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using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.CodeGeneration;
using Tango.DAL.Remote.DB;

namespace Tango.DAL.Observables
{
    public class ObservablesGenerator
    {
        public void Generate(String targetPath)
        {
            foreach (var table in typeof(RemoteDB).GetProperties().Where(x => typeof(IEnumerable).IsAssignableFrom(x.PropertyType)))
            {
                EntityCodeFile codeFile = new EntityCodeFile(ObservableEntity.DalNameToStandardName(table.Name).Singularize())
                {
                    EntityName = table.Name.Singularize(),
                    TableName = table.Name,
                };

                foreach (var field in table.PropertyType.GenericTypeArguments.First().GetProperties().Skip(4))
                {
                    EntityCodeFileField codeField = new EntityCodeFileField();
                    codeField.FieldName = field.Name;
                    codeField.Name = ObservableEntity.DalNameToStandardName(field.Name);
                    codeField.Description = field.Name.Replace("_", " ").ToLower();


                    if (field.PropertyType.IsGenericType)
                    {
                        codeField.Type = String.Format("ObservableCollection<{0}>", ObservableEntity.DalNameToStandardName(field.PropertyType.GenericTypeArguments.Single().Name).Singularize());
                        codeField.Construct = true;
                    }
                    else
                    {
                        if (field.PropertyType.IsClass && field.PropertyType != typeof(String))
                        {
                            codeField.Type = ObservableEntity.DalNameToStandardName(field.PropertyType.Name).Singularize();
                            codeField.Construct = true;
                        }
                        else
                        {
                            codeField.Type = field.PropertyType.Name;
                        }
                    }
                    codeFile.Fields.Add(codeField);
                }

                String code = codeFile.GenerateCode();

                File.WriteAllText(Path.Combine(targetPath, codeFile.Name + ".cs"), code);
            }
        }
    }
}