using System;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.InputSystem;
using UnityEngine.UI;
using RR.Common.Managers;
using RR.Common.Prizes;

namespace RR.Common.UI
{
    /// <summary>
    /// Модальное окно настройки приза за конкретный уровень.
    /// Для QR настраивает ранг на уровне, для витрины редактирует общую игровую конфигурацию.
    /// </summary>
    public class LevelPrizeSettingsModal : Modal
    {
        [Header("UI — Общее")]
        [SerializeField] private TMP_Text titleText;
        [SerializeField] private TMP_Text prizeTypeLabel;
        [SerializeField] private TMP_Text detailsText;

        [Header("UI — QR")]
        [SerializeField] private GameObject qrParamsGroup;
        [SerializeField] private TMP_Text qrTierLabel;

        [Header("UI — Параметры хоппера")]
        [SerializeField] private GameObject hopperParamsGroup;
        [SerializeField] private TMP_Text hopperCapsuleCountLabel;

        [Header("UI — Параметры витрины")]
        [SerializeField] private GameObject prizeStandParamsGroup;
        [SerializeField] private TMP_Text prizeStandStatusLabel;
        [SerializeField] private TMP_Text prizeStandBoxCountLabel;
        [SerializeField] private TMP_Text prizeStandSelectedBoxLabel;
        [SerializeField] private TMP_Text prizeStandThresholdLabel;

        [Header("Строки (RectTransform)")]
        [SerializeField] private RectTransform prizeTypeRow;
        [SerializeField] private RectTransform qrTierRow;
        [SerializeField] private RectTransform hopperParamRow;
        [SerializeField] private RectTransform prizeStandBoxCountRow;
        [SerializeField] private RectTransform prizeStandSelectedBoxRow;
        [SerializeField] private RectTransform prizeStandThresholdRow;

        [Header("Указатель")]
        [SerializeField] private UIRowPointer rowPointer;

        [Header("Кнопка закрытия")]
        [SerializeField] private Button closeModalButton;

        [Header("Навигация (Input System)")]
        [SerializeField] private InputActionReference navigateAction;
        [SerializeField] private float deadZone = 0.5f;

        [Header("Лимиты")]
        [SerializeField] private int maxCapsules = 10;
        [SerializeField] private int maxBoxes = 48;
        [SerializeField] private int defaultPrizeStandBoxesCount = 5;
        [SerializeField] private int scoreStep = 50;

        private const int ROW_TYPE = 0;
        private const int ROW_QR_TIER = 1;
        private const int ROW_HOPPER_PARAM = 2;
        private const int ROW_STAND_BOX_COUNT = 3;
        private const int ROW_STAND_SELECTED_BOX = 4;
        private const int ROW_STAND_THRESHOLD = 5;
        private const int ROW_CLOSE = 6;
        private const int ROW_COUNT = 7;

        private static readonly PrizeType[] PrizeTypes = (PrizeType[])Enum.GetValues(typeof(PrizeType));
        private static readonly QRTier[] QRTiers = { QRTier.Bronze, QRTier.Silver, QRTier.Gold };

        private string _levelName;
        private LevelPrizeConfig _config;
        private PrizeStandSettings _prizeStandSettings;
        private int _currentTypeIndex;
        private int _currentTierIndex;
        private int _activeRow;
        private int _selectedPrizeStandBoxIndex;
        private bool _axisHeldX;
        private bool _axisHeldY;

        public event Action<string> OnApplied;

        protected override void OnEnable()
        {
            base.OnEnable();

            if (navigateAction != null && navigateAction.action != null)
            {
                navigateAction.action.Enable();
                navigateAction.action.performed += OnNavigatePerformed;
                navigateAction.action.canceled += OnNavigateCanceled;
            }
        }

        protected override void OnDisable()
        {
            if (navigateAction != null && navigateAction.action != null)
            {
                navigateAction.action.performed -= OnNavigatePerformed;
                navigateAction.action.canceled -= OnNavigateCanceled;
            }

            _axisHeldX = false;
            _axisHeldY = false;
            base.OnDisable();
        }

        protected override void OnReturnedToTop()
        {
            _axisHeldX = false;
            _axisHeldY = false;
            RefreshRowHighlights();
        }

        private void OnNavigatePerformed(InputAction.CallbackContext ctx)
        {
            if (!_isOpen) return;

