using System.Globalization;
using WheresMyMoney.Maui.Core;

namespace WheresMyMoney.Maui;

public partial class ModifyPlannedPaymentPage : ContentPage
{
    private readonly PlannedPayment? _plannedPayment;

    public ModifyPlannedPaymentPage(int id)
    {
        InitializeComponent();
        RepeatPicker.SelectedIndex = 2;
        _plannedPayment = Repository.Instance.GetPlannedPayment(id);
    }

    protected override async void OnAppearing()
    {
        base.OnAppearing();

        if (_plannedPayment is null)
        {
            await Navigation.PopModalAsync();
        }
        else
        {
            NameEntry.Text = _plannedPayment.Name;
            AmountEntry.Text = _plannedPayment.Amount.ToString("C");
            SubscriptionSwitch.IsToggled = _plannedPayment.IsSubscription;
            RepeatPicker.SelectedIndex = (int?)_plannedPayment.ReoccurenceType ?? 2;
            EveryEntry.Text = _plannedPayment.Reoccurences?.ToString() ?? "1";
            StartDateEntry.Date = _plannedPayment.DateStart.Date;
            EndDateEntry.Date = _plannedPayment.DateEnd?.Date ?? DateTime.Today;
            IndefiniteSwitch.IsToggled = _plannedPayment.DateEnd is null;
        }
    }

    private async void Modify_OnClicked(object? sender, EventArgs e)
    {
        if (!decimal.TryParse(AmountEntry.Text, NumberStyles.Currency, CultureInfo.CurrentCulture,
                out var amount)) return;
        var isSubscription = SubscriptionSwitch.IsToggled;
        var every = -1;
        var reoccurenceType = (ReoccurenceType)RepeatPicker.SelectedIndex;
        if (isSubscription)
        {
            isSubscription = int.TryParse(EveryEntry.Text, out every) && every > 0;
        }

        Repository.Instance.UpdatePlannedPayment(_plannedPayment! with
        {
            Amount = amount, Name = NameEntry.Text, DateStart = StartDateEntry.Date,
            DateEnd = !isSubscription || IndefiniteSwitch.IsToggled ? null : EndDateEntry.Date,
            IsSubscription = isSubscription, Reoccurences = isSubscription ? every : null,
            ReoccurenceType = isSubscription ? reoccurenceType : null
        });

        await Navigation.PopModalAsync();
    }

    private void NameEntry_OnCompleted(object? sender, EventArgs e)
    {
        if (SubscriptionSwitch.IsToggled)
        {
            EveryEntry.Focus();
        }
        else
        {
            EveryEntry_OnCompleted(sender, e);
        }
    }

    private void EveryEntry_OnCompleted(object? sender, EventArgs e)
    {
        this.AmountEntry.Focus();
    }
}