using Contracts.BindingModels;
using Contracts.SearchModels;
using Contracts.StorageContracts;
using DocumentFormat.OpenXml.Vml;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
using WinForm;

namespace AppView
{
    public partial class FormProvider : Form
    {
        private int? _id;
        public int Id { set { _id = value; } }
        public readonly IProviderStorage _providerStorage;
        public readonly ITypeStorage _typeStorage;
        private bool isEdited;
        private byte[] _logo = new byte[0];

        public FormProvider(IProviderStorage providerStorage, ITypeStorage typeStorage)
        {
            _providerStorage = providerStorage;
            _typeStorage = typeStorage;
            isEdited = false;

            InitializeComponent();
        }

        private Image byteArrayToImage(byte[] byteArrayIn)
        {
            Image res = null;
            try
            {
                MemoryStream ms = new MemoryStream(byteArrayIn, 0, byteArrayIn.Length);
                ms.Write(byteArrayIn, 0, byteArrayIn.Length);
                res = Image.FromStream(ms, true);//Exception occurs here
            }
            catch { }
            return res;
        }

        private void FormProvider_Load(object sender, EventArgs e)
        {
            dropDownList1.ExplicitEvent += OnInputChange;
            LoadData();
            if (_id.HasValue)
            {
                try
                {
                    var element = _providerStorage.GetElement(new ProviderSearchModel { Id = _id!.Value });
                    if (element != null)
                    {
                        textBoxName.Text = element.Name;
                        _logo = element.Logo;
                        dropDownList1.Selected = element.Type;
                        textBoxNumber.Text = element.Number;

                        pictureBox1.Image = byteArrayToImage(_logo);
                    }
                }
                catch(Exception ex) 
                {
                    MessageBox.Show(ex.Message, "Ошибка при получении записи", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void LoadData()
        {
            var list = _typeStorage.GetFullList().Select(item => item.Name).ToList();
            dropDownList1.Clear();
            foreach (var item in list)
            {
                dropDownList1.ComboBoxItems.Add(item);
            }

            if (_id != null)
            {
                var provider = _providerStorage.GetElement(new ProviderSearchModel() { Id = _id!.Value });
                dropDownList1.Selected = provider!.Type;
            }
        }

        private void buttonSave_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBoxName.Text))
            {
                MessageBox.Show("Название не указано.");
                return;
            }
            if (_logo.Length == 0)
            {
                MessageBox.Show("Выберите фото", "Ошибка");
                return;
            }
            if (string.IsNullOrEmpty(dropDownList1.Selected))
            {
                MessageBox.Show("Не выбран тип изделий.");
                return;
            }
            if (!Regex.IsMatch(textBoxNumber.Text, @"^\d-\d{3}-\d{3}-\d{2}-\d{2}$"))
            {
                MessageBox.Show("Неправильный формат номера телефона.");
                return;
            }

            isEdited = false;

            try
            {
                var model = new ProviderBindingModel
                {
                    Id = _id ?? 0,
                    Name = textBoxName.Text,
                    Logo = _logo,
                    Type = dropDownList1.Selected,
                    Number = textBoxNumber.Text
                };
                var action = _id.HasValue ? _providerStorage.Update(model) : _providerStorage.Insert(model);
                DialogResult = DialogResult.OK;
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

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

        private void buttonType_Click(object sender, EventArgs e)
        {
            var service = Program.ServiceProvider?.GetService(typeof(FormType));
            if (service is FormType form)
            {
                form.ShowDialog();
                LoadData();
            }
        }

        private void FormProvider_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!isEdited) return;

            var confirmResult = MessageBox.Show(
                "Имеются незафиксированные изменения." +
                "\n" +
                "Вы действительно хотите закрыть форму?",
                "Подтвердите действие",
                MessageBoxButtons.YesNo,
                MessageBoxIcon.Question
                );
            if (confirmResult == DialogResult.No) e.Cancel = true;
        }

        private void buttonImage_Click(object sender, EventArgs e)
        {
            if (ImgFile.ShowDialog() != DialogResult.OK) return;

            Image img = Image.FromFile(ImgFile.FileName);
            using (MemoryStream mStream = new MemoryStream())
            {
                img.Save(mStream, img.RawFormat);
                _logo = mStream.ToArray();
            }

            pictureBox1.Image = img;
        }

        private void OnInputChange(object sender, EventArgs e)
        {
            isEdited = true;
        }
    }
}