ActionTowerDefense/ActionTowerDefense/Assets/Scripts/Characters/Enemy.cs

using Spine.Unity;
using Spine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Base.Common;
using UnityEditor.SceneManagement;

public enum TargetType
{
    None = 0,
    Demonic = 1,
    Tower = 2,
    Player = 3,
    Enemy = 4,
    EnemyTower = 5,
    Boss = 6,
    Portal = 7,
}

public enum SearchState
{
    NoTarget = 0,       //搜索范围内没有目标
    InSearchScope = 1,  //在搜索范围内发现目标，但不在攻击范围内
    InAttackScope = 2,  //目标在攻击范围内
}

public class Enemy : MoveCharacter
{
    [Header("敌方单位属性")]
    public int id;
    public int baseSortingOrder;
    int sortingOrder = 0;
    public bool isBack = false; //往反方向走
    public float flyHeight;
    public float flyUpSpeed = 10;
    public float jumpSpeed = 10;
    public float maxMoveSpeed, minMoveSpeed;
    public float runSpeed;

    [Header("击飞、屏幕反弹")]
    public bool isBeBlownUp;    //被击飞
    public bool isBeReboundedX; //X方向被反弹
    public bool isBeReboundedY; //Y方向被反弹
    private bool hasBeReboundedX;
    private bool hasBeReboundedY;
    public float reboundXSpeed;
    public float reboundYSpeed;
    public int wallDamage;

    [Header("落地眩晕")]
    public bool willBeComa;
    public float willComaTime;
    public int comaDamage;

    [Header("敌方英灵")]
    public Spirits.SpiritType type;

    [Header("敌方单位组件")]
    public SearchState searchState;

    [Header("攻击")]
    public float attackDistance;
    public float maxAttackDis, minAttackDis;
    public bool needToChange;
    public float attackRatio;
    private int curAttackID;
    private AttackController.AttackMethod[] am;
    private int len;

    [Header("掉落魂")]
    public int dropSoulMax = 3;
    public int dropSoulMin = 1;
    public float dropSoulAngle = 60f;

    [Header("验证功能开关")]
    public bool upFirstAfterWeaknessOrNot;  //虚弱结束后是否先升高

    private void Start()
    {
        if (needToChange)
        {
            attackDistance = Random.Range(minAttackDis, maxAttackDis);
        }
        am = attackController.attackMethod;
        len = am.Length;
    }

    private void OnEnable()
    {
        Init();
    }

    public void OnDisable()
    {
        EnemyCreater.instance.OnEnemyRecycle(this);
    }

    public override void Init()
    {
        base.Init();
        moveSpeed = Random.Range(minMoveSpeed, maxMoveSpeed);

        ChangeSearchState(SearchState.NoTarget);
    }

    public override void FixedUpdate()
    {
        OnSearchState();
        OnState();
    }

    public override Vector3 GetMoveDir()
    {
        Vector3 moveDir = Vector3.zero;
        if (canMove)
        {
            switch (searchState)
            {
                case SearchState.NoTarget:
                    if (TowerMap.myTowers.Count == 0)
                    {
                        moveDir = Vector3.right;
                        break;
                    }
                    float minDistance = Mathf.Infinity;
                    int id = -1;
                    for (int i = 0; i < TowerMap.myTowers.Count; i++)
                    {
                        Tower myTower = TowerMap.myTowers[i].GetComponent<Tower>();
                        if (transform.position.y >
                            myTower.transform.position.y + myTower.height)
                        {
                            continue;
                        }
                        float distance = Vector3.Distance(transform.position,
                            TowerMap.myTowers[i].transform.position);
                        if (distance < minDistance)
                        {
                            minDistance = distance;
                            id = i;
                        }
                    }
                    if (id == -1)
                    {
                        moveDir = Vector3.right;
                        break;
                    }
                    if (bodyTrans.position.x > TowerMap.myTowers[id].transform.position.x)
                    {
                        moveDir = Vector3.left;
                    }
                    else
                    {
                        moveDir = Vector3.right;
                    }

