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

namespace BiskLog_Point_Of_Sale.Products_Module
{
    public partial class Prices : Form
    {
        SqlConnection cn;
        SqlCommand cm, cm1;
        DatabaseConn databasecon = new DatabaseConn();
        SqlDataReader dr;
        ProductsMainHolder mainHolder;
        List<ProductAmendment> productAmendments = new List<ProductAmendment>();
        public Prices(ProductsMainHolder productsMain, string previous_price = null, string code = null, string name = null)
        {
            InitializeComponent();
            mainHolder = productsMain;
            cn = new SqlConnection(databasecon.MyConnection());
            holding.Left = (ClientSize.Width - holding.Width) / 2;
            updateBox.Left = (ClientSize.Width - updateBox.Width) / 2;
            holding2.Left = (ClientSize.Width - holding2.Width) / 2;
           
            if (!String.IsNullOrEmpty(code))
            {
                txtProductID.Text = code;
                lblProductName.Text = name;
                previousPrice.Text = previous_price;
                newPrice.Enabled = true;
                BTNsave.Enabled = true;
            }
        }

        private async void Products_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            string productCode = products.Rows[e.RowIndex].Cells[1].Value.ToString();
            string productName = products.Rows[e.RowIndex].Cells[2].Value.ToString();
            string currentPrice = products.Rows[e.RowIndex].Cells[7].Value.ToString();
            PriceAmendmentD priceAmendment = new PriceAmendmentD(previous: currentPrice, pname: productName, pcode: productCode);
            priceAmendment.BringToFront();
            priceAmendment.ShowDialog();
            if (priceAmendment.DialogResult == DialogResult.OK)
            {
                string priceATM = currentPrice.Substring(Settings.Default.currrencyCode.Length);
                decimal pricetag = decimal.Parse(priceAmendment.newprice);
                Task<int> task = new Task<int>(() => updatePrice(pricetag, priceATM, productCode));
                holding.Visible = true;
                task.Start();
                int result = await task;
                if (result == 1)
                {
                    string Message = "You have successfully changed the price of " + productName + " from " + currentPrice + " to "
                        + Settings.Default.currrencyCode + " " + pricetag.ToString();
                    string Title = "Price changes successful";
                    NoAction action = new NoAction(message: Message, title: Title);
                    action.BringToFront();
                    action.ShowDialog();
                    LoadRecords();
                }
                else
                {
                    string Message = "An error occurred while changing the price of " + productName + " please try again later";
                    string Title = "Error while making changes";
                    NoAction action = new NoAction(message: Message, title: Title);
                    action.BringToFront();
                    action.ShowDialog();
                }
                holding.Visible = false;
            }
        }
        public int updatePrice(decimal newprice, string current, string productID)
        {
            SqlTransaction sqlTransaction = null;
            try
            {
                cn.Open();
                sqlTransaction = cn.BeginTransaction();
                cm = new SqlCommand("Insert into tblPriceChanges (pcode,previous_price,current_price,change_date,branchID,countID) values " +
                    "(@pcode,@previous_price,@current_price,@change_date,@branchID,@countID)", cn);
                cm.Parameters.AddWithValue("@pcode", productID);
                cm.Parameters.AddWithValue("@previous_price", current);
                cm.Parameters.AddWithValue("@current_price", newprice);
                cm.Parameters.AddWithValue("@change_date", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fffffff"));
                cm.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm.Parameters.AddWithValue("@countID", productID + Settings.Default.BranchID + DateTime.Now.ToString("yyyyMMddHHmmssfff"));
                cm.Transaction = sqlTransaction;
                cm.ExecuteNonQuery();
                cm1 = new SqlCommand("Update tblProduct set price = @price where pcode = @pcode and branchID = @branchID", cn);
                cm1.Parameters.AddWithValue("@pcode", productID);
                cm1.Parameters.AddWithValue("@price", newprice);
                cm1.Parameters.AddWithValue("@branchID", Settings.Default.BranchID);
                cm1.Transaction = sqlTransaction;
                cm1.ExecuteNonQuery();
                sqlTransaction.Commit();
