using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using BiskLog_Point_Of_Sale.Properties;
using BiskLog_Point_Of_Sale.Multiple_Login;
using BiskLog_Point_Of_Sale.Products_Module;
using BiskLog_Point_Of_Sale.Company_Setup;
using BiskLog_Point_Of_Sale.Classes;
using BiskLog_Point_Of_Sale.CustomControls;

namespace Point_Of_Sale_Managment
{
    public partial class StockForm : Form
    {
        SqlConnection cn;
        SqlCommand cm, cm1;
        DatabaseConn databasecon = new DatabaseConn();
        SqlDataReader dr;
        int newqty, oldqty, upqty;
        string oldval, newval = "0";
        string productCode, baseunitName, productName;
        SqlTransaction transaction;
        int total = 0;
        ProductsMainHolder mainHolder;
        List<ProductUnits> productUnits;
        string messageRestock = "";
        public StockForm(ProductsMainHolder productsMain, string code = null, string oldquantity = null, string productname = null, string baseunit = null)
        {
            InitializeComponent();
            mainHolder = productsMain;
            if (!String.IsNullOrEmpty(code))
            {
                productCode = code;
                oldval = oldquantity;
                txtRef.Text = getReference();
            }
            cn = new SqlConnection(databasecon.MyConnection());
            holding1.Left = (ClientSize.Width - holding1.Width) / 2;
            holding2.Left = (ClientSize.Width - holding2.Width) / 2;
            HandleCreated += StockForm_HandleCreated;
            if (!String.IsNullOrEmpty(baseunit))
                baseunitName = baseunit.ToUpper();
            productName = productname;

        }

        private void StockForm_HandleCreated(object sender, EventArgs e)
        {

        }

        private async void StockForm_Load(object sender, EventArgs e)
        {
            txtIN.Text = MainLogin.login_user;
            Task<int> task = new Task<int>(() =>
            {
                LoadProducts();
                //LoadStock();
                return 1;
            });
            holding1.Visible = true;
            holding2.Visible = true;
            task.Start();
            await task;
            lblSelectedProduct.Text = productName;
            holding1.Visible = false;
            holding2.Visible = false;
        }
        public int LoadProducts()
        {
            try
            {
                dataGridView1.Invoke(new Action(() =>
                {
                    int i = 0;
                    dataGridView1.Rows.Clear();
                    cn.Open();
                    cm = new SqlCommand("EXEC usp_productList_restockForm @filter = @searchkey", cn);
                    cm.AddParametersWithValues("@searchkey", txtSearch.Text);
                    dr = cm.ExecuteReader();
                    while (dr.Read())
                    {
                        i++;
                        dataGridView1.Rows.Add(i, dr[0].ToString(), dr[1].ToString(), dr[2].ToString(), dr["BaseUnit"].ToString());
                    }
                    dr.Close();
                    cn.Close();
                    dataGridView1.ClearSelection();
                }));
                return 1;
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        private async void btnSave_Click(object sender, EventArgs e)
        {
            holding2.Visible = true;
            //if (total >= 2)
            //{
            Task<int> task = new Task<int>(StockUpdate);
            task.Start();
            int result = await task;
            if (result == 1)
            {
                NoAction action = new NoAction("Operation Completed Successfully",
                    "You have successfully update the stock entry");
                action.BringToFront();
                action.ShowDialog();
                Form1.printerDialog = null;
                dataGridView1.ClearSelection();
                txtRef.Text = "";
                clearUnitControls();
            }
            else if (result == 0)
            {
                NoAction action = new NoAction("Operation failed", "There was an error while trying to update the stcok entry!!");
                action.BringToFront();
                action.ShowDialog();
                Form1.printerDialog = null;
            }
            //}
            //else
            //{
            //    NoAction action = new NoAction("Operation denied", "To be able to restock items, you must fill all entries!!");
            //    action.BringToFront();
            //    action.ShowDialog();
            //    Form1.printerDialog = null;
            //}
            holding2.Visible = false;
        }
        public int StockUpdate()
        {
            try
            {
                int newstock = getQuantity();
                string Messenger = "Are you sure you want to add "+ messageRestock+ " of " + lblSelectedProduct.Text + " to your inventory ?";
                string heading = "Adding item";
                Confirmation Confirmation = new Confirmation(message: Messenger, title: heading);
                Confirmation.BringToFront();
                Confirmation.ShowDialog();
                if (Confirmation.DialogResult == DialogResult.Yes)
                {
                    txtRef.Invoke(new Action(() =>
                    {
                        cn.Open();
                        cm = new SqlCommand("EXEC usp_restock_products @reference = @reference1,@productCode = @productCode1, @branchID = @branchID1,@quantity = @quantity1," +
                            "@stockdate = @stockdate1,@stockinby = @stockinby1,@countID = @countID1", cn);
                        cm.Parameters.AddWithValue("@reference1", txtRef.Text);
                        cm.Parameters.AddWithValue("@productCode1", productCode);
                        cm.Parameters.AddWithValue("@quantity1", newstock);
                        cm.Parameters.AddWithValue("@stockdate1", datePicka.Value);
                        cm.Parameters.AddWithValue("@stockinby1", txtIN.Text);
                        cm.Parameters.AddWithValue("@branchID1", Settings.Default.BranchID);
                        cm.Parameters.AddWithValue("@countID1", productCode + Form1.branch + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                        cm.ExecuteNonQuery();
                        cn.Close();
                        lblSelectedProduct.Text = "";
                        LoadProducts();
                    }));
                    return 1;
                }
                else
                {
                    return 2;
                }
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }

