using System.Text;

using AIStudio.Tools.PluginSystem;

namespace AIStudio.Provider;

public static class SourceExtensions
{
    private static string TB(string fallbackEN) => I18N.I.T(fallbackEN, typeof(SourceExtensions).Namespace, nameof(SourceExtensions));
    
    /// <summary>
    /// Converts a list of sources to a markdown-formatted string.
    /// </summary>
    /// <param name="sources">The list of sources to convert.</param>
    /// <returns>A markdown-formatted string representing the sources.</returns>
    public static string ToMarkdown(this IList<Source> sources)
    {
        var sb = new StringBuilder();
        sb.Append("## ");
        sb.AppendLine(TB("Sources"));

        var sourceNum = 0;
        foreach (var source in sources)
        {
            sb.Append($"- [{++sourceNum}] ");
            sb.Append('[');
            sb.Append(source.Title);
            sb.Append("](");
            sb.Append(source.URL);
            sb.AppendLine(")");
        }
        
        return sb.ToString();
    }
    
    /// <summary>
    /// Merges a list of added sources into an existing list of sources, avoiding duplicates based on URL and Title.
    /// </summary>
    /// <param name="sources">The existing list of sources to merge into.</param>
    /// <param name="addedSources">The list of sources to add.</param>
    public static void MergeSources(this IList<Source> sources, IList<ISource> addedSources)
    {
        foreach (var addedSource in addedSources)
            if (sources.All(s => s.URL != addedSource.URL && s.Title != addedSource.Title))
                sources.Add((Source)addedSource);
    }
}