--[[
    This file is part of Decursive.

    Decursive (v 2.7.7) add-on for World of Warcraft UI
    Copyright (C) 2006-2019 John Wellesz (Decursive AT 2072productions.com) ( http://www.2072productions.com/to/decursive.php )

    Decursive is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Decursive 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Decursive.  If not, see <https://www.gnu.org/licenses/>.


    Decursive is inspired from the original "Decursive v1.9.4" by Patrick Bohnet (Quu).
    The original "Decursive 1.9.4" is in public domain ( www.quutar.com )

    Decursive is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY.
--]]
-------------------------------------------------------------------------------

local addonName, T = ...;
-- big ugly scary fatal error message display function {{{
if not T._FatalError then
-- the beautiful error popup : {{{ -
StaticPopupDialogs["DECURSIVE_ERROR_FRAME"] = {
    text = "|cFFFF0000Decursive Error:|r\n%s",
    button1 = "OK",
    OnAccept = function()
        return false;
    end,
    timeout = 0,
    whileDead = 1,
    hideOnEscape = 1,
    showAlert = 1,
    preferredIndex = 3,
    }; -- }}}
T._FatalError = function (TheError) StaticPopup_Show ("DECURSIVE_ERROR_FRAME", TheError); end
end
-- }}}
if not T._LoadedFiles or not T._LoadedFiles["Decursive.xml"] or not T._LoadedFiles["Decursive.lua"] then
    if not DecursiveInstallCorrupted then T._FatalError("Decursive installation is corrupted! (Decursive.xml or Decursive.lua not loaded)"); end;
    DecursiveInstallCorrupted = true;
    return;
end
T._LoadedFiles["Dcr_lists.lua"] = false;

local D = T.Dcr;


local L = D.L;
local LC = D.LC;
local DC = T._C;
local _;
local _G = _G;

local pairs             = _G.pairs;
local ipairs            = _G.ipairs;
local type              = _G.type;
local string            = _G.string;
local UnitGUID          = _G.UnitGUID;
local table             = _G.table;
local str_format        = _G.string.format;
local t_insert          = _G.table.insert;

local UnitClass         = _G.UnitClass;
local UnitExists        = _G.UnitExists;
local UnitIsPlayer      = _G.UnitIsPlayer;
local GetRaidRosterInfo = _G.GetRaidRosterInfo;
local IsShiftKeyDown    = _G.IsShiftKeyDown;
local IsControlKeyDown  = _G.IsControlKeyDown;

-- Dcr_ListFrameTemplate specific internal functions {{{
function D.ListFrameTemplate_OnLoad(frame)
    frame.ScrollFrame = _G[frame:GetName().."ScrollFrame"];
    frame.ScrollBar = _G[frame.ScrollFrame:GetName().."ScrollBar"];
    frame.ScrollFrame.offset = 0;
end

function D:ListFrameScrollFrameTemplate_OnMouseWheel(frame, value)
    local scrollBar = _G[frame:GetName().."ScrollBar"];
    local min, max = scrollBar:GetMinMaxValues();
    if ( value > 0 ) then
        if (IsShiftKeyDown() ) then
            scrollBar:SetValue(min);
        else
            scrollBar:SetValue(scrollBar:GetValue() - scrollBar:GetValueStep());
        end
    else
        if (IsShiftKeyDown() ) then
            scrollBar:SetValue(max);
        else
            scrollBar:SetValue(scrollBar:GetValue() + scrollBar:GetValueStep());
        end
    end
end

-- }}}

-- Dcr_ListFrameTemplate specific handlers {{{

function D.PrioSkipListFrame_OnUpdate(frame) --{{{


    if not D.DcrFullyInitialized then
        return;
    end

    if (frame.UpdateYourself) then
        frame.UpdateYourself = false;
        local baseName = frame:GetName();
        local size;

        if (frame.Priority) then
            size = #D.profile.PriorityList;
        else
            size = #D.profile.SkipList;
        end
        -- D:Debug("PrioSkipListFrame_OnUpdate executed", size, this.ScrollFrame.offset);

