using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using LiteDB;
using Tesses.CMS;
namespace Tesses.CMS.Providers {
public class LiteDBContentProvider : IContentProvider
{
    string dir;
    ILiteDatabase db;
    public LiteDBContentProvider(string dir)
    {
        this.dir = dir;
        db=new LiteDatabase(Path.Combine(dir,"tesses-cms.db"));
    }
    public Movie CreateMovie(string user, string movie, string properName, string description)
    {
        var userId=GetUserAccount(user).Id;
        
        Movie _movie = new Movie(){UserId = userId,Name = movie,ProperName=properName,Description = description};
        _movie.Id=Movies.Insert(_movie);
        return _movie;
    }   
     public Show CreateShow(string user, string show, string properName, string description)
    {
        var userId=GetUserAccount(user).Id;
        
        Show _show = new Show(){UserId = userId,Name = show,ProperName=properName,Description = description};
        _show.Id=Shows.Insert(_show);
        return _show;
    }   
    private ILiteCollection<UserAccount> UserAccounts => db.GetCollection<UserAccount>("users");
    private ILiteCollection<Movie> Movies => db.GetCollection<Movie>("movies");

    private ILiteCollection<Show> Shows => db.GetCollection<Show>("shows");
    private ILiteCollection<Season> Seasons => db.GetCollection<Season>("seasons");
      private ILiteCollection<Episode> Episodes => db.GetCollection<Episode>("episodes");

    private ILiteCollection<LiteDbSession> Sessions => db.GetCollection<LiteDbSession>("sessions");
    private ILiteCollection<LiteDbVerificationToken> VerificationCodes => db.GetCollection<LiteDbVerificationToken>("verificationcodes");

    public UserAccount GetFirstUser()
    {
        return GetUsers().First();
    }

    public Movie GetMovie(string user, string movie)
    {
        var userId=GetUserAccount(user).Id;
        return Movies.FindOne(e=>e.Name == movie && e.UserId == userId);
    }

    public Show GetShow(string user,string show)
    {
        var userId=GetUserAccount(user).Id;
        return Shows.FindOne(e=>e.Name == show && e.UserId == userId);
    }   
  
    public IEnumerable<Movie> GetMovies(string user)
    {
        var userId = GetUserAccount(user).Id;
        return GetMovies(userId);
    }

    public IEnumerable<Movie> GetMovies(long user)
    {
        return Movies.Find(e=>e.UserId==user);
    }

    public IEnumerable<Show> GetShows(long user)
    {
        return Shows.Find(e=>e.UserId==user);
    }

    public IEnumerable<Show> GetShows(string user)
    {
        var userId = GetUserAccount(user).Id;
        return GetShows(userId);
    }

    public UserAccount GetUserAccount(string user)
    {
        return UserAccounts.FindOne(e=>e.Username == user);
    }

    public IEnumerable<UserAccount> GetUsers()
    {
        return UserAccounts.FindAll();
    }

    public void CreateUser(CMSConfiguration configuration,string user,string properName,string email,string password)
    {
        bool isOwner = UserAccounts.Count() == 0;
        UserAccount account=new UserAccount();
        account.IsAdmin=isOwner;
        account.IsVerified = isOwner;
        account.Username = user;
        account.ProperName= properName;
        account.NewSalt();
        account.PasswordHash=account.GetPasswordHash(password);
        account.Email = email;
        UserAccounts.Insert(account);
    }

    public void UpdateMovie(Movie movie)
    {
        Movies.Update(movie);
    }
    public void UpdateShow(Show show)
    {
        Shows.Update(show);
    }


        public void UpdateUser(UserAccount account)
        {
            UserAccounts.Update(account);
        }
    
        public UserAccount GetUserById(long account)
        {
            return UserAccounts.FindById(account);
        }

        public class LiteDbSession
        {
            public long Id {get;set;}

            public string Session {get;set;}

            public long Account {get;set;}
        }

        public class LiteDbVerificationToken
        {
            public long Id {get;set;}

