/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
#pragma once
#include <AzCore/Component/Component.h>
#include <AzCore/Component/TickBus.h>
#include <AzCore/Math/Transform.h>

namespace Camera
{
    class ICameraLookAtBehavior;
    class ICameraTargetAcquirer;
    class ICameraTransformBehavior;
    class ICameraZoomBehavior;

    //////////////////////////////////////////////////////////////////////////
    /// The CameraRigComponent holds a recipe of behaviors.
    /// It will first attempt to acquire a target by iterating over the LookTargetAquirers until one returns true
    /// Next it will pass a modifiable lookAt Transform to all LookAtBehaviors in order, giving each a pass at further modifying the LookAt Transform
    /// Finally it will pass a modifiable transform to all Transform behaviors in turn, giving each a chance to further modify the transform
    //////////////////////////////////////////////////////////////////////////
    class CameraRigComponent
        : public AZ::Component
        , public AZ::TickBus::Handler
    {
    public:
        AZ_COMPONENT(CameraRigComponent, "{286BF97A-1B4A-4EE1-944F-C13B2396227B}");
        ~CameraRigComponent() override;

        static void GetProvidedServices(AZ::ComponentDescriptor::DependencyArrayType& provided);
        static void GetRequiredServices(AZ::ComponentDescriptor::DependencyArrayType& required);
        static void GetDependentServices(AZ::ComponentDescriptor::DependencyArrayType& dependent);
        static void Reflect(AZ::ReflectContext* reflection);

        //////////////////////////////////////////////////////////////////////////
        // AZ::Component
        void Init() override;
        void Activate() override;
        void Deactivate() override;
        //////////////////////////////////////////////////////////////////////////

        //////////////////////////////////////////////////////////////////////////
        // AZ::TickBus::Handler
        void OnTick(float deltaTime, AZ::ScriptTimePoint time) override;
        //////////////////////////////////////////////////////////////////////////

    private:
        AZStd::vector<ICameraTargetAcquirer*> m_targetAcquirers;
        AZStd::vector<ICameraLookAtBehavior*> m_lookAtBehaviors;
        AZStd::vector<ICameraTransformBehavior*> m_transformBehaviors;
        AZStd::vector<ICameraZoomBehavior*> m_zoomBehaviors;
        float m_initialFov;
        AZ::Transform m_initialTransform;
    };
} // Camera