        local i;
        for i = 1, 10 do
            local id = ""..i;
            if (i < 10) then
                id = "0"..i;
            end
            local btn = _G[baseName.."Index"..id];

            btn:SetID( i + frame.ScrollFrame.offset);
            D:PrioSkipListEntry_Update(btn);

            if (i <= size) then
                btn:Show();
            else
                btn:Hide();
            end
        end
        frame.ScrollUpdateFunc(_G[baseName.."ScrollFrame"], true);
    end

end --}}}

function D.PrioSkipListEntryTemplate_OnClick(listFrame, entryBFrame, button) --{{{

    local list;
    local UnitNum;
    if listFrame.Priority then
        list = D.profile.PriorityList;
        UnitNum = #D.profile.PriorityList;
    else
        list = D.profile.SkipList;
        UnitNum = #D.profile.SkipList;
    end


    local id = entryBFrame:GetID();
    if (id) then
        if (IsControlKeyDown()) then
            if (listFrame.Priority) then
                D:RemoveIDFromPriorityList(id);
            else
                D:RemoveIDFromSkipList(id);
            end
        elseif (UnitNum > 1) then
            local previousUnit_ID, previousUnit, nextUnit_ID, nextUnit, currentUnit;

            previousUnit_ID  = id - 1;
            nextUnit_ID      = id + 1;

            previousUnit = list[previousUnit_ID];
            nextUnit     = list[nextUnit_ID    ];
            currentUnit  = list[id];


            if (button=="RightButton" and IsShiftKeyDown()) then -- move at the bottom
                table.remove(list, id);
                table.insert(list, UnitNum, currentUnit);

            elseif (button=="LeftButton" and IsShiftKeyDown()) then -- move at the top
                table.remove(list, id);
                table.insert(list, 1, currentUnit);
            elseif (button=="LeftButton" and id ~= 1) then -- unit gets higher
                D:Debug("upping %s of id %d", list[id], id);
                list[previousUnit_ID]   = list[id];
                list[id]                = previousUnit;
            elseif (button=="RightButton" and id ~= UnitNum) then -- unit gets lower
                D:Debug("downing %s of id %d", list[id], id);
                list[nextUnit_ID]       = list[id];
                list[id]                = nextUnit;
            elseif (button=="MiddleButton") then

            end
            listFrame.UpdateYourself = true;
        end
        D.Status.PrioChanged       = true;
        D:GroupChanged ("PrioSkipListEntryTemplate_OnClick");
    else
            D:Debug("No ID");
    end

end --}}}

function D:PrioSkipListEntry_Update(Entry) --{{{
        local id = Entry:GetID();
        if (id) then
        --D:Debug("PrioSkipListEntry_Update executed");
            local name, classname, GUIDorNum;
            if (Entry:GetParent().Priority) then
                GUIDorNum = D.profile.PriorityList[id];
                classname = D.profile.PriorityListClass[GUIDorNum];
                name = D.profile.PrioGUIDtoNAME[GUIDorNum];
            else
                GUIDorNum = D.profile.SkipList[id];
                classname = D.profile.SkipListClass[GUIDorNum];
                name = D.profile.SkipGUIDtoNAME[GUIDorNum];
            end

            if (GUIDorNum) then
                if (type(GUIDorNum) == "number") then
                    if (GUIDorNum > 10) then
                        name = str_format("[ %s ]", DC.ClassNumToLName[GUIDorNum]);
                    elseif GUIDorNum > 0 then
                        name = str_format("[ %s %s ]", L["STR_GROUP"], GUIDorNum);
                    else
                        name = str_format("[ %s ]", _G[({"HEALER", "TANK", "DAMAGER"})[-GUIDorNum]] or GUIDorNum);
                    end
                end
                Entry:SetText(id.." - "..D:ColorText(name, classname and "FF"..DC.HexClassColor[classname] or (GUIDorNum > 0 and "FFCACAF0" or "FFBAF0DA") ));
            else
                Entry:SetText("Error - NO name!");
            end
        else
            Entry:SetText("Error - No ID!");
        end
end --}}}

function D.PrioSkipList_ScrollFrame_Update (ScrollFrame) -- {{{

    if not D.DcrFullyInitialized then
        return;
    end

    local maxentry;
    local UpdateListOnceDone = true;
    local DirectCall = false;

