using System;
using Spectre.Console.Rendering;

namespace Spectre.Console
{
    /// <summary>
    /// Represents a context that can be used to interact with a <see cref="LiveDisplay"/>.
    /// </summary>
    public sealed class LiveDisplayContext
    {
        private readonly IAnsiConsole _console;

        internal object Lock { get; }
        internal LiveRenderable Live { get; }

        internal LiveDisplayContext(IAnsiConsole console, IRenderable target)
        {
            _console = console ?? throw new ArgumentNullException(nameof(console));

            Live = new LiveRenderable(_console, target);
            Lock = new object();
        }

        /// <summary>
        /// Updates the live display target.
        /// </summary>
        /// <param name="target">The new live display target.</param>
        public void UpdateTarget(IRenderable? target)
        {
            lock (Lock)
            {
                Live.SetRenderable(target);
                Refresh();
            }
        }

        /// <summary>
        /// Refreshes the live display.
        /// </summary>
        public void Refresh()
        {
            lock (Lock)
            {
                _console.Write(new ControlCode(string.Empty));
            }
        }

        internal void SetOverflow(VerticalOverflow overflow, VerticalOverflowCropping cropping)
        {
            Live.Overflow = overflow;
            Live.OverflowCropping = cropping;
        }
    }
}