                    break;
                case SearchState.InSearchScope:
                    if (targetCharacter)
                    {
                        if (targetCharacter.transform.position.x - transform.position.x < 0)
                        {
                            moveDir = Vector3.left;
                        }
                        else
                        {
                            moveDir = Vector3.right;
                        }
                    }
                    else
                    {
                        moveDir = Vector3.zero;
                    }
                    break;
                case SearchState.InAttackScope:
                    if (targetCharacter)
                    {
                        if (targetCharacter.transform.position.x - transform.position.x < 0)
                        {
                            moveDir = Vector3.left;
                        }
                        else
                        {
                            moveDir = Vector3.right;
                        }
                    }
                    else
                    {
                        moveDir = Vector3.zero;
                    }
                    break;
                default:
                    break;
            }
        }
        if (!isBack)
        {
            return moveDir;
        }
        return -moveDir;
    }

    public bool GetAttack()
    {
        if (searchState == SearchState.InAttackScope)
        {
            return true;
        }
        return false;
    }

    public bool GetJump()
    {
        return false;
    }

    public bool AdjustHeight()
    {
        if (canFly)
        {
            if (transform.position.y - flyHeight > 0.1f)
            {
                Vector3 pos = transform.position;
                pos.y -= flyUpSpeed * Time.deltaTime;
                transform.position = pos;
                return false;
            }
            else if (transform.position.y - flyHeight < -0.1f)
            {
                Vector3 pos = transform.position;
                pos.y += flyUpSpeed * Time.deltaTime;
                transform.position = pos;
                return false;
            }
        }
        return true;
    }

    public override void OnState()
    {
        base.OnState();
        //hurtKeepTime -= Time.deltaTime;
        dieKeepTime -= Time.deltaTime;
        invincibleTime -= Time.deltaTime;
        weakTime -= Time.deltaTime;
        beRepelValue += Time.deltaTime;
        Vector3 leftDir = GetMoveDir();
        bool isAttack = GetAttack();

        switch (state)
        {
            case CharacterState.Idle:
                if (isAttack)
                {
                    Attack_march();
                    break;
                }
                if (!foot.TrigGround && !canFly)
                {
                    if (rb.velocity.y > 0)
                    {
                        ChangeState(CharacterState.Rise);
                        break;
                    }
                    else
                    {
                        ChangeState(CharacterState.Fall);
                        break;
                    }
                }
                if (leftDir.x > 0.3f || leftDir.x < -0.3f)
                {
                    ChangeState(CharacterState.Run);
                    break;
                }
                //rb.velocity = Vector3.zero;
                if (!upFirstAfterWeaknessOrNot)
                {
                    if (canFly)
                    {
                        rb.constraints = RigidbodyConstraints.FreezeRotation | RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezePositionY;
                        rb.useGravity = false;
                        AdjustHeight();
                    }
                }

                break;
            case CharacterState.Run:
                if (isAttack)
                {
                    Attack_march();
                    break;
                }
                if (!foot.TrigGround && !canFly)
                {
                    if (rb.velocity.y > 0)
                    {
                        ChangeState(CharacterState.Rise);
                        break;
                    }
                    else
                    {
                        ChangeState(CharacterState.Fall);
                        break;
                    }
                }
                if (leftDir.x < 0.3f && leftDir.x > -0.3f)
                {
                    ChangeState(CharacterState.Idle);
                    break;
                }
                if (leftDir.x > 0.3f)
                {
                    rb.velocity = Vector3.right * moveSpeed;
                    if (bodyTrans.localScale.x > 0)
                    {
                        Turn();
                    }
                }
                else if (leftDir.x < -0.3f)
                {
                    rb.velocity = Vector3.left * moveSpeed;
                    if (bodyTrans.localScale.x < 0)
                    {
                        Turn();
                    }
                }
                if (!upFirstAfterWeaknessOrNot)
                {
                    if (canFly)
                    {
                        rb.constraints = RigidbodyConstraints.FreezeRotation | RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezePositionY;
                        rb.useGravity = false;
                        AdjustHeight();
                    }