                cn.Close();
                return 1;
            }
            catch
            {
                sqlTransaction.Rollback();
                cn.Close();
                return 0;
            }
        }
        public int LoadRecords()
        {
            try
            {
                List<string> id = new List<string>();
                int i = 0;
                products.Invoke(new Action(() =>
                {
                    products.Rows.Clear();
                    cn.Open();
                    cm = new SqlCommand("Select p.pcode,p.product_name,p.pdesc,b.brand,c.change_date,c.previous_price,c.current_price from tblProduct as p " +
                        "inner join tblBrand as b on b.id = p.bid inner join tblInventory as I on I.pcode = p.pcode inner join tblPriceChanges as c on c.pcode = p.pcode " +
                        "where p.pcode in (Select Distinct (pcode) from tblProduct where branchID = @branch and status = 'ACTIVE' and (pdesc like '%" + txtSearch.Text + "%' or " +
                        "product_name like '%" + txtSearch.Text + "%' or pcode like '%" + txtSearch.Text + "%')) order by c.change_date desc", cn);
                    cm.Parameters.AddWithValue("@branch", Settings.Default.BranchID);
                    cm.ExecuteNonQuery();
                    dr = cm.ExecuteReader();
                    while (dr.Read())
                    {
                        if (!id.Contains(dr[0].ToString()))
                        {
                            id.Add(dr[0].ToString());
                            i += 1;
                            products.Rows.Add(i, dr[0].ToString(), dr[1].ToString(), dr[2].ToString(), dr[3].ToString(), Convert.ToDateTime(dr[4].ToString()).ToString("dddd, dd MMMM yyyy HH:mm:ss"),
                                    Settings.Default.currrencyCode + " " + dr[5].ToString(), Settings.Default.currrencyCode + " " + dr[6].ToString());
                        }
                    }
                    dr.Close();
                    cn.Close();
                    products.ClearSelection();
                }));
                return 1;
            }
            catch
            {
                cn.Close();
                return 0;
            }
        }
        public int loadProduct()
        {
            productAmendments.Clear();
            try
            {
                string name = "";
                cn.Open();
                cm = new SqlCommand("Select product_name,price from tblProduct where pcode = @pcode " +
                    "Select tp.product_name,tp.pcode,tp.pdesc,tp.price as basePrice,uni.unitname as baseUnit," +
                    "tp.baseUnit as baseunitCode,um.unitname,PAU.unitCode as unitCode,PAU.[price/unit] as unitPrice," +
                    "PAU.distinctiveCode as DistinctiveCode from tblProduct tp Inner Join ProductAltUnit PAU on PAU.pcode = tp.pcode " +
                    "Inner Join UnitOfMeasure um On um.unitCode = PAU.unitCode Inner Join UnitOfMeasure uni On uni.unitCode = tp.baseUnit " +
                    "where tp.pcode = @pcode order by DistinctiveCode asc", cn);
                txtProductID.Invoke(new Action(() => cm.Parameters.AddWithValue("@pcode", txtProductID.Text)));
                cm.ExecuteNonQuery();
                dr = cm.ExecuteReader();
                dr.Read();
                if (dr.HasRows)
                {
                    lblProductName.Invoke(new Action(() =>
                    {
                        lblProductName.Text = dr[0].ToString().ToUpper();
                        previousPrice.Text = Settings.Default.currrencyCode + " " + dr[1].ToString();
                        newPrice.Enabled = true;
                        BTNsave.Enabled = true;
                        name = lblProductName.Text;
                    }));
                }
                dr.NextResult();
                while (dr.Read())
                {
                    ProductAmendment product = new ProductAmendment();
                    product.productCode = dr["pcode"].ToString();
                    product.productname = dr["product_name"].ToString();
                    product.productDescription = dr["pdesc"].ToString();
                    product.baseUnitCode = dr["baseunitCode"].ToString();
                    product.baseUnitName = dr["baseUnit"].ToString();
                    product.baseUnitprice = dr["basePrice"].ToString();
                    product.unitCode = dr["unitCode"].ToString();
                    product.unitName = dr["unitname"].ToString();
                    product.unitprice = dr["unitPrice"].ToString();
                    product.unitDistinctive = dr["DistinctiveCode"].ToString();
                    productAmendments.Add(product);
                }
                dr.Close();
                cn.Close();

