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

namespace MECF.Framework.Common.Utilities
{
    public sealed class CloneUtil
    {
        public static bool CheckIsChanged<T>(T OldValue, T NewValue)
        {
            Type typeSource = OldValue.GetType();
            PropertyInfo[] propertyInfo = typeSource.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            Type typeNewSource = NewValue.GetType();
            PropertyInfo[] newPropertyInfo = typeNewSource.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            foreach (PropertyInfo property in propertyInfo)
            {
                //Check whether property can be written to
                if (!property.CanWrite) continue;
                if (property.Name == "IsNotifying") continue;
                //check whether property type is value type, enum or string type
                if (property.PropertyType.IsPrimitive || property.PropertyType.IsEnum)
                {
                    var newProperty = newPropertyInfo.Where(x => x.Name == property.Name).FirstOrDefault();
                    if (property.GetValue(OldValue, null) != newProperty.GetValue(NewValue, null))
                    {
                        return false;
                    }
                }
                else if (property.PropertyType == typeof(string))
                {
                    var oldPropertyValue = property.GetValue(OldValue, null) == null ? "" : property.GetValue(OldValue, null);
                    var newProperty = newPropertyInfo.Where(x => x.Name == property.Name).FirstOrDefault();
                    var newPropertyValue = newProperty.GetValue(NewValue, null) == null ? "" : newProperty.GetValue(NewValue, null);
                    if (oldPropertyValue != newPropertyValue)
                    {
                        return false;
                    }
                }
            }
            return true;
        }

        public static object CloneObject(object objSource)
        {
            //Get the type of source object and create a new instance of that type
            Type typeSource = objSource.GetType();
            object objTarget = Activator.CreateInstance(typeSource);
            //Get all the properties of source object type
            PropertyInfo[] propertyInfo = typeSource.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            //Assign all source property to taget object 's properties




            foreach (PropertyInfo property in propertyInfo)
            {
                //Check whether property can be written to
                if (!property.CanWrite) continue;
                if (property.Name == "StepNo") continue;
                //check whether property type is value type, enum or string type
                if (property.PropertyType.IsPrimitive || property.PropertyType.IsEnum || property.PropertyType == typeof(string))
                {
                    property.SetValue(objTarget, property.GetValue(objSource, null), null);
                }
                else if (typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
                {
                    //Include List and Dictionary and......
                    if (property.PropertyType.IsGenericType)
                    {
                        var cloneObj = Activator.CreateInstance(property.PropertyType);

                        var addMethod = property.PropertyType.GetMethod("Add", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

                        Debug.Assert(null != addMethod);

                        var currentValues = property.GetValue(objSource, null) as IEnumerable;
                        if (currentValues == null)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            if (cloneObj is IDictionary)
                            {
                                cloneObj = cloneObj as IDictionary;
                                foreach (var currentValue in currentValues)
                                {
                                    var propInfoKey = currentValue.GetType().GetProperty("Key");
                                    var propInfoValue = currentValue.GetType().GetProperty("Value");
                                    if (propInfoKey != null && propInfoValue != null)
                                    {
                                        var keyValue = propInfoKey.GetValue(currentValue, null);
                                        var valueValue = propInfoValue.GetValue(currentValue, null);

                                        object finalKeyValue, finalValueValue;

                                        //Get finalKeyValue
                                        var currentKeyType = keyValue.GetType();
                                        if (currentKeyType.IsPrimitive || currentKeyType.IsEnum || currentKeyType == typeof(string))
                                        {
                                            finalKeyValue = keyValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObject(keyValue);
                                            finalKeyValue = copyObj;
                                        }

                                        //Get finalValueValue
                                        var currentValueType = valueValue.GetType();
                                        if (currentValueType.IsPrimitive || currentValueType.IsEnum || currentValueType == typeof(string))
                                        {
                                            finalValueValue = valueValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObject(valueValue);
                                            finalValueValue = copyObj;
                                        }

