using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using Tanshu.Accounts.Contracts;
using Tanshu.Data.DAO;
using Tanshu.Accounts.DAOFactory;

namespace Tanshu.Accounts.SqlDAO
{
    public class CustomerDAO : BaseDAO, ICustomerDAO
    {
        public CustomerDAO(IConnectionDAO connection)
            : base(connection)
        { }

        public void Insert(CustomerBO customer)
        {
            using (SqlCommand cmd = new SqlCommand(@"
SET @CustomerID = NEWID();
SELECT @Code = ISNULL(MAX(Code), 0) + 1 FROM Customers;
INSERT INTO Customers (CustomerID, Code, Name, LedgerID, Address, Important, Phone, Remarks) VALUES (@CustomerID, @Code, @Name, @LedgerID, @Address, @Important, @Phone, @Remarks)"))
            {
                cmd.Parameters.Add("@CustomerID", System.Data.SqlDbType.UniqueIdentifier);
                cmd.Parameters["@CustomerID"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.Add("@Code", System.Data.SqlDbType.Int);
                cmd.Parameters["@Code"].Direction = System.Data.ParameterDirection.Output;

                cmd.Parameters.AddWithValue("@Name", customer.Name);
                cmd.Parameters.AddWithValue("@LedgerID", customer.LedgerID);
                cmd.Parameters.AddWithValue("@Address", customer.Address);
                cmd.Parameters.AddWithValue("@Important", customer.Important);
                cmd.Parameters.AddWithValue("@Phone", customer.Phone);
                cmd.Parameters.AddWithValue("@Remarks", customer.Remarks);
                connection.ExecuteNonQuery(cmd);
                customer.CustomerID = (Guid)cmd.Parameters["@CustomerID"].Value;
                customer.Code = (int)cmd.Parameters["@Code"].Value;
            }
        }
        public void Update(CustomerBO customer)
        {
            using (SqlCommand cmd = new SqlCommand(@"UPDATE Customers SET Code = @Code, Name = @Name, LedgerID = @LedgerID, Address = @Address, Important = @Important, Phone = @Phone, Remarks = @Remarks WHERE CustomerID = @CustomerID"))
            {
                cmd.Parameters.AddWithValue("@CustomerID", customer.CustomerID);
                cmd.Parameters.AddWithValue("@Code", customer.Code);
                cmd.Parameters.AddWithValue("@Name", customer.Name);
                cmd.Parameters.AddWithValue("@LedgerID", customer.LedgerID);
                cmd.Parameters.AddWithValue("@Address", customer.Address);
                cmd.Parameters.AddWithValue("@Important", customer.Important);
                cmd.Parameters.AddWithValue("@Phone", customer.Phone);
                cmd.Parameters.AddWithValue("@Remarks", customer.Remarks);
                connection.ExecuteNonQuery(cmd);
            }
        }
        public void Delete(Guid customerID)
        {
            using (SqlCommand cmd = new SqlCommand("DELETE FROM Customers WHERE CustomerID = @CustomerID"))
            {
                cmd.Parameters.AddWithValue("@CustomerID", customerID);
                connection.ExecuteNonQuery(cmd);
            }
        }

        public CustomerBO GetCustomer(Guid customerID)
        {
            SqlCommand cmd = new SqlCommand("SELECT * FROM Customers Where CustomerID=@CustomerID ");
            cmd.Parameters.AddWithValue("@CustomerID", customerID);
            return BusinessObjectDAO<CustomerBO>.GetBusinessObject(connection.ExecuteReader(cmd));
        }
        public List<CustomerBO> GetFilteredCustomers(Dictionary<string, string> filter)
        {
            string query = "";
            string[] filters = filter["Universal"].Split(' ');
            if ((filters != null) && (filters.Length > 0))
            {
                query = "SELECT CustomerID, Code, Name, LedgerID, Address, Important, Phone, Remarks FROM Customers WHERE ";
                foreach (string fil in filters)
                {
                    query += string.Format("(Name LIKE '%{0}%' OR Address LIKE '%{0}%' OR Phone LIKE '%{0}%' OR Remarks LIKE '%{0}%') AND ", fil);
                }
                query = query.Substring(0, query.Length - 5);
            }
            else
            {
                query = "SELECT CustomerID, Code, Name, LedgerID, Address, Important, Phone, Remarks FROM Customers";
            }
            return BusinessObjectDAO<CustomerBO>.GetBusinessObjects(connection.ExecuteReader(query));
        }
        public List<LedgerBO> GetCustomerLedgers()
        {
            return BusinessObjectDAO<LedgerBO>.GetBusinessObjects(connection.ExecuteReader("SELECT * FROM Ledgers WHERE Type IN ('B', 'D') ORDER BY Name"));
        }
        public List<CustomerBO> GetCustomers()
        {
            Dictionary<string, string> filter = new Dictionary<string, string>();
            filter.Add("Universal", "");
            return GetFilteredCustomers(filter);
        }
        public List<CustomerBO> GetCustomers(Guid customerID)
        {
            string query = "SELECT CustomerID, Code, Name, LedgerID, Address, Important, Phone, Remarks FROM Customers WHERE CustomerID = @CustomerID";
            using (SqlCommand cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@CustomerID", customerID);
                return BusinessObjectDAO<CustomerBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
            }

        }
    }
}