                if (String.IsNullOrEmpty(name))
                {
                    lblProductName.Invoke(new Action(() =>
                    {
                        lblProductName.Text = "";
                        previousPrice.Text = "";
                        newPrice.Enabled = false;
                        BTNsave.Enabled = false;
                    }));
                    dr.Close();
                    cn.Close();
                    return 2;
                }
                return 1;
            }
            catch
            {
                lblProductName.Invoke(new Action(() =>
                {
                    lblProductName.Text = "";
                    previousPrice.Text = "";
                    newPrice.Enabled = false;
                    BTNsave.Enabled = false;
                }));
                cn.Close();
                return 0;
            }
        }
        private async void Prices_Load(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadRecords);
            holding.Visible = true;
            task.Start();
            await task;
            holding.Visible = false;
        }
        private async void BTNsave_Click(object sender, EventArgs e)
        {
            decimal newCost = decimal.Parse(newPrice.Text);
            string previous = previousPrice.Text.Substring(Settings.Default.currrencyCode.Length);
            string pcode = txtProductID.Text;
            Task<int> task = new Task<int>(() => updatePrice(newCost, previous, pcode));
            holding2.Visible = true;
            task.Start();
            int result = await task;
            if (result == 1)
            {
                string Message = "You have successfully changed the price of " + lblProductName.Text + " from " + previousPrice.Text + " to "
                    + Settings.Default.currrencyCode + " " + newCost.ToString();
                string Title = "Price changes successful";
                NoAction action = new NoAction(message: Message, title: Title);
                action.BringToFront();
                action.ShowDialog();
                LoadRecords();
            }
            else
            {
                string Message = "An error occurred while changing the price of " + lblProductName.Text + " please try again later";
                string Title = "Error while making changes";
                NoAction action = new NoAction(message: Message, title: Title);
                action.BringToFront();
                action.ShowDialog();
            }
            holding2.Visible = false;
        }

        private async void Button1_Click(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(loadProduct);
            holding2.Visible = true;
            task.Start();
            int result = await task;
            if (result == 1)
            {
                if (productAmendments.Count > 0)
                {
                    PriceAmendentForm form = new PriceAmendentForm(productAmendments);
                    form.BringToFront();
                    form.ShowDialog();
                    if(form.DialogResult == DialogResult.OK)
                    {
                        LoadRecords();
                    }
                    txtProductID.Text = "";
                    lblProductName.Text = "";
                    newPrice.Text = "";
                    previousPrice.Text = "";
                    BTNsave.Enabled = false;
                }
            }
            else if (result == 2)
            {
                string Message = "The product code you have enter could not be found!!!";
                string Title = "Product not found";
                NoAction action = new NoAction(message: Message, title: Title);
                action.BringToFront();
                action.ShowDialog();
            }
            else
            {
                string Message = "An error has occurred while looking up the product code!!!";
                string Title = "Error Occurred";
                NoAction action = new NoAction(message: Message, title: Title);
                action.BringToFront();
                action.ShowDialog();
            }
        }

        private async void TxtProductID_TextChanged(object sender, EventArgs e)
        {
            lblProductName.Text = "";
            previousPrice.Text = "";
            BTNsave.Enabled = false;
        }

        private void newPrice_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == 46)
            {
                // accepts . character
            }
            else 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 txtSearch_TextChanged(object sender, EventArgs e)
        {
            Task<int> task = new Task<int>(LoadRecords);
            holding.Visible = true;
            task.Start();
            await task;
            holding.Visible = false;
        }
    }
}