        public string getReference()
        {
            return productCode.Substring(0, 3).ToUpper() + DateTime.Now.ToString("/yyyy/MM/dd/HH/mm/ss/fff");
        }
        private async void txtSearch_TextChanged(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadProducts);
            holding1.Visible = true;
            task.Start();
            await task;
            holding1.Visible = false;
        }
        private void TxtRef_TextChanged(object sender, EventArgs e)
        {
            lockSave();
        }
        private void TxtAdd_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 8)
            {
                //accepts backspace
            }
            else if ((e.KeyChar < 48) || (e.KeyChar > 57)) //ascii code 48-57 between 0-9
            {
                e.Handled = true;
            }
        }
        private async void lblSelectedProduct_TextChanged(object sender, EventArgs e)
        {
            await clearUnitControls();
            await getUnits();
        }

        private void TxtIN_TextChanged(object sender, EventArgs e)
        {
            lockSave();
        }
        public void lockSave()
        {
            foreach (Control box in panel5.Controls)
            {
                if (box is TextBox)
                {
                    if (String.IsNullOrEmpty(box.Text))
                    {
                        total--;
                        btnSave.Enabled = false;
                    }
                    else
                    {
                        total++;
                        btnSave.Enabled = true;
                    }
                }
            }
        }
        //private void txtAdd_TextChanged(object sender, EventArgs e)
        //{
        //    lockSave();
        //    if (!String.IsNullOrEmpty(txtAdd.Text))
        //    {
        //        newval = txtAdd.Text;
        //    }
        //}
        private void DataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            oldval = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
            productCode = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
            txtRef.Text = getReference();
            baseunitName = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();
            lblSelectedProduct.Text = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();
        }
        public async Task getUnits()
        {
            productUnits = new List<ProductUnits>();
            cn.Open();
            try
            {
                SqlDataReader dr;
                SqlCommand sqlCommand = new SqlCommand($"EXEC usp_getproduct_units @productCode = @pcode1,@branchID = @branchID1", cn);
                sqlCommand.Parameters.AddWithValue("@pcode1", productCode);
                sqlCommand.Parameters.AddWithValue("@branchID1", Form1.branch);
                sqlCommand.ExecuteNonQuery();
                dr = sqlCommand.ExecuteReader();
                while (dr.Read())
                {
                    ProductUnits productUnits = new ProductUnits
                    {
                        baseUnit = dr["baseUnit"].ToString(),
                        costPerUnit = decimal.Parse(dr["costPerUnit"].ToString()),
                        quantityPerUnit = int.Parse(dr["quantityPerUnit"].ToString()),
                        unitname = dr["unitname"].ToString()
                    };
                    this.productUnits.Add(productUnits);
                }
                cn.Close();
            }
            catch (Exception ex)
            {
                ErrorLogging.WriteToFile(ex.ToString());
                cn.Close();
            }
            setUnitProperty(this.productUnits);
        }
        private async Task setUnitProperty(List<ProductUnits> units)
        {
            if (!String.IsNullOrEmpty(baseunitName))
            {
                UnitControl basecontrol = new UnitControl();
                basecontrol.unitLabel.Text = baseunitName.ToUpper();
                unitPanels.Controls.Add(basecontrol);
            }

            foreach (ProductUnits unit in units)
            {
                UnitControl control = new UnitControl();
                control.unitLabel.Text = unit.unitname.ToUpper();
                unitPanels.Controls.Add(control);
            }
        }
        private async Task clearUnitControls()
        {
            unitPanels.Controls.Clear();
            messageRestock = "";
            
        }
        private int getQuantity()
        {
            messageRestock = "";
            int totalBase = 0;
            foreach (Control control in unitPanels.Controls)
            {
                if (control is UnitControl unit)
                {
                    string unitID = unit.unitLabel.Text;
                    int value = (int)unit.unitValue.Value;
                    if (value > 0)
                        messageRestock = messageRestock + $"{value} {unitID.ToLower()}(s) ";
                    if (unitID != baseunitName)
                    {
                        int rate = this.productUnits.Where(u => u.unitname.ToLower() == unitID.ToLower()).Select(u => u.quantityPerUnit).FirstOrDefault();
                        totalBase += value * rate;
                    }
                    else
                    {
                        totalBase += value;
                    }
                }
            }
            return totalBase;
        }
    }
}