/*
-----------------------------------------------------------------------------
This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com

Copyright (c) 2021 I-maginer

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt

-----------------------------------------------------------------------------
*/

var sDefaultFilesPath = "%documents%";;
var sConfigPath = "tmp/fileslist/";;

struct FLDLUnit = [
  FLDLU_element                   : VUIListElement,
  FLDLU_sLabel                    : S,
  FLDLU_sValue                    : S,
  FLDLU_iDepth                    : I,
  FLDLU_lChildren                 : [FLDLUnit r1]

  ] mkFLDLUnit;;


struct PlugOnlineFile = [
  PFL_instance                : PInstance,
  PFL_sPath                   : S,
  PFL_sFilesMask              : S,
  PFL_sTitle                  : S,
  PFL_sConfPath               : S,
  PFL_bEditServer             : I,
  PFL_dlgstr                  : VUIDlg,
  PFL_liststr                 : VUIList,
  PFL_editstr                 : VUIelement,
  PFL_lList                   : [FLDLUnit r1],
  PFL_selected                : VUIListElement,
  PFL_sPos                    : S,
  PFL_iOpacity                : I,
  PFL_iFilePos                : I
  
  ] mkPlugOnlineFile;;


proto updateDialogSize = fun [PlugOnlineFile] I;;
proto addElement = fun [PlugOnlineFile FLDLUnit S S I] FLDLUnit;;
proto clearList = fun [PlugOnlineFile] I;;
proto createDialog = fun [S PlugOnlineFile] I;;


fun clearList(obstr)=
  VUIclearList obstr.PFL_liststr;
  set obstr.PFL_lList = nil;
  set obstr.PFL_iFilePos = -1;
  0;;


fun isFileInList(l, file)=
  if (l == nil) then 0 else
  (
    let l -> [f n] in
    let getPathFile f "" -> [_ fname] in
    if (!strcmp fname file) then
      1
    else
      isFileInList n file;
  );;


fun fillLocalFiles(obstr)=  
  clearList obstr;
  let getFilesFromDir obstr.PFL_sPath obstr.PFL_sFilesMask::nil -> lfiles in
    while (lfiles != nil) do
    (
      let hd lfiles -> file in
      let getPathFile file "" -> [_ fname] in
        addElement obstr nil fname file 0;
      set lfiles = tl lfiles;
    );
      
  if (obstr.PFL_lList == nil) then nil else
    updateDialogSize obstr;
  0;;


fun cbRefresh(inst, from, action, param, reply, obstr)=
    fillLocalFiles obstr;
  0;;


fun cbSetPath(inst, from, action, param, reply, obstr)=
  set obstr.PFL_sPath = param;    
  _storepack obstr.PFL_sPath obstr.PFL_sConfPath;
  fillLocalFiles obstr;
  0;;


/////////// INTERACE /////////////
fun getWidth(obstr, lunits, font)=
  let 350 -> width in
  let [10 0] -> [ow oh] in
  let hd lunits -> unitstr in
  let ow * unitstr.FLDLU_iDepth -> offset in
  (
    while (lunits != nil) do
    (
      let hd lunits -> unitstr in
      let VUIgetTextSize font unitstr.FLDLU_sLabel 0 iVUITEXT_HALIGNLEFT|iVUITEXT_VALIGNCENTER -> [tw th] in
      if (unitstr.FLDLU_lChildren == nil) then
        set width = max width (tw + 10 + offset)
      else
      let getWidth obstr unitstr.FLDLU_lChildren font -> childrenWidth in
        set width = max (max width (24 + tw + 10 + offset)) childrenWidth;

      set lunits = tl lunits;
    );
    width;
  );;