                                        addMethod.Invoke(cloneObj, new[] { finalKeyValue, finalValueValue });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                            //Common IList type
                            else
                            {
                                foreach (var currentValue in currentValues)
                                {
                                    var currentType = currentValue.GetType();
                                    if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                    {
                                        addMethod.Invoke(cloneObj, new[] { currentValue });
                                    }
                                    else
                                    {
                                        //Reference type
                                        var copyObj = CloneObject(currentValue);
                                        addMethod.Invoke(cloneObj, new[] { copyObj });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                        }
                    }
                    //Array type
                    else
                    {
                        var currentValues = property.GetValue(objSource, null) as Array;
                        if (null == currentValues)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            var cloneObj = Activator.CreateInstance(property.PropertyType, currentValues.Length) as Array;
                            var arrayList = new ArrayList();
                            for (var i = 0; i < currentValues.Length; i++)
                            {
                                var currentType = currentValues.GetValue(i).GetType();
                                if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                {
                                    arrayList.Add(currentValues.GetValue(i));
                                }
                                else
                                {
                                    //Reference type
                                    var copyObj = CloneObject(currentValues.GetValue(i));
                                    arrayList.Add(copyObj);
                                }
                            }
                            arrayList.CopyTo(cloneObj, 0);
                            property.SetValue(objTarget, cloneObj, null);
                        }
                    }
                }
                //else property type is object/complex types, so need to recursively call this method until the end of the tree is reached
                else
                {
                    object objPropertyValue = property.GetValue(objSource, null);
                    if (objPropertyValue == null)
                    {
                        property.SetValue(objTarget, null, null);
                    }
                    else if (objPropertyValue.GetType().IsPrimitive || objPropertyValue.GetType().IsEnum || objPropertyValue.GetType() == typeof(string))
                    {
                        property.SetValue(objTarget, objPropertyValue, null);
                    }
                    else
                    {
                        property.SetValue(objTarget, CloneObject(objPropertyValue), null);
                    }
                }
            }

            return objTarget;
        }


        public static object CloneObjectSetFlag(object objSource, string flag, bool setValue)
        {
            //Get the type of source object and create a new instance of that type
            Type typeSource = objSource.GetType();
            object objTarget = Activator.CreateInstance(typeSource);
            //Get all the properties of source object type
            PropertyInfo[] propertyInfo = typeSource.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            //Assign all source property to taget object 's properties




            foreach (PropertyInfo property in propertyInfo)
            {
                //Check whether property can be written to
                if (!property.CanWrite) continue;
                if (property.Name == "StepNo") continue;
                //check whether property type is value type, enum or string type
                if (property.PropertyType.IsPrimitive || property.PropertyType.IsEnum || property.PropertyType == typeof(string))
                {
                    if (property.Name.Contains(flag))
                    { }
                    else
                    {
                        property.SetValue(objTarget, property.GetValue(objSource, null), null);
                    }
                }
                else if (typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
                {
                    //Include List and Dictionary and......
                    if (property.PropertyType.IsGenericType)
                    {
                        var cloneObj = Activator.CreateInstance(property.PropertyType);

                        var addMethod = property.PropertyType.GetMethod("Add", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

                        Debug.Assert(null != addMethod);

                        var currentValues = property.GetValue(objSource, null) as IEnumerable;
                        if (currentValues == null)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            if (cloneObj is IDictionary)
                            {
                                cloneObj = cloneObj as IDictionary;
                                foreach (var currentValue in currentValues)
                                {
                                    var propInfoKey = currentValue.GetType().GetProperty("Key");
                                    var propInfoValue = currentValue.GetType().GetProperty("Value");
                                    if (propInfoKey != null && propInfoValue != null)
                                    {
                                        var keyValue = propInfoKey.GetValue(currentValue, null);
                                        var valueValue = propInfoValue.GetValue(currentValue, null);