            public string Code {get;set;}

            public long Account {get;set;}

            public DateTime Expires {get;set;}
        }

        public void CreateSession(string session, long account)
        {
            LiteDbSession _session=new LiteDbSession();
            _session.Account = account;
            _session.Session = session;
            Sessions.Insert(_session);
        }
        public void ChangeSession(string session, long account)
        {
            var s=Sessions.FindOne(e=>e.Session == session);
            if(s!=null){s.Account = account; Sessions.Update(s);}
        }

        public void DeleteSession(string session)
        {
            var s=Sessions.FindOne(e=>e.Session == session);
            if(s!=null){ Sessions.Delete(s.Id);}
        }

        public long? GetSession(string session)
        {
            var s=Sessions.FindOne(e=>e.Session == session);
            return s != null ? s.Account : (long?)null;
        }

        public bool ContainsSession(string cookie)
        {
            return Sessions.Exists(e=>e.Session == cookie);
        }

        public void CreateVerificationCode(string code, long account)
        {
            LiteDbVerificationToken liteDbVerificationToken=new LiteDbVerificationToken();
            liteDbVerificationToken.Account = account;
            liteDbVerificationToken.Code = code;
            liteDbVerificationToken.Expires=DateTime.Now.AddDays(1);
            VerificationCodes.Insert(liteDbVerificationToken);
        }

        public void DeleteVerificationCode(string code)
        {
            var c = VerificationCodes.FindOne(e=>e.Code==code);
            if(c != null){VerificationCodes.Delete(c.Id);}
        }

        public long? GetVerificationAccount(string code)
        {
             var c = VerificationCodes.FindOne(e=>e.Code==code);
            if(c != null){
                if(DateTime.Now > c.Expires)
                VerificationCodes.Delete(c.Id);
                else
                return c.Account;
            }
            return null;
        }

        public bool ContainsVerificationCode(string code)
        {
            return VerificationCodes.Exists(e=>e.Code==code);
        }

        public int SeasonCount(string user, string show)
        {
            var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            int seasonLargest=0;
            foreach(var item in Seasons.Find(e=>e.ShowId==showId && e.UserId == userId))
            {
                if(item.SeasonNumber > seasonLargest)
                seasonLargest = item.SeasonNumber;
            }
            return seasonLargest;
        }

        public Season GetSeason(string user, string show, int season)
        {
            var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            return Seasons.FindOne(e=>e.ShowId == showId && e.UserId == userId && e.SeasonNumber == season);
        }

        public Season CreateSeason(string user, string show, int season, string properName, string description)
        {
             var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            Season _season = new Season(){UserId = userId,ShowId = showId,ProperName=properName,Description = description, SeasonNumber=season};
            _season.Id=Seasons.Insert(_season);
            return _season;
        }

        public int EpisodeCount(string user, string show, int season)
        {
             var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            int episodeLargest=0;
            foreach(var item in Episodes.Find(e=>e.ShowId==showId && e.UserId == userId && e.SeasonNumber == season))
            {
                if(item.EpisodeNumber > episodeLargest)
                episodeLargest = item.EpisodeNumber;
            }
            return episodeLargest;
        }

        public Episode GetEpisode(string user, string show, int season, int episode)
        {
             var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            return Episodes.FindOne(e=>e.ShowId == showId && e.UserId == userId && e.SeasonNumber == season && e.EpisodeNumber == episode);
    
        }

        public Episode CreateEpisode(string user, string show, int season, int episode, string episodename, string properName, string description)
        {
            var myShow = GetShow(user,show);
            var userId = myShow.UserId;
            var showId = myShow.Id;
            Episode _episode = new Episode(){UserId = userId,ShowId = showId,ProperName=properName,Description = description, SeasonNumber=season, EpisodeNumber = episode,EpisodeName=episodename};
            _episode.Id=Episodes.Insert(_episode);
            return _episode;
        }

        public void UpdateEpisode(Episode episode)
        {
            Episodes.Update(episode);
        }

        public void UpdateSeason(Season season)
        {
            Seasons.Update(season);
        }
    }
}