using Mysql_example.Database.Schema;
using Mysql_example.Util;
using System.ComponentModel;
using System.Globalization;

namespace Mysql_example
{
    public partial class UserEditForm : Form
    {
        User user;
        User user_copy;
        public delegate void SaveUserDelegate(ref User user);
        public SaveUserDelegate SaveUserCallback;
        private DataGridViewCellEventArgs mouseLocation;
        private bool isEmailValid = true;
        public UserEditForm(ref User _user)
        {
            this.user = _user;
            this.user_copy = new User(user);
            InitializeComponent();
            BindUserData();
            BindAddressData();
            this.Text = user.FirstName + " " + user.LastName;
        }
        private void BindUserData()
        {
            TextBoxFirstName.DataBindings.Clear();
            TextBoxFirstName.DataBindings.Add(nameof(TextBoxFirstName.Text), user_copy, nameof(user_copy.FirstName));
            TextBoxLastName.DataBindings.Clear();
            TextBoxLastName.DataBindings.Add(nameof(TextBoxLastName.Text), user_copy, nameof(user_copy.LastName));
            TextBoxEmail.DataBindings.Clear();
            TextBoxEmail.DataBindings.Add(nameof(TextBoxEmail.Text), user_copy, nameof(user_copy.Email));
            DateTimePickerBirthday.DataBindings.Clear();
            DateTimePickerBirthday.DataBindings.Add(nameof(DateTimePickerBirthday.Value), user_copy, nameof(user_copy.Birthday));
        }

        private void BindAddressData()
        {
            DataGridViewColumn oldColumn = DataGridViewAddresses.Columns["Country"];
            if (oldColumn != null)DataGridViewAddresses.Columns.Remove(oldColumn);

            DataGridViewAddresses.DataSource = Utility.addressesToBindingList(user_copy.Addresses);
            (DataGridViewAddresses.DataSource as BindingList<Address>).ListChanged += UserEditForm_ListChanged;
            DataGridViewAddresses.Columns[nameof(Address.Region)].Visible= false;
            DataGridViewAddresses.Columns[nameof(Address.RegionCode)].Visible = false;
            DataGridViewComboBoxColumn countryColumn= new DataGridViewComboBoxColumn();
            countryColumn.HeaderText = "Country";
            countryColumn.Name= "Country";

            countryColumn.DataSource = Address.regionInfos;
            countryColumn.DisplayMember = nameof(RegionInfo.EnglishName);
            countryColumn.DataPropertyName = nameof(Address.Region);
            countryColumn.ValueMember = nameof(RegionInfo.Name);

            DataGridViewAddresses.Columns.Add(countryColumn);
        }

        private void UserEditForm_ListChanged(object? sender, ListChangedEventArgs e)
        {
            BindingList<Address> bindingList = sender as BindingList<Address>;
            if (e.ListChangedType == ListChangedType.ItemAdded && bindingList.Count > user_copy.Addresses.Values.Count)
            {
                Address newAddress = bindingList.Last();
                user_copy.Addresses[newAddress.Id] = newAddress;
            }
            if (e.ListChangedType == ListChangedType.ItemDeleted && bindingList.Count < user_copy.Addresses.Values.Count)
            {
                Address oldAddress = user_copy.Addresses.Values.ToList()[e.NewIndex];
                user_copy.Addresses.Remove(oldAddress.Id);
                user_copy.deletedAddreses.Add(oldAddress);
                if (user_copy.BillingAdress != null && user_copy.BillingAdress.Id == oldAddress.Id) user_copy.BillingAdress = null;
                if (user_copy.BillingAdress != null && user_copy.ShippingAddress.Id == oldAddress.Id) user_copy.ShippingAddress = null;
            }
        }
        private void DataGridViewAddresses_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            DataGridViewRow dataRow = DataGridViewAddresses.Rows[e.RowIndex];
            Address address = dataRow.DataBoundItem as Address;
            if(address == null) return;

