Imports System
Imports System.Reflection
Imports System.IO
Imports System.Text

Imports Codice.Client.Common
Imports Codice.Client.Commands
Imports Codice.Client.BaseCommands

Imports Codice.CM.Common

Namespace Codice.Client.GlassFS
    Friend Class FileCache
        Private mBasePath As String

        Friend Sub New()
            mBasePath = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), "filecache")
            If Not Directory.Exists(mBasePath) Then
                Directory.CreateDirectory(mBasePath)
            End If
        End Sub

        Public Function HashToHex(hash As String) As String
            Dim hexString As New StringBuilder(hash.Length)

            For i As Integer = 0 To hash.Length - 1
                Dim c As Char = CChar(hash(i))
                Dim b As Byte = CByte(c)
                hexString.Append(b.ToString("X2"))
            Next

            Return hexString.ToString()
        End Function

        Friend Function GetFile(repInfo As RepositoryInfo, revInfo As RevisionInfo, api As PlasticAPI) As String
            Dim hash As String = HashToHex(revInfo.Hash)

            Dim subdir As String = Path.Combine(mBasePath, String.Concat(hash(0), hash(1)))

            If Not Directory.Exists(subdir) Then
                Directory.CreateDirectory(subdir)
            End If

            Dim file__1 As String = Path.Combine(subdir, hash)

            If File.Exists(file__1) Then
                Return file__1
            End If

            api.GetFile(repInfo, revInfo, file__1)

            Return file__1
        End Function
    End Class
End Namespace