            Vector2 v = ctx.ReadValue<Vector2>();

            if (Mathf.Abs(v.y) >= deadZone)
            {
                if (!_axisHeldY)
                {
                    _axisHeldY = true;
                    MoveRow(v.y > 0f ? -1 : 1);
                }
            }
            else
            {
                _axisHeldY = false;
            }

            if (Mathf.Abs(v.x) >= deadZone)
            {
                if (!_axisHeldX)
                {
                    _axisHeldX = true;
                    HandleLeftRight(v.x > 0f ? 1 : -1);
                }
            }
            else
            {
                _axisHeldX = false;
            }
        }

        private void OnNavigateCanceled(InputAction.CallbackContext ctx)
        {
            _axisHeldX = false;
            _axisHeldY = false;
        }

        private void MoveRow(int delta)
        {
            int next = _activeRow;
            for (int i = 0; i < ROW_COUNT; i++)
            {
                next = (next + delta + ROW_COUNT) % ROW_COUNT;
                if (IsRowVisible(next))
                {
                    _activeRow = next;
                    break;
                }
            }

            RefreshRowHighlights();
        }

        private bool IsRowVisible(int row)
        {
            return row switch
            {
                ROW_QR_TIER => _config.type == PrizeType.QRCode,
                ROW_HOPPER_PARAM => _config.type == PrizeType.Hopper,
                ROW_STAND_BOX_COUNT => _config.type == PrizeType.PrizeStand,
                ROW_STAND_SELECTED_BOX => _config.type == PrizeType.PrizeStand && GetPrizeStandBoxes().Count > 0,
                ROW_STAND_THRESHOLD => _config.type == PrizeType.PrizeStand && GetPrizeStandBoxes().Count > 0,
                _ => true
            };
        }

        private void HandleLeftRight(int direction)
        {
            switch (_activeRow)
            {
                case ROW_TYPE:
                    CyclePrizeType(direction);
                    break;
                case ROW_QR_TIER:
                    AdjustQrTier(direction);
                    break;
                case ROW_HOPPER_PARAM:
                    AdjustCapsules(direction);
                    break;
                case ROW_STAND_BOX_COUNT:
                    AdjustPrizeStandBoxCount(direction);
                    break;
                case ROW_STAND_SELECTED_BOX:
                    AdjustSelectedPrizeStandBox(direction);
                    break;
                case ROW_STAND_THRESHOLD:
                    AdjustPrizeStandThreshold(direction);
                    break;
            }
        }

        public void OpenForLevel(string levelName)
        {
            _levelName = levelName;

            PrizeDatabase db = PrizeSystemManager.Instance?.Database;
            _config = db != null
                ? CopyConfig(db.GetConfig(levelName))
                : new LevelPrizeConfig();
            _prizeStandSettings = db != null
                ? CopyPrizeStandSettings(db.GetPrizeStandSettings())
                : CreateDefaultPrizeStandSettings();

            EnsurePrizeStandSettingsInitialized();

            _currentTypeIndex = Array.IndexOf(PrizeTypes, _config.type);
            if (_currentTypeIndex < 0)
                _currentTypeIndex = 0;

            _currentTierIndex = GetTierIndex(_config.qrTier);
            _selectedPrizeStandBoxIndex = Mathf.Clamp(_selectedPrizeStandBoxIndex, 0, Mathf.Max(0, GetPrizeStandBoxes().Count - 1));
            _activeRow = ROW_TYPE;

            AutoResolveRows();
            RefreshUI();
            RefreshRowHighlights();
            Open();
        }

        public override void Close()
        {
            Save();
            base.Close();
        }

        private void CyclePrizeType(int direction)
        {
            _currentTypeIndex = (_currentTypeIndex + direction + PrizeTypes.Length) % PrizeTypes.Length;
            _config.type = PrizeTypes[_currentTypeIndex];

            if (_config.type == PrizeType.QRCode && _config.qrTier == QRTier.None)
                _config.qrTier = QRTiers[0];

            EnsurePrizeStandSettingsInitialized();
            if (!IsRowVisible(_activeRow))
                _activeRow = ROW_TYPE;