fun updateDialogSize(obstr)=
  let V3DgetSessionView c3dXsession -> viewstr in
  (
    VUIupdateListElementsCoords obstr.PFL_liststr obstr.PFL_liststr.VUIL_lListElts obstr.PFL_liststr.VUIL_tScroll;
    let VUIgetThemeDef (getThemeFromInstance obstr.PFL_instance) "dialogBox" -> defstr in
    let VUIgetFontFromInterface VUIgetThemeFont defstr "label" -> lbfontstr in
    let [10 0] -> [ow oh] in
    let getWidth obstr obstr.PFL_lList lbfontstr -> sw in
    let obstr.PFL_liststr.VUIL_tMargin -> [mx my] in
    let VUIgetListFullContentSize obstr.PFL_liststr 1 -> [tw th] in
    let max 30 th + 25 + if (obstr.PFL_bEditServer) then 40 else 0 -> sh in
    
    let VUIgetViewSize viewstr -> [cvw cvh] in 
    let VUIcomputeDialogBoxSize viewstr (getThemeFromInstance obstr.PFL_instance) (VUIgetElementText obstr.PFL_dlgstr.VUIDLG_title) (VUIgetElementText obstr.PFL_dlgstr.VUIDLG_frame) (if (obstr.PFL_dlgstr.VUIDLG_okBtn == nil && obstr.PFL_dlgstr.VUIDLG_cancelBtn == nil) then 0 else 1) -> [tlw tlh _ _ btnh] in
    let [(cvw - 20 - 30) (cvh - 30 - btnh - tlh)] -> [maxvw maxvh] in
    let [(min (max (max sw tlw) 400) maxvw) (min (max sh 80) maxvh)] -> [ttw tth] in
    let [ttw + 30 tth + btnh + tlh] -> [nw nh] in
    (
      VUIsetElementSize obstr.PFL_dlgstr.VUIDLG_title [100.0 (itof tlh)] nil;
      VUIsetElementSize obstr.PFL_dlgstr.VUIDLG_frame nil [1 1 (-20) (-(10 + tlh + 10 + btnh))];
      VUIsetElementPos obstr.PFL_dlgstr.VUIDLG_frame [0.0 (itof (10 + tlh))] nil nil;
      VUIsetContainerSize obstr.PFL_dlgstr.VUIDLG_container [(itof nw) (itof nh)] nil;
    );
  );
  0;;


fun cbDlgThemeUpdate(constr, obstr)=
  updateDialogSize obstr;;


fun cbSetTitle(inst, from, action, param, reply, obstr)=
  set obstr.PFL_sTitle = if (param == nil) || (!strcmp (strtrim param) "") then nil else strtrim param;
  if (obstr.PFL_dlgstr == nil) then nil else
  (
    VUIsetDialogTitle obstr.PFL_dlgstr obstr.PFL_sTitle;    
    updateDialogSize obstr;
  );
  0;;


fun findUnitInList(list, label)=
  let hd list -> unitstr in
  (
    while (list != nil && (strcmpi unitstr.FLDLU_sLabel label) != 0) do
    (
      set list = tl list;
      set unitstr = hd list;
    );
    
    unitstr;
  );;


fun addElement(obstr, parent, label, value, depth)=
  let mkFLDLUnit[nil label value depth nil] -> newunit in
  (
    if parent == nil then
      set obstr.PFL_lList = lcat obstr.PFL_lList newunit::nil
    else
      set parent.FLDLU_lChildren = lcat parent.FLDLU_lChildren newunit::nil;
    
    if obstr.PFL_dlgstr == nil then nil else
    let VUIaddListElement obstr.PFL_liststr parent.FLDLU_element label value 1 -> newelem in
      set newunit.FLDLU_element = newelem;
    
    newunit;
  );;


fun cbClickDlgButton(dlgstr, state, obstr)=
  set obstr.PFL_dlgstr = nil;  
  if (state) then
  (
    if ((obstr.PFL_selected == nil) || (obstr.PFL_selected.VUILE_sParam == nil) || (!strcmp obstr.PFL_selected.VUILE_sParam "")) then
    (
      createDialog nil obstr;
    )
    else
    (
      SendPluginEvent obstr.PFL_instance "Hidden" nil nil;
      SendPluginEvent obstr.PFL_instance "File ready" obstr.PFL_selected.VUILE_sParam nil;
    );
  )
  else
  (
    SendPluginEvent obstr.PFL_instance "Hidden" nil nil;
    SendPluginEvent obstr.PFL_instance "Cancelled" nil nil;
  );
  0;;


