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

namespace skydiveLogs_api.Infrastructure
{
    public class JumpRepository : IJumpRepository
    {
        #region Public Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="JumpRepository"/> class
        /// </summary>
        /// <param name="dataProvider">The data provider to use for data access</param>
        public JumpRepository(IDataProvider dataProvider)
        {
            _dataProvider = dataProvider;
            _col = _dataProvider.CollOfJump;
        }

        #endregion Public Constructors

        #region Public Methods

        /// <summary>
        /// Adds a new jump to the database
        /// </summary>
        /// <param name="newJump">The jump instance to add</param>
        /// <returns>The number of rows affected (0 if insert failed)</returns>
        public int Add(Jump newJump)
        {
            int result;

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

            return result;
        }

        /// <summary>
        /// Deletes a jump by its unique identifier
        /// </summary>
        /// <param name="id">The unique identifier of the jump to delete</param>
        /// <returns>True if the deletion was successful, false otherwise</returns>
        public bool DeleteById(int id)
        {
            return _col.Delete(new BsonValue(id));
        }

        /// <summary>
        /// Retrieves all jumps for a specific user
        /// </summary>
        /// <param name="user">The user whose jumps to retrieve</param>
        /// <returns>A collection of jump instances belonging to the user</returns>
        public IEnumerable<Jump> GetAll(User user)
        {
            return _col.Include(x => x.Aircraft)
                       .Include(x => x.DropZone)
                       .Include(x => x.Gear)
                       .Include(x => x.JumpType)
                       .Find(j => j.User.Id == user.Id);
        }

        /// <summary>
        /// Retrieves all jumps from the database
        /// </summary>
        /// <returns>A collection of all jump instances</returns>
        public IEnumerable<Jump> GetAll()
        {
            throw new System.NotImplementedException();
        }

        /// <summary>
        /// Retrieves a range of jumps for a specific user
        /// </summary>
        /// <param name="user">The user whose jumps to retrieve</param>
        /// <param name="beginIndex">The starting index</param>
        /// <param name="endIndex">The ending index</param>
        /// <returns>A collection of jump instances</returns>
        public IEnumerable<Jump> GetBetweenIndex(User user, int beginIndex, int endIndex)
        {
            return _col.Include(x => x.Aircraft)
                       .Include(x => x.DropZone)
                       .Include(x => x.Gear)
                       .Include(x => x.JumpType)
                       .Query()
                       .OrderByDescending(j => j.JumpDate)
                       .Where(j => j.User.Id == user.Id)
                       .Limit(endIndex - beginIndex)
                       .Offset(beginIndex)
                       .ToList();
        }

        /// <summary>
        /// Retrieves a jump by its unique identifier
        /// </summary>
        /// <param name="id">The unique identifier of the jump</param>
        /// <returns>The jump instance or null if not found</returns>
        public Jump GetById(int id)
        {
            return _col.FindById(new BsonValue(id));
        }

        /// <summary>
        /// Gets the total count of jumps for a specific user
        /// </summary>
        /// <param name="user">The user whose jumps to count</param>
        /// <returns>The total number of jumps</returns>
        public int GetCount(User user)
        {
            return _col.Count(j => j.User.Id == user.Id);
        }

        /// <summary>
        /// Gets the total count of jumps in the database
        /// </summary>
        /// <returns>The total number of jumps</returns>
        public int GetCount()
        {
            throw new System.NotImplementedException();
        }

        /// <summary>
        /// Updates an existing jump in the database
        /// </summary>
        /// <param name="updatedJump">The jump instance to update</param>
        /// <returns>True if the update was successful, false otherwise</returns>
        public bool Update(Jump updatedJump)
        {
            return _col.Update(updatedJump);
        }

        #endregion Public Methods

        #region Private Fields

        private readonly ILiteCollection<Jump> _col;
        private readonly IDataProvider _dataProvider;

        #endregion Private Fields
    }
}