namespace ChatRAG.Models
{
    /// <summary>
    /// Modelo para saída de dados (READ)
    /// </summary>
    public class DocumentOutput
    {
        public string Id { get; set; } = string.Empty;
        public string Title { get; set; } = string.Empty;
        public string Content { get; set; } = string.Empty;
        public string ProjectId { get; set; } = string.Empty;
        public Dictionary<string, object>? Metadata { get; set; }
        public DateTime CreatedAt { get; set; }
        public DateTime UpdatedAt { get; set; }
        public double[]? Embedding { get; set; }

        public TextoComEmbedding ToTextoComEmbedding()
        {
            return new TextoComEmbedding
            {
                Id = Id,
                Titulo = Title,
                Conteudo = Content,
                ProjetoId = ProjectId,
                Embedding = Embedding
            };
        }

        public static DocumentOutput FromTextoComEmbedding(TextoComEmbedding texto)
        {
            return new DocumentOutput
            {
                Id = texto.Id,
                Title = texto.Titulo,
                Content = texto.Conteudo,
                ProjectId = texto.ProjetoId,
                Embedding = texto.Embedding,
                CreatedAt = DateTime.UtcNow,
                UpdatedAt = DateTime.UtcNow
            };
        }

        public string GetContentPreview(int maxLength = 200)
        {
            if (string.IsNullOrEmpty(Content))
                return string.Empty;

            if (Content.Length <= maxLength)
                return Content;

            return Content.Substring(0, maxLength) + "...";
        }

        public bool HasEmbedding() => Embedding != null && Embedding.Length > 0;

        public DocumentInput ToInput()
        {
            return new DocumentInput
            {
                Id = Id,
                Title = Title,
                Content = Content,
                ProjectId = ProjectId,
                Metadata = Metadata,
                CreatedAt = CreatedAt,
                UpdatedAt = UpdatedAt
            };
        }
    }
}