/*
 * Darkflame Universe
 * Copyright 2019
 */

#ifndef MOVINGPLATFORMCOMPONENT_H
#define MOVINGPLATFORMCOMPONENT_H

#include "NiPoint3.h"
#include <memory>
#include <string>
#include <vector>

#include "dCommonVars.h"
#include "Component.h"
#include "eMovementPlatformState.h"
#include "eReplicaComponentType.h"

class Path;

/**
 * Different types of available platforms
 */
enum class eMoverSubComponentType : uint32_t {
	None = 0,
	Mover = 4,
	SimpleMover = 5,
	Rotator = 6
};

class PlatformSubComponent {
public:
	PlatformSubComponent();
	virtual ~PlatformSubComponent() = default;
	virtual void Serialize(RakNet::BitStream* outBitStream, bool bIsInitialUpdate);
	virtual eMoverSubComponentType GetPlatformType() { return eMoverSubComponentType::None; };
	bool GetIsDirty() const { return m_IsDirty; }
protected:

#ifdef _MOVING_PLATFORM_TEST
public:
#endif
	/**
	 * The state the platform is currently in
	 */
	eMovementPlatformState m_State = eMovementPlatformState::Stopped | eMovementPlatformState::ReachedDesiredWaypoint;
	int32_t m_DesiredWaypointIndex = 0;
	float m_PercentBetweenPoints = 0;
	NiPoint3 m_Position;
	uint32_t m_CurrentWaypointIndex;
	uint32_t m_NextWaypointIndex;
	float m_IdleTimeElapsed = 0;
	float m_Speed = 0;
	float m_WaitTime = 0;
	float m_MoveTimeElapsed = 0;
	bool m_IsDirty = false;
	bool m_InReverse = false;
	bool m_ShouldStopAtDesiredWaypoint = false;
};

class MoverPlatformSubComponent : public PlatformSubComponent {
public:
	MoverPlatformSubComponent() : PlatformSubComponent() {};
	~MoverPlatformSubComponent() override = default;
	eMoverSubComponentType GetPlatformType() override { return eMoverSubComponentType::Mover; }
	void Serialize(RakNet::BitStream* outBitStream, bool bIsInitialUpdate) override { PlatformSubComponent::Serialize(outBitStream, bIsInitialUpdate); };
};

class RotatorPlatformSubComponent : public PlatformSubComponent {
public:
	RotatorPlatformSubComponent() : PlatformSubComponent() {};
	~RotatorPlatformSubComponent() override = default;
	eMoverSubComponentType GetPlatformType() override { return eMoverSubComponentType::Rotator; }
	void Serialize(RakNet::BitStream* outBitStream, bool bIsInitialUpdate) override { PlatformSubComponent::Serialize(outBitStream, bIsInitialUpdate); };
};

// Only moves. Has NO path.
class SimpleMoverPlatformSubComponent : public PlatformSubComponent {
public:
	SimpleMoverPlatformSubComponent() : PlatformSubComponent() {};
	~SimpleMoverPlatformSubComponent() override = default;
	eMoverSubComponentType GetPlatformType() override { return eMoverSubComponentType::SimpleMover; }
	void Serialize(RakNet::BitStream* outBitStream, bool bIsInitialUpdate) override { PlatformSubComponent::Serialize(outBitStream, bIsInitialUpdate); };
};

/**
 * Represents entities that may be moving platforms, indicating how they should move through the world.
 * NOTE: the logic in this component hardly does anything, apparently the client can figure most of this stuff out
 * if you just serialize it correctly, resulting in smoother results anyway. Don't be surprised if the exposed APIs
 * don't at all do what you expect them to as we don't instruct the client of changes made here.
 * ^^^ Trivia: This made the red blocks platform and property platforms a pain to implement.
 */
class MovingPlatformComponent : public Component {
public:
	static const eReplicaComponentType ComponentType = eReplicaComponentType::MOVING_PLATFORM;

	MovingPlatformComponent(Entity* parent, const std::string& pathName);

	void Serialize(RakNet::BitStream* outBitStream, bool bIsInitialUpdate, unsigned int& flags);

	/**
	 * Stops all pathing, called when an entity starts a quick build associated with this platform
	 */
	void OnRebuildInitilized();

	/**
	 * Starts the pathing, called when an entity completed a quick build associated with this platform
	 */
	void OnCompleteRebuild();

	/**
	 * Updates the movement state for the moving platform
	 * @param value the movement state to set
	 */
	void SetMovementState(eMovementPlatformState value);

	/**
	 * Instructs the moving platform to go to some waypoint
	 * @param index the index of the waypoint
	 * @param stopAtWaypoint determines if the platform should stop at the waypoint
	 */
	void GotoWaypoint(uint32_t index, bool stopAtWaypoint = true);

	/**
	 * Starts the pathing of this platform, setting appropriate waypoints and speeds
	 */
	void StartPathing();

	/**
	 * Continues the path of the platform, after it's been stopped
	 */
	void ContinuePathing();

	/**
	 * Stops the platform from moving, waiting for it to be activated again.
	 */
	void StopPathing();

	/**
	 * Determines if the entity should be serialized on the next update
	 * @param value whether to serialize the entity or not
	 */
	void SetSerialized(bool value);

	/**
	 * Returns if this platform will start automatically after spawn
	 * @return if this platform will start automatically after spawn
	 */
	bool GetNoAutoStart() const;

	/**
	 * Sets the auto start value for this platform
	 * @param value the auto start value to set
	 */
	void SetNoAutoStart(bool value);

	/**
	 * Warps the platform to a waypoint index, skipping its current path
	 * @param index the index to go to
	 */
	void WarpToWaypoint(size_t index);

	/**
	 * Returns the waypoint this platform was previously at
	 * @return the waypoint this platform was previously at
	 */
	size_t GetLastWaypointIndex() const;

#ifdef _MOVING_PLATFORM_TEST
	/**
	 * Only used for testing. Do not call in production code. Let the constructor take care of this.
	 * 
	 * @param platformSubComponent 
	 */
	void _AddPlatformSubComponent(std::unique_ptr<PlatformSubComponent> platformSubComponent) {
		m_Platforms.push_back(std::move(platformSubComponent));
	}

	void _SetPath(const std::u16string& path) {
		m_PathName = path;
		m_DirtyPathInfo = true;
	}
#endif
private:
	/**
	 * The name of the path this platform is currently on
	 */
	std::u16string m_PathName;

	/**
	 * Whether the platform has stopped pathing
	 */
	bool m_PathingStopped = false;

	/**
	 * The mover sub component that belongs to this platform
	 */
	std::vector<std::unique_ptr<PlatformSubComponent>> m_Platforms;

	/**
	 * Whether the platform shouldn't auto start
	 */
	bool m_NoAutoStart;

	/**
	 * Whether to serialize the entity on the next update
	 */
	bool m_Serialize = false;

	bool m_DirtyPathInfo = false;
};

#endif // MOVINGPLATFORMCOMPONENT_H