using DevExpress.Blazor;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Rendering;
using System.Text.RegularExpressions;

namespace AyCode.Blazor.Components.Components.Grids;

/// <summary>
/// Extended DxGridDataColumn with additional parameters for InfoPanel support.
/// </summary>
public class MgGridDataColumn : DxGridDataColumn
{
    private string? _urlLink;
    private bool _isInitialized;

    /// <summary>
    /// Whether this column should be visible in the InfoPanel. Default is true.
    /// </summary>
    [Parameter]
    public bool ShowInInfoPanel { get; set; } = true;

    /// <summary>
    /// Custom display format for InfoPanel (overrides DisplayFormat if set).
    /// </summary>
    [Parameter]
    public string? InfoPanelDisplayFormat { get; set; }

    /// <summary>
    /// Column order in InfoPanel (lower = earlier). Default is int.MaxValue.
    /// </summary>
    [Parameter]
    public int InfoPanelOrder { get; set; } = int.MaxValue;

    /// <summary>
    /// URL template with {property} placeholders that will be replaced with row values.
    /// Example: https://shop.fruitbank.hu/Admin/Order/Edit/{Id}/{OrderId}
    /// </summary>
    [Parameter]
    public string? UrlLink
    {
        get => _urlLink;
        set
        {
            if (_urlLink == value) return;
            _urlLink = value;
            if (_isInitialized) UpdateCellDisplayTemplate();
        }
    }

    protected override void OnParametersSet()
    {
        base.OnParametersSet();
        _isInitialized = true;
        UpdateCellDisplayTemplate();
    }

    private void UpdateCellDisplayTemplate()
    {
        if (!string.IsNullOrWhiteSpace(_urlLink))
        {
            CellDisplayTemplate = context => builder =>
            {
                var url = BuildUrlFromTemplate(_urlLink, context.DataItem);
                builder.OpenElement(0, "a");
                builder.AddAttribute(1, "href", url);
                builder.AddAttribute(2, "target", "_blank");
                builder.AddAttribute(3, "style", "text-decoration: none;");
                builder.AddContent(4, context.DisplayText);
                builder.CloseElement();
            };
        }
    }

    /// <summary>
    /// Replaces {property} placeholders in the template with values from the data item.
    /// Exposed for unit testing.
    /// </summary>
    internal static string BuildUrlFromTemplate(string template, object? dataItem)
    {
        if (dataItem == null) return template;
        return Regex.Replace(template, "{([^}]+)}", match =>
        {
            var propName = match.Groups[1].Value;
            var prop = dataItem.GetType().GetProperty(propName);
            if (prop != null)
            {
                var value = prop.GetValue(dataItem);
                return value?.ToString() ?? string.Empty;
            }
            return match.Value;
        });
    }
}