-- Statemanager by Averice
class "CStateManager";

function CStateManager:Init()
    self.States = {}
end

function CStateManager:Push(state, init)
    if( ctype(state) == "CState" ) then
        self.States[#self.States+1] = state;
        if( init ) then
            if( self.States[#self.States-1] and self.States[#self.States-1].isinit ) then
                self.States[#self.States-1]:Shutdown();
                self.States[#self.States-1].isinit = false;
            end
            self.States[#self.States]:Init(App.context);
            self.States[#self.States].isinit = true;
        end
    else
        print("StateManager: CStateManager.Push expected CState got: "..ctype(state));
    end
end

function CStateManager:InitCurrentState()
    if( self.States[1] and not self.States[#self.States].isinit ) then
        self.States[#self.States]:Init(App.context);
        self.States[#self.States].isinit = true;
    end
end

function CStateManager:Pop()
    if( self.States[1] ) then
        if( self.States[#self.States].isinit ) then
            self.States[#self.States].isinit = false;
            self.States[#self.States]:Shutdown();
        end
        local oldState = self.States[#self.States];
        self.States[#self.States] = nil;
        self:InitCurrentState();
        return oldState;
    end
    print("StateManager: Called CStateManager.Pop with empty stack");
end

function CStateManager:GetAll()
    return self.States
end

function CStateManager:GetActive()
    if( self.States[1] and self.States[#self.States].isinit ) then
        return self.States[#self.States];
    end
    print("StateManager: Called CStateManager.GetActive with no running states");
end

function CStateManager:Pause(state)
    if( ctype(state) == "CState" ) then
        state.paused = true;
    end
end

function CStateManager:Resume(state)
    if( ctype(state) == "CState" ) then
        state.paused = false;
    end
end

function CStateManager:IsPaused(state)
    if( ctype(state) == "CState" ) then
        return state.paused;
    end
end

function CStateManager:Call(func, ...)
    if( self.States[1] and self.States[#self.States].isinit and not self.States[#self.States].paused ) then
        if( self.States[#self.States][func] ) then
            self.States[#self.States][func](self.States[#self.States], ...);
        end
    end
end