            RefreshUI();
            RefreshRowHighlights();
        }

        private void AdjustQrTier(int direction)
        {
            _currentTierIndex = (_currentTierIndex + direction + QRTiers.Length) % QRTiers.Length;
            _config.qrTier = QRTiers[_currentTierIndex];
            RefreshUI();
        }

        private void AdjustCapsules(int delta)
        {
            _config.hopperCapsuleCount = Mathf.Clamp(_config.hopperCapsuleCount + delta, 1, maxCapsules);
            RefreshUI();
        }

        private void AdjustPrizeStandBoxCount(int delta)
        {
            List<PrizeStandBoxConfig> boxes = GetPrizeStandBoxes();
            int currentCount = boxes.Count;
            int nextCount = Mathf.Clamp(currentCount + delta, 1, maxBoxes);
            if (nextCount == currentCount)
                return;

            if (nextCount > currentCount)
            {
                for (int i = currentCount + 1; i <= nextCount; i++)
                    boxes.Add(new PrizeStandBoxConfig { boxNumber = i, requiredScore = 0 });
            }
            else
            {
                boxes.RemoveRange(nextCount, currentCount - nextCount);
            }

            NormalizePrizeStandBoxes();
            _selectedPrizeStandBoxIndex = Mathf.Clamp(_selectedPrizeStandBoxIndex, 0, boxes.Count - 1);
            RefreshUI();
            RefreshRowHighlights();
        }

        private void AdjustSelectedPrizeStandBox(int delta)
        {
            List<PrizeStandBoxConfig> boxes = GetPrizeStandBoxes();
            if (boxes.Count == 0)
                return;

            _selectedPrizeStandBoxIndex = (_selectedPrizeStandBoxIndex + delta + boxes.Count) % boxes.Count;
            RefreshUI();
        }

        private void AdjustPrizeStandThreshold(int direction)
        {
            PrizeStandBoxConfig selectedBox = GetSelectedPrizeStandBox();
            if (selectedBox == null)
                return;

            selectedBox.requiredScore = Mathf.Max(0, selectedBox.requiredScore + direction * scoreStep);
            RefreshUI();
        }

        private void Save()
        {
            if (string.IsNullOrEmpty(_levelName) || _config == null)
                return;

            PrizeDatabase db = PrizeSystemManager.Instance?.Database;
            PrizeSystemManager manager = PrizeSystemManager.Instance;
            if (db == null || manager == null)
            {
                Debug.LogError("[LevelPrizeSettingsModal] PrizeDatabase недоступна.");
                return;
            }

            db.SetConfig(_levelName, _config);
            manager.SetPrizeStandSettings(_prizeStandSettings);
            Debug.Log($"[LevelPrizeSettingsModal] Уровень «{_levelName}» → приз «{_config.type}» сохранён.");
            OnApplied?.Invoke(_levelName);
        }

        private void RefreshUI()
        {
            EnsurePrizeStandSettingsInitialized();

            if (titleText)
                titleText.text = $"Приз за уровень {_levelName}";

            if (prizeTypeLabel)
                prizeTypeLabel.text = GetPrizeTypeName(_config.type);

            if (qrParamsGroup) qrParamsGroup.SetActive(_config.type == PrizeType.QRCode);
            if (hopperParamsGroup) hopperParamsGroup.SetActive(_config.type == PrizeType.Hopper);
            if (prizeStandParamsGroup) prizeStandParamsGroup.SetActive(_config.type == PrizeType.PrizeStand);

            if (qrTierLabel)
                qrTierLabel.text = GetTierName(_config.qrTier);

            if (hopperCapsuleCountLabel)
                hopperCapsuleCountLabel.text = _config.hopperCapsuleCount.ToString();

            PrizeStandConnectionInfo connectionInfo = PrizeSystemManager.Instance != null
                ? PrizeSystemManager.Instance.GetPrizeStandConnectionInfo()
                : new PrizeStandConnectionInfo(false, 0);
            List<PrizeStandBoxConfig> boxes = GetPrizeStandBoxes();
            PrizeStandBoxConfig selectedBox = GetSelectedPrizeStandBox();

            if (prizeStandStatusLabel)
                prizeStandStatusLabel.text = connectionInfo.IsConnected
                    ? $"Подключена ({connectionInfo.ConnectedBoxesCount} ячеек)"
                    : "Не подключена";

            if (prizeStandBoxCountLabel)
                prizeStandBoxCountLabel.text = boxes.Count.ToString();

            if (prizeStandSelectedBoxLabel)
                prizeStandSelectedBoxLabel.text = selectedBox != null ? selectedBox.boxNumber.ToString() : "-";

            if (prizeStandThresholdLabel)
                prizeStandThresholdLabel.text = selectedBox != null ? selectedBox.requiredScore.ToString() : "-";

            if (detailsText)
                detailsText.text = BuildDetailsText(connectionInfo, boxes, selectedBox);
        }