                                        object finalKeyValue, finalValueValue;

                                        //Get finalKeyValue
                                        var currentKeyType = keyValue.GetType();
                                        if (currentKeyType.IsPrimitive || currentKeyType.IsEnum || currentKeyType == typeof(string))
                                        {
                                            finalKeyValue = keyValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObjectSetFlag(keyValue, flag, setValue);
                                            finalKeyValue = copyObj;
                                        }

                                        //Get finalValueValue
                                        var currentValueType = valueValue.GetType();
                                        if (currentValueType.IsPrimitive || currentValueType.IsEnum || currentValueType == typeof(string))
                                        {
                                            finalValueValue = valueValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObjectSetFlag(valueValue, flag, setValue);
                                            finalValueValue = copyObj;
                                        }

                                        addMethod.Invoke(cloneObj, new[] { finalKeyValue, finalValueValue });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                            //Common IList type
                            else
                            {
                                foreach (var currentValue in currentValues)
                                {
                                    var currentType = currentValue.GetType();
                                    if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                    {
                                        addMethod.Invoke(cloneObj, new[] { currentValue });
                                    }
                                    else
                                    {
                                        //Reference type
                                        var copyObj = CloneObjectSetFlag(currentValue, flag, setValue);
                                        addMethod.Invoke(cloneObj, new[] { copyObj });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                        }
                    }
                    //Array type
                    else
                    {
                        var currentValues = property.GetValue(objSource, null) as Array;
                        if (null == currentValues)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            var cloneObj = Activator.CreateInstance(property.PropertyType, currentValues.Length) as Array;
                            var arrayList = new ArrayList();
                            for (var i = 0; i < currentValues.Length; i++)
                            {
                                var currentType = currentValues.GetValue(i).GetType();
                                if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                {
                                    arrayList.Add(currentValues.GetValue(i));
                                }
                                else
                                {
                                    //Reference type
                                    var copyObj = CloneObjectSetFlag(currentValues.GetValue(i), flag, setValue);
                                    arrayList.Add(copyObj);
                                }
                            }
                            arrayList.CopyTo(cloneObj, 0);
                            property.SetValue(objTarget, cloneObj, null);
                        }
                    }
                }
                //else property type is object/complex types, so need to recursively call this method until the end of the tree is reached
                else
                {
                    object objPropertyValue = property.GetValue(objSource, null);
                    if (objPropertyValue == null)
                    {
                        property.SetValue(objTarget, null, null);
                    }
                    else if (objPropertyValue.GetType().IsPrimitive || objPropertyValue.GetType().IsEnum || objPropertyValue.GetType() == typeof(string))
                    {
                        property.SetValue(objTarget, objPropertyValue, null);
                    }
                    else
                    {
                        property.SetValue(objTarget, CloneObjectSetFlag(objPropertyValue, flag, setValue), null);
                    }
                }
            }

            return objTarget;
        }


        public static object CloneAllObject(object objSource)
        {
            //Get the type of source object and create a new instance of that type
            Type typeSource = objSource.GetType();
            object objTarget = Activator.CreateInstance(typeSource);
            //Get all the properties of source object type
            PropertyInfo[] propertyInfo = typeSource.GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            //Assign all source property to taget object 's properties




            foreach (PropertyInfo property in propertyInfo)
            {
                //Check whether property can be written to
                if (!property.CanWrite) continue;
                //check whether property type is value type, enum or string type
                if (property.PropertyType.IsPrimitive || property.PropertyType.IsEnum || property.PropertyType == typeof(string))
                {
                    property.SetValue(objTarget, property.GetValue(objSource, null), null);
                }
                else if (typeof(IEnumerable).IsAssignableFrom(property.PropertyType))
                {
                    //Include List and Dictionary and......
                    if (property.PropertyType.IsGenericType)
                    {
                        var cloneObj = Activator.CreateInstance(property.PropertyType);

