using Cosmos.Debug.Kernel;
using Cosmos.HAL.BlockDevice;
using Cosmos.System.FileSystem;
using Cosmos.System.FileSystem.FAT;
using Cosmos.System.FileSystem.Listing;
using Cosmos.System.FileSystem.VFS;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Text;

namespace Cosmos.System.Tests
{
    class VFSManagerTest
    {

        [SetUp]
        public void Setup()
        {
            DebuggerFactory.WriteToConsole = true;
            var xDevice = new TestBlockDevice();
            var xPartition = new Partition(xDevice, 0, xDevice.BlockCount);
            BlockDevice.Devices.Clear();
            BlockDevice.Devices.Add(xPartition);
            VFSManager.RegisterVFS(new CosmosVFS(), true);
        }

        [Test]
        public void Test_Disk_Manager()
        {
            const string root = @"0:\";
            long initialSize = VFSManager.GetTotalSize(root);
            VFSManager.Format(root, "", true);
            Assert.AreEqual(initialSize, VFSManager.GetAvailableFreeSpace(root));
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.CreateFile(root + "\\test.txt");
            Assert.IsNotNull(VFSManager.GetFile(root + "\\test.txt"));
        }

        [Test]
        public void Test_Disk_Manager_Reformating()
        {
            const string root = @"0:\";
            long initialSize = VFSManager.GetTotalSize(root);
            VFSManager.Format(root, "", true);
            Assert.AreEqual(initialSize, VFSManager.GetAvailableFreeSpace(root));
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.CreateFile(root + "\\test.txt");
            VFSManager.CreateFile(root + "\\test1.txt");
            VFSManager.CreateFile(root + "\\test2.txt");
            VFSManager.CreateFile(root + "\\test3.txt");
            VFSManager.CreateFile(root + "\\test4.txt");
            VFSManager.CreateDirectory(root + "\\SubDir");
            VFSManager.CreateFile(root + "\\SubDir\\file.txt");
            Assert.IsNotNull(VFSManager.GetFile(root + "\\SubDir\\file.txt"));
            List<DirectoryEntry> lists = VFSManager.GetDirectoryListing(root);
            Assert.AreEqual(6, lists.Count);
            Assert.AreEqual(DirectoryEntryTypeEnum.File, lists[0].mEntryType);
            Assert.AreEqual(DirectoryEntryTypeEnum.Directory, lists[5].mEntryType);
            VFSManager.Format(root, "", true);
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.CreateDirectory(root + "\\dir");
            VFSManager.CreateFile(root + "\\newfile.txt");
            Assert.IsNotNull(VFSManager.GetFile(root + "\\newfile.txt"));
            Assert.AreEqual(2, VFSManager.GetDirectoryListing(root).Count);
        }

        [Test]
        public void Test_Disk_Manager_Reformating_First_Directories()
        {
            const string root = @"0:\";
            long initialSize = VFSManager.GetTotalSize(root);
            VFSManager.Format(root, "", true);
            Assert.AreEqual(initialSize, VFSManager.GetAvailableFreeSpace(root));
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.CreateDirectory(root + "\\SubDir");
            VFSManager.CreateFile(root + "\\SubDir\\filet.txt");
            Assert.IsNotNull(VFSManager.GetFile(root + "\\SubDir\\filet.txt"));
            Assert.AreEqual(1, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.Format(root, "", true);
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root).Count);
            VFSManager.CreateDirectory(root + "\\dir");
            Assert.AreEqual(1, VFSManager.GetDirectoryListing(root).Count);
            Assert.AreEqual(0, VFSManager.GetDirectoryListing(root + "\\dir").Count);
        }
    }
}