeName);
                    var modelType = ModelTypeGenerator.Create(arrayType, "");
                    if (modelType is ByteModelType)
                    {
                        source.AppendLine($"\t\t\t{child.Name_Lower}: {child.Name_Lower}Data != null ? ({child.Name_Lower}Data as List).map((e) => e as int).toList(): null,");
                    }
                    else if (modelType is SimpleModelType && (modelType is ExtraObjectModelType))
                    {
                        source.AppendLine($"\t\t\t{child.Name_Lower}: {child.Name_Lower}Data != null ? ({child.Name_Lower}Data as List).map((e) => e as {child.ParameterType.Name.Replace("[]", string.Empty)}).toList(): null,");
                    }
                    else if (modelType is SimpleModelType)
                    {
                        source.AppendLine($"\t\t\t{child.Name_Lower}:  map['{child.Name_Lower}']?.cast<{child.ParameterType.Name.Replace("[]", string.Empty)}>().toList(),");
                    }
                    else
                    {
                        source.AppendLine($"\t\t\t{child.Name_Lower}: {child.Name_Lower}Data != null ? ({child.Name_Lower}Data as List).map((e) => {child.ParameterType.Name.Replace("[]", string.Empty)}.fromJson(e)).toList(): null,");
                    }
                }
                else if (child is DateTimeModelType)
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? DateTime.parse(map['{child.Name_Upper}']) : null,");
                }
                else if (child is ListModelType listModelType)
                {
                    if (this is UserDefinedGenericModelType type)
                    {
                        if (type.GenericArgumentModelType.ParameterType == listModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\t\t{child.Name_Lower}: {listModelType.Name_Lower}List,");
                        }
                        else if (listModelType.GenericArgumentModelType is SimpleModelType && !(listModelType.GenericArgumentModelType is ExtraObjectModelType))
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{model}>().toList(),");
                        }
                        else if (listModelType.GenericArgumentModelType is EnumModelType)
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.values.firstWhere((i) => i.index == e)).toList() : null,");
                        }
                        else
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.fromJson(e as Map<String,dynamic>)).toList() : null,");
                        }
                    }
                    else if (this is UserDefinedDerivedModelType definedDerivedModelType && definedDerivedModelType.BaseType is UserDefinedGenericModelType baseType)
                    {
                        if (baseType.GenericArgumentModelType.ParameterType == listModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\t\t{child.Name_Lower}: {listModelType.Name_Lower}List,");
                        }
                        else if (listModelType.GenericArgumentModelType is SimpleModelType && !(listModelType.GenericArgumentModelType is ExtraObjectModelType))
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{model}>().toList(),");
                        }
                        else if (listModelType.GenericArgumentModelType is EnumModelType)
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.values.firstWhere((i) => i.index == e)).toList() : null,");
                        }
                        else
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.fromJson(e as Map<String,dynamic>)).toList() : null,");
                        }
                    }
                    else if (this is UserDefinedModelType || this is UserDefinedDerivedModelType)
                    {
                        if (listModelType.GenericArgumentModelType is SimpleModelType && !(listModelType.GenericArgumentModelType is ExtraObjectModelType))
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{model}>().toList(),");
                        }
                        else if (listModelType.GenericArgumentModelType is EnumModelType)
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.values.firstWhere((i) => i.index == e)).toList() : null,");
                        }
                        else
                        {
                            var model = listModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.fromJson(e as Map<String,dynamic>)).toList() : null,");
                        }
                    }
                }
                else if (child is DictionaryModelType dictionaryModelType)
                {
                    var argumentName1 = dictionaryModelType.GenericArgumentModelTypeList[0].GetFlutterTypeName();
                    var argumentName2 = dictionaryModelType.GenericArgumentModelTypeList[1].GetFlutterTypeName();
                    if(dictionaryModelType.GenericArgumentModelTypeList[0] is SimpleModelType && dictionaryModelType.GenericArgumentModelTypeList[1] is SimpleModelType)
                    {
                        source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{argumentName1},{argumentName2}>(),");
                    }
                    else
                    {
                        source.AppendLine($"\t\t\t {child.Name_Lower} : {child.Name_Lower}Map");
                    }
                }
                else if (child is UserDefinedGenericModelType userDefinedGenericModelType)
                {
                    if (this is UserDefinedGenericModelType type)
                    {
                        if (type.GenericArgumentModelType.ParameterType == userDefinedGenericModelType.GenericArgumentModelType.ParameterType)
                        {
                            source.AppendLine($"\t\t\t{child.Name_Lower}: {userDefinedGenericModelType.Name_Lower}List,");
                        }
                        else if (userDefinedGenericModelType.GenericArgumentModelType is SimpleModelType && !(userDefinedGenericModelType.GenericArgumentModelType is ExtraObjectModelType))
                        {
                            var model = userDefinedGenericModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{model}>().toList(),");
                        }
                        else if (userDefinedGenericModelType.GenericArgumentModelType is EnumModelType)
                        {
                            var model = userDefinedGenericModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.values.firstWhere((i) => i.index == e)).toList() : null,");
                        }
                        else
                        {
                            var model = userDefinedGenericModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.fromJson(e as Map<String,dynamic>)).toList() : null,");
                        }
                    }
                    else if (this is UserDefinedModelType)
                    {
                        if (userDefinedGenericModelType.GenericArgumentModelType is SimpleModelType && !(userDefinedGenericModelType.GenericArgumentModelType is ExtraObjectModelType))
                        {
                            var model = userDefinedGenericModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}']?.cast<{model}>().toList(),");
                        }
                        else if (userDefinedGenericModelType.GenericArgumentModelType is EnumModelType)
                        {
                            var model = userDefinedGenericModelType.GenericArgumentModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? (map['{child.Name_Upper}'] as List).map((e)=>{model}.values.firstWhere((i) => i.index == e)).toList() : null,");
                        }
                        else
                        {
                            var model = userDefinedGenericModelType.GetFlutterTypeName();
                            source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? {model}.fromJson(map['{child.Name_Upper}'] as Map<String,dynamic>) : null,");
                        }
                    }
                }
                else if (child is UserDefinedModelType || child is UserDefinedDerivedModelType || child is ExtraObjectModelType)
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'] != null ? {child.GetFlutterTypeName()}.fromJson(map['{child.Name_Upper}']) : null,");
                }
                else if (child is DoubleModelType)
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: double.parse(map['{child.Name_Upper}'].toString()),");
                }
                else
                {
                    source.AppendLine($"\t\t\t{child.Name_Lower}: map['{child.Name_Upper}'],");
                }
            }
            source.AppendLine("\t\t);");
            source.AppendLine("\t}");
            source.AppendLine();
            return source.ToString();
        }
    }
}