                }
                break;
            case CharacterState.Rush:
                if (isAttack)
                {
                    Attack_march();
                    break;
                }
                if (!foot.TrigGround && !canFly)
                {
                    if (rb.velocity.y > 0)
                    {
                        ChangeState(CharacterState.Rise);
                        break;
                    }
                    else
                    {
                        ChangeState(CharacterState.Fall);
                        break;
                    }
                }
                if (leftDir.x < 0.3f && leftDir.x > -0.3f)
                {
                    ChangeState(CharacterState.Idle);
                    break;
                }
                if (leftDir.x > 0.3f)
                {
                    //rb.velocity += Vector3.right * moveAcc * Time.deltaTime;
                    rb.velocity = Vector3.right * runSpeed;
                    //if (rb.velocity.x > maxMoveSpeed)
                    //{
                    //    rb.velocity = new Vector3(maxMoveSpeed, rb.velocity.y, rb.velocity.z);
                    //}
                    if (bodyTrans.localScale.x > 0)
                    {
                        Turn();
                    }
                }
                else if (leftDir.x < -0.3f)
                {
                    //rb.velocity -= Vector3.right * moveAcc * Time.deltaTime;
                    rb.velocity = Vector3.left * runSpeed;
                    //if (rb.velocity.x < -maxMoveSpeed)
                    //{
                    //    rb.velocity = new Vector3(-maxMoveSpeed, rb.velocity.y, rb.velocity.z);
                    //}
                    if (bodyTrans.localScale.x < 0)
                    {
                        Turn();
                    }
                }
                //AdjustHeight();
                break;
            case CharacterState.Rise:
                if (rb.velocity.y <= 0)
                {
                    ChangeState(CharacterState.Fall);
                    break;
                }
                rb.velocity += Vector3.up * extraRiseGravity * Time.deltaTime;
                break;
            case CharacterState.Fall:
                if (foot.TrigGround || canFly)
                {
                    if (willBeComa)
                    {
                        comaTime = willComaTime;
                        ChangeState(CharacterState.Coma);
                    }
                    else
                    {
                        ChangeState(CharacterState.Idle);
                    }
                    break;
                }
                Vector3 velocity = rb.velocity;
                velocity.y += extraFallGravity * Time.deltaTime;
                if (leftDir.x > 0.3f)
                {
                    velocity.x = moveSpeed;
                    if (bodyTrans.localScale.x > 0)
                    {
                        Turn();
                    }
                }
                else if (leftDir.x < -0.3f)
                {
                    velocity.x = -moveSpeed;
                    if (bodyTrans.localScale.x < 0)
                    {
                        Turn();
                    }
                }

                rb.velocity = velocity;
                break;
            case CharacterState.Attack:
                attackController.attackTime -= Time.deltaTime;
                attackController.attackKeyCount += Time.deltaTime;
                if (!attackController.isAttackTriggerOn && attackController.attackKeyCount >=
                    attackController.nextStartKeyTime && attackController.attackKeyCount <= attackController.nextEndKeyTime)
                {
                    attackController.isAttackTriggerOn = true;
                    attackController.attackTrigger.gameObject.SetActive(true);             
                }
                else if (attackController.isAttackTriggerOn && attackController.attackKeyCount >= attackController.nextEndKeyTime)
                {
                    attackController.isAttackTriggerOn = false;
                    attackController.attackTrigger.gameObject.SetActive(false);
                    attackController.SetNextKeyTimes();
                }
                if (attackController.attackTime <= 0)
                {
                    ChangeState(CharacterState.Idle);
                    break;
                }
                break;
            case CharacterState.Die:
                if (dieKeepTime <= 0)
                {
                    gameObject.SetActive(false);
                    break;
                }
                break;
            case CharacterState.Coma:
                pastComaTime += Time.deltaTime;
                if (pastComaTime >= comaTime)
                {
                    ChangeState(CharacterState.Idle);
                }
                break;
            case CharacterState.SpecialStatus:
                attributeStatus.SpecialStateEffect();
                break;
            default:
                break;
        }
    }