fun cbListSelect(liststr, lselected, obstr)=
  let hd lselected -> selectedstr in
    set obstr.PFL_selected = selectedstr;
  0;;


fun getAlign(param)=
  let [1 1] -> align in
  let [0.0 0.0] -> pos in
  let strextr param -> lp in
  let hd lp -> lp in
  let 0 -> nb in
  (
    while ((lp != nil) && (nb < 2)) do
    (
      let hd lp -> flag in
      if (!strcmpi flag "top") then
      (
        mutate align <- [_ 0];
        mutate pos <- [_ 10.0];
      )
      else if (!strcmpi flag "bottom") then
      (
        mutate align <- [_ 2];
        mutate pos <- [_ 10.0];
      )
      else if (!strcmpi flag "left") then
      (
        mutate align <- [0 _];
        mutate pos <- [10.0 _];
      )
      else if (!strcmpi flag "right") then
      (
        mutate align <- [2 _];
        mutate pos <- [10.0 _];
      )
      else nil;
      
      set lp = tl lp;
      set nb = nb + 1;
    );
    [pos align];
  );;


fun fillList(liststr, parentstr, lunits, unfold)=
  while (lunits != nil) do
  (
    let hd lunits -> unitstr in
    let VUIaddListElement liststr parentstr unitstr.FLDLU_sLabel unitstr.FLDLU_sValue 1 -> newelem in
    (
      set unitstr.FLDLU_element = newelem;
      fillList liststr newelem unitstr.FLDLU_lChildren unfold;
      if (!unfold || newelem.VUILE_children == nil) then nil else
        VUIunfoldListElement newelem 1;
    );
    set lunits = tl lunits;
  );
  0;;


fun cbValidateServer(eltstr, text, state, obstr)=
  if ((!state) || (!strcmp (strtrim text) "")) then nil else
  (
    set obstr.PFL_sPath = text;    
    _storepack obstr.PFL_sPath obstr.PFL_sConfPath;
    
    VUIsetElementTextContent eltstr obstr.PFL_sPath;
    fillLocalFiles obstr;
  );
  0;;


fun cbFocusedServer(eltstr, state, obstr)=
  let VUIgetElementText eltstr -> text in
  if (state || (!strcmp obstr.PFL_sPath text)) then nil else
    cbValidateServer eltstr text 1 obstr;
  0;;