    D:Debug("ScrollFrame is a %s", type(ScrollFrame));
    if (not ScrollFrame) then
        --ScrollFrame = this; -- Called from the scrollbar frame handler
    else
        --UpdateListOnceDone = false; -- The function was called from the list update function
        DirectCall = true;
    end

    if (not ScrollFrame.UpdateYourself) then
        ScrollFrame.UpdateYourself = true;
        return;
    end

    if (ScrollFrame:GetParent().Priority) then
        maxentry = #D.profile.PriorityList;
    else
        maxentry = #D.profile.SkipList;
    end

    FauxScrollFrame_Update(ScrollFrame,maxentry,10,16);


    if (UpdateListOnceDone) then
        ScrollFrame.UpdateYourself = false; -- prevent this function to re-execute unecessarily
        ScrollFrame:GetParent().UpdateYourself = true;
    end
    D:Debug("PrioSkipList_ScrollFrame_Update executed for %s", ScrollFrame:GetName());
end -- }}}


-- }}}

-- list specific management functions {{{
-------------------------------------------------------------------------------

function D:AddTargetToPriorityList() --{{{
    D:Debug( "Adding the target to the priority list");
    return D:AddElementToPriorityList("target", true);
end --}}}

local function AddElementToList(element, checkIfExist, list, listGUIDtoName, listClass) -- {{{

    if not D.DcrFullyInitialized then
        return false;
    end

    if #list > 99 then
        return false;
    end

    if not checkIfExist or UnitExists(element) then
        if type(element) == "number" or UnitIsPlayer(element) then
            D:Debug("adding %s", element);

            local GUIDorNum;

            if type(element) == "number" then
                GUIDorNum = element;
            else
                GUIDorNum = UnitGUID(element);
                if not GUIDorNum then
                    return false;
                end
            end

            if listGUIDtoName[GUIDorNum] then
                return false;
            end

            table.insert(list, GUIDorNum);

            if type(element) == "string" then
                _, listClass[GUIDorNum]   = UnitClass(element);
                listGUIDtoName[GUIDorNum] = D:UnitName(element);
            elseif element > 10 then
                listClass[element]        = DC.ClassNumToUName[element];
                listGUIDtoName[GUIDorNum] = str_format("[ %s ]", DC.ClassNumToLName[GUIDorNum]);
            else
                listGUIDtoName[GUIDorNum] = str_format("[ %s %s ]", L["STR_GROUP"], GUIDorNum);
            end

            return true;
        else
            D:Debug("Unit is not a player:", element, checkIfExist, UnitExists(element));

            if not element then
                error("D:AddElementToList: bad argument #1 'element' must be!",2);
            end
        end
    else
        D:Debug("Unit does not exist");
    end

    return false;
end -- }}}

function D:AddElementToPriorityList(element, check) --{{{

    if AddElementToList(element, check, D.profile.PriorityList, D.profile.PrioGUIDtoNAME, D.profile.PriorityListClass) then

        DecursivePriorityListFrame.UpdateYourself = true;
        D.Status.PrioChanged                      = true;

        D:GroupChanged("AddElementToPriorityList");
        D:Debug("Unit %s added to the prio list", element);
        return true;
    else
        return false;
    end

end --}}}

function D:RemoveIDFromPriorityList(id) --{{{

    D.profile.PriorityListClass[ D.profile.PriorityList[id] ] = nil; -- remove it from the table
    D.profile.PrioGUIDtoNAME[ D.profile.PriorityList[id]] = nil;

    table.remove( D.profile.PriorityList, id );

    D.Status.PrioChanged       = true;
    D:GroupChanged ("RemoveIDFromPriorityList");
    DecursivePriorityListFrame.UpdateYourself = true;
end --}}}

function D:ClearPriorityList() --{{{
    D.profile.PriorityList = {};
    D.profile.PriorityListClass = {};
    D.profile.PrioGUIDtoNAME = {};

