// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using Aspire.Dashboard.Resources;
 
namespace Aspire.Dashboard.Model.Otlp;
 
public class FilterDialogFormModel : IValidatableObject
{
    [Required(ErrorMessageResourceType = typeof(Dialogs), ErrorMessageResourceName = nameof(Dialogs.FieldRequired))]
    public SelectViewModel<string>? Parameter { get; set; }
 
    [Required(ErrorMessageResourceType = typeof(Dialogs), ErrorMessageResourceName = nameof(Dialogs.FieldRequired))]
    public SelectViewModel<FilterCondition>? Condition { get; set; }
 
    public bool ValueIsNumeric { get; set; }
 
    public bool ValueIsDate { get; set; }
 
    // Duration filters intentionally support only whole milliseconds. An int is large enough for typical trace durations.
    public int? NumericValue { get; set; }
 
    /// <summary>
    /// Gets the current value formatted for an HTML datetime-local input element.
    /// Parses the ISO 8601 value into "yyyy-MM-ddTHH:mm:ss" format expected by the input.
    /// </summary>
    public string? DateTimeLocalValue
    {
        get
        {
            if (Value is { Length: > 0 } v &&
                DateTime.TryParse(v, CultureInfo.InvariantCulture, DateTimeStyles.None, out var dateTime))
            {
                return dateTime.ToString("yyyy-MM-dd\\THH:mm:ss", CultureInfo.InvariantCulture);
            }
            return null;
        }
    }
 
    // Set a max length on value because it will be added to the query string.
    // Max length is protection against accidently building a query string that exceeds limits because of a very long value.
    [MaxLength(1024, ErrorMessageResourceType = typeof(Dialogs), ErrorMessageResourceName = nameof(Dialogs.FieldTooLong))]
    public string? Value { get; set; }
 
    public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
    {
        if (ValueIsNumeric)
        {
            if (NumericValue is null)
            {
                yield return new ValidationResult(Dialogs.FieldRequired, [nameof(NumericValue)]);
            }
        }
        else if (string.IsNullOrWhiteSpace(Value))
        {
            yield return new ValidationResult(Dialogs.FieldRequired, [nameof(Value)]);
        }
        else if (ValueIsDate && !DateTime.TryParse(Value, CultureInfo.InvariantCulture, DateTimeStyles.None, out _))
        {
            yield return new ValidationResult(Dialogs.FilterDialogInvalidDate, [nameof(Value)]);
        }
    }
}