Imports DigitalData.GUIs.Common
Imports DigitalData.Modules.Base
Imports DigitalData.Modules.Logging
Imports DigitalData.Modules.ZooFlow
Imports System.Threading.Tasks

Public Class SearchRunner
    Inherits BaseClass

    Private Const SEARCH_FACT_DATE_DEFAULT As String = "ADDED_WHEN"

    Private Const CREATED_TOMORROW As String = "TOMORROW"
    Private Const CREATED_TODAY As String = "ECM_CREATED_TODAY"
    Private Const CREATED_YESTERDAY As String = "ECM_CREATED_YESTERDAY"
    Private Const CREATED_LAST_7_DAYS As String = "ECM_CREATED_LAST7DAYS"
    Private Const CREATED_YEAR_CURRENT As String = "ECM_CREATED_YEAR_CURRENT"
    Private Const CREATED_YEAR_LAST As String = "ECM_CREATED_YEAR_LAST"
    Private Const CREATED_MONTH_CURR As String = "ECM_CREATED_MONTH_CURRENT"
    Private Const CREATED_MONTH_LAST As String = "ECM_CREATED_MONTH_LAST"

    Public Enum DateConstraint
        Today
        Tomorrow
        Yesterday
        Last7Days
        CurrentMonth
        LastMonth
        CurrentYear
        LastYear
    End Enum

    Public Event NeedsRefresh As EventHandler(Of Integer)
    Public Event Closed As EventHandler(Of Integer)

    Private Property _ActiveDateConstraint As String = String.Empty
    Public ReadOnly Property ActiveDateConstraint As String
        Get
            Return _ActiveDateConstraint
        End Get
    End Property

    Private _ActiveDateAttribute As String = SEARCH_FACT_DATE_DEFAULT
    Public ReadOnly Property ActiveDateAttribute As String
        Get
            Return _ActiveDateAttribute
        End Get
    End Property

    Public Property BaseSearchSQL As String
    Public Property ExplicitDate As Boolean = False

    Private ReadOnly Environment As Environment
    Private ReadOnly SearchTitle As String

    Public Sub New(pLogConfig As LogConfig, pEnvironment As Environment, pSearchTitle As String)
        MyBase.New(pLogConfig)
        Environment = pEnvironment
        SearchTitle = pSearchTitle
    End Sub

    Public Function Run(pDatatable As DataTable) As SearchResult
        Return Run(pDatatable, "Suche")
    End Function

    Public Function Run(pDatatable As DataTable, pTitle As String) As SearchResult
        Dim oParams = GetParams(pTitle)
        oParams.Results.Add(New DocumentResultList.DocumentResult() With {
            .Title = pTitle,
            .Datatable = pDatatable
        })

        If pDatatable.Rows.Count = 1 Then
            oParams.ShowFileList = False
        End If

        Dim oForm As New frmDocumentResultList(My.LogConfig, Environment, oParams)

        ' TODO: Implement, not needed right now
        'AddHandler oForm.NeedsRefresh, AddressOf Form_NeedsRefresh
        AddHandler oForm.FormClosed, AddressOf Form_Closed

        oForm.Show()

        Return New SearchResult()
    End Function

    Public Async Function Run(pSearchTerm As String) As Task(Of SearchResult)
        Dim oWindowTitle = GetResultWindowString(pSearchTerm)
        Return Await Run(pSearchTerm, Nothing, Nothing)
    End Function


    Public Async Function Run(pSearchTerm As String, pDateFrom As Date, pDateTo As Date) As Threading.Tasks.Task(Of SearchResult)
        If pDateFrom.Equals(Date.MinValue) = False Then
            ExplicitDate = True
        End If

        Dim oSearchTerm = pSearchTerm
        Dim oWindowTitle = GetResultWindowString(pSearchTerm)
        Dim oParams = GetParams(oWindowTitle)
        Dim oDateConstraint = $"{_ActiveDateAttribute}~{_ActiveDateConstraint}"

        If ExplicitDate Then
            Dim oDate2 As Date
            If pDateTo.Equals(Date.MinValue) Then
                oDate2 = pDateTo
            Else
                oDate2 = pDateFrom
            End If
            Dim oProc = $"EXEC PRIDB_SEARCH_ADD_USR_DATE {My.Application.User.UserId},'{pDateFrom}','{oDate2}'"
            If Await My.Database.ExecuteNonQueryIDBAsync(oProc) = True Then
                oDateConstraint = $"{_ActiveDateAttribute}~DATEPART"
            End If
        End If