    D.Status.PrioChanged       = true;
    D:GroupChanged ("ClearPriorityList");
    DecursivePriorityListFrame.UpdateYourself = true;
end --}}}

function D:AddTargetToSkipList() --{{{
    D:Debug( "Adding the target to the Skip list");
    return D:AddElementToSkipList("target");
end --}}}



function D:AddElementToSkipList(element, check) --{{{

    if AddElementToList(element, check, D.profile.SkipList, D.profile.SkipGUIDtoNAME, D.profile.SkipListClass) then

        DecursiveSkipListFrame.UpdateYourself = true;
        D.Status.PrioChanged                  = true;

        D:GroupChanged ("AddElementToSkipList");

        D:Debug("Unit %s added to the skip list", element);
        return true;
    else
        return false;
    end

end --}}}

function D:RemoveIDFromSkipList(id) --{{{

    D.profile.SkipListClass[ D.profile.SkipList[id] ] = nil; -- remove it from the table
    D.profile.SkipGUIDtoNAME[ D.profile.SkipList[id]] = nil;


    table.remove( D.profile.SkipList, id );

    D.Status.PrioChanged       = true;
    D:GroupChanged ("RemoveIDFromSkipList");
    DecursiveSkipListFrame.UpdateYourself = true;
end --}}}

function D:ClearSkipList() --{{{
    local i;

    D.profile.SkipList = {};
    D.profile.SkipListClass = {};
    D.profile.SkipGUIDtoNAME = {};

    D.Status.PrioChanged       = true;
    D.Groups_datas_are_invalid = true;
    D:GroupChanged ("ClearSkipList");
    DecursiveSkipListFrame.UpdateYourself = true;
end --}}}


function D:IsInPriorList (GUID) --{{{
    return self.Status.InternalPrioList[GUID] or false;
end --}}}

function D:IsInSkipList (GUID) --{{{
    return self.Status.InternalSkipList[GUID] or false;
end --}}}


-- }}}



function D:PopulateButtonPress(frame) --{{{
    local PopulateFrame = frame:GetParent();
    local UppedClass = "";

    if (IsShiftKeyDown() and frame.ClassType) then

        -- UnitClass returns uppercased class...
        UppedClass = string.upper(frame.ClassType);

        D:Debug("Populate called for %s", frame.ClassType);
        -- for the class type stuff... we do party

        local _, pclass = UnitClass("player");
        if (pclass == UppedClass) then
            PopulateFrame:addFunction("player");
        end

        _, pclass = UnitClass("party1");
        if (pclass == UppedClass) then
            PopulateFrame:addFunction("party1");
        end
        _, pclass = UnitClass("party2");
        if (pclass == UppedClass) then
            PopulateFrame:addFunction("party2");
        end
        _, pclass = UnitClass("party3");
        if (pclass == UppedClass) then
            PopulateFrame:addFunction("party3");
        end
        _, pclass = UnitClass("party4");
        if (pclass == UppedClass) then
            PopulateFrame:addFunction("party4");
        end
    end

    local i, pgroup, pclass;


    if (IsShiftKeyDown() and frame.ClassType) then
        D:Debug("Finding raid units with a macthing class");
        for index, unit in ipairs(D.Status.Unit_Array) do
            _, pclass = UnitClass(unit);

            if (pclass == UppedClass) then
                D:Debug("found %s", pclass);
                PopulateFrame:addFunction(unit);
            end

        end
    elseif (frame.ClassType) then
        PopulateFrame:addFunction(DC.ClassUNameToNum[string.upper(frame.ClassType)]);
    end


    local max = DC.GetNumRaidMembers();

    if (IsShiftKeyDown() and frame.GroupNumber and max > 0) then
        D:Debug("Finding raid units with a matching group number");
        for i = 1, max do
            _, _, pgroup, _, _, pclass = GetRaidRosterInfo(i);

            if (pgroup == frame.GroupNumber) then
                D:Debug("found %s in group %d", pclass, max);
                PopulateFrame:addFunction("raid"..i);
            end
        end
    elseif (not IsShiftKeyDown() and frame.GroupNumber) then
        PopulateFrame:addFunction(frame.GroupNumber);
    end

end --}}}

T._LoadedFiles["Dcr_lists.lua"] = "2.7.7";
