using System;
using System.Collections.Generic;
using System.Linq;
using LiteDB;
using skydiveLogs_api.Domain;
using skydiveLogs_api.DomainService.Repositories;
using skydiveLogs_api.Infrastructure.Interfaces;

namespace skydiveLogs_api.Infrastructure
{
    /// <summary>
    /// Repository class for managing aircraft data in the database.
    /// Provides operations to add, retrieve, count, and update aircraft records.
    /// </summary>
    public class AircraftRepository : IAircraftRepository
    {
        #region Public Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="AircraftRepository"/> class.
        /// </summary>
        /// <param name="dataProvider">The data provider used for database access operations</param>
        /// <remarks>
        /// This constructor initializes the repository with a reference to the data provider
        /// and sets up the collection for aircraft data operations.
        /// </remarks>
        public AircraftRepository(IDataProvider dataProvider)
        {
            _dataProvider = dataProvider;
            _col = _dataProvider.CollOfAircraft;
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Adds a new aircraft to the database.
        /// </summary>
        /// <param name="newAircraft">The aircraft instance to insert into the database</param>
        /// <returns>The number of rows affected. Returns 0 if the insert operation failed.</returns>
        /// <remarks>
        /// Attempts to insert the new aircraft into the database using LiteDB.
        /// If an exception occurs during insertion, the method returns 0.
        /// </remarks>
        public int Add(Aircraft newAircraft)
        {
            int result;

            try
            {
                var tmp = _col.Insert(newAircraft);
                result = tmp.AsInt32;
            }
            catch
            {
                result = 0;
            }

            return result;
        }

        /// <summary>
        /// Retrieves all aircraft from the database.
        /// </summary>
        /// <returns>An enumerable collection containing all aircraft instances stored in the database</returns>
        /// <remarks>
        /// Queries the aircraft collection and retrieves all records,
        /// then converts the result to a List for enumeration.
        /// </remarks>
        public IEnumerable<Aircraft> GetAll()
        {
            return _col.FindAll().ToList();
        }

        /// <summary>
        /// Retrieves an aircraft by its unique identifier.
        /// </summary>
        /// <param name="id">The unique identifier of the aircraft to retrieve</param>
        /// <returns>The aircraft instance if found, otherwise null</returns>
        /// <remarks>
        /// Searches the aircraft collection for a record with the specified ID
        /// and returns the found aircraft or null if no match exists.
        /// </remarks>
        public Aircraft GetById(int id)
        {
            return _col.FindById(new BsonValue(id));
        }

        /// <summary>
        /// Gets the total count of aircraft in the database.
        /// </summary>
        /// <returns>The total number of aircraft stored in the database</returns>
        /// <remarks>
        /// This method is not currently implemented and throws
        /// a <see cref="NotImplementedException"/> when called.
        /// </remarks>
        public int GetCount()
        {
            throw new NotImplementedException();
        }

        /// <summary>
        /// Updates an existing aircraft in the database.
        /// </summary>
        /// <param name="aircraft">The aircraft instance containing the updated data</param>
        /// <returns><see langword="true"/> if the update was successful; otherwise, <see langword="false"/></returns>
        /// <remarks>
        /// Updates the aircraft record in the database with the provided aircraft instance.
        /// The method returns the result of the underlying LiteDB update operation.
        /// </remarks>
        public bool Update(Aircraft aircraft)
        {
            return _col.Update(aircraft);
        }

        #endregion Public Methods

        #region Private Fields

        /// <summary>
        /// The LiteDB collection for aircraft records.
        /// </summary>
        private readonly ILiteCollection<Aircraft> _col;

        /// <summary>
        /// The data provider used for database access operations.
        /// </summary>
        private readonly IDataProvider _dataProvider;

        #endregion Private Fields
    }
}