using System;
using System.Linq.Expressions;
using System.Text.RegularExpressions;
using System.Windows.Forms;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Entities.Auth;
using Tanshu.Accounts.Helpers;
using Tanshu.Accounts.Management;
using Tanshu.Accounts.PointOfSale.Sales;
using Tanshu.Accounts.Repository;
using Tanshu.Common;
using Tanshu.Common.KeyboardControl;

namespace Tanshu.Accounts.PointOfSale
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            SessionManager.Initialize();
            //new SchemaExport(SessionManager.Configuration).Create(false, true);
            InitializeComponent();
            Text = "Point of Sale: Login (" + Environment.MachineName + ")";
        }

        private User form_userEvent(object sender, UserEventArgs e)
        {
            var user = e.User;

            if (user == null)
                using (var form = new UserForm(null))
                    form.ShowDialog();
            else
                using (var form = new UserForm(user.UserID))
                    form.ShowDialog();

            e.Handled = true;
            return new User();
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            LoginUser(new KeyboardLogin());
        }

        private void btnSale_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Sales"))
                using (var frmSale = new SalesForm(new BillController(null)))
                {
                    frmSale.ShowDialog();
                    Cache.Invalidate();
                }
        }

        private void btnProduct_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Products"))
                using (var frm = new ProductListForm())
                    frm.ShowDialog();
        }

        private void btnProductGroup_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Products"))
                using (var frm = new ProductGroupListForm())
                    frm.ShowDialog();
        }

        private void btnCustomer_Click(object sender, EventArgs e)
        {
            using (var frm = new CustomersForm(null, ""))
                frm.ShowDialog();
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void btnCreateUser_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Roles"))
                using (var bi = new UserBI())
                {
                    using (var form = new SelectUser(bi.GetFilteredUsers, true))
                    {
                        form.UserEvent += form_userEvent;
                        form.ShowDialog();
                    }
                }
        }

        private void btnUserRoles_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Roles"))
                using (var frm = new AssignUserGroups())
                    frm.ShowDialog();
        }

        private void btnChangePassword_Click(object sender, EventArgs e)
        {
            using (var frm = new ChangePassword(new KeyboardControl()))
                frm.ShowDialog();
        }

        private void btnCashierCheckout_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Cashier Checkout"))
                using (var frm = new CashierCheckoutForm())
                    frm.ShowDialog();
        }

        private void btnSaleAnalysis_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Sales Analysis"))
                using (var frm = new frmSaleAnalysisForm())
                    frm.ShowDialog();
        }

        private void btnSaleDetail_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Sales Detail"))
                using (var frm = new FrmSaleDetail())
                    frm.ShowDialog();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
#if (DEBUG)
            MessageBox.Show("This software does not print kots!!!", "Debug Mode", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
#endif
            CheckMachine();
            CheckRoles();
        }

        private void CheckMachine()
        {
            if (string.IsNullOrEmpty(Cache.Location))
            {
                MessageBox.Show("No Machine Location");
                using (var frm = new MachineEditForm(Environment.MachineName))
                    frm.ShowDialog();
                if (string.IsNullOrEmpty(Cache.Location))
                {
                    MessageBox.Show("Machine Location not set");
                    Close();
                }
            }
        }
        private void CheckRoles()
        {
            btnSale.Visible = Session.IsAllowed("Sales");

            btnProduct.Visible = Session.IsAllowed("Products");
            btnProductGroup.Visible = Session.IsAllowed("Products");
            btnModifiers.Visible = Session.IsAllowed("Modifiers");
            btnReorderTables.Visible = Session.IsAllowed("Tables");
            btnMachines.Visible = Session.IsAllowed("Machines");

            btnOpenBill.Visible = Session.IsAllowed("Open Bill");

            btnCustomer.Visible = Session.IsAllowed("Customers");

            btnCreateUser.Visible = Session.IsAllowed("Users");
            btnUserRoles.Visible = Session.IsAllowed("Users");

            btnGroupRoles.Visible = Session.IsAllowed("Roles");

            btnCashierCheckout.Visible = Session.IsAllowed("Cashier Checkout");
            btnSaleAnalysis.Visible = Session.IsAllowed("Sales Analysis");
            btnTaxAnalysis.Visible = Session.IsAllowed("Tax Analysis");
            btnSaleDetail.Visible = Session.IsAllowed("Sales Detail");

