using System.Collections.ObjectModel;
using UIKit;

namespace YOUserbase;

public partial class CreateUserPage : ContentPage {

	private User user;

	public CreateUserPage ()
	{
		InitializeComponent ();
		groupPicker.ItemsSource = new List<string> (Data.Groups.Select (x => x.Name));
	}

	public CreateUserPage (User user)
	{
		InitializeComponent ();
		this.user = user;
		FirstnameEntry.Text = user.Firstname;
		LastnameEntry.Text = user.Lastname;
		birthdatePicker.Date = user.BirthDate;
		FullTimeSwitch.IsToggled = user.IsFullTime;
		DetailsEntry.Text = user.Details;
		IsExternalCheck.IsChecked = user.IsExternal;
		IsRemoteCheck.IsChecked = user.IsRemote;
		NbProjectsStepper.Value = user.NbProjects;
		groupPicker.ItemsSource = new List<string> (Data.Groups.Select (x => x.Name));
		groupPicker.SelectedIndex = Data.Groups.IndexOf (user.WorkingGroup);
		btnCreate.Text = "Save";
		contentPage.Title = "Edit user";
	}

	private async void OnCreateClicked (object sender, EventArgs e)
	{
		var isValid = true;
		string text = FirstnameEntry.Text;
		errFirstname.Text = "";
		if (String.IsNullOrWhiteSpace (text)) {
			isValid = false;
			errFirstname.Text = "First name cannot be empty";
		} else if (text.Length > 20) {
			isValid = false;
			errFirstname.Text = "First name cannot be longer than 20 characters";
		}
		text = LastnameEntry.Text;
		errLastname.Text = "";
		if (String.IsNullOrWhiteSpace (text)) {
			isValid = false;
			errLastname.Text = "Last name cannot be empty";
		} else if (text.Length > 20) {
			isValid = false;
			errLastname.Text = "Last name cannot be longer than 20 characters";
		}
		var date = birthdatePicker.Date;
		errBirthDate.Text = "";
		if (DateTime.Compare (date, DateTime.Today) > 0) {
			isValid = false;
			errBirthDate.Text = "Birth date cannot be in the future";
		}
		errGroup.Text = "";
		if (groupPicker.SelectedIndex == -1) {
			errGroup.Text = "You have to select a valid group";
		}
		errDetails.Text = "";
		if (DetailsEntry.Text.Length > 100) {
			errDetails.Text = "Detail cannot be longer than 100 characters";
		}
		if (isValid) {
			// Update
			if (user != null) {
				var usr = Data.Users.FirstOrDefault (usr => usr.Id == user.Id);
				usr.Firstname = FirstnameEntry.Text;
				usr.Lastname = LastnameEntry.Text;
				usr.BirthDate = birthdatePicker.Date.Date;
				usr.WorkingGroup = Data.Groups [groupPicker.SelectedIndex];
				usr.Details = DetailsEntry.Text;
				usr.IsFullTime = FullTimeSwitch.IsToggled;
				usr.IsExternal = IsExternalCheck.IsChecked;
				usr.IsRemote = IsRemoteCheck.IsChecked;
				usr.NbProjects = (int)NbProjectsStepper.Value;
			} else { // Create
				Data.Users.Add (new User {
					Firstname = FirstnameEntry.Text,
					Lastname = LastnameEntry.Text,
					BirthDate = birthdatePicker.Date.Date,
					WorkingGroup = Data.Groups [groupPicker.SelectedIndex],
					Details = DetailsEntry.Text,
					IsFullTime = FullTimeSwitch.IsToggled,
					IsExternal = IsExternalCheck.IsChecked,
					IsRemote = IsRemoteCheck.IsChecked,
					NbProjects = (int)NbProjectsStepper.Value,
				});
			}
			await Navigation.PopAsync ();
		}
	}

	void OnStepperChanged (System.Object sender, Microsoft.Maui.Controls.ValueChangedEventArgs e) =>
		lblNbProj.Text = ((Stepper)sender).Value.ToString ();
}