using System.Collections.ObjectModel;
using WheresMyMoney.Maui.Core;

namespace WheresMyMoney.Maui;

public partial class PlannedPaymentsPage : ContentPage
{
    public ObservableCollection<FullPlannedPaymentViewModel> FullPlannedPaymentViewModels { get; set; } = [];

    public PlannedPaymentsPage()
    {
        InitializeComponent();
        BindingContext = this;
        UpdateUi();
        Repository.Instance.DataChanged += OnDataChanged;
    }

    private void OnDataChanged(object? sender, EventArgs e)
    {
        UpdateUi();
    }

    private void UpdateUi()
    {
        FullPlannedPaymentViewModels.Clear();
        foreach (var plannedPayment in Repository.Instance.GetAllPlannedPayments())
        {
            FullPlannedPaymentViewModels.Add(new FullPlannedPaymentViewModel(plannedPayment.Id,
                plannedPayment.Amount.ToString("C"), plannedPayment.Name,
                plannedPayment.DateStart.ToString("yyyy-MM-dd"),
                plannedPayment.DateEnd?.ToString("yyyy-MM-dd") ?? string.Empty, plannedPayment.DateEnd is not null,
                plannedPayment.IsSubscription,
                plannedPayment.Reoccurences,
                ReoccurenceTypeToString(plannedPayment.Reoccurences, plannedPayment.ReoccurenceType)));
        }
    }

    private static string ReoccurenceTypeToString(int? plannedPaymentReoccurences,
        ReoccurenceType? plannedPaymentReoccurenceType) =>
        plannedPaymentReoccurenceType switch
        {
            ReoccurenceType.Days => plannedPaymentReoccurences switch
            {
                1 => "dzień",
                _ => "dni"
            },
            ReoccurenceType.Weeks => (plannedPaymentReoccurences, plannedPaymentReoccurences % 10) switch
            {
                (1, _) => "tydzień",
                (_, > 1 and < 5) => "tygodnie",
                _ => "tygodni"
            },
            ReoccurenceType.Months => (plannedPaymentReoccurences, plannedPaymentReoccurences % 10) switch
            {
                (1, _) => "miesiąc",
                (_, > 1 and < 5) => "miesiące",
                _ => "miesięcy"
            },
            ReoccurenceType.Years => (plannedPaymentReoccurences, plannedPaymentReoccurences % 10) switch
            {
                (1, _) => "rok",
                (_, > 1 and < 5) => "lata",
                _ => "lat"
            },
            ReoccurenceType.EveryLastDayOfMonth => "ostatni dzień miesiąca",
            _ => string.Empty
        };

    private async void InsertPlannedPayment_OnClicked(object? sender, EventArgs e)
    {
        await Navigation.PushModalAsync(new AddPlannedPaymentPage());
    }

    private async void RemovePlannedPayment_OnClicked(object? sender, EventArgs e)
    {
        if (sender is not Button button) return;
        var answer = await DisplayAlert("Usunąć?", "Czy na pewno chcesz usunąć tą płatność?", "Tak", "Nie");
        if (!answer) return;
        var id = (int)button.CommandParameter;
        Repository.Instance.RemovePlannedPayment(id);
    }
}