                        var addMethod = property.PropertyType.GetMethod("Add", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);

                        Debug.Assert(null != addMethod);

                        var currentValues = property.GetValue(objSource, null) as IEnumerable;
                        if (currentValues == null)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            if (cloneObj is IDictionary)
                            {
                                cloneObj = cloneObj as IDictionary;
                                foreach (var currentValue in currentValues)
                                {
                                    var propInfoKey = currentValue.GetType().GetProperty("Key");
                                    var propInfoValue = currentValue.GetType().GetProperty("Value");
                                    if (propInfoKey != null && propInfoValue != null)
                                    {
                                        var keyValue = propInfoKey.GetValue(currentValue, null);
                                        var valueValue = propInfoValue.GetValue(currentValue, null);

                                        object finalKeyValue, finalValueValue;

                                        //Get finalKeyValue
                                        var currentKeyType = keyValue.GetType();
                                        if (currentKeyType.IsPrimitive || currentKeyType.IsEnum || currentKeyType == typeof(string))
                                        {
                                            finalKeyValue = keyValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObject(keyValue);
                                            finalKeyValue = copyObj;
                                        }

                                        //Get finalValueValue
                                        var currentValueType = valueValue.GetType();
                                        if (currentValueType.IsPrimitive || currentValueType.IsEnum || currentValueType == typeof(string))
                                        {
                                            finalValueValue = valueValue;
                                        }
                                        else
                                        {
                                            //Reference type
                                            var copyObj = CloneObject(valueValue);
                                            finalValueValue = copyObj;
                                        }

                                        addMethod.Invoke(cloneObj, new[] { finalKeyValue, finalValueValue });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                            //Common IList type
                            else
                            {
                                foreach (var currentValue in currentValues)
                                {
                                    var currentType = currentValue.GetType();
                                    if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                    {
                                        addMethod.Invoke(cloneObj, new[] { currentValue });
                                    }
                                    else
                                    {
                                        //Reference type
                                        var copyObj = CloneObject(currentValue);
                                        addMethod.Invoke(cloneObj, new[] { copyObj });
                                    }
                                }
                                property.SetValue(objTarget, cloneObj, null);
                            }
                        }
                    }
                    //Array type
                    else
                    {
                        var currentValues = property.GetValue(objSource, null) as Array;
                        if (null == currentValues)
                        {
                            property.SetValue(objTarget, null, null);
                        }
                        else
                        {
                            var cloneObj = Activator.CreateInstance(property.PropertyType, currentValues.Length) as Array;
                            var arrayList = new ArrayList();
                            for (var i = 0; i < currentValues.Length; i++)
                            {
                                var currentType = currentValues.GetValue(i).GetType();
                                if (currentType.IsPrimitive || currentType.IsEnum || currentType == typeof(string))
                                {
                                    arrayList.Add(currentValues.GetValue(i));
                                }
                                else
                                {
                                    //Reference type
                                    var copyObj = CloneObject(currentValues.GetValue(i));
                                    arrayList.Add(copyObj);
                                }
                            }
                            arrayList.CopyTo(cloneObj, 0);
                            property.SetValue(objTarget, cloneObj, null);
                        }
                    }
                }
                //else property type is object/complex types, so need to recursively call this method until the end of the tree is reached
                else
                {
                    object objPropertyValue = property.GetValue(objSource, null);
                    if (objPropertyValue == null)
                    {
                        property.SetValue(objTarget, null, null);
                    }
                    else if (objPropertyValue.GetType().IsPrimitive || objPropertyValue.GetType().IsEnum || objPropertyValue.GetType() == typeof(string))
                    {
                        property.SetValue(objTarget, objPropertyValue, null);
                    }
                    else
                    {
                        property.SetValue(objTarget, CloneObject(objPropertyValue), null);
                    }
                }
            }

            return objTarget;
        }
    }
}