using UnityEngine;
using UnityEngine.Events;

public class PlayerStats : MonoBehaviour
{
    [Header("Health")]
    public float maxHealth = 100f;
    public float currentHealth;

    [Header("Mana")]
    public float maxMana = 100f;
    public float currentMana;

    [Header("Stamina")]
    public float maxStamina = 100f;
    public float currentStamina;
    public float staminaRegenRate = 15f;
    public float staminaRegenDelay = 1.5f;

    [Header("Events")]
    public UnityEvent onDeath;

    private float _lastStaminaUseTime;
    private bool _isDead;

    private void Awake()
    {
        currentHealth = maxHealth;
        currentMana = maxMana;
        currentStamina = maxStamina;
    }

    public float sprintStaminaDrainRate = 10f;
    [Tooltip("Optional: Drag the InputReader here to automatically drain stamina when sprinting")]
    public Synty.AnimationBaseLocomotion.Samples.InputSystem.InputReader inputReader;

    private bool _isSprinting;

    private float _regenPauseEndTime;
    [HideInInspector] public float staminaRegenMultiplier = 1f;

    public void PauseStaminaRegen(float seconds)
    {
        _regenPauseEndTime = Time.time + seconds;
    }

    private void OnEnable()
    {
        if (inputReader != null)
        {
            inputReader.onSprintActivated += HandleSprintStart;
            inputReader.onSprintDeactivated += HandleSprintStop;
        }
    }

    private void OnDisable()
    {
        if (inputReader != null)
        {
            inputReader.onSprintActivated -= HandleSprintStart;
            inputReader.onSprintDeactivated -= HandleSprintStop;
        }
    }

    private void HandleSprintStart() => _isSprinting = true;
    private void HandleSprintStop() => _isSprinting = false;

    private void Update()
    {
        if (_isDead) return;

        // Drain stamina if sprinting and moving
        if (_isSprinting && inputReader != null && inputReader._movementInputDetected)
        {
            UseStamina(sprintStaminaDrainRate * Time.deltaTime);
            
            // If we run out of stamina while sprinting, you might want to force walk here
            if (currentStamina <= 0)
            {
                // Force sprint off via the reader
                _isSprinting = false;
                // Note: To perfectly force the Synty controller to stop running, 
                // you would normally call a method on the SamplePlayerAnimationController.
            }
        }
        else
        {
            // Regenerate stamina if we haven't used it recently and not paused
            if (Time.time > _lastStaminaUseTime + staminaRegenDelay && Time.time > _regenPauseEndTime)
            {
                if (currentStamina < maxStamina)
                {
                    currentStamina += (staminaRegenRate * staminaRegenMultiplier) * Time.deltaTime;
                    currentStamina = Mathf.Clamp(currentStamina, 0f, maxStamina);
                }
            }
        }
    }

    public void TakeDamage(float amount)
    {
        if (_isDead) return;

        currentHealth -= amount;
        currentHealth = Mathf.Clamp(currentHealth, 0f, maxHealth);

        if (currentHealth <= 0)
        {
            Die();
        }
    }

    public void Heal(float amount)
    {
        if (_isDead) return;
        currentHealth += amount;
        currentHealth = Mathf.Clamp(currentHealth, 0f, maxHealth);
    }

    /// <summary>
    /// Attempts to use stamina.
    /// </summary>
    public void UseStamina(float amount)
    {
        currentStamina -= amount;
        currentStamina = Mathf.Clamp(currentStamina, 0f, maxStamina);
        _lastStaminaUseTime = Time.time;
    }

    public bool HasStaminaPercentage(float percentage)
    {
        return currentStamina >= (maxStamina * percentage);
    }

    private void Die()
    {
        _isDead = true;
        Debug.Log("Player has died!");
        onDeath?.Invoke();
    }
}