using System.Collections.Generic;
using System.Linq;

using skydiveLogs_api.Business.Interface;
using skydiveLogs_api.Data.Interface;
using skydiveLogs_api.Model;


namespace skydiveLogs_api.Business
{
    public class StatsService : IStatsService
    {
        public StatsService(IJumpRepository jumpRepository)
        {
            _jumpRepository = jumpRepository;
        }

        public IEnumerable<Statistic> GetStatsByAircraft()
        {
            var allJumps = _jumpRepository.GetAll();

            return allJumps.GroupBy(j => j.Aircraft.Id,
                                    j => j,
                                    (groupby, jumps) => new Statistic
                                    {
                                        Label = groupby.ToString(),
                                        Nb = jumps.Count()
                                    })
                            .ToList();
        }

        public IEnumerable<Statistic> GetStatsByDz()
        {
            var allJumps = _jumpRepository.GetAll();

            return allJumps.GroupBy(j => j.DropZone.Id,
                                    j => j,
                                    (groupby, jumps) => new Statistic
                                    {
                                        Label = groupby.ToString(),
                                        Nb = jumps.Count()
                                    })
                            .ToList();
        }

        public IEnumerable<Statistic> GetStatsByJumpType()
        {
            var allJumps = _jumpRepository.GetAll();

            return allJumps.GroupBy(j => j.JumpType.Id,
                                    j => j,
                                    (groupby, jumps) => new Statistic
                                    {
                                        Label = groupby.ToString(),
                                        Nb = jumps.Count()
                                    })
                            .ToList();
        }

        public IEnumerable<Statistic> GetStatsByGear()
        {
            var allJumps = _jumpRepository.GetAll();

            return allJumps.GroupBy(j => j.Gear.Id,
                                    j => j,
                                    (groupby, jumps) => new Statistic
                                    {
                                        Label = groupby.ToString(),
                                        Nb = jumps.Count()
                                    })
                            .ToList();
        }

        public IEnumerable<Statistic> GetStatsByYear()
        {
            var allJumps = _jumpRepository.GetAll();

            return allJumps.GroupBy(j => j.JumpDate.Year,
                                    j => j,
                                    (groupby, jumps) => new Statistic
                                    {
                                        Label = groupby.ToString(),
                                        Nb = jumps.Count()
                                    })
                            .ToList();
        }

        private readonly IJumpRepository _jumpRepository;
    }
}