-- TIME_STAMP   2021-11-24 17:18:17   v 0.1


local tAU3Help = {}

do
    tAU3Help.pattFunc = '([Ff][Uu][Nn][Cc]%s+[%w_]+%s-%b())'
    tAU3Help.pattFuncName = '([Ff][Uu][Nn][Cc]%s+)([%w_]+)(%s-%b())'
    tAU3Help.t_names = {}

    tAU3Help.GetItemHelp = function(self, _item)
        local prefix = _item:match('^(_%w+_)')
        if prefix ~= nil then
            if self:Extract(prefix) then
                if self.t_names[_item:upper()] then
                    self:CallHelp(prefix, _item)
                    return
                end
            end
        end
        self:CallHelp('AU3', _item)
    end

    tAU3Help.Extract = function(self, _prefix)
        self.t_names = {}
	    local e, func, fname, s, a = 1, '', ''
	    local fh = io.open(props['udf.path.'.._prefix:upper()])
        if fh == nil then return false end
	    s = fh:read('*a') fh:close()
		while e do
			a, e, func = s:find(self.pattFunc , e)
			if a then
				_, _, _, fname = func:find(self.pattFuncName)
                if fname:sub(1, _prefix:len()):upper() == _prefix:upper() then
				    self.t_names[fname:upper()] = true
                end
			end
		end
        return true
	end

    tAU3Help.CallHelp = function(self, _prefix, _item)
        local path, cmd = props['chm.path.'.._prefix:upper()]
        if _prefix == 'AU3' then
            cmd = '\""'..props['autoit3dir']..'\\Autoit3Help.exe" "'.._item..'"\"'
        else
            cmd = 'start /B hh.exe mk:@MSITStore:'..path..'::/funcs/'.._item..'.htm'
        end
        os.execute(cmd)
    end

end


tAU3Help:GetItemHelp(props['CurrentWord'])