Tower-Defense2/include/td/game/Mobs.h

#pragma once

#include <td/game/Towers.h>

#include <td/Maths.h>
#include <td/Types.h>
#include <td/game/Team.h>

#include <memory>
#include <vector>

namespace td {
using Vec2fp = Vec2<FpFloat>;

namespace game {


struct WalkableTile;

enum class EffectType : std::uint8_t {
	Slowness = 0,
	Stun,
	Fire,
	Poison,
	Heal,
};

enum class MobType : std::uint8_t {
	Zombie = 0,
	Spider,
	Skeleton,
	Pigman,
	Creeper,
	Silverfish,
	Blaze,
	Witch,
	Slime,
	Giant,

	MOB_COUNT
};

typedef std::uint32_t MobID;
typedef std::uint8_t MobLevel;
typedef std::vector<TowerType> TowerImmunities;
typedef std::vector<EffectType> EffectImmunities;

struct MobStats {
	float m_Damage;
	float m_Speed;
	Vec2f m_Size;
	std::uint16_t m_MoneyCost;
	std::uint16_t m_ExpCost;
	std::uint16_t m_MaxLife;
	std::uint16_t m_ExpReward;
};

struct EffectDuration {
	EffectType type;
	float duration;	 // in seconds
	Tower* tower;	 // the tower that gived the effect
};

const MobStats* GetMobStats(MobType type, std::uint8_t level);
const TowerImmunities& GetMobTowerImmunities(MobType type, std::uint8_t level);
const EffectImmunities& GetMobEffectImmunities(MobType type, std::uint8_t level);

class Mob {
  protected:
	float m_Health;

  private:
	Vec2fp m_Position;
	MobID m_ID;
	PlayerID m_Sender;
	MobLevel m_Level;
	Direction m_Direction;
	std::vector<EffectDuration> m_Effects;
	const Tower* m_LastDamage;	// the last tower that damaged the mob
	float m_HitCooldown;

	// utils::Timer m_EffectFireTimer;
	// utils::Timer m_EffectPoisonTimer;
	// utils::Timer m_EffectHealTimer;

	TeamCastle* m_CastleTarget;
	// utils::CooldownTimer m_AttackTimer;

  public:
	Mob(MobID id, MobLevel level, PlayerID sender) : m_Sender(sender), m_Level(level), m_HitCooldown(0), m_CastleTarget(nullptr) {}

	virtual ~Mob() {}

	virtual MobType GetType() const = 0;

	virtual bool OnDeath(World* world) {
		return true;
	}

	Vec2fp& GetPosition() {
		return m_Position;
	}

	MobID GetMobID() const {
		return m_ID;
	}
	const TowerImmunities& GetTowerImmunities() const {
		return GetMobTowerImmunities(GetType(), m_Level);
	}
	const EffectImmunities& GetEffectImmunities() const {
		return GetMobEffectImmunities(GetType(), m_Level);
	}
	PlayerID GetSender() const {
		return m_Sender;
	}
	MobLevel GetLevel() const {
		return m_Level;
	}
	const MobStats* GetStats() const {
		return GetMobStats(GetType(), m_Level);
	}
	void SetHealth(float newHealth) {
		m_Health = newHealth;
	}
	float GetHealth() const {
		return m_Health;
	}
	bool IsDead() const {
		return m_Health <= 0;
	}
	bool IsAlive() const {
		return m_Health > 0;
	}
	const Tower* GetLastDamageTower() {
		return m_LastDamage;
	}
	bool HasReachedEnemyCastle() {
		return m_CastleTarget != nullptr;
	}

	void Damage(float dmg, const Tower* damager) {
		m_Health = std::max(0.0f, m_Health - dmg);
		m_LastDamage = damager;
		m_HitCooldown = 0.1;
	}

	void Heal(float heal) {
		m_Health = std::min(static_cast<float>(GetStats()->m_MaxLife), m_Health + heal);
	}

	void SetMobReachedCastle(TeamCastle* castle) {
		m_CastleTarget = castle;
	}  // used when mob is in front of the castle

	bool IsImmuneTo(TowerType type);

	bool IsImmuneTo(EffectType type);
	void AddEffect(EffectType type, float durationSec, Tower* tower);
	bool HasEffect(EffectType type);

	bool HasTakenDamage() {
		return m_HitCooldown > 0;
	}

	// // returns a float between 0 and 1 excluded
	// float GetTileX() {
	// 	return GetCenterX() - static_cast<float>(static_cast<std::int32_t>(GetCenterX()));
	// }

	// // returns a float between 0 and 1 excluded
	// float GetTileY() {
	// 	return GetCenterY() - static_cast<float>(static_cast<std::int32_t>(GetCenterY()));
	// }

	Direction GetDirection() const {
		return m_Direction;
	}
	void SetDirection(Direction dir) {
		m_Direction = dir;
	}

  protected:
	void InitMob() {
		m_Health = static_cast<float>(GetStats()->m_MaxLife);
		// SetSize(GetStats()->m_Size.x, GetStats()->m_Size.y);
	}

  private:
	void UpdateEffects(std::uint64_t delta, World* world);
	void AttackCastle(std::uint64_t delta, World* world);
	void Move(std::uint64_t delta, World* world);
	void Walk(std::uint64_t delta, World* world);
	void MoveBack(const TeamCastle& castle, World* world);
	void ChangeDirection(const WalkableTile& tile, World* world);
	bool IsTouchingCastle(const TeamCastle& castle) const;
	EffectDuration& GetEffect(EffectType type);
};

typedef std::shared_ptr<Mob> MobPtr;

template <MobType MT>
class ConcreteMob : public Mob {
  public:
	ConcreteMob(MobID id, std::uint8_t level, PlayerID sender) : Mob(id, level, sender) {
		InitMob();
	}

	virtual ~ConcreteMob() {}

	virtual constexpr MobType GetType() const override {
		return MT;
	}
};

using Zombie = ConcreteMob<MobType::Zombie>;
using Spider = ConcreteMob<MobType::Spider>;
using Skeleton = ConcreteMob<MobType::Skeleton>;
using PigMan = ConcreteMob<MobType::Pigman>;
using Creeper = ConcreteMob<MobType::Creeper>;
using Silverfish = ConcreteMob<MobType::Silverfish>;
using Blaze = ConcreteMob<MobType::Blaze>;
using Witch = ConcreteMob<MobType::Witch>;
using Slime = ConcreteMob<MobType::Slime>;
using Giant = ConcreteMob<MobType::Giant>;

namespace MobFactory {

MobPtr CreateMob(MobID id, MobType type, std::uint8_t level, PlayerID sender);
std::string GetMobName(MobType type);

}  // namespace MobFactory

class MobListener {
  public:
	virtual void OnMobSpawn(Mob* mob) {}
	virtual void OnMobDie(Mob* mob) {}

	virtual void OnMobDamage(Mob* target, float damage, Tower* damager) {}

	virtual void OnMobTouchCastle(Mob* damager, TeamCastle* enemyCastle) {}
	virtual void OnMobCastleDamage(Mob* damager, TeamCastle* enemyCastle, float damage) {}
};

// typedef utils::ObjectNotifier<MobListener> MobNotifier;

}  // namespace game
}  // namespace td