fun createDialog(param, obstr)=
  let V3DgetSessionView c3dXsession -> viewstr in
  let VUIgetThemeDef (getThemeFromInstance obstr.PFL_instance) "dialogBox" -> defstr in
  let VUIgetThemeFont defstr "label" -> fontstr in
  let VUIgetFontFromInterface fontstr -> lbfontstr in
  let if (strcmpi obstr.PFL_sTitle "") == 0 then nil else obstr.PFL_sTitle -> title in
  let [10 0] -> [ow oh] in
  let max 400 getWidth obstr obstr.PFL_lList lbfontstr -> width in
  let locDef "OS3DFILESLIST_C0003" "Server URL" -> serverlabel in
  let if (obstr.PFL_bEditServer) then VUIgetTextSize lbfontstr serverlabel 0 iVUITEXT_HALIGNLEFT|iVUITEXT_VALIGNTOP else [0 0] -> [tw th] in
  let max 80 (200 + th + 10) -> height in
  let if (obstr.PFL_bEditServer) then 30 else 0 -> edth in
  let VUIcreateDialogExt viewstr obstr.PFL_instance.INST_groupstr.GRP_project.PRJ_vuiGroup [width height] title (locDef "OS3DFILESLIST_C0001" "Ok") (locDef "OS3DFILESLIST_C0002" "Cancel") obstr.PFL_iOpacity (V3DgetVrMode viewstr) (mkfun3 @cbClickDlgButton obstr) "dialogBox" -> dlgstr in
  let VUIgetDialogFrame dlgstr -> framestr in
  let VUIgetElementContainer framestr -> contstr in
  let VUIcreateFrame contstr framestr [0.0 0.0] [(itof (tw + 10)) 0.0] [0 0 0 0 0 0 0 0] [0 0] -> serverlabelstr in
  let if (obstr.PFL_bEditServer) then VUIcreateEditTextExt contstr framestr [itof (tw + 10) 0.0] [100.0 (itof edth)] [0 0 1 0 0 0 (-(tw + 10)) 0] [0 0] nil [10 5] obstr.PFL_sPath 0 "common/editText" else nil -> editstr in
  let if (obstr.PFL_bEditServer) then (edth + 10) else 0 -> ylist in
  let VUIcreateListExt contstr framestr [0.0 itof ylist] [100.0 100.0] [0 0 1 1 0 0 0 (-ylist)] [0 0] [5 5] 0 [ow oh] "list" -> liststr in
  (
    VUIsetElementText serverlabelstr fontstr serverlabel [0 0] [tw 0] [5 5] iVUITEXT_HALIGNLEFT|iVUITEXT_VALIGNTOP VUI_TextAutoHeight 1;
    fillList liststr nil obstr.PFL_lList 0;
    VUIsetListCbSelect liststr mkfun3 @cbListSelect obstr;
    VUIsetElementCbValidate editstr mkfun4 @cbValidateServer obstr;
    VUIsetElementCbFocused editstr mkfun3 @cbFocusedServer obstr;
    
    let if (!strcmp "" (strtrim param)) || param == nil then getAlign obstr.PFL_sPos else getAlign param -> [pos align] in
      VUIsetContainerPos contstr pos align nil;
    
    set obstr.PFL_dlgstr = dlgstr;
    set obstr.PFL_liststr = liststr;
    set obstr.PFL_selected = nil;
     
    VUIsetContainerThemeCallback contstr mkfun2 @cbDlgThemeUpdate obstr;
    VUIsetContainerClear contstr 0;    
    VUIshowDialog dlgstr 1;
    
    fillLocalFiles obstr;
  );
  0;;


fun cbVrChange(inst, viewstr, state, obstr)=
  if obstr.PFL_dlgstr == nil then nil else
  (
    VUIdestroyDialogBox obstr.PFL_dlgstr;
    createDialog nil obstr;
  );
  0;;


fun cbShow(inst, from, action, param, reply, obstr)=
  if obstr.PFL_dlgstr != nil then nil else
  (
    createDialog param obstr;
    SendPluginEvent inst "Shown" nil nil;
  );
  0;;


fun cbHide(inst, from, action, param, reply, obstr)=
  if obstr.PFL_dlgstr == nil then nil else
  (
    VUIdestroyDialogBox obstr.PFL_dlgstr;
    set obstr.PFL_dlgstr = nil;
    
    SendPluginEvent inst "Hidden" nil nil;
  );  
  0;;


fun cbClearList(inst, from, action, param, reply, obstr)=
  clearList obstr;
  
  if (obstr.PFL_dlgstr == nil) then nil else
    updateDialogSize obstr;
  0;;


fun cbChooseDir(dlg, obstr, path)=
  set obstr.PFL_sPath = path;    
  _storepack obstr.PFL_sPath obstr.PFL_sConfPath;
  
