using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Collections.Generic;
using Oqtane.Modules;

namespace SZUAbsolventenverein.Module.HallOfFame.Repository
{
    public interface IHallOfFameRepository
    {
        IEnumerable<Models.HallOfFame> GetHallOfFames(int ModuleId);
        Models.HallOfFame GetHallOfFame(int HallOfFameId);
        Models.HallOfFame GetHallOfFame(int HallOfFameId, bool tracking);
        Models.HallOfFame AddHallOfFame(Models.HallOfFame HallOfFame);
        Models.HallOfFame UpdateHallOfFame(Models.HallOfFame HallOfFame);
        void DeleteHallOfFame(int HallOfFameId);

        IEnumerable<Models.HallOfFameReport> GetHallOfFameReports(int HallOfFameId);
        Models.HallOfFameReport GetHallOfFameReport(int HallOfFameReportId);
        Models.HallOfFameReport AddHallOfFameReport(Models.HallOfFameReport HallOfFameReport);
        void DeleteHallOfFameReport(int HallOfFameReportId);
    }

    public class HallOfFameRepository : IHallOfFameRepository, ITransientService
    {
        private readonly IDbContextFactory<HallOfFameContext> _factory;

        public HallOfFameRepository(IDbContextFactory<HallOfFameContext> factory)
        {
            _factory = factory;
        }

        public IEnumerable<Models.HallOfFame> GetHallOfFames(int ModuleId)
        {
            using var db = _factory.CreateDbContext();
            var items = db.HallOfFame.Where(item => item.ModuleId == ModuleId)
                .OrderByDescending(item => item.CreatedOn)
                .ToList();
            foreach (var item in items)
            {
                item.Description = item.Description?.Replace("\t", " ");
            }
            return items;
        }

        public Models.HallOfFame GetHallOfFame(int HallOfFameId)
        {
            return GetHallOfFame(HallOfFameId, true);
        }

        public Models.HallOfFame GetHallOfFame(int HallOfFameId, bool tracking)
        {
            using var db = _factory.CreateDbContext();
            Models.HallOfFame item;
            if (tracking)
            {
                item = db.HallOfFame.Find(HallOfFameId);
            }
            else
            {
                item = db.HallOfFame.AsNoTracking().FirstOrDefault(i => i.HallOfFameId == HallOfFameId);
            }
            if (item != null)
            {
                item.Description = item.Description?.Replace("\t", " ");
            }
            return item;
        }

        public Models.HallOfFame AddHallOfFame(Models.HallOfFame HallOfFame)
        {
            using var db = _factory.CreateDbContext();
            HallOfFame.Description = HallOfFame.Description?.Replace("\t", " ");
            db.HallOfFame.Add(HallOfFame);
            db.SaveChanges();
            return HallOfFame;
        }

        public Models.HallOfFame UpdateHallOfFame(Models.HallOfFame HallOfFame)
        {
            using var db = _factory.CreateDbContext();
            HallOfFame.Description = HallOfFame.Description?.Replace("\t", " ");
            db.Entry(HallOfFame).State = EntityState.Modified;
            db.SaveChanges();
            return HallOfFame;
        }

        public void DeleteHallOfFame(int HallOfFameId)
        {
            // First transaction: Delete all associated reports
            using (var db = _factory.CreateDbContext())
            {
                var reports = db.HallOfFameReport.Where(item => item.HallOfFameId == HallOfFameId).ToList();
                if (reports.Any())
                {
                    db.HallOfFameReport.RemoveRange(reports);
                    db.SaveChanges();
                }
            }

            // Second transaction: Delete the HallOfFame entry itself
            using (var db = _factory.CreateDbContext())
            {
                var hallOfFame = db.HallOfFame.Find(HallOfFameId);
                if (hallOfFame != null)
                {
                    db.HallOfFame.Remove(hallOfFame);
                    db.SaveChanges();
                }
            }
        }

        public IEnumerable<Models.HallOfFameReport> GetHallOfFameReports(int HallOfFameId)
        {
            using var db = _factory.CreateDbContext();
            return db.HallOfFameReport.Where(item => item.HallOfFameId == HallOfFameId)
                .OrderByDescending(item => item.CreatedOn)
                .ToList();
        }

        public Models.HallOfFameReport GetHallOfFameReport(int HallOfFameReportId)
        {
            using var db = _factory.CreateDbContext();
            return db.HallOfFameReport.Find(HallOfFameReportId);
        }

        public Models.HallOfFameReport AddHallOfFameReport(Models.HallOfFameReport HallOfFameReport)
        {
            using var db = _factory.CreateDbContext();
            db.HallOfFameReport.Add(HallOfFameReport);
            db.SaveChanges();
            return HallOfFameReport;
        }

        public void DeleteHallOfFameReport(int HallOfFameReportId)
        {
            using var db = _factory.CreateDbContext();
            
            // Clear any tracked entities to avoid conflicts
            db.ChangeTracker.Clear();
            
            Models.HallOfFameReport HallOfFameReport = db.HallOfFameReport.Find(HallOfFameReportId);
            if (HallOfFameReport != null)
            {
                db.HallOfFameReport.Remove(HallOfFameReport);
                db.SaveChanges();
            }
        }
    }
}