    public override void ChangeState(CharacterState newState)
    {
        if (state == newState)
        {
            return;
        }
        switch (state)
        {
            case CharacterState.Idle:
                break;
            case CharacterState.Run:
                rb.velocity = Vector3.zero;
                break;
            case CharacterState.Rush:
                rb.velocity = Vector3.zero;
                break;
            case CharacterState.Rise:
                if (!canFly)
                {
                    bodyCollider.SetActive(true);
                }
                break;
            case CharacterState.Fall:
                rb.velocity = Vector3.zero;
                break;
            //case CharacterState.Hurt:
            //    break;
            case CharacterState.Attack:
                break;
            case CharacterState.Die:
                isDie = false;
                break;
            case CharacterState.Float:
                canMove = true;
                break;
            case CharacterState.Coma:
                ani.Play("idle", 0, 0);
                if (canFly)
                {
                    rb.constraints = RigidbodyConstraints.FreezeRotation | RigidbodyConstraints.FreezePositionZ | RigidbodyConstraints.FreezePositionY;
                    rb.useGravity = false;
                }
                canMove = true;
                break;
            default:
                break;
        }
        CharacterState oldState = state;
        state = newState;
        switch (newState)
        {
            case CharacterState.Idle:
                ani.Play("idle", 0, 0);
                rb.velocity = Vector3.zero;
                //animalAni.SetInteger("state", (int)PlayerState.Idle);
                break;
            case CharacterState.Run:
                ani.Play("walk", 0, 0);
                //animalAni.SetInteger("state", (int)PlayerState.Walk);
                break;
            case CharacterState.Rush:
                ani.Play("rush", 0, 0);
                break;
            case CharacterState.Float:
                canMove = false;
                break;
            case CharacterState.Coma:
                if (willBeComa)
                {
                    BeHit(comaDamage, Vector3.zero, false, 0);
                }
                //ani.Play("Coma", 0, 0);
                ani.Play("weak", 0, 0);
                rb.velocity = Vector3.zero;
                pastComaTime = 0;
                if (canFly)
                {
                    rb.constraints = RigidbodyConstraints.FreezeRotation | RigidbodyConstraints.FreezePositionZ;
                    rb.useGravity = true;
                }
                break;
            case CharacterState.Attack:
                break;
            case CharacterState.Die:
                ani.Play("die", 0, 0);
                isDie = true;
                dieKeepTime = totalDieKeepTime;
                DropSouls();
                break;
            default:
                break;
        }
    }

    public void DropSouls()
    {
        int dropSoulNum = Random.Range(dropSoulMin, dropSoulMax + 1);
        if (dropSoulNum > 1)
        {
            for (int i = 0; i < dropSoulNum; i++)
            {
                float angleInterval = dropSoulAngle / (float)(dropSoulNum - 1);
                float angle = 90 + ((float)i - (float)(dropSoulNum - 1) / 2) * angleInterval;
                angle = angle / 180 * Mathf.PI;
                GameObject soulObj = PoolManager.Instantiate(soulPrefab, transform.position);
                Vector3 dir = new Vector3(Mathf.Cos(angle), Mathf.Sin(angle), 0);
                Soul soul = soulObj.GetComponent<Soul>();
                soul.Burst(dir * soulStartSpeed);
                soul.type = type;
            }
        }
        else
        {
            GameObject soulObj = PoolManager.Instantiate(soulPrefab, transform.position);
            Vector3 dir = Vector3.up;
            Soul soul = soulObj.GetComponent<Soul>();
            soul.Burst(dir * soulStartSpeed);
            soul.type = type;
        }
    }

    public void Jump()
    {
        SetUpSpeed(jumpSpeed);
        ani.Play("jump", 0, 0);
    }

    public void SetUpSpeed(float speed)
    {
        ChangeState(CharacterState.Rise);
        Vector3 velocity = rb.velocity;
        Vector3 leftDir = GetMoveDir();
        if (leftDir.x > 0.3f)
        {
            if (bodyTrans.localScale.x > 0)
            {
                Turn();
            }
        }
        else if (leftDir.x < -0.3f)
        {
            if (bodyTrans.localScale.x < 0)
            {
                Turn();
            }
        }
        velocity.y = speed;
        rb.velocity = velocity;
        //animalAni.SetInteger("state", (int)PlayerState.Rise);
    }

