using UnityEngine.SceneManagement;

/// <summary>
/// LOAD command. Load the specified scene by name.
/// </summary>

namespace UnityConsole.Commands
{
    public static class LoadSceneCommand
    {
        public static readonly string name = "LoadScene";

        public static readonly string description =
            "Load the specified scene by name. Before you can load a scene you have to add it to the list of levels used in the game. Use File->Build Settings... in Unity and add the levels you need to the level list there.";

        public static readonly string usage = "Load scene";

        public static ConsoleCommandResult Execute(params string[] args)
        {
            if (args.Length == 0)
            {
                return HelpCommand.Execute(name);
            }

            return LoadLevel(args[0]);
        }

        private static ConsoleCommandResult LoadLevel(string sceneName)
        {
            try
            {
                SceneManager.LoadScene(sceneName, LoadSceneMode.Single);
            }
            catch
            {
                return ConsoleCommandResult.Failed($"Failed to load {sceneName}.");
            }

            Scene scene = SceneManager.GetSceneByName(sceneName);
            if (scene.IsValid() && scene.isLoaded)
            {
                // Assume success if we had to load the scene we were already in
                return ConsoleCommandResult.Succeeded($"Success loading {sceneName}.");
            }

            return ConsoleCommandResult.Failed(
                $"Failed to load {sceneName}. Are you sure it's in the list of levels in Build Settings?");
        }
    }
}