  //addLogMessage path;
  if (path == nil) then nil else
    cbShow obstr.PFL_instance nil nil nil nil obstr;
  0;;


fun cbChoosePath(inst, from, action, param, reply, obstr)=
  _DLGrflopenDir (_DLGOpenDir _channel nil obstr.PFL_sPath "") @cbChooseDir obstr;
  0;;


fun cbGetNextFile(inst, from, action, param, reply, obstr)=  
  set obstr.PFL_iFilePos = obstr.PFL_iFilePos + 1;
  if (obstr.PFL_iFilePos >= (sizelist obstr.PFL_lList)) then
    set obstr.PFL_iFilePos = 0;
    
  let nth_list obstr.PFL_lList obstr.PFL_iFilePos -> fstr in
    SendPluginEvent obstr.PFL_instance "File ready" fstr.FLDLU_sValue nil;  
  0;;


fun cbGetPreviousFile(inst, from, action, param, reply, obstr)=
  set obstr.PFL_iFilePos = obstr.PFL_iFilePos - 1;
  if (obstr.PFL_iFilePos < 0) then
  let sizelist obstr.PFL_lList -> nbfiles in
    set obstr.PFL_iFilePos = if (nbfiles == 0) then -1 else nbfiles - 1;
  
  let nth_list obstr.PFL_lList obstr.PFL_iFilePos -> fstr in
    SendPluginEvent obstr.PFL_instance "File ready" fstr.FLDLU_sValue nil;  
  0;;


fun deleteOb(inst, obstr)=
  VUIdestroyDialogBox obstr.PFL_dlgstr;
  0;;


fun newOb(inst)=
  let getPluginInstanceParam inst "title" -> title in
  let if (title == nil) then "" else title -> title in
  let getPluginInstanceParam inst "path" -> path in
  let if (path == nil) then sDefaultFilesPath else path -> path in
  let atoi (getPluginInstanceParam inst "editsrv") -> editsrv in
  let if (editsrv == nil) then 1 else editsrv -> editsrv in
  let getPluginInstanceParam inst "mask" -> mask in
  let if (mask == nil) || (!strcmp mask "") then "*.*" else mask -> mask in
  let atoi (getPluginInstanceParam inst "show") -> show in
  let if (show == nil) then 1 else show -> show in
  let atoi (getPluginInstanceParam inst "valign") -> valign in
  let if valign == nil then 1 else valign -> valign in
  let atoi (getPluginInstanceParam inst "halign") -> halign in
  let if halign == nil then 1 else halign -> halign in
  let if (valign == 0) then "top" else if (valign == 2) then "bottom" else "center" -> vpos in
  let if (halign == 0) then "left" else if (halign == 2) then "right" else "center" -> hpos in
  let atoi (getPluginInstanceParam inst "opacity") -> opacity in
  let if (opacity == nil) then 100 else opacity -> opacity in
  let strcatn sConfigPath::(getPluginInstanceFullname inst)::".conf"::nil -> confpath in
  let mkPlugOnlineFile [inst path mask title confpath editsrv nil nil nil nil nil (strcatn vpos::" "::hpos::nil) opacity (-1)] -> obstr in
  (
    if ((_checkpack confpath) == nil) then nil else
      set obstr.PFL_sPath = _getpack (_checkpack confpath);
    
    if (!show) then
      cbRefresh inst nil nil nil nil obstr
    else
      cbShow inst nil nil nil nil obstr;
    
    PluginRegisterAction inst "Show" mkfun6 @cbShow obstr;
    PluginRegisterAction inst "Hide" mkfun6 @cbHide obstr;
    PluginRegisterAction inst "Choose path" mkfun6 @cbChoosePath obstr;
    PluginRegisterAction inst "Set path" mkfun6 @cbSetPath obstr;
    PluginRegisterAction inst "Refresh" mkfun6 @cbRefresh obstr;
    PluginRegisterAction inst "Get next file" mkfun6 @cbGetNextFile obstr;
    PluginRegisterAction inst "Get previous file" mkfun6 @cbGetPreviousFile obstr;
    setPluginInstanceCbVrModeChanged inst mkfun4 @cbVrChange obstr;
    
    setPluginInstanceCbDel inst mkfun2 @deleteOb obstr;
  );
  0;;


fun IniPlug(file)=
  PlugRegister @newOb nil;
  setPluginEditor @dynamicedit;
  0;;