using UnityEngine;
using System.Collections;
using DamageNumbersPro;
using UnityEditor.Embree;

public class MonsterController : MonoBehaviour
{
    public MonsterData data;
    public MonsterFormationGroup formationGroup;

    private MonsterAnimatorController animator;
    private Vector3 currentTarget;
    public int currentHP;
    private float attackTimer = 0f;
    public float rotationSpeed = 40f;

    public DamageNumber damagePopupPrefab;
    public GameObject goldBagPrefab;
    public Transform goldSpawnPoint;
    public float goldDropYOffset = 0.15f;

    private void Start()
    {
        animator = GetComponent<MonsterAnimatorController>();
        currentHP = data.maxHP;

        if (data != null)
        {
            attackTimer = data.attackCooldown;
        }

        FindFirstObjectByType<CombatManager>()?.RegisterMonster(this);
    }

    public void ShowDamageNumber(float amount)
    {
        if (damagePopupPrefab == null) return;

        Vector3 popupPosition = transform.position + Vector3.up * 2f;
        DamageNumber newPopup = damagePopupPrefab.Spawn(popupPosition, amount);

        if (newPopup != null)
        {
            Transform cameraTransform = Camera.main?.transform;

            if (cameraTransform != null)
            {
                Vector3 cameraEuler = cameraTransform.eulerAngles;
                newPopup.transform.rotation = Quaternion.Euler(0f, cameraEuler.y, 0f);
            }
        }
    }

    public void MoveTo(Vector3 newPosition)
    {
        currentTarget = newPosition;
        StopAllCoroutines();
        StartCoroutine(MoveStep());
    }

    IEnumerator MoveStep()
    {
        animator?.PlayMove();

        while (Vector3.Distance(transform.position, currentTarget) > 0.05f)
        {
            transform.position = Vector3.MoveTowards(transform.position, currentTarget, data.moveSpeed * Time.deltaTime);
            yield return null;
        }

        animator?.StopMove();
    }

    public void FaceTarget(Vector3 target, bool instant = false)
    {
        Vector3 direction = (target - transform.position).normalized;
        direction.y = 0;
        if (direction != Vector3.zero)
        {
            Quaternion targetRotation = Quaternion.LookRotation(direction);

            if (instant)
            {
                transform.rotation = targetRotation;
            }
            else
            {
                transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, Time.deltaTime * rotationSpeed);
            }
        }
    }

    public bool IsFacingTarget(Vector3 target, float angleThreshold = 30f)
    {
        Vector3 directionToTarget = (target - transform.position).normalized;
        directionToTarget.y = 0;

        if (directionToTarget == Vector3.zero) return true;

        float angle = Vector3.Angle(transform.forward, directionToTarget);
        return angle <= angleThreshold;
    }

    public void StopMove()
    {
        animator?.StopMove();
    }


    public void Attack()
    {
        animator?.PlayAttack();
    }

    public void UpdateAttackTimer(float deltaTime)
    {
        attackTimer += deltaTime;
    }

    public bool CanAttack()
    {
        return attackTimer >= data.attackCooldown;
    }

    public void ResetAttackTimer()
    {
        attackTimer = 0f;
    }

    public int GetDamage()
    {
        if (Random.value < data.missChance)
        {
            return 0;
        }

        float min = data.attackDamage / 2f;
        float max = data.attackDamage * 1.5f;
        int damage = Mathf.RoundToInt(Random.Range(min, max));
        return damage;
    }

    public void TakeDamage(int amount)
    {
        currentHP -= amount;

        ShowDamageNumber(amount);

        if (currentHP <= 0)
        {
            Die();
        }
        else
        {
            animator?.PlayHurt();
        }
    }


    public void Die()
    {
        animator?.PlayDeath();

        Collider collider = GetComponent<Collider>();
        if (collider != null)
        {
            collider.enabled = false;
        }

        GrantExperienceToParty();

        StartCoroutine(CoroutineDropGoldBag());

        formationGroup?.NotifyMonsterDeath(this);
        Destroy(gameObject, 2f);
    }

    private IEnumerator CoroutineDropGoldBag()
    {   
        if (Random.value < 0.5f)
        {
            if (goldBagPrefab != null)
            {
                Vector3 dropPosition;
                if (goldSpawnPoint != null)
                {
                    dropPosition = goldSpawnPoint.position + Vector3.up * goldDropYOffset;
                }
                else
                {
                    dropPosition = transform.position + Vector3.up * goldDropYOffset;
                }
                
                GameObject goldBag = Instantiate(goldBagPrefab, dropPosition, Quaternion.Euler(-90f, 0f, 0f));
            }
        }
        yield return null;
    }

    private void GrantExperienceToParty()
    {
        TeamCohesionManager cohesionManager = FindFirstObjectByType<TeamCohesionManager>();
        if (cohesionManager == null || data == null) return;

        int expPerMember = Mathf.RoundToInt(data.exp);

        foreach (var character in cohesionManager.groupMembers)
        {
            character.experience += expPerMember;

            // Update the experience bar
            UIUpdater.Instance?.UpdateCharacterExperience(character);
            // Check for level up
            CheckLevelUp(character);
        }
    }

    private void CheckLevelUp(CharacterInGroup character)
    {
        while (character.experience >= 100)
        {
            character.experience -= 100;
            character.level++;

            int hpIncrease = 5 + character.constitution;
            int staminaIncrease = 5 + (character.constitution / 2);

            character.maxHP += hpIncrease;
            character.currentHP += hpIncrease;
            character.maxFatigue += staminaIncrease;
            character.currentFatigue += staminaIncrease;

            UIUpdater.Instance?.UpdateCharacterHP(character);
            UIUpdater.Instance?.UpdateCharacterFatigue(character);
            UIUpdater.Instance?.UpdateCharacterExperience(character);
        }
    }

    public void Setup(MonsterGroupManager mgr) { }
}