' Gambas module file

Private $sRoot As String
Private $sComponent As String
Private $bVerbose As Boolean

Private Sub PrintError(sErr As String)

  Error File.Name(Args[0]); ": error: "; sErr
  Quit 1

End

Private Sub PrintMessage(sMsg As String)

  If Not $bVerbose Then Return
  Error sMsg

End

Public Sub Main()
  
  Dim iInd As Integer, aSources As New String[]
  Dim sArg, sRec As String, aRec As String[]
  Dim sPath As String
  Dim hOut As File
  Dim bOnlySources As Boolean
  Dim sMsg As String

  $sRoot = System.Path
  
  For iInd = 1 To Args.Max
    Select Case Args[iInd]
      Case "-h", "--help"
        Print File.Load("usage")
        Quit
      Case "-V", "--version"
        Print Application.Version
        Quit
      Case "-L", "--license"
        Print File.Load("license")
        Quit
      Case "-v", "--verbose"
        $bVerbose = True
      Case "-r", "--root"
        $sRoot = Args[iInd + 1]
        If Not $sRoot Then PrintError(Args[iInd] & " requires an argument")
        Inc iInd
      Case "-c", "--component"
        $sComponent = Args[iInd + 1]
        If Not $sComponent Then PrintError(Args[iInd] & " requires an argument")
        Inc iInd
      Case "--"
        bOnlySources = True
      Default
        If Not bOnlySources Then
          If Args[iInd] Begins "-" Then
            PrintError("unknown option: " & Args[iInd])
          Endif
        Endif
        aSources.Add(Args[iInd])
    End Select
  Next
  
  If aSources.Count = 0 Then aSources.Add(".")

  If $sComponent Then
    sPath = $sRoot &/ "share/gambas" & System.Version &/ "info" &/ $sComponent & ".help"
    PrintMessage("Output to " & sPath)
    hOut = Open sPath For Create
  Else
    hOut = File.Out
  Endif

  For Each sArg In aSources
    If Left(sArg) <> "/" Then
      If sArg = "." Then 
        sArg = Application.Dir
      Else
        sArg = Application.Dir &/ sArg
      Endif
    Endif
    If IsDir(sArg) Then
      aRec = RDir(sArg, "*.{c,cc,cpp}")
      For Each sRec In aRec
        OneFile(sArg &/ sRec, hOut)
      Next
    Else
      OneFile(sArg, hOut)
    Endif
  Next
  
  If $sComponent Then
    Close #hOut
    If Stat(sPath).Size = 0 Then 
      PrintMessage("Removing void data file")
      Try Kill sPath
    Endif
  Endif
  
Catch
  
  sMsg = Error.Text & ": " & Error.Backtrace.Join(" ")
  Output To Default
  PrintError(sMsg)
  
End

Private Sub AddHelp(cHelp As Collection, sClass As String, sSymbol As String, sHelp As String)

  Dim cCol As Collection
  
  PrintMessage("AddHelp: " & sClass & "." & sSymbol)
  
  cCol = cHelp[sClass]
  If Not cCol Then
    cCol = New Collection
    cHelp[sClass] = cCol
  Endif
  
  cCol[sSymbol] = sHelp
  
End


Private Sub OneFile(sPath As String, hOut As File)
  
  Dim hFile As File
  Dim sLine As String
  Dim aHelp As New String[]
  Dim bInsideComments As Boolean
  Dim sHelp As String
  Dim iPos As Integer
  Dim bInsideDesc As Boolean
  Dim sMacro As String
  Dim iPos2 As Integer
  Dim aArg As String[]
  Dim sClass As String
  Dim sSymbol As String
  Dim cHelp As Collection
  Dim sDeclareClass As String
  Dim cCol As Variant
  Dim aClass As String[]
  Dim sImpl As String

  PrintMessage("Processing " & sPath & "...")
  hFile = Open sPath For Input
  
  cHelp = New Collection
  
  For Each sLine In hFile.Lines
    
    sLine = Trim(sLine)
    If Not sLine Then Continue
    
    'PrintMessage(sLine)
    
    If sLine Begins "/// " Then
      
      aHelp.Add(Mid$(sLine, 5))
      Continue
      
    Else If sLine = "/**G" Or If sLine = "/**" Then
      
      bInsideComments = True
      Continue
    
    Else If sLine Begins "/** " Then
      
      aHelp.Add(Mid$(sLine, 5))
      bInsideComments = True
      Continue
    
    Else If bInsideComments Then
    
      If RTrim(sLine) Ends "*/" Then
        
        bInsideComments = False
        Continue
        
      Else
        
        While Left(sLine) = "*"
          sLine = Mid$(sLine, 2)
        Wend
        If Left(sLine) = " " Then sLine = Mid$(sLine, 2)
        aHelp.Add(sLine)
        Continue
        
