using Hotline.Share.Dtos.ExportWord;
using Hotline.Share.Enums.ExportWord;
using System.Reflection;

namespace Hotline.Application.ExportWord
{
    public static class IWordExportTemplateExtensions
    {
        public static IEnumerable<PlaceholderEntity> GetReplacements<T>(this T wordData) where T : IWordExportTemplate
        {
            List<PlaceholderEntity> list = new List<PlaceholderEntity>();
            PropertyInfo[] properties = typeof(T).GetProperties();
            foreach (PropertyInfo propertyInfo in properties)
            {
                PlaceholderEntity placeholderEntity = new PlaceholderEntity();
                string placeholder = (propertyInfo.IsDefined(typeof(PlaceholderAttribute)) ? propertyInfo.GetCustomAttribute<PlaceholderAttribute>().Placeholder.ToString() : ("{" + propertyInfo.Name + "}"));
                if (propertyInfo.PropertyType == typeof(string))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Text;
                    placeholderEntity.Data = new ExportText
                    {
                        Data = propertyInfo.GetValue(wordData)?.ToString()
                    };
                    list.Add(placeholderEntity);
                }
                else if (propertyInfo.PropertyType == typeof(ExportTable))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Table;
                    placeholderEntity.Data = (IWordElement)propertyInfo.GetValue(wordData);
                    list.Add(placeholderEntity);
                }
                else if (propertyInfo.PropertyType == typeof(ExportPicture))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Picture;
                    ExportPicture item = (ExportPicture)propertyInfo.GetValue(wordData);
                    placeholderEntity.Pictures = new List<ExportPicture> { item };
                    list.Add(placeholderEntity);
                }
                else if (typeof(IEnumerable<ExportPicture>).IsAssignableFrom(propertyInfo.PropertyType))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Picture;
                    IEnumerable<ExportPicture> pictures = (IEnumerable<ExportPicture>)propertyInfo.GetValue(wordData);
                    placeholderEntity.Pictures = pictures;
                    list.Add(placeholderEntity);
                }
                else if (propertyInfo.PropertyType == typeof(ExportParagraph))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Paragraph;
                    placeholderEntity.Data = (IWordElement)propertyInfo.GetValue(wordData);
                    list.Add(placeholderEntity);
                }
                else if (propertyInfo.PropertyType == typeof(ExportComplex))
                {
                    placeholderEntity.Placeholder = placeholder;
                    placeholderEntity.PlaceholderType = EPlaceholderType.Complex;
                    placeholderEntity.Data = (IWordElement)propertyInfo.GetValue(wordData);
                    list.Add(placeholderEntity);
                }
            }

            return list;
        }
    }
}