using System;
using System.Linq;
using System.Linq.Expressions;
using MongoDB.Driver;
using MongoDB.Driver.Linq;
using MongoDbGenericRepository.Models;

namespace MongoDbGenericRepository.DataAccess.Base
{
    /// <summary>
    /// A interface for accessing the Database and its Collections.
    /// </summary>
    public interface IDataAccessBase
    {
        /// <summary>
        /// Gets a IMongoQueryable for a potentially partitioned document type and a filter.
        /// </summary>
        /// <typeparam name="TDocument">The document type.</typeparam>
        /// <typeparam name="TKey">The type of the primary key.</typeparam>
        /// <param name="filter">The filter definition.</param>
        /// <param name="partitionKey">The collection partition key.</param>
        /// <returns></returns>
        IQueryable<TDocument> GetQuery<TDocument, TKey>(Expression<Func<TDocument, bool>> filter, string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>;

        /// <summary>
        /// Gets a collections for a potentially partitioned document type.
        /// </summary>
        /// <typeparam name="TDocument">The document type.</typeparam>
        /// <typeparam name="TKey">The type of the primary key.</typeparam>
        /// <param name="document">The document.</param>
        /// <returns></returns>
        IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(TDocument document)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>;

        /// <summary>
        /// Gets a collections for a potentially partitioned document type.
        /// </summary>
        /// <typeparam name="TDocument">The document type.</typeparam>
        /// <typeparam name="TKey">The type of the primary key.</typeparam>
        /// <param name="partitionKey">The collection partition key.</param>
        /// <returns></returns>
        IMongoCollection<TDocument> HandlePartitioned<TDocument, TKey>(string partitionKey)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>;

        /// <summary>
        /// Gets a collections for the type TDocument with a partition key.
        /// </summary>
        /// <typeparam name="TDocument">The document type.</typeparam>
        /// <typeparam name="TKey">The type of the primary key.</typeparam>
        /// <param name="partitionKey">The collection partition key.</param>
        /// <returns></returns>
        IMongoCollection<TDocument> GetCollection<TDocument, TKey>(string partitionKey = null)
            where TDocument : IDocument<TKey>
            where TKey : IEquatable<TKey>;
    }
}