using BusinessLogic;
using DataContracts.bindingModels;
using DataContracts.searchModels;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ClientForms
{
    public partial class Client : Form
    {
        private readonly ClientBL clientBL = new ClientBL();
        private readonly ProductBL productBL = new ProductBL();
        private int? _id;
        private bool fioFlag = false;
        private bool emailFlag = false;
        private bool photoFlag = false;
        private bool EditfioFlag = false;
        private bool EditemailFlag = false;
        private bool EditphotoFlag = false;
        private bool close = false;
        private byte[] image;
        private List<string> oldProducts = new List<string>();
        public int? Id { get { return _id; } set { _id = value; } }
        public Client()
        {
            InitializeComponent();
            myEmailTextBox.ValueChanged += EmailTextBox_TextChanged;
            myEmailTextBox.Pattern = "^[^@\\s]+@[^@\\s]+\\.[^@\\s]+$";
        }

        private void Client_Load(object sender, EventArgs e)
        {
            LoadData();
            if (Id.HasValue)
            {
                var current_client = clientBL.ReadElement(new ClientSearchModel { Id = Id });
                if(current_client != null)
                {
                    textBoxFIO.Text = current_client.FIO;
                    myEmailTextBox.TextBoxValue = current_client.email;
                    image = current_client.photo;
                    oldProducts = current_client.products.Split(',').ToList();
                    buttonPhoto.BackColor = Color.DarkOliveGreen;
                    myCheckListProducts.setValues(current_client.products.Split(',').ToList());
                    EditfioFlag = false;
                    EditemailFlag = false;
                    EditphotoFlag = false;
                    fioFlag = true;
                    emailFlag = true;
                    photoFlag = true;
                }
            }
        }
        private bool checkProducts()
        {
            if(oldProducts.Count != myCheckListProducts.getSelectedItems().Count)
                return true;
            foreach(var oldProd in oldProducts)
            {
                if(!myCheckListProducts.getSelectedItems().Contains(oldProd))
                    return true;
            }
            return false;
        }
        private void LoadData()
        {
            myCheckListProducts.LoadValues(productBL.ReadList().Select(x => x.title).ToList());
        }
        private void textBoxFIO_TextChanged(object sender, EventArgs e)
        {
            EditfioFlag = true;
            if (textBoxFIO.Text.Length != 0)
            { 
                fioFlag = true;
                textBoxFIO.BackColor = Color.DarkOliveGreen;
            }
            else
            {
                fioFlag = false;
                textBoxFIO.BackColor = Color.IndianRed;
            }
                
        }
        private void EmailTextBox_TextChanged(object sender, EventArgs e)
        {
            EditemailFlag = true;
            if (myEmailTextBox.TextBoxValue != null)
            {
                emailFlag = true;
                myEmailTextBox.BackColor = Color.DarkOliveGreen;
            }
            else
            {
                emailFlag = false;
                myEmailTextBox.BackColor = Color.IndianRed;
            }
        }

        private void buttonPhoto_Click(object sender, EventArgs e)
        {
            EditphotoFlag = true;
            if (openFileDialogPath.ShowDialog() == DialogResult.Cancel)
                return;
            string filename = openFileDialogPath.FileName;
            Image img = Image.FromFile(filename);
            byte[] bA;
            using (MemoryStream mStream = new MemoryStream())
            {
                img.Save(mStream, img.RawFormat);
                bA = mStream.ToArray();
            }
            image = bA;
            photoFlag = true;
            buttonPhoto.BackColor = Color.DarkOliveGreen;
        }

        private void buttonSave_Click(object sender, EventArgs e)
        {
            if(fioFlag & emailFlag & photoFlag & myCheckListProducts.selectedValuesCount != 0)
            {
                if(!Id.HasValue)
                    clientBL.Create(new ClientBindingModel { 
                        FIO = textBoxFIO.Text,
                        email = myEmailTextBox.TextBoxValue,
                        photo = image,
                        products = string.Join(",", myCheckListProducts.getSelectedItems().ToArray())
                    });
                else
                    clientBL.Update(new ClientBindingModel
                    {
                        Id = (int)Id,
                        FIO = textBoxFIO.Text,
                        email = myEmailTextBox.TextBoxValue,
                        photo = image,
                        products = string.Join(",", myCheckListProducts.getSelectedItems())
                    });
                close = true;
                this.Close();
            }
            else
            {
                MessageBox.Show("Не заполнены поля");
            }
        }

        private void Client_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (close)
            {
                e.Cancel = false;
                return;
            }
                
            if ((EditfioFlag || EditemailFlag || EditphotoFlag || checkProducts()))
            {
                DialogResult dialogResult = MessageBox.Show("Вы забыли сохранить изменения! Желаете выйти?", "Важно", MessageBoxButtons.YesNo);
                    if (dialogResult == DialogResult.Yes)
                        e.Cancel = false;
                    else
                        e.Cancel = true;
            }
            
        }
    }
}