        Dim oSQL = $"EXEC PRIDB_SEARCH_TEXT_GET_RESULTS {My.Application.User.UserId},'{oSearchTerm}','{oDateConstraint}'"

        If Await My.Database.ExecuteNonQueryIDBAsync(oSQL) = True Then
            Dim oDTDocResult = Await My.Database.GetDatatableIDBAsync(BaseSearchSQL)
            If oDTDocResult.Rows.Count > 0 Then
                oParams.Results.Add(New DocumentResultList.DocumentResult() With {
                    .Title = SearchTitle,
                    .Datatable = oDTDocResult
                })

                If oDTDocResult.Rows.Count = 1 Then
                    oParams.ShowFileList = False
                End If

                Dim oForm As New frmDocumentResultList(My.LogConfig, Environment, oParams)

                ' TODO: Implement, not needed right now
                'AddHandler oForm.NeedsRefresh, AddressOf Form_NeedsRefresh
                AddHandler oForm.FormClosed, AddressOf Form_Closed

                oForm.Show()

                Return New SearchResult()
            Else
                Return New SearchResult("No Results")

            End If
        Else
            Return New SearchResult("Error in FlowSearch - Check Your log")

        End If
    End Function

    Private Sub Form_Closed(sender As Object, e As EventArgs)
        RaiseEvent Closed(sender, 0)
    End Sub

    Private Function GetParams(pWindowTitle As String) As DocumentResultList.Params
        Dim oParams = New DocumentResultList.Params() With {
            .WindowGuid = SearchTitle,
            .WindowTitle = pWindowTitle,
            .OperationModeOverride = Modules.ZooFlow.Constants.OperationMode.ZooFlow,
            .ProfileGuid = 35452,
            .ColumnNames = New DocumentResultList.ColumnNames With {
                .ObjectIdColumn = "DocID"
            },
            .ShowBackNavigation = False
        }
        Return oParams
    End Function

    Private Function GetResultWindowString(SearchContent As String) As String
        If SearchContent <> String.Empty Then
            If My.Application.User.Language = State.UserState.LANG_DE_DE Then

                Return $"Suche Nach '{SearchContent}'"
            Else
                Return $"Search For '{SearchContent}'"
            End If
        Else
            If My.Application.User.Language = State.UserState.LANG_DE_DE Then
                Return $"Suche Datumsbegrenzt"
            Else
                Return $"Search via date"
            End If
        End If
    End Function

    Public Sub SetDateConstraint()
        _ActiveDateConstraint = String.Empty
    End Sub

    Public Sub SetDateConstraint(pConstraintName As String)
        _ActiveDateConstraint = pConstraintName
    End Sub

    Public Sub SetDateConstraint(pConstraint As DateConstraint)
        Select Case pConstraint
            Case DateConstraint.Today
                _ActiveDateConstraint = CREATED_TODAY

            Case DateConstraint.Yesterday
                _ActiveDateConstraint = CREATED_YESTERDAY

            Case DateConstraint.Tomorrow
                _ActiveDateConstraint = CREATED_TOMORROW

            Case DateConstraint.Last7Days
                _ActiveDateConstraint = CREATED_LAST_7_DAYS

            Case DateConstraint.CurrentMonth
                _ActiveDateConstraint = CREATED_MONTH_CURR

            Case DateConstraint.LastMonth
                _ActiveDateConstraint = CREATED_MONTH_LAST

            Case DateConstraint.CurrentYear
                _ActiveDateConstraint = CREATED_YEAR_CURRENT

            Case DateConstraint.LastYear
                _ActiveDateConstraint = CREATED_YEAR_LAST

            Case Else
                _ActiveDateAttribute = String.Empty

        End Select
    End Sub

    Public Sub SetDateAttribute(pAttributeName As String)
        _ActiveDateAttribute = pAttributeName
    End Sub

    Public Sub SetDateAttribute()
        _ActiveDateAttribute = SEARCH_FACT_DATE_DEFAULT
    End Sub

    Public Class SearchResult
        Public OK As Boolean
        Public ErrorMessage As String = String.Empty

        ''' <summary>
        ''' Returns a positive Search Result
        ''' </summary>
        Public Sub New()
            OK = True
        End Sub

        ''' <summary>
        ''' Returns a failed search result with an error message
        ''' </summary>
        ''' <param name="pMessage"></param>
        Public Sub New(pMessage As String)
            OK = False
            ErrorMessage = pMessage
        End Sub
    End Class
End Class