using System;
using System.Collections.Generic;

namespace Umbraco.Core.Models.PublishedContent
{
    /// <summary>
    /// Represents a facade fragment.
    /// </summary>
    public interface IPublishedFragment
    {
        #region ContentType

        /// <summary>
        /// Gets the content type.
        /// </summary>
        PublishedContentType ContentType { get; }

        #endregion

        #region Content

        /// <summary>
        /// Gets the unique key of the facade item.
        /// </summary>
        Guid Key { get; }

        #endregion

        #region Properties

        /// <summary>
        /// Gets the properties of the content.
        /// </summary>
        /// <remarks>Contains one <c>IPublishedProperty</c> for each property defined for the content type, including
        /// inherited properties. Some properties may have no value.</remarks>
        IEnumerable<IPublishedProperty> Properties { get; }

        /// <summary>
        /// Gets a property identified by its alias.
        /// </summary>
        /// <param name="alias">The property alias.</param>
        /// <returns>The property identified by the alias.</returns>
        /// <remarks>
        /// <para>If the content type has no property with that alias, including inherited properties, returns <c>null</c>,</para>
        /// <para>otherwise return a property -- that may have no value (ie <c>HasValue</c> is <c>false</c>).</para>
        /// <para>The alias is case-insensitive.</para>
        /// </remarks>
        IPublishedProperty GetProperty(string alias);

        #endregion
    }
}