using System;
using System.Collections.Generic;
using System.Data.OleDb;
using unesMdb.model;

namespace unesMdb
{
    public static class DbUtils
    {
        public static string ConnectionString;

        public static List<UserData> CollectUsers()
        {
            List<UserData> result = new List<UserData>();
            string sql = "select * from heti";
            using (OleDbConnection connection = new OleDbConnection(ConnectionString))
            {
                OleDbCommand command = new OleDbCommand(sql, connection);
                try
                {
                    connection.Open();
                    using (OleDbDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            result.Add(new UserData
                            {
                                Id = reader["Henu"].ToString(),
                                Name = reader["Heni"].ToString(),
                                Pin = reader["Hetu"].ToString()
                            });
                        }
                    }
                }
                catch (Exception x)
                {
                    Console.WriteLine(x.Message);
                }
            }
            return result;
        }

        public static List<FlatData> CollectFlats(List<UserData> users)
        {
            List<FlatData> result = new List<FlatData>();
            string sql = "select * from huos";
            using (OleDbConnection connection = new OleDbConnection(ConnectionString))
            {
                OleDbCommand command = new OleDbCommand(sql, connection);
                try
                {
                    connection.Open();
                    using (OleDbDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            var user = users.Find(u => u.Id.Equals(reader["Henu"].ToString()));
                            var existing = result.Find(f => f.Title.Equals(reader["Huno"].ToString()));
                            if (existing != null)
                            {
                                if (user != null)
                                {
                                    existing.Users.Add(user);
                                }
                            }
                            else
                            {
                                var flat = new FlatData { Id = reader["Hutu"].ToString(), Title = reader["Huno"].ToString() };
                                if (user != null)
                                {
                                    flat.Users.Add(user);
                                }
                                result.Add(flat);
                            }
                        }
                    }
                }
                catch (Exception x)
                {
                    Console.WriteLine(x.Message);
                }
            }
            return result;
        }

        public static void CollectLinks(List<UserData> users)
        {
            List<FlatData> result = new List<FlatData>();
            string sql = "select * from vuko";
            using (OleDbConnection connection = new OleDbConnection(ConnectionString))
            {
                OleDbCommand command = new OleDbCommand(sql, connection);
                try
                {
                    connection.Open();
                    using (OleDbDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            var user = users.Find(u => u.Id.Equals(reader["Henu"].ToString()));
                            if (user == null)
                            {
                                continue;
                            }
                            user.FeeId = reader["Konu"].ToString();
                        }
                    }
                }
                catch (Exception x)
                {
                    Console.WriteLine(x.Message);
                }
            }
        }

        public static List<UserData> CollectFees(List<UserData> users)
        {
            List<UserData> result = new List<UserData>();
            string sql = "select * from vuri";
            using (OleDbConnection connection = new OleDbConnection(ConnectionString))
            {
                OleDbCommand command = new OleDbCommand(sql, connection);
                try
                {
                    connection.Open();
                    using (OleDbDataReader reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            var user = users.Find(u => reader["Konu"].ToString().Equals(u.FeeId));
                            if (user == null)
                            {
                                continue;
                            }

                            var fee = new FeeData { Name = reader["Lani"].ToString(), Amount = reader["Masu"].ToString() };
                            user.Fees.Add(fee);
                        }
                    }
                }
                catch (Exception x)
                {
                    Console.WriteLine(x.Message);
                }
            }
            return result;
        }
    }
}