            string matches = "";
            if (user_copy.BillingAdress != null && user_copy.BillingAdress.Id == address.Id) matches += "billing";
            if (user_copy.ShippingAddress != null && user_copy.ShippingAddress.Id == address.Id) matches += "shipping";

            switch (matches)
            {
                case "billing":
                    dataRow.DefaultCellStyle.BackColor = Color.Green;
                    break;
                case "shipping":
                    dataRow.DefaultCellStyle.BackColor = Color.Yellow;
                    break;
                case "billingshipping":
                    dataRow.DefaultCellStyle.BackColor = Color.Blue;
                    break;
                default:
                    dataRow.DefaultCellStyle.BackColor = base.BackColor;
                    break;
            }
        }

        private void CancelButton_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void RevertButton_Click(object sender, EventArgs e)
        {
            DialogResult dialogResult = MessageBox.Show("You will loose all your Changes", "revert Changes", MessageBoxButtons.YesNo);
            if (dialogResult == DialogResult.No) return;

            user_copy = new User(user);
            BindUserData();
            BindAddressData();
        }
        private void SaveButton_Click(object sender, EventArgs e)
        {
            if (!isEmailValid)
            {
                MessageBox.Show("Can't Save Email is Invalid");
                return;
            }
            SaveUserCallback(ref user_copy);
            Close();
        }

        // Update Copy of User Callbacks
        private void DataGridViewAddresses_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
        {
            mouseLocation = e;
        }
        private void ToolStripMenuItemMakeDefaultBilling_Click(object sender, EventArgs e)
        {
            if (DataGridViewAddresses.Rows.Count - 1 == mouseLocation.RowIndex) return;
            DataGridViewRow row  = DataGridViewAddresses.Rows[mouseLocation.RowIndex];
            Address address = row.DataBoundItem as Address;
            user_copy.BillingAdress = address;
            DataGridViewAddresses.Refresh();
        }
        private void ToolStripMenuItemMakeDefaultShipping_Click(object sender, EventArgs e)
        {
            if (DataGridViewAddresses.Rows.Count - 1 == mouseLocation.RowIndex) return;
            DataGridViewRow row = DataGridViewAddresses.Rows[mouseLocation.RowIndex];
            Address address = row.DataBoundItem as Address;
            user_copy.ShippingAddress = address;
            DataGridViewAddresses.Refresh();
        }
        private void ToolStripMenuItemDelete_Click(object sender, EventArgs e)
        {
            DialogResult dialogResult = MessageBox.Show("Delete Address?", "Address Deletion", MessageBoxButtons.YesNo);
            if (dialogResult == DialogResult.No) return;

            if (DataGridViewAddresses.Rows.Count - 1 == mouseLocation.RowIndex) return;
            DataGridViewRow row = DataGridViewAddresses.Rows[mouseLocation.RowIndex];
            Address address = row.DataBoundItem as Address;
            (DataGridViewAddresses.DataSource as BindingList<Address>).Remove(address);
        }
        private void DataGridViewAddresses_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            bool validClick = (e.RowIndex != -1 && e.ColumnIndex != -1);

            if (validClick) DataGridViewAddresses.BeginEdit(true);
            if (DataGridViewAddresses.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn && validClick) ((ComboBox)DataGridViewAddresses.EditingControl).DroppedDown = true;
        }
        private void DataGridViewAddresses_CurrentCellDirtyStateChanged(object sender, EventArgs e)
        {
            DataGridViewAddresses.CommitEdit(DataGridViewDataErrorContexts.Commit);
        }

        public void TextBoxEmail_Validating(object sender, System.ComponentModel.CancelEventArgs e)
        {
            if (Utility.IsValidEmail(TextBoxEmail.Text))
            {
                ErrorProviderUserEdit.SetError(TextBoxEmail, "");
                isEmailValid = true;
                return;
            }

            ErrorProviderUserEdit.SetError(TextBoxEmail, "Email is Invalid");
            ErrorProviderUserEdit.SetIconPadding(TextBoxEmail, 3);
            isEmailValid = false;
        }
    }
}