using Core;
using Input;
using Minigames.Airplane.Abilities;
using Minigames.Airplane.Core;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Minigames.Airplane.UI
{
    /// <summary>
    /// UI button for activating airplane special abilities.
    /// Handles input, visual feedback, and cooldown display.
    /// Implements ITouchInputConsumer to properly handle hold/release for Jet ability.
    /// </summary>
    public class AirplaneAbilityButton : MonoBehaviour, ITouchInputConsumer
    {
        #region Inspector References
        
        [Header("UI Components")]
        [SerializeField] private Button button;
        [SerializeField] private Image abilityIcon;
        [SerializeField] private Image cooldownFill;
        [SerializeField] private TextMeshProUGUI cooldownText;
        
        [Header("Active State Visual")]
        [Tooltip("Visual element shown when ability is active (e.g., glowing border, pulsing overlay)")]
        [SerializeField] private GameObject activeStateVisual;
        
        [Header("Debug")]
        [SerializeField] private bool showDebugLogs;
        
        #endregion
        
        #region State
        
        private BaseAirplaneAbility currentAbility;
        private AirplaneController currentAirplane;
        private bool isHoldAbility; // Jet plane needs hold mechanic
        private bool isHolding; // Track if button is currently being held
        
        #endregion
        
        #region Lifecycle
        
        private void Awake()
        {
            if (button != null)
            {
                button.onClick.AddListener(OnButtonClick);
            }
            
            // Hide active state visual by default
            if (activeStateVisual != null)
            {
                activeStateVisual.SetActive(false);
            }
            
            // Hide by default
            gameObject.SetActive(false);
        }
        
        private void Update()
        {
            if (currentAbility == null) return;
            
            // Priority 1: Show active duration if ability is active
            if (currentAbility.IsActive && currentAbility.HasActiveDuration)
            {
                // NO fill during active duration - only text and active visual
                if (cooldownFill != null)
                {
                    cooldownFill.fillAmount = 0f;
                }
                
                // Show remaining active time
                if (cooldownText != null)
                {
                    cooldownText.text = $"{currentAbility.ActiveDurationRemaining:F1}s";
                }
            }
            // Priority 2: Show cooldown if on cooldown
            else if (currentAbility.IsOnCooldown)
            {
                // Fill always starts at 1 (full) and reduces to 0, regardless of actual cooldown duration
                float fillAmount = currentAbility.InitialCooldownDuration > 0f 
                    ? currentAbility.CooldownRemaining / currentAbility.InitialCooldownDuration 
                    : 0f;
                    
                if (cooldownFill != null)
                {
                    cooldownFill.fillAmount = fillAmount;
                }
                
                // Show timer text
                if (cooldownText != null)
                {
                    cooldownText.text = $"{currentAbility.CooldownRemaining:F1}s";
                }
            }
            else
            {
                // Normal state - fill at 0, no text
                if (cooldownFill != null)
                    cooldownFill.fillAmount = 0f;
                
                if (cooldownText != null)
                    cooldownText.text = "";
            }
        }
        
        private void OnDestroy()
        {
            // Unsubscribe from events
            if (currentAbility != null)
            {
                currentAbility.OnAbilityActivated -= HandleAbilityActivated;
                currentAbility.OnAbilityDeactivated -= HandleAbilityDeactivated;
                currentAbility.OnCooldownChanged -= HandleCooldownChanged;
                currentAbility.OnActiveDurationChanged -= HandleActiveDurationChanged;
            }
            
            // Unregister from input system
            if (InputManager.Instance != null)
            {
                InputManager.Instance.UnregisterOverrideConsumer(this);
            }
        }
        
        #endregion
        
        #region Public API
        
        /// <summary>
        /// Setup button with airplane and ability reference.
        /// </summary>
        public void Setup(AirplaneController airplane, BaseAirplaneAbility ability)
        {
            currentAirplane = airplane;
            currentAbility = ability;
            isHolding = false;
            
            // Set icon and show immediately
            if (abilityIcon != null && ability != null)
            {
                abilityIcon.sprite = ability.AbilityIcon;
                abilityIcon.enabled = true;
            }
            
            // Initialize cooldown display
            if (cooldownFill != null)
            {
                cooldownFill.fillAmount = 0f;
            }
            
            if (cooldownText != null)
            {
                cooldownText.text = "";
            }
            
            // Check if this is a hold ability (Jet or Drop - abilities with active duration that can be interrupted)
            isHoldAbility = ability is JetAbility || ability is DropAbility;
            
            // Subscribe to ability events
            if (ability != null)
            {
                ability.OnAbilityActivated += HandleAbilityActivated;
                ability.OnAbilityDeactivated += HandleAbilityDeactivated;
                ability.OnCooldownChanged += HandleCooldownChanged;
                ability.OnActiveDurationChanged += HandleActiveDurationChanged;
                
                if (showDebugLogs)
                {
                    Logging.Debug($"[AirplaneAbilityButton] Subscribed to ability events for: {ability.AbilityName}");
                }
            }
            
            // Show UI
            gameObject.SetActive(true);
            
            if (showDebugLogs)
            {
                Logging.Debug($"[AirplaneAbilityButton] Setup complete with ability: {ability?.AbilityName ?? "None"}, Hold: {isHoldAbility}");
            }
        }
        
