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"

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

    Public Enum DateConstraint
        Today
        Tomorrow
        Yesterday
        Last7Days
        CurrentMonth
        LastMonth
        CurrentYear
        LastYear
        Undefined
    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 RunWithDataTable(pDatatable As DataTable) As SearchResult
        Return RunWithDataTable(pDatatable, "Suche")
    End Function

    Public Function RunWithDataTable(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(pDatatable.Rows.Count)
    End Function

    Public Async Function RunWithSearchTerm(pSearchTerm As String) As Task(Of SearchResult)
        Return Await RunWithSearchTerm(pSearchTerm, Nothing, Nothing, Nothing)
    End Function

    Public Async Function RunWithSearchTerm(pSearchTerm As String, pSearchTitle As String) As Task(Of SearchResult)
        Return Await RunWithSearchTerm(pSearchTerm, Nothing, Nothing, pSearchTitle)
    End Function

    Public Async Function RunWithSearchTerm(pSearchTerm As String, pDateFrom As Date, pDateTo As Date) As Task(Of SearchResult)
        Return Await RunWithSearchTerm(pSearchTerm, pDateFrom, pDateTo, Nothing)
    End Function

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

        Dim oSearchTerm = pSearchTerm
        Dim oWindowTitle = GetResultWindowString(pSearchTerm, pSearchTitle)
        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)
            Dim oRowCount = oDTDocResult.Rows.Count
            If oRowCount > 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
                'AddHandler oForm.NeedsRefresh, AddressOf Form_NeedsRefresh
                AddHandler oForm.FormClosed, AddressOf Form_Closed

                oForm.Show()

                Return New SearchResult(oRowCount)
            Else
                Return New SearchResult(oRowCount)

            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, pWindowTitle As String) As String
        If pWindowTitle IsNot Nothing Then
            Return pWindowTitle
        End If

        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)
        _ActiveDateConstraint = DateConstraintToConstant(pConstraint)
    End Sub

    Public Function DateConstraintToConstant(pConstraint As DateConstraint) As String
        Select Case pConstraint
            Case DateConstraint.Today
                Return CREATED_TODAY

            Case DateConstraint.Yesterday
                Return CREATED_YESTERDAY

            Case DateConstraint.Tomorrow
                Return CREATED_TOMORROW

            Case DateConstraint.Last7Days
                Return CREATED_LAST_7_DAYS

            Case DateConstraint.CurrentMonth
                Return CREATED_MONTH_CURR

            Case DateConstraint.LastMonth
                Return CREATED_MONTH_LAST

            Case DateConstraint.CurrentYear
                Return CREATED_YEAR_CURRENT

            Case DateConstraint.LastYear
                Return CREATED_YEAR_LAST

            Case Else
                Return String.Empty

        End Select
    End Function
    Public Function ConstantToDateConstraint(pConstant As String) As DateConstraint
        Select Case pConstant
            Case CREATED_TODAY
                Return DateConstraint.Today
            Case CREATED_YESTERDAY
                Return DateConstraint.Yesterday
            Case CREATED_TOMORROW
                Return DateConstraint.Tomorrow
            Case CREATED_LAST_7_DAYS
                Return DateConstraint.Last7Days
            Case CREATED_MONTH_CURR
                Return DateConstraint.CurrentMonth
            Case CREATED_MONTH_LAST
                Return DateConstraint.LastMonth
            Case CREATED_YEAR_CURRENT
                Return DateConstraint.CurrentYear
            Case CREATED_YEAR_LAST
                Return DateConstraint.LastYear
            Case Else
                Return DateConstraint.Undefined
        End Select
    End Function

    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 = True
        Public Count As Integer = 0
        Public ErrorMessage As String = String.Empty

        ''' <summary>
        ''' Returns a positive Search Result
        ''' </summary>
        Public Sub New(pCountResults As Integer)
            Count = pCountResults
        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