using System;
using Prism.Events;
namespace DTS.Common.Events
{
    /// <summary>
    /// The ShowStatus event.
    /// </summary>
    /// 
    /// <remarks>This event is used by the services to display the current status.</remarks>
    /// 
    public class ShowStatus : PubSubEvent<StatusInfo>
    {

    }

    /// <summary>
    /// The StatusInfo is used by <see cref="ShowStatus">ShowStatus</see> event to display the current status.
    /// </summary>
    public class StatusInfo
    {
        /// <summary>
        /// the current state of a process
        /// </summary>
        public enum StatusState
        {
            Idle,           //Ready state, no longer doing anything
            Busy,           //busy, currently doing something
            DoneNoError,    //no longer working, done, no errors    
            DoneFailed      //no longer working, did not complete process
        }

        public StatusState CurrentState
        {
            get;
            private set;
        }

        /// <summary>
        /// Gets or sets a value indicating whether this object is busy.
        /// </summary>
        public bool IsBusy => CurrentState == StatusState.Busy;

        /// <summary>
        /// Gets or sets the IsOk flag.
        /// </summary>
        public bool IsOk
        {
            get;
            set;
        }

        /// <summary>
        /// Gets or sets the progress bar percentage.
        /// </summary>
        public decimal Percentage
        {
            get;
            set;
        }

        /// <summary>
        /// Gets or sets the status information.
        /// </summary>
        public string Text
        {
            get;
            set;
        }

        /// <summary>
        /// Gets or sets the id of the process.
        /// </summary>
        public int ProcessId
        {
            get;
            set;
        }

        /// <summary>
        /// creates a new status info, sets the text to the default for the state
        /// note that consumers are free not to use the Text Property of the Status Info,
        /// but we set it anyhow.
        /// </summary>
        /// <param name="state"></param>
        /// <param name="percentage"></param>
        /// <param name="processId"></param>
        /// <param name="text"></param>
        /// <param name="isOk"></param>
        public StatusInfo(StatusState state, string text = null, decimal percentage = -1, int processId = -1, bool isOk = true)
        {
            CurrentState = state;
            IsOk = isOk;
            Percentage = percentage;
            Text = text;
            ProcessId = processId;
            if (null == text)
            {
                Text = Strings.Strings.ResourceManager.GetString("StatusState_" + state) ?? state.ToString();
            }
        }
        public void Unsubscribe(ShowStatus showStatus)
        {
            Text = String.Empty;
            CurrentState = StatusState.Idle;
        }
    }
}