using System;
using JD.Kernel.StaticHelpers;

namespace JD.TeaBoxAddinSystem.Addins.Internal
{
    /// <summary>
    /// An <see cref="AddinManifest"/> forms the identity of an <see cref="Addin"/>.
    /// </summary>
    /// <remarks>
    /// All fields are optional.
    /// </remarks>
    public class AddinManifest
    {
        #region Variables

        private readonly Addin m_owner;

        private readonly string m_id;
        private string m_name;
        private Version m_version = new Version();
        private string m_author;
        private string m_url;
        private string m_description;
        private string m_category;
        private bool m_x86only;

        private static int m_nextAutogeneratedId = 1;

        #endregion

        #region Constructor

        /// <summary>
        /// Constructor. Id is generated.
        /// </summary>
        /// <param name="addin"></param>
        public AddinManifest(Addin addin)
            : this(addin, null)
        {
        }

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="addin"></param>
        /// <param name="id">Id of the addin. If null or empty, it will be autogenerated.</param>
        public AddinManifest(Addin addin, string id)
        {
            Throw.IfNull(addin, "addin");

            m_owner = addin;
            m_id = string.IsNullOrEmpty(id) ? AutogenerateId() : id;
            m_name = id;
        }

        #endregion

        #region Properties

        /// <summary>
        /// Id of the addin.
        /// </summary>
        public string Id
        {
            get { return m_id; }
        }

        /// <summary>
        /// Name of the addin.
        /// </summary>
        public string Name
        {
            get { return m_name; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_name = value;
            }
        }

        /// <summary>
        /// Version of the addin.
        /// </summary>
        public Version Version
        {
            get { return m_version; }
            set
            {
                Throw.IfNull(value, "Version");
                m_owner.ThrowIfLoaded();
                m_version = value;
            }
        }

        /// <summary>
        /// Author of the addin.
        /// </summary>
        public string Author
        {
            get { return m_author; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_author = value;
            }
        }

        /// <summary>
        /// Url of the addin.
        /// </summary>
        public string Url
        {
            get { return m_url; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_url = value;
            }
        }

        /// <summary>
        /// Description of the addin.
        /// </summary>
        public string Description
        {
            get { return m_description; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_description = value;
            }
        }

        /// <summary>
        /// Category of the addin.
        /// </summary>
        public string Category
        {
            get { return m_category; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_category = value;
            }
        }

        public bool X86Only
        {
            get { return m_x86only; }
            set
            {
                m_owner.ThrowIfLoaded();
                m_x86only = value;
            }
        }

        /// <summary>
        /// Full Id.
        /// </summary>
        public string FullId
        {
            get
            {
                return Id;
            }
        }

        #endregion

        #region Methods

        private static string AutogenerateId()
        {
            const string AutogeneratedIdPrefix = "__autoid__";
            return AutogeneratedIdPrefix + m_nextAutogeneratedId++;
        }

        #endregion
    }
}