        /// <summary>
        /// Hide and cleanup button.
        /// </summary>
        public void Hide()
        {
            if (currentAbility != null)
            {
                currentAbility.OnAbilityActivated -= HandleAbilityActivated;
                currentAbility.OnAbilityDeactivated -= HandleAbilityDeactivated;
                currentAbility.OnCooldownChanged -= HandleCooldownChanged;
                currentAbility.OnActiveDurationChanged -= HandleActiveDurationChanged;
            }
            
            // Unregister from input system
            if (InputManager.Instance != null)
            {
                InputManager.Instance.UnregisterOverrideConsumer(this);
            }
            
            // Hide active state visual
            HideActiveState();
            
            currentAbility = null;
            currentAirplane = null;
            isHolding = false;
            gameObject.SetActive(false);
        }
        
        #endregion
        
        #region Input Handling
        
        private void OnButtonClick()
        {
            if (currentAirplane == null || currentAbility == null) return;
            if (!currentAbility.CanActivate) return;
            
            // Activate ability
            currentAirplane.ActivateAbility();
            
            // For hold abilities (Jet), mark as holding and register for input
            if (isHoldAbility)
            {
                isHolding = true;
                
                // Register as override consumer to receive hold/release events
                if (InputManager.Instance != null)
                {
                    InputManager.Instance.RegisterOverrideConsumer(this);
                }
                
                if (showDebugLogs)
                {
                    Logging.Debug("[AirplaneAbilityButton] Started holding ability, registered for input");
                }
            }
            
            // For non-hold abilities (Bobbing, Drop), this is all we need
        }
        
        #endregion
        
        #region Event Handlers
        
        private void HandleAbilityActivated(BaseAirplaneAbility ability)
        {
            // Show active state visual if ability has active duration
            if (ability.HasActiveDuration)
            {
                ShowActiveState();
            }
            
            if (showDebugLogs)
            {
                Logging.Debug($"[AirplaneAbilityButton] Ability activated: {ability.AbilityName}");
            }
        }
        
        private void HandleAbilityDeactivated(BaseAirplaneAbility ability)
        {
            // Hide active state visual
            HideActiveState();
            
            if (showDebugLogs)
            {
                Logging.Debug($"[AirplaneAbilityButton] Ability deactivated: {ability.AbilityName}");
            }
        }
        
        private void HandleCooldownChanged(float remaining, float total)
        {
            if (showDebugLogs)
            {
                Logging.Debug($"[AirplaneAbilityButton] OnCooldownChanged: remaining={remaining:F2}, total={total:F2}");
            }
            
            // When cooldown starts (remaining == total), set fill to 1
            if (remaining >= total - 0.01f && cooldownFill != null)
            {
                cooldownFill.fillAmount = 1f;
                
                if (showDebugLogs)
                {
                    Logging.Debug($"[AirplaneAbilityButton] Cooldown started: {total}s, fill set to 1");
                }
            }
        }
        
        private void HandleActiveDurationChanged(float remaining, float total)
        {
            if (showDebugLogs)
            {
                Logging.Debug($"[AirplaneAbilityButton] OnActiveDurationChanged: remaining={remaining:F2}, total={total:F2}");
            }
        }
        
        #endregion
        
        #region ITouchInputConsumer Implementation
        
        public void OnTap(Vector2 position)
        {
            // If Jet ability is active (holding), next tap anywhere deactivates it
            if (isHoldAbility && isHolding)
            {
                isHolding = false;
                currentAirplane?.DeactivateAbility();
                
                // Unregister from input system after tap
                if (InputManager.Instance != null)
                {
                    InputManager.Instance.UnregisterOverrideConsumer(this);
                }
                
                if (showDebugLogs)
                {
                    Logging.Debug("[AirplaneAbilityButton] Tap detected - deactivated Jet ability, unregistered");
                }
            }
            // Handle as button click for non-hold abilities
            else if (!isHoldAbility)
            {
                OnButtonClick();
            }
        }
        
        public void OnHoldStart(Vector2 position)
        {
            // Not used - button click handles activation, tap handles deactivation
        }
        
        public void OnHoldMove(Vector2 position)
        {
            // Not used
        }
        
        public void OnHoldEnd(Vector2 position)
        {
            // Not used - tap handles deactivation for Jet ability
        }
        
        #endregion
        
        #region Active State Visual API
        
        /// <summary>
        /// Show active state visual (placeholder API).
        /// Override or assign activeStateVisual GameObject in inspector for custom visuals.
        /// </summary>
        private void ShowActiveState()
        {
            if (activeStateVisual != null)
            {
                activeStateVisual.SetActive(true);
                
                if (showDebugLogs)
                {
                    Logging.Debug("[AirplaneAbilityButton] Active state visual shown");
                }
            }
        }
        
        /// <summary>
        /// Hide active state visual (placeholder API).
        /// </summary>
        private void HideActiveState()
        {
            if (activeStateVisual != null)
            {
                activeStateVisual.SetActive(false);
                
                if (showDebugLogs)
                {
                    Logging.Debug("[AirplaneAbilityButton] Active state visual hidden");
                }
            }
        }
        
        #endregion
    }
}