    public void ChangeSearchState(SearchState newState)
    {
        switch (searchState)
        {
            case SearchState.NoTarget:
                break;
            case SearchState.InSearchScope:
                break;
            case SearchState.InAttackScope:
                break;
            default:
                break;
        }
        searchState = newState;
        switch (searchState)
        {
            case SearchState.NoTarget:
                Character character0 = PlayersInput.instance[0];
                if (character0 && character0.attackController.beTargetCharacter.Exists(t => t == this))
                {
                    character0.attackController.beTargetCharacter.Remove(this);
                }
                targetCharacter = null;
                break;
            case SearchState.InSearchScope:
                break;
            case SearchState.InAttackScope:
                break;
            default:
                break;
        }
    }

    public bool SearchTarget()
    {
        targetCharacter = searchTrigger.GetMinDisTarget(attackController.targetTypes, attackController.canHitFly);

        if (targetCharacter != null)
        {
            Character character0 = PlayersInput.instance[0];
            Character character1 = PlayersInput.instance[1];
            if (targetCharacter == character0
                && !character0.attackController.beTargetCharacter.Exists(t => t == this))
            {
                character0.attackController.beTargetCharacter.Add(this);
            }
            if (targetCharacter == character1
                && !character1.attackController.beTargetCharacter.Exists(t => t == this))
            {
                character1.attackController.beTargetCharacter.Add(this);
            }
            return true;
        }
        else
        {
            return false;
        }
    }

    public void OnSearchState()
    {
        switch (searchState)
        {
            case SearchState.NoTarget:
                if (SearchTarget())
                {
                    ChangeSearchState(SearchState.InSearchScope);
                    break;
                }
                //向玩家基地移动
                break;
            case SearchState.InSearchScope:
                if (!SearchTarget())
                {
                    targetCharacter = null;
                    ChangeSearchState(SearchState.NoTarget);
                    break;
                }
                if (targetCharacter != null && Mathf.Abs(targetCharacter.transform.position.x - transform.position.x) <= attackDistance)
                {
                    ChangeSearchState(SearchState.InAttackScope);
                    break;
                }
                break;
            case SearchState.InAttackScope:
                if (targetCharacter != null)
                {
                    if (!targetCharacter.gameObject.activeInHierarchy || targetCharacter.isDie
                        || Mathf.Abs(targetCharacter.transform.position.x - transform.position.x) > attackDistance)
                    {
                        ChangeSearchState(SearchState.NoTarget);
                    }
                }
                else
                {
                    ChangeSearchState(SearchState.NoTarget);
                }
                break;
            default:
                break;
        }
    }

    public void Attack_summon()
    {
        attackController.Attack_summon();
        attackTarget = targetCharacter;
    }

    public virtual void Attack_march()
    {
        attackController.Attack_march(curAttackID);
        if (curAttackID + 1 < len)
        {
            curAttackID += 1;
        }
        else if (am[0].id == 0)
        {
            curAttackID = 1;
        }
        else
        {
            curAttackID = 0;
        }
        attackTarget = targetCharacter;
    }

    public void ChosePlayer()
    {
        float distance0 = Mathf.Infinity;
        float distance1 = Mathf.Infinity;
        PlayerController player0 = PlayersInput.instance[0];
        PlayerController player1 = PlayersInput.instance[1];
        if (player0 != null && !player0.isRevive && !player0.isBaseBtnOut)
        {
            distance0 = Mathf.Abs(player0.transform.position.x
                - transform.position.x);
        }
        if (player1 != null && !player1.isRevive && !player1.isBaseBtnOut)
        {
            distance1 = Mathf.Abs(player1.transform.position.x
                - transform.position.x);
        }
        if (distance0 == Mathf.Infinity && distance1 == Mathf.Infinity)
        {
            targetCharacter = null;
            return;
        }
        if (distance0 <= distance1)
        {
            targetCharacter = player0;
            if (!player0.attackController.beTargetCharacter.Exists(t => t == this))
            {
                player0.attackController.beTargetCharacter.Add(this);
            }

        }
        else
        {
            targetCharacter = player1;
            if (!player1.attackController.beTargetCharacter.Exists(t => t == this))
            {
                player1.attackController.beTargetCharacter.Add(this);
            }
        }
    }
}