using System;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Configuration;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.Wpf;
using InABox.WPF;
using OpenExchangeRates;
using Exception = System.Exception;

namespace PRSDesktop;

public class ForeignCurrencyGridSettings : BaseObject, IGlobalConfigurationSettings
{
    [TextBoxEditor] 
    [EditorSequence(1)] 
    public string ApiKey { get; set; } = "";

    [TextBoxEditor] 
    [EditorSequence(2)] 
    public string BaseCurrency { get; set; } = "AUD";

    [IntegerEditor]
    [EditorSequence(3)]
    public int Digits { get; set; } = 4;

}

public class ForeignCurrencyGridPreferences : BaseObject, IUserConfigurationSettings
{
    public DynamicGridSelectedFilterSettings Filters { get; set; } = new();
}

public class ForeignCurrencyGrid : DynamicDataGrid<ForeignCurrency>
{
    private readonly BitmapImage tick = PRSDesktop.Resources.tick.AsBitmapImage();

    private readonly Button update;

    private ForeignCurrencyGridSettings _settings;
    
    private ForeignCurrencyGridPreferences _preferences;
    
    public ForeignCurrencyGrid()
    {
        Task[] tasks = {
            Task.Run(() =>
            {
                _settings = new GlobalConfiguration<ForeignCurrencyGridSettings>().Load();
            }),
        
            Task.Run(() =>
            {
                _preferences = new UserConfiguration<ForeignCurrencyGridPreferences>().Load();
            }),
        };
        Task.WaitAll(tasks);
        
        FilterComponent.SetSettings(_preferences!.Filters, false);
        FilterComponent.OnFiltersSelected += FilterComponent_OnFilterSelected;
        
        HiddenColumns.Add(x=>x.Code);
        HiddenColumns.Add(x=>x.Description);
        HiddenColumns.Add(x=>x.Identifier);
        HiddenColumns.Add(x=>x.Active);
        ActionColumns.Add(new DynamicTickColumn<ForeignCurrency,bool>(x=>x.Active, tick, tick, null, ToggleActive));
        AddButton(null, PRSDesktop.Resources.autoupdate.AsBitmapImage(), UpdateSettings);
        update = AddButton("Update", PRSDesktop.Resources.payment.AsBitmapImage(), UpdateExchangeRates);
        update.Visibility = !string.IsNullOrEmpty(_settings!.ApiKey) ? Visibility.Visible : Visibility.Collapsed;
    }
    
    private void FilterComponent_OnFilterSelected(DynamicGridSelectedFilterSettings settings)
    {
        _preferences.Filters = settings;
        new UserConfiguration<ForeignCurrencyGridPreferences>().Save(_preferences);
    }

    private bool UpdateSettings(Button button, CoreRow[] rows)
    {
        if (DynamicGridUtils.EditObject(_settings))
        {
            new GlobalConfiguration<ForeignCurrencyGridSettings>().Save(_settings);
            update.Visibility = !string.IsNullOrEmpty(_settings.ApiKey) ? Visibility.Visible : Visibility.Collapsed;
        }
        return false;
    }

    private bool ToggleActive(CoreRow? row)
    {
        if (row == null)
            return false;
        var fc = row.ToObject<ForeignCurrency>();
        fc.Active = !fc.Active;
        new Client<ForeignCurrency>().Save(fc, $"Set to {(fc.Active ? "Active" : "InActive")} ");
        return true;
    }
    
    protected override BaseEditor? GetEditor(object item, DynamicGridColumn column)
    {
        BaseEditor? editor;
        if (column.ColumnName.Equals(nameof(ForeignCurrency.Identifier)) && string.IsNullOrWhiteSpace(_settings.ApiKey))
        {
            editor = base.GetEditor(item, column)?.CloneEditor() ?? new NullEditor();
            editor.Editable = Editable.Hidden;
            editor.Visible = Visible.Hidden;
        }
        else if (column.ColumnName.Equals(nameof(ForeignCurrency.ExchangeRate)))
        {
            var dblEditor = (base.GetEditor(item, column)?.CloneEditor() as DoubleEditor) ?? new DoubleEditor();
            dblEditor.Digits = _settings.Digits;
            editor = dblEditor;
        }
        else 
            editor = base.GetEditor(item, column);

        return editor;
    }


    private bool UpdateExchangeRates(Button button, CoreRow[] rows)
    {
        try
        {
            Progress.ShowModal("Retrieving Currencies", progress =>
            {
                var data = new Client<ForeignCurrency>().Query().ToObjects<ForeignCurrency>().ToList();
                progress.Report("Updating Data");
                using (var client = new OpenExchangeRatesClient("ff16587e173b43788a34c035a2c53edd"))
                {
                    var currencies = client.GetCurrenciesAsync().Result;
                    if (currencies == null)
                        throw new Exception("No Currencies Returned");

                    var rates = client.GetLatestRatesAsync().Result;
                    if (rates == null)
                        throw new Exception("No Rates Returned");

                    if (!rates.Rates.TryGetValue("AUD", out decimal aud_decimal))
                        throw new Exception("Cannot Find AUD rate");

                    var usd_aud = Convert.ToDouble(aud_decimal);
                    if (usd_aud.IsEffectivelyEqual(0.0))
                        throw new Exception("USD -> AUD conversion return 0.00");

                    foreach (var rate in rates.Rates)
                    {
                        var foreign_usd = Convert.ToDouble(rate.Value);
                        var items = data.Where(x => String.Equals(x.Identifier, rate.Key)).ToList();
                        if (!items.Any())
                        {
                            if (currencies.TryGetValue(rate.Key, out string? description))
                            {
                                var newitem = new ForeignCurrency()
                                {
                                    Code = rate.Key,
                                    Description = description,
                                    Identifier = rate.Key,
                                    Active = false
                                };
                                items.Add(newitem);
                                data.Add(newitem);
                            }
                        }

                        foreach (var item in items)
                            item.ExchangeRate =  foreign_usd / usd_aud;
                    }
                }

                foreach (var currency in data.Where(x => 
                    !String.IsNullOrWhiteSpace(x.Identifier) 
                    && String.IsNullOrWhiteSpace(x.Symbol)))
                {
                    currency.Symbol = currency.Identifier;
                }

                var updates = data.Where(x => x.IsChanged()).ToArray();
                if (updates.Any())
                {
                    progress.Report($"Updating {updates.Length} records...");
                    new Client<ForeignCurrency>().Save(updates, "Updated from openexchangerates.org");
                }
                
            });
            
        }
        catch (Exception e)
        {
            MessageWindow.ShowError("Error retrieving data!", e);
        }
        return true;
    }
        
}