            btnBillDetails.Visible = Session.IsAllowed("Bill Details");
            btnVoidOrReprints.Visible = Session.IsAllowed("Void or Reprinted Bill Report");
            btnDiscountReport.Visible = Session.IsAllowed("Discount Report");

            btnChangePassword.Visible = Session.IsAuthenticated;
#if (DEBUG)
            btnManagement.Visible = true;
#else
            btnManagement.Visible = false;
#endif
        }

        private void btnGroupRoles_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Roles"))
                using (var frm = new AssignGroupRoles())
                    frm.ShowDialog();
        }

        private void btnSwipeLogin_Click(object sender, EventArgs e)
        {
            LoginUser(new MsrLogin());
        }

        private void LoginUser(ILogin login)
        {
            if (!Session.IsAuthenticated)
            {
                if (login.LoginUser())
                {
                    Text = "Point of Sale: " + Session.User.Name + " (" + Environment.MachineName + ")";
                    btnLogin.Text = "Logout";
                    btnSwipeLogin.Visible = false;
                }
            }
            else
            {
                login.LogoutUser();
                Text = "Point of Sale: Login (" + Environment.MachineName + ")";
                btnLogin.Text = "Login";
                btnSwipeLogin.Visible = true;
            }
            CheckRoles();
        }

        private void btnOpenBill_Click(object sender, EventArgs e)
        {
            if (!Session.IsAllowed("Open Bill"))
                return;
            var result = InputBox.Show("Bill Number", "0", InputBox_Validating);
            if (!result.OK)
                return;

            Expression<Func<Voucher, bool>> query;
            int billID;
            if (Regex.IsMatch(result.Text, @"^\d{2,}-\d{4}$"))
            {
                billID = int.Parse(result.Text.Replace("-", ""));
                query = x => x.BillID == billID && (x.VoucherType == VoucherType.Regular || x.VoucherType == VoucherType.TakeAway);
            }
            else if (Regex.IsMatch(result.Text, @"^NC-\d+$"))
            {
                billID = int.Parse(result.Text.Replace("NC-", ""));
                query = x => x.BillID == billID && x.VoucherType == VoucherType.NoCharge;
            }
            else if (Regex.IsMatch(result.Text, @"^ST-\d+$"))
            {
                billID = int.Parse(result.Text.Replace("ST-", ""));
                query = x => x.BillID == billID && x.VoucherType == VoucherType.Staff;
            }
            else
                return;

            Voucher voucher;
            using (var bi = new VoucherBI())
                voucher = bi.Get(query);
            if (voucher == null)
                return;
            if (Session.IsAllowed("Sales"))
                using (var frmSale = new SalesForm(new BillController(voucher.VoucherID)))
                    frmSale.ShowDialog();
        }

        private static void InputBox_Validating(object sender, InputBoxValidatingArgs e)
        {
            if (Regex.IsMatch(e.Text, @"^\d+-\d\d\d\d")) return;
            e.Cancel = true;
            e.Message = "Bill No should be in format ##-####";
        }

        private void btnBillDetails_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Bill Details"))
                using (var frm = new BillDetailsForm())
                    frm.ShowDialog();
        }

        private void btnVoidOrReprints_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Void or Reprinted Bill Report"))
                using (var frm = new VoidReprintedForm())
                    frm.ShowDialog();
        }

        private void btnDiscountReport_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Discount Report"))
                using (var frm = new DiscountReportForm())
                    frm.ShowDialog();

        }

        private void btnManagement_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Owner"))
                using (var frm = new ManagementForm())
                    frm.ShowDialog();
        }

        private void btnReorderTables_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Tables"))
                using (var frm = new ReorderTableForm())
                {
                    frm.ShowDialog();
                }
        }

        private void btnModifiers_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Modifiers"))
                using (var frm = new ModifierListForm())
                {
                    frm.ShowDialog();
                }
        }

        private void btnMachines_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Machines"))
                using (var frm = new MachineListForm())
                {
                    frm.ShowDialog();
                }
        }

        private void btnTaxAnalysis_Click(object sender, EventArgs e)
        {
            if (Session.IsAllowed("Tax Analysis"))
                using (var frm = new frmTaxAnalysisForm())
                    frm.ShowDialog();
        }
    }
}