using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace DepthsOfGreed.HandbookUI
{
    public sealed class BuildMenuController : MonoBehaviour
    {
        public TestPlacementController Placement { get; set; }
        private readonly List<TowerCardView> cards = new List<TowerCardView>();
        private Button[] categories;
        private int selectedCategory = -1;
        private TowerCardView revealed;
        private HandbookTowerEntry[][] entries;

        public void Initialize(HandbookTowerCatalog catalog)
        {
            categories = new[] {
                transform.Find("LeftPage/CategoryBar/Category_Ammo").GetComponent<Button>(),
                transform.Find("LeftPage/CategoryBar/Category_Energy").GetComponent<Button>(),
                transform.Find("LeftPage/CategoryBar/Category_Special").GetComponent<Button>()
            };
            var left = transform.Find("LeftPage/Cards_Left");
            var right = transform.Find("RightPage/Cards_Right");
            int count = Mathf.Max(left.childCount, right.childCount);
            for (int i = 0; i < count; i++)
            {
                if (i < left.childCount) AddCard(left.GetChild(i));
                if (i < right.childCount) AddCard(right.GetChild(i));
            }
            var groups = new[] { new List<HandbookTowerEntry>(), new List<HandbookTowerEntry>(), new List<HandbookTowerEntry>() };
            if (catalog && catalog.towers != null)
                foreach (var entry in catalog.towers)
                    if (entry) groups[(int)entry.category].Add(entry);
            entries = new[] { groups[0].ToArray(), groups[1].ToArray(), groups[2].ToArray() };
            foreach (var group in groups)
                if (group.Count > cards.Count)
                    Debug.LogWarning("Handbuch: Mehr Turmtypen als Kartenplätze in einer Kategorie.", this);
            for (int i = 0; i < categories.Length; i++)
            {
                int index = i;
                categories[i].onClick.AddListener(() => SelectCategory(index));
            }
            SelectCategory(0);
        }

        private void AddCard(Transform card)
        {
            var view = card.gameObject.AddComponent<TowerCardView>();
            view.Initialize(this);
            cards.Add(view);
        }

        public void SelectCategory(int index)
        {
            if (index == selectedCategory) return;
            selectedCategory = index;
            revealed = null;
            for (int i = 0; i < cards.Count; i++)
            {
                cards[i].SetBack(false, true);
                bool visible = i < entries[index].Length;
                cards[i].gameObject.SetActive(visible);
                if (visible) cards[i].Bind(entries[index][i]);
            }
            for (int i = 0; i < categories.Length; i++)
            {
                var colors = categories[i].colors;
                colors.normalColor = i == index ? new Color(1f, 0.72f, 0.2f) : new Color(0.82f, 0.82f, 0.82f);
                colors.highlightedColor = i == index ? new Color(1f, 0.82f, 0.4f) : Color.white;
                colors.selectedColor = colors.normalColor;
                colors.pressedColor = new Color(0.7f, 0.7f, 0.7f);
                categories[i].colors = colors;
                categories[i].image.color = Color.white;
            }
        }

        public void ToggleCard(TowerCardView card)
        {
            if (revealed == card)
            {
                card.SetBack(false);
                revealed = null;
                return;
            }
            if (revealed) revealed.SetBack(false);
            revealed = card;
            card.SetBack(true);
        }

        public void ResetCards()
        {
            revealed = null;
            foreach (var card in cards) card.SetBack(false, true);
        }

        public void ResetForClose()
        {
            ResetCards();
            SelectCategory(0);
        }
    }
}