      Endif
      
    Endif
    
    If aHelp.Count Then
      
      sHelp = Trim(aHelp[0])
      If Len(sHelp) >= 3 And If sHelp Begins "[" And If sHelp Ends "]" Then
        sHelp = Mid$(sHelp, 2, -1)
        iPos = InStr(sHelp, ".")
        If iPos = 0 Then
          sClass = sHelp
          sSymbol = ""
        Else
          sClass = Left$(sHelp, iPos - 1)
          sSymbol = Mid$(sHelp, iPos + 1)
        Endif
        
        aHelp.Remove(0)
        AddHelp(cHelp, sClass, sSymbol, aHelp.Join("\n"))
        sHelp = ""
      Else
        sHelp = Trim(aHelp.Join("\n"))
      Endif
      aHelp.Clear
      
    Endif
    
    If sHelp Then
      If sLine Begins "BEGIN_METHOD" Or If sLine Begins "BEGIN_PROPERTY" Then
        
        iPos = InStr(sLine, "(")
        If iPos = 0 Then Continue
        sLine = Mid$(sLine, iPos + 1)
        iPos = InStr(sLine, ",")
        If iPos = 0 Then iPos = InStr(sLine, ")")
        If iPos = 0 Then Continue
        sLine = Left(sLine, iPos - 1)
        
        AddHelp(cHelp, "@", sLine, sHelp)
        sHelp = ""
        Continue
        
      Endif
    Endif
    
    If sLine Begins "GB_DECLARE" Then
      bInsideDesc = True
      Try sDeclareClass = Scan(sLine, "GB_DECLARE*(\"*\"*")[1]
      If Error Then PrintError("Missing class name in GB_DECLARE macro: " & sLine)
      Continue
    Endif
    
    If bInsideDesc Then
      
      If sLine Begins "GB_END_DECLARE" Then
        bInsideDesc = False
        Continue
      Endif
      
      
      iPos = InStr(sLine, "(")
      If iPos = 0 Then Continue
      sMacro = Left(sLine, iPos - 1)
      
      If sMacro Not Begins "GB_" Then Continue
      If InStr(sMacro, "_CONSTANT") = 0 And If InStr(sMacro, "_PROPERTY") = 0 And If InStr(sMacro, "_METHOD") = 0 Then Continue
      
      iPos2 = InStr(sLine, ")", iPos + 1)
      If iPos2 = 0 Then Continue
      
      aArg = Split(Mid$(sLine, iPos + 1, iPos2 - iPos - 1), ",", Chr$(34))
      sSymbol = Trim(aArg[0])
      Try sImpl = Trim(aArg[2])
        
      If sHelp Then
        
        AddHelp(cHelp, sDeclareClass, sSymbol, sHelp)
        sHelp = ""
        
      Else
        
        If InStr(sMacro, "_CONSTANT") Then Continue
        If InStr(sMacro, "_SELF") Then Continue
        Try sHelp = cHelp["@"][sImpl]
        If sHelp Then
          AddHelp(cHelp, sDeclareClass, sSymbol, sHelp)
          sHelp = ""
        Endif
        
      Endif 
        
    Endif
    
  Next
  
  Close #hFile
  
  ' Make class list
  
  aClass = New String[]
  For Each cCol In cHelp
    If cHelp.Key = "@" Then Continue
    aClass.Add(cHelp.Key)
  Next
  aClass.Sort(gb.IgnoreCase)
  
  ' Generate help
  
  For Each sClass In aClass
    
    cCol = cHelp[sClass]
    If cCol.Count = 0 Then Continue
    
    Print #hOut, "#"; sClass
    
    For Each sHelp In cCol
      Print #hOut, cCol.Key
      Print #hOut, "'"; Split(sHelp, "\n").Join("\n'")
    Next
    
