using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Reflection;
using Newtonsoft.Json;
using PetaPoco;
using Sony.Filtr.Contracts.Entities;

namespace Sony.Filtr.Contracts
{
    public class FiltrMapper : IMapper
    {
        public TableInfo GetTableInfo(Type pocoType)
        {
            return TableInfo.FromPoco(pocoType);
        }

        public ColumnInfo GetColumnInfo(PropertyInfo pocoProperty)
        {
            return ColumnInfo.FromProperty(pocoProperty);
        }

        public Func<object, object> GetFromDbConverter(PropertyInfo targetProperty, Type sourceType)
        {
            if (targetProperty.PropertyType == typeof(CultureInfo))
            {
                return x => new CultureInfo((string)x);
            }
            if (targetProperty.PropertyType == typeof(List<string>))
            {
                return x =>
                {
                    var value = (string)x;
                    if (!string.IsNullOrWhiteSpace(value))
                    {
                        return value.Split(',').ToList();
                    }
                    return null;
                };
            }
            if (targetProperty.PropertyType == typeof(object))// && Attribute.IsDefined(targetProperty, typeof(DynamicAttribute)))
            {
                return x =>
                {
                    var stringValue = (string)x;
                    if (!string.IsNullOrWhiteSpace(stringValue))
                    {
                        try
                        {
                            return JsonConvert.DeserializeObject(stringValue);
                        }
                        catch (Exception) //TODO: Catch specific exception
                        {
                            return null;
                        }
                    }

                    return null;
                };
            }
            if (targetProperty.PropertyType == typeof (SpotifyLink))
            {
                return x => new SpotifyLink((string) x);
            }
            return null;
        }

        public Func<object, object> GetToDbConverter(PropertyInfo sourceProperty)
        {
            if (sourceProperty.PropertyType == typeof(CultureInfo))
            {
                return x => ((CultureInfo) x).Name;
            }
            if (sourceProperty.PropertyType == typeof(List<string>))
            {
                return x =>
                {
                    var value = (List<string>) x;
                    if (value != null)
                    {
                        return string.Join(",", value);
                    }
                    return null;
                };
            }
            return null;
        }
    }
}