namespace Nuuru.Server.Services.BBCode
{
    // ============ CONTEXT ============

    /// <summary>
    /// Context for BBCode parsing to enable/disable certain features
    /// </summary>
    public enum BBCodeContext
    {
        /// <summary>
        /// Default context for booru comments - no attachments
        /// </summary>
        Comment,

        /// <summary>
        /// Forum context - enables [attachment] tags
        /// </summary>
        Forum
    }

    // ============ TOKENS ============

    public abstract record BbToken;

    public record TextToken(string Content) : BbToken;
    public record NewlineToken() : BbToken;
    public record OpenTagToken(string Name, string? Attribute) : BbToken;
    public record OpenTagWithAttributesToken(string Name, Dictionary<string, string> Attributes) : BbToken;
    public record CloseTagToken(string Name) : BbToken;

    // Line-start pattern tokens (marker only, parser handles content)
    public record GreentextToken(string Content) : BbToken;
    public record OrangetextToken(string Content) : BbToken;

    public record EmoteToken(string Name) : BbToken;

    // ============ AST NODES ============

    public abstract class BbNode;

    public class TextNode(string content) : BbNode
    {
        public string Content { get; } = content;
    }

    public class NewlineNode : BbNode;

    public class ElementNode(string tag, string? attribute, List<BbNode> children) : BbNode
    {
        public string Tag { get; } = tag;
        public string? Attribute { get; } = attribute;
        public List<BbNode> Children { get; } = children;
    }

    public class ThumbNode(int postId) : BbNode
    {
        public int PostId { get; } = postId;
    }

    public class UrlNode(string href, List<BbNode> children) : BbNode
    {
        public string Href { get; } = href;
        public List<BbNode> Children { get; } = children;
    }

    public class QuoteNode(
        string sourceType,
        string sourceId,
        string? authorName,
        string? providedHash,
        List<BbNode> children) : BbNode
    {
        public string SourceType { get; } = sourceType; // "forum" or "comment"
        public string SourceId { get; } = sourceId;     // GUID as string
        public string? AuthorName { get; } = authorName;
        public string? ProvidedHash { get; } = providedHash;
        public List<BbNode> Children { get; } = children;
    }

    public class MentionNode(Guid userId, string userName, int? postId = null, int? commentId = null) : BbNode
    {
        public Guid UserId { get; } = userId;
        public string UserName { get; } = userName;
        public int? PostId { get; } = postId;
        public int? CommentId { get; } = commentId;
    }

    public class AttachmentNode(Guid attachmentId, bool isThumbnail, int? width, int? height) : BbNode
    {
        public Guid AttachmentId { get; } = attachmentId;
        public bool IsThumbnail { get; } = isThumbnail;
        public int? Width { get; } = width;
        public int? Height { get; } = height;
    }

    public class EmoteNode(string name) : BbNode
    {
        public string Name { get; } = name;
    }
}