  Next
  
End

' Private Function Extract(hFile As File) As String[]
' 
'   Dim hNameFn As New RegExp, hNameInline As New RegExp
'   Dim sLine As String, sInline As String
'   Dim aRes As New String[]
'   Dim bRecord As Boolean
' 
'   hNameFn.Compile("^BEGIN_.*\\(([^,)]+).*")
'   hNameInline.Compile("/\\*\\*G (.+)$")
' 
'   For Each sLine In hFile.Lines
'     If sLine Match "^[\\t ]*\\*?\\*/$" Then
'       If sInline Then
'         aRes.Add("G " & sInline)
'         sInline = ""
'         bRecord = False
'       Endif
'       Continue
'     Endif
'     hNameFn.Exec(sLine)
'     If hNameFn.Offset <> -1 And If bRecord And If Not sInline Then
'       aRes.Add(hNameFn[1].Text)
'       bRecord = False
'     Endif
' 
'     If bRecord Then aRes.Add(RegExp.Replace(sLine, "^[\\t ]*\\*", "'"))
' 
'     If sLine Match "^/\\*\\*G$" Then
'       If bRecord Then aRes.Add("ERROR")
'       sInline = ""
'       bRecord = True
'     Endif
'     hNameInline.Exec(sLine)
'     If hNameInline.Offset <> -1 Then
'       If bRecord Then aRes.Add("ERROR")
'       sInline = LTrim$(hNameInline[1].Text)
'       bRecord = True
'     Endif
'   Next
'   If bRecord Then aRes.Add("ERROR")
'   Return aRes
' End
' 
' Private Function Translate(aSource As String[], sPath As String) As String[]
'   
'   Dim sLine As String, aRes As New String[]
' 
'   For Each sLine In aSource
'     If Not sLine Then Continue
'     If sLine = "ERROR" Or If sLine Begins "'" Then
'       aRes.Add(sLine)
'       Continue
'     Endif
'     If sLine Begins "G " Then ' Syntax-2?
'       aRes.Add(Right$(sLine, -2))
'       Continue
'     Endif
'     ' Syntax-1
'     aRes.Add(GetSyntax1(sLine, sPath))
'   Next
'   Return aRes
' End
' 
' Private Function GetSyntax1(sFunc As String, sPath As String) As String
'   
'   Dim hClassName As New RegExp, hFunction As New RegExp
'   Dim hFile As File, sLine, sClass As String
'   Dim aRes As New String[]
' 
'   hClassName.Compile("GB_DECLARE\\(\\\"([^\\\"]+).*")
'   hFunction.Compile("GB_[^(]+\\(\\\"([^\"]+)\\\".*" & sFunc & "\\W")
' 
'   hFile = Open sPath For Input
'   sClass = "ERROR"
'   For Each sLine In hFile.Lines
'     If Not sLine Then Continue
'     hClassName.Exec(sLine)
'     If hClassName.Offset <> -1 Then sClass = hClassName[1].Text
'     hFunction.Exec(sLine)
'     If hFunction.Offset <> -1 Then
'       If Not aRes.Count Then aRes.Add(sClass)
'       aRes.Add(hFunction[1].Text)
'     Endif
'   Next
'   Close #hFile
'   Return aRes.Join(" ")
' End
' 
' Public Sub MakeHelp(aSource As String[], hOut As File)
'   
'   Dim sLine, sCls, sSym As String
'   Dim cHelp As New Collection, aCurrent As New String[]
'   Dim cClass As Collection, aHelp, aSyn As String[]
'   Dim iInd As Integer
' 
'   Output To hOut
'   For Each sLine In aSource
'     If Not sLine Then Continue
'     If sLine Begins "'" Then
'       aCurrent.Add(sLine)
'     Else
'       With Scan(sLine, "* *")
'         If .Count = 0 Then ' <Class>
'           sCls = sLine
'           sSym = "#"
'         Else If .Count = 2 Then ' <Class> <Symbol-and-Synonym-List>
'           sCls = Trim$(.[0])
'           sSym = Trim$(.[1])
'         Endif
'         If Not cHelp[sCls] Then cHelp[sCls] = New Collection
'         cHelp[sCls][sSym] = aCurrent
'         aCurrent = New String[]
'       End With
'     Endif
'   Next
' 
'   For Each cClass In cHelp
'     Print "#"; cHelp.Key
'     aHelp = cClass["#"]
'     If aHelp Then Print aHelp.Join("\n")
'     For Each aHelp In cClass
'       If cClass.Key = "#" Then Continue
'       aSyn = Split(cClass.Key, " ")
'       Print aSyn[0]
'       If aHelp.Count Then Print aHelp.Join("\n")
'       For iInd = 1 To aSyn.Max
'         Print aSyn[iInd]
'         Print "' A synonym for";; aSyn[0]; "."
'       Next
'     Next
'   Next
'   Output To Default
' End