Imports System.Data.SqlClient
Imports System.Runtime.Serialization
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Language
Imports DigitalData.Modules.Logging

Public Class GlobalState
    Private ReadOnly _LogConfig As LogConfig
    Private ReadOnly _Logger As Logger
    Private ReadOnly _MSSQL_IDB As MSSQLServer
    Private ReadOnly _MSSQL_ECM As MSSQLServer

    Public Property ObjectStores As New List(Of ObjectStore)
    Public Property Connections As New List(Of DatabaseConnection)
    Public Property Doctypes As New List(Of Doctype)

    Public Property ClientConfig As New ClientConfiguration

    Public Property TableStore As New DataSet

    Public Sub New(LogConfig As LogConfig, MSSQL_IDB As MSSQLServer, MSSQL_ECM As MSSQLServer)
        _LogConfig = LogConfig
        _Logger = LogConfig.GetLogger()
        _MSSQL_IDB = MSSQL_IDB
        _MSSQL_ECM = MSSQL_ECM
    End Sub

    Public Function GetObjectStore(pName As String) As ObjectStore
        Return ObjectStores.
            Where(Function(store) store.Title.ToUpper = pName.ToUpper).
            FirstOrDefault()
    End Function

    Public Function GetConnection(pConnectionId As Long) As DatabaseConnection
        Return Connections.
            Where(Function(conn) conn.Id = pConnectionId).
            FirstOrDefault()
    End Function

    Public Function GetCachedTables() As List(Of String)
        Try
            Dim oTables As DataTableCollection = TableStore.Tables
            Dim oList As New List(Of String)

            For Each oTable As DataTable In oTables
                oList.Add(oTable.TableName)
            Next

            Return oList
        Catch ex As Exception
            _Logger.Error(ex)
            Return New List(Of String)
        End Try
    End Function

    Public Function GetConnectionString(pConnectionId As Long) As String
        Dim oConnection = GetConnection(pConnectionId)
        Dim oBuilder As New SqlConnectionStringBuilder With {
            .DataSource = oConnection.Server,
            .InitialCatalog = oConnection.Database,
            .UserID = oConnection.Username,
            .Password = oConnection.Password
        }

        Return MSSQLServer.DecryptConnectionString(oBuilder.ToString)
    End Function

    Public Sub LoadDoctypes()
        _Logger.Info("Loading Doctypes")

        Try
            Dim oSQL As String = "SELECT * FROM VWIDB_DOCTYPE_HANDLING"
            Dim oTable As DataTable = _MSSQL_IDB.GetDatatable(oSQL)

            _Logger.Info("Found [{0}] Document Types", oTable.Rows.Count)

            Dim oDocTypes As New List(Of Doctype)

            For Each oRow As DataRow In oTable.Rows
                Dim oDoctype As New Doctype With {
                    .Name = oRow.Item("DOCTYPE"),
                    .FileChangedAction = oRow.Item("CHANGED_HANDLING")
                }

                _Logger.Info("New Doctype [{0}]", oDoctype.Name)
                oDocTypes.Add(oDoctype)
            Next

            Doctypes = oDocTypes
        Catch ex As Exception
            _Logger.Error(ex)
        End Try
    End Sub


    Public Sub LoadObjectStores()
        _Logger.Info("Loading Object Stores")
        Try
            Dim oSQL As String = "SELECT * FROM VWIDB_OBJECT_STORE"
            Dim oTable As DataTable = _MSSQL_IDB.GetDatatable(oSQL)

            _Logger.Info("Found [{0}] Object Stores", oTable.Rows.Count)

            Dim oObjectStores As New List(Of ObjectStore)

            For Each oRow As DataRow In oTable.Rows
                Dim oStore As New ObjectStore() With {
                    .Id = oRow.Item("GUID"),
                    .IsArchive = oRow.Item("Archive"),
                    .Path = oRow.Item("REL_PATH"),
                    .Title = oRow.Item("Objectstore")
                }
                _Logger.Info("New Object Store [{0}]", oStore.Title)
                oObjectStores.Add(oStore)
            Next

            ObjectStores = oObjectStores
        Catch ex As Exception
            _Logger.Error(ex)
        End Try
    End Sub

    Public Sub LoadConnections()
        _Logger.Info("Loading Database Connections")
        Try
            Dim oSQL As String = "SELECT * FROM TBDD_CONNECTION"
            Dim oTable As DataTable = _MSSQL_ECM.GetDatatable(oSQL)

            _Logger.Info("Found [{0}] Connections", oTable.Rows.Count)

            Dim oConnections As New List(Of DatabaseConnection)

            For Each oRow As DataRow In oTable.Rows
                Dim oConnection As New DatabaseConnection() With {
                    .Id = oRow.ItemEx(Of Integer)("GUID"),
                    .Active = oRow.ItemEx(Of Boolean)("AKTIV"),
                    .Database = oRow.ItemEx(Of String)("DATENBANK"),
                    .Title = oRow.ItemEx(Of String)("BEZEICHNUNG"),
                    .Password = oRow.ItemEx(Of String)("PASSWORD"),
                    .Provider = oRow.ItemEx(Of String)("SQL_PROVIDER"),
                    .Server = oRow.ItemEx(Of String)("SERVER"),
                    .Username = oRow.ItemEx(Of String)("USERNAME")
                }
                _Logger.Info("New Connection [{0}]", oConnection.Title)
                oConnections.Add(oConnection)
            Next

            Connections = oConnections
        Catch ex As Exception
            _Logger.Error(ex)
        End Try
    End Sub

    Public Sub LoadClientConfig(pConfig As Config)
        _Logger.Info("Loading Client Config")
        _Logger.Debug("ForceDirectDatabaseAccess: {0}", pConfig.ClientConfig.ForceDirectDatabaseAccess)
        ClientConfig.ForceDirectDatabaseAccess = pConfig.ClientConfig.ForceDirectDatabaseAccess
        ClientConfig.DocumentTypes = Doctypes
        ClientConfig.ConnectionStringECM = _MSSQL_ECM.CurrentConnectionString
        ClientConfig.ConnectionStringIDB = _MSSQL_IDB.CurrentConnectionString
    End Sub

    Public Class ObjectStore
        Public Id As Long
        Public Title As String
        Public IsArchive As Boolean
        Public Path As String
    End Class

    Public Class DatabaseConnection
        Public Id As Long
        Public Title As String
        Public Provider As String
        Public Server As String
        Public Database As String
        Public Username As String
        Public Password As String
        Public Active As Boolean
    End Class


    Public Class ClientConfiguration
        Public Property ForceDirectDatabaseAccess As Boolean = False
        Public Property DocumentTypes As New List(Of Doctype)

        Public Property ConnectionStringECM As String
        Public Property ConnectionStringIDB As String
    End Class

    <DataContract>
    Public Class Doctype
        <DataMember>
        Public Property Name As String
        <DataMember>
        Public Property FileChangedAction As String
    End Class

End Class