using System.ComponentModel;
using System.Reflection;

namespace DS.Module.Core.Extensions;

/// <summary>
///  实体拓展方法
/// </summary>
public static class EntityExtensions
{
    public static Type GetEntity(this string entityName)
    {
        // 获取当前程序集
        Assembly assembly = Assembly.Load("DS.WMS.Core");

        // 获取所有类型
        Type[] types = assembly.GetTypes();

        var t = types.Where(a => a.Name == entityName).FirstOrDefault();
        // Type type = null;
        // if (t != null)
        // {
        //     type = Type.GetType(t.FullName, true, true);
        // }

        var temp = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).GetValue(0);
        return t;
    }

    public static List<EntityFieldProperty> GetEntityFieldByName(this string entityName)
    {
        var res = new List<EntityFieldProperty>();
        // 获取当前程序集
        Assembly assembly = Assembly.Load("DS.WMS.Core");

        // 获取所有类型
        Type[] types = assembly.GetTypes();

        var t = types.Where(a => a.Name == entityName).FirstOrDefault();
        PropertyInfo[] properties = t.GetProperties();
        var entiyName = t.Name;
        if (properties.Length <= 0)
        {
            return res;
        }
        foreach (PropertyInfo item in properties)
        {
            string name = item.Name; //名称
            // object value = item.GetValue(t, null);  //值
            string des = ((DescriptionAttribute)Attribute.GetCustomAttribute(item, typeof(DescriptionAttribute))).Description;// 属性值
            if (string.IsNullOrEmpty(des)) des = name;
            if (item.PropertyType.IsValueType || item.PropertyType.Name.StartsWith("String"))
            {
                var typeName = item.PropertyType.Name;
                if (Nullable.GetUnderlyingType(item.PropertyType) != null)
                {
                    typeName = Nullable.GetUnderlyingType(item.PropertyType).Name;
                }
                res.Add(new EntityFieldProperty
                {
                    FieldName = name,
                    EntityName = entiyName,
                    FieldComment = des,
                    FieldType = typeName
                }
                );
            }
        }

        return res;

        // var temp = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).GetValue(0);
        // return t;
    }

    /// <summary>
    /// 获取实体字段信息
    /// </summary>
    /// <param name="t"></param>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static List<EntityFieldProperty> GetEntityFieldProperty<T>(this T t)
    {
        var res = new List<EntityFieldProperty>();
        if (t == null)
        {
            return res;
        }
        PropertyInfo[] properties = t.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
        var entiyName = t.GetType().Name;
        if (properties.Length <= 0)
        {
            return res;
        }
        foreach (PropertyInfo item in properties)
        {
            string name = item.Name; //名称
            object value = item.GetValue(t, null);  //值
            string des = ((DescriptionAttribute)Attribute.GetCustomAttribute(item, typeof(DescriptionAttribute))).Description;// 属性值
            if (string.IsNullOrEmpty(des)) des = name;
            if (item.PropertyType.IsValueType || item.PropertyType.Name.StartsWith("String"))
            {
                var typeName = item.PropertyType.Name;
                if (Nullable.GetUnderlyingType(item.PropertyType) != null)
                {
                    typeName = Nullable.GetUnderlyingType(item.PropertyType).Name;
                }
                res.Add(new EntityFieldProperty
                {
                    FieldName = name,
                    EntityName = entiyName,
                    FieldComment = des,
                    FieldType = typeName
                }
                );
            }
        }

        return res;
    }
}

public class EntityFieldProperty
{
    /// <summary>
    /// 实体名称
    /// </summary>
    [Description("实体名称")]
    public string EntityName { get; set; }

    /// <summary>
    /// 字段名称
    /// </summary>
    [Description("字段名称")]
    public string FieldName { get; set; }

    /// <summary>
    /// 字段描述
    /// </summary>
    [Description("字段描述")]
    public string FieldComment { get; set; }

    /// <summary>
    /// 字段类型
    /// </summary>
    [Description("字段类型")]
    public string FieldType { get; set; }
}