// Copyright | Raumgleiter AG | 2019 | All Rights Reserved

//***********************************************************************************************************************
//Headers

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

using Raumgleiter.BaseRGDK.Development;
using SFB;


//***********************************************************************************************************************

namespace Raumgleiter.BaseRGDK.UI
{
    /// <summary>
    /// A wrapper class for different file explorers
    /// </summary>
    public class NativeFileExplorer_Standalone : NativeFileExplorer
    {
        //Connections
        //[Header("Connections")]


        //Resources
        //[Header("Resources")]


        //Attributes
        //[Header("Attributes")]


        //Stats
        //[Header("Stats")]
        //protected bool IsSetUp = false;
        ExplorerCallback CurrentCallback;


        //Getter

        //Delegates


        //------------------------------------------------------------------------------------------------------------------
        //awake

        //------------------------------------------------------------------------------------------------------------------
        //start

        //------------------------------------------------------------------------------------------------------------------
        //setup

        //public void SetUp()
        //{
        //    IsSetUp = true;
        //}


        //------------------------------------------------------------------------------------------------------------------
        //destroy

        //***********************************************************************************************************************
        //update

        //***********************************************************************************************************************
        //refresh

        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //events

        protected void Callback(string[] paths)
        {
            if(CurrentCallback == null)
            {
                return;
            }

            CurrentCallback(paths.ToList());
        }


        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //private

        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //protected

        protected ExtensionFilter[] ConvertFilter(string[] fileTypeFilter)
        {
            //Has any entries?
            if(fileTypeFilter == null || fileTypeFilter.Length == 0)
            {
                return new ExtensionFilter[] {
                new ExtensionFilter(
                    "Alle Dateien",
                    new string[]{ "*" }) };
            }

            //Remove . before extension
            string[] FileTypeFilter = fileTypeFilter;
            for (int i = 0; i < FileTypeFilter.Length; i++)
            {
                if (FileTypeFilter[i].Length > 1 && FileTypeFilter[i].Substring(0, 1) == ".")
                {

                }
                FileTypeFilter[i] = FileTypeFilter[i].Substring(1);
            }

            //Convert to filter
            return new ExtensionFilter[]
            {
                new ExtensionFilter(
                    "Benutzerdefinierte Dateien",
                    fileTypeFilter)
            };
        }


        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //internal

        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //public

        public override void Open(
            ExplorerMode mode,
            ExplorerCallback callback,
            string startPath = "",
            string[] fileTypeFilter = null,
            string title = "",
            bool displayHiddenFiles = false)
        {
            //Get Data
            CurrentCallback = callback;

            //Switch on mode
            switch (mode)
            {
                case ExplorerMode.Directory:
                    //Open
                    StandaloneFileBrowser.OpenFolderPanelAsync(
                        title: title,
                        directory: startPath,
                        multiselect: false,
                        cb: Callback);
                    break;

                case ExplorerMode.OneFile:
                case ExplorerMode.MultipleFiles:
                    //Open
                    StandaloneFileBrowser.OpenFilePanelAsync(
                        title: title,
                        directory: startPath,
                        extensions: ConvertFilter(fileTypeFilter),
                        multiselect: mode == ExplorerMode.MultipleFiles,
                        cb: Callback);
                    break;

                default:
                    DBug.NOT_YET_IMPLEMENTED();
                    break;
            }

        }


        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //public static

        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

        //***********************************************************************************************************************
        //getter, setter

        //------------------------------------------------------------------------------------------------------------------
        //------------------------------------------------------------------------------------------------------------------

    }

}