flow={
    level=1,
    step={0},
    paths={ {flow_safe} },
    registre={ }    
    -- sub_path_enable = false,
    -- sub_step = 0,
    -- sub_path={}
}

function flow_safe()
    print("FLOW SAFE")
end

function flow:print()
    print("> STEP= "..self.step.." / "..#self.path)
    if self.sub_path_enable then
        print("> SUB_PATH_ENABLE= TRUE")
    else
        print("> SUB_PATH_ENABLE= FALSE")
    end
    print("> SUB_STEP= "..self.sub_step.." / "..#self.sub_path)
    print("")
end

function flow:next()
    local level_step = self.step[self.level]
    local level_path = self.paths[self.level]
    -- print("LEVEL= "..self.level)
    -- print("LEVEL_STEP= "..level_step)
    if level_step+1 > #level_path then
        -- Si s'ha acabat la llista pujar de nivell
        if self.level>1 then self.level=self.level-1 end
        level_step = self.step[self.level]
        -- level_path = self.paths[self.level]
    end
    
    -- següent pas
    level_step = level_step+1
    game_update = self.paths[self.level][level_step]
    
    -- result = self.step[self.level]
    self.step[self.level] = level_step
end

function flow:restore()
    local level_step = self.step[self.level]
    game_update = self.paths[self.level][level_step]
end

function flow:call(nom)
    game_update = self.registre[nom]
end

function flow:add_path( path )
    self.level = self.level+1
    self.step[self.level] = 0
    self.paths[self.level] = path
end

function flow:add(name, fn)
   self.registre[name] = fn 
end