//////////////////////////////////////////////////////////////
// Copyright file = "OpenBlender.cs"                        //
// Copyright (c) 2020 All Rights Reserved                   //
// Authors: Francine Rotzetter / Robin Dittli               //
// Date: 21/01/2020                                         //
// Summary: Class representing an initialized process       //
//////////////////////////////////////////////////////////////
/*
            .            .                     .
                  _        .                          .            (
                 (_)        .       .                                     .
  .        ____.--^.
   .      /:  /    |                               +           .         .
         /:  `--=--'   .                                                .
        /: __[\==`-.___          *           .
       /__|\ _~~~~~~   ~~--..__            .             .
       \   \|::::|-----.....___|~--.                                 .
        \ _\_~~~~~-----:|:::______//---...___
    .   [\  \  __  --     \       ~  \_      ~~~===------==-...____
        [============================================================-
        /         __/__   --  /__    --       /____....----''''~~~~      .
  *    /  /   ==           ____....=---='''~~~~ .
      /____....--=-''':~~~~                      .                .
      .       ~--~         
                     .                                   .           .
                          .                      .             +
        .     +              .                                       <=>
                                               .                .      .
   .                 *                 .                *                ` -
*/

using System;
using System.Diagnostics;


namespace THUMM
{
    //Runs Blender through command line 
    //Provides Blender with arguments (expandable in future)
    //Runs python files within arguments
    // 
    public class OpenBlender
    {
        //Fields
        //Create new Process which opens cmd.exe
        private Process openBlender;

        //Assigns start directory to process
        private string changeDir;

        //Backing Field
        private string _blenderInstallFolder;

        //BlenderSpplication Folder
        public string BlenderInstallFolder
        {
            get { return _blenderInstallFolder;  }
            set { _blenderInstallFolder = value; }
        }
        


        //constructor
        public OpenBlender()
        {
            changeDir = "C:";
        }




        //Create and start process
        public void OpeningBlender()
        {
            //Create Process
            openBlender = new Process();

            SetUpStartInfo();

            //Enable Process.Exited functionality
            openBlender.EnableRaisingEvents = true;

            //Starts the Process
            try
            {
                openBlender.Start();
            }
            catch (BlenderCMDExceptions e)
            {
                Console.WriteLine("Blender failed to start: " + e);
                return;
            }

            //Wait for cmd to close
            try
            {
                //In case delay is needed upon exiting the cmd.exe
                openBlender.WaitForExit(); 
            }
            catch (BlenderCMDExceptions e)
            {
                Console.WriteLine("Blender encountered a problem: " + e);
                return;
            }

            //Set up callback
            //Create Event handler for on Exit of the program 
            //That way we can execute another function if needed
            openBlender.Exited += new EventHandler(openedBlender_Exited);

        }
        
        //SetUp StartInfo
        //Apply arguments
        //!!!Not ideal coupling with AddPythonScript -> Put later in struct!
        private void SetUpStartInfo()
        {
            ProcessStartInfo startInfo = new ProcessStartInfo();

            startInfo.FileName = @"cmd.exe";
            startInfo.WorkingDirectory = changeDir;

            //Supply arguments to cmd.exe
            //Execute certain commands in order
            startInfo.Arguments =
                "/C " +
                @"cd " + LocalPaths.BlenderInstallFolderPath  +
                "&&" +
                "blender -P " +
                LocalPaths.PyFolderPath + @"\" + AddPythonScript.PyFileName;

            Console.WriteLine(startInfo.Arguments);
            //Apply StartInfos to Process
            openBlender.StartInfo = startInfo;
        }

        //Commence with next task if needed (not yet implemented)
        private void openedBlender_Exited(object sender, EventArgs e)
        {
            //MessageBox.Show("cmd.exe is closed");
        }
    }
}