using Core;
using Core.Lifecycle;
using Minigames.FortFight.Core;
using Minigames.FortFight.Data;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Minigames.FortFight.UI
{
    /// <summary>
    /// Generic reusable ammunition button that displays projectile data.
    /// Shows icon, availability state, cooldown progress, and turns remaining.
    /// </summary>
    public class AmmoButton : ManagedBehaviour
    {
        #region Inspector References
        
        [Header("UI Components")]
        [Tooltip("Icon image for the projectile")]
        [SerializeField] private Image iconImage;
        
        [Tooltip("Background overlay that greys out the entire button when on cooldown")]
        [SerializeField] private Image cooldownBackgroundImage;
        
        [Tooltip("Radial fill overlay for cooldown visualization")]
        [SerializeField] private Image cooldownFillImage;
        
        [Tooltip("Text displaying turns remaining")]
        [SerializeField] private TextMeshProUGUI turnsRemainingText;
        
        [Tooltip("Button component")]
        [SerializeField] private Button button;
        
        [Tooltip("Visual indicator for selected state (optional border/glow)")]
        [SerializeField] private GameObject selectedIndicator;
        
        #endregion
        
        #region State
        
        private ProjectileConfig projectileConfig;
        private AmmunitionManager ammunitionManager;
        private SlingshotController slingshotController;
        private int playerIndex;
        private bool isSelected;
        
        #endregion
        
        #region Initialization
        
        /// <summary>
        /// Initialize the button with projectile config and system references.
        /// Call this after instantiation to configure the button.
        /// </summary>
        public void Initialize(ProjectileConfig config, AmmunitionManager ammoManager, SlingshotController slingshot, int playerIdx)
        {
            projectileConfig = config;
            ammunitionManager = ammoManager;
            slingshotController = slingshot;
            playerIndex = playerIdx;
            
            // Setup UI from projectile config
            if (iconImage != null && config.icon != null)
            {
                iconImage.sprite = config.icon;
            }
            
            // Setup cooldown background (hidden by default)
            if (cooldownBackgroundImage != null)
            {
                cooldownBackgroundImage.gameObject.SetActive(false);
            }
            
            // Setup cooldown fill (hidden by default)
            if (cooldownFillImage != null)
            {
                cooldownFillImage.fillAmount = 0f;
                cooldownFillImage.type = Image.Type.Filled;
                cooldownFillImage.fillMethod = Image.FillMethod.Radial360;
                cooldownFillImage.fillOrigin = (int)Image.Origin360.Top;
                cooldownFillImage.gameObject.SetActive(false);
            }
            
            // Setup turns text (hidden by default)
            if (turnsRemainingText != null)
            {
                turnsRemainingText.gameObject.SetActive(false);
            }
            
            // Setup button
            if (button != null)
            {
                button.onClick.AddListener(OnButtonClicked);
            }
            
            // Subscribe to ammunition events
            if (ammunitionManager != null)
            {
                ammunitionManager.OnAmmoSelected += HandleAmmoSelected;
                ammunitionManager.OnAmmoCooldownStarted += HandleCooldownStarted;
                ammunitionManager.OnAmmoCooldownCompleted += HandleCooldownCompleted;
            }
            
            // Initial update
            UpdateVisuals();
        }
        
        internal override void OnManagedDestroy()
        {
            base.OnManagedDestroy();
            
            // Unsubscribe from events
            if (ammunitionManager != null)
            {
                ammunitionManager.OnAmmoSelected -= HandleAmmoSelected;
                ammunitionManager.OnAmmoCooldownStarted -= HandleCooldownStarted;
                ammunitionManager.OnAmmoCooldownCompleted -= HandleCooldownCompleted;
            }
            
            // Remove button listener
            if (button != null)
            {
                button.onClick.RemoveListener(OnButtonClicked);
            }
        }
        
        #endregion
        
        #region Update
        
        private void Update()
        {
            // Update visuals every frame
            UpdateVisuals();
        }
        
        /// <summary>
        /// Update all visual elements based on current state
        /// </summary>
        private void UpdateVisuals()
        {
            if (projectileConfig == null || ammunitionManager == null) return;
            
            // Get current cooldown state for this player
            int turnsRemaining = ammunitionManager.GetCooldownRemaining(projectileConfig.projectileType, playerIndex);
            bool isAvailable = ammunitionManager.IsAmmoAvailable(projectileConfig.projectileType, playerIndex);
            bool onCooldown = turnsRemaining > 0;
            
            // Show/hide cooldown background overlay
            if (cooldownBackgroundImage != null)
            {
                cooldownBackgroundImage.gameObject.SetActive(onCooldown);
            }
            
            // Update cooldown fill (0 = no fill, 1 = full fill)
            if (cooldownFillImage != null)
            {
                if (onCooldown && projectileConfig.cooldownTurns > 0)
                {
                    float fillAmount = (float)turnsRemaining / projectileConfig.cooldownTurns;
                    cooldownFillImage.fillAmount = fillAmount;
                    cooldownFillImage.gameObject.SetActive(true);
                }
                else
                {
                    cooldownFillImage.gameObject.SetActive(false);
                }
            }
            
            // Update turns remaining text
            if (turnsRemainingText != null)
            {
                if (onCooldown)
                {
                    turnsRemainingText.text = turnsRemaining.ToString();
                    turnsRemainingText.gameObject.SetActive(true);
                }
                else
                {
                    turnsRemainingText.gameObject.SetActive(false);
                }
            }
            
            // Update button interactability
            if (button != null)
            {
                button.interactable = isAvailable;
            }
            
            // Update selected indicator
            if (selectedIndicator != null)
            {
                selectedIndicator.SetActive(isSelected);
            }
        }
        
        #endregion
        
        #region Button Click
        
        /// <summary>
        /// Called when button is clicked - selects this ammo type
        /// </summary>
        private void OnButtonClicked()
        {
            if (projectileConfig == null || ammunitionManager == null) return;
            
            // Try to select this ammo type for this player
            bool selected = ammunitionManager.SelectAmmo(projectileConfig.projectileType, playerIndex);
            
            if (selected && slingshotController != null)
            {
                // Update slingshot with new ammo config
                slingshotController.SetAmmo(projectileConfig);
                
                Logging.Debug($"[AmmoButton] Player {playerIndex} selected {projectileConfig.displayName}");
            }
        }
        
        #endregion
        
        #region Event Handlers
        
        private void HandleAmmoSelected(ProjectileType selectedType, int selectedPlayerIndex)
        {
            // Only update if this event is for our player
            if (selectedPlayerIndex != playerIndex)
                return;
            
            // Update selected state - check if this is our player's current selection
            isSelected = (selectedType == projectileConfig.projectileType);
        }
        
        private void HandleCooldownStarted(ProjectileType type, int cooldownTurns)
        {
            // Visual update handled in UpdateVisuals()
        }
        
        private void HandleCooldownCompleted(ProjectileType type)
        {
            // Visual update handled in UpdateVisuals()
            if (type == projectileConfig.projectileType)
            {
                Logging.Debug($"[AmmoButton] {projectileConfig.displayName} ready!");
            }
        }
        
        #endregion
    }
}