using System;

using System.Linq.Expressions;

using System.Threading.Tasks;

using SharpRepository.Repository.Caching;

// TODO: I want to use the ICanGet<> trait so that they aren't defined in 2 places but I can't because the GetAll is in IRepositoryQueryable and not in here, but it needs to be in ICanGet

namespace SharpRepository.Repository

{

/// <summary>

/// Repository that acesses <typeparamref name="T"/> entities and has a primary key of type <typeparamref name="TKey"/>

/// </summary>

/// <typeparam name="T">The entity type that the repository acts on.</typeparam>

/// <typeparam name="TKey">The type of the primary key.</typeparam>

public interface IRepository<T, TKey> : IRepositoryBase<T>, IRepositoryQueryable<T> where T : class

{

IRepositoryConventions Conventions { get; set; }

/// <summary>

/// Gets the specified entity of type <typeparamref name="T"/> from the repository by the primary key.

/// </summary>

/// <param name="key">The primary key.</param>

/// <returns>The entity that matches on the primary key</returns>

T Get(TKey key);

/// <summary>

/// Gets the specified entity of type <typeparamref name="T"/> from the repository by the primary key and maps it to the result of type <typeparamref name="TResult"/>.

/// </summary>

/// <typeparam name="TResult">The type of the result.</typeparam>

/// <param name="key">The primary key.</param>

/// <param name="selector">The mapping selector that returns the result type.</param>

/// <returns>The mapped entity based on the selector that matches on the primary key.</returns>

TResult Get<TResult>(TKey key, Expression<Func<T, TResult>> selector);

/// <summary>

/// Returns true if the specified entity of type <typeparamref name="T"/> from the repository by the primary key exists

/// </summary>

/// <param name="key">The primary key.</param>

/// <returns>True if the entity exists, false if it does not</returns>

bool Exists(TKey key);

/// <summary>

/// Returns true if the specified entity of type <typeparamref name="T"/> from the repository by the primary key exists

/// </summary>

/// <param name="key">The primary key.</param>

/// <param name="entity">The entity that was found</param>

/// <returns>True if the entity exists, false if it does not</returns>

bool TryGet(TKey key, out T entity);

/// <summary>

/// Returns true if the specified entity of type <typeparamref name="T"/> from the repository by the primary key exists

/// </summary>

/// <param name="key">The primary key.</param>

/// <param name="selector">The mapping selector that returns the result type.</param>

/// <param name="entity">The entity that was found</param>

/// <returns>True if the entity exists, false if it does not</returns>

bool TryGet<TResult>(TKey key, Expression<Func<T, TResult>> selector, out TResult entity);

/// <summary>

/// Deletes the specified entity by the primary key.

/// </summary>

/// <param name="key">The primary key.</param>

void Delete(TKey key);

ICachingStrategy<T, TKey> CachingStrategy { get; set; }

bool CachingEnabled { get; set; }

bool CacheUsed { get; }

#if !NET40

Task<T> GetAsync(TKey key);

Task<TResult> GetAsync<TResult>(TKey key, Expression<Func<T, TResult>> selector);

Task DeleteAsync(TKey key);

#endif

}

/// <summary>

/// Defaults to int as the Primary Key

/// </summary>

/// <typeparam name="T"></typeparam>

public interface IRepository<T> : IRepository<T, int> where T : class

{

}

}