        private string BuildDetailsText(PrizeStandConnectionInfo connectionInfo, List<PrizeStandBoxConfig> boxes, PrizeStandBoxConfig selectedBox)
        {
            return _config.type switch
            {
                PrizeType.QRCode => $"Ранг QR-приза: {GetTierName(_config.qrTier)}",
                PrizeType.Hopper => $"Капсул за выдачу: {_config.hopperCapsuleCount}",
                PrizeType.PrizeStand => BuildPrizeStandDetails(connectionInfo, boxes, selectedBox),
                _ => "Для уровня приз не назначен."
            };
        }

        private string BuildPrizeStandDetails(PrizeStandConnectionInfo connectionInfo, List<PrizeStandBoxConfig> boxes, PrizeStandBoxConfig selectedBox)
        {
            string connectionText = connectionInfo.IsConnected
                ? $"Витрина подключена, доступно на устройстве: {connectionInfo.ConnectedBoxesCount} ячеек."
                : "Витрина не подключена. Редактируется сохранённая конфигурация.";

            string selectedText = selectedBox != null
                ? $"Выбрана ячейка {selectedBox.boxNumber}, порог: {selectedBox.requiredScore} очков."
                : "Ячейки не настроены.";

            return $"{connectionText}\nСконфигурировано ячеек: {boxes.Count}\n{selectedText}";
        }

        private void RefreshRowHighlights()
        {
            if (_activeRow == ROW_CLOSE)
            {
                if (rowPointer) rowPointer.Hide();

                if (closeModalButton && EventSystem.current)
                    EventSystem.current.SetSelectedGameObject(closeModalButton.gameObject);
            }
            else
            {
                if (rowPointer)
                {
                    RectTransform target = GetActiveRowTransform();
                    if (target) rowPointer.SetTarget(target);
                }
            }
        }

        private RectTransform GetActiveRowTransform()
        {
            return _activeRow switch
            {
                ROW_TYPE => prizeTypeRow,
                ROW_QR_TIER => qrTierRow != null ? qrTierRow : prizeTypeRow,
                ROW_HOPPER_PARAM => hopperParamRow != null ? hopperParamRow : prizeTypeRow,
                ROW_STAND_BOX_COUNT => prizeStandBoxCountRow != null ? prizeStandBoxCountRow : prizeTypeRow,
                ROW_STAND_SELECTED_BOX => prizeStandSelectedBoxRow != null ? prizeStandSelectedBoxRow : prizeTypeRow,
                ROW_STAND_THRESHOLD => prizeStandThresholdRow != null ? prizeStandThresholdRow : prizeTypeRow,
                _ => prizeTypeRow
            };
        }

        private void AutoResolveRows()
        {
            if (prizeTypeRow == null && prizeTypeLabel != null)
                prizeTypeRow = prizeTypeLabel.transform.parent as RectTransform;

            if (qrTierRow == null && qrTierLabel != null)
                qrTierRow = qrTierLabel.transform.parent as RectTransform;

            if (hopperParamRow == null && hopperCapsuleCountLabel != null)
                hopperParamRow = hopperCapsuleCountLabel.transform.parent as RectTransform;

            if (prizeStandBoxCountRow == null && prizeStandBoxCountLabel != null)
                prizeStandBoxCountRow = prizeStandBoxCountLabel.transform.parent as RectTransform;

            if (prizeStandSelectedBoxRow == null && prizeStandSelectedBoxLabel != null)
                prizeStandSelectedBoxRow = prizeStandSelectedBoxLabel.transform.parent as RectTransform;

            if (prizeStandThresholdRow == null && prizeStandThresholdLabel != null)
                prizeStandThresholdRow = prizeStandThresholdLabel.transform.parent as RectTransform;
        }

        private void EnsurePrizeStandSettingsInitialized()
        {
            _prizeStandSettings ??= CreateDefaultPrizeStandSettings();
            _prizeStandSettings.boxes ??= new List<PrizeStandBoxConfig>();

            if (_prizeStandSettings.boxes.Count == 0)
            {
                int initialCount = defaultPrizeStandBoxesCount;
                PrizeStandConnectionInfo connectionInfo = PrizeSystemManager.Instance != null
                    ? PrizeSystemManager.Instance.GetPrizeStandConnectionInfo()
                    : new PrizeStandConnectionInfo(false, 0);
                if (connectionInfo.IsConnected && connectionInfo.ConnectedBoxesCount > 0)
                    initialCount = Mathf.Clamp(connectionInfo.ConnectedBoxesCount, 1, maxBoxes);

                for (int i = 1; i <= initialCount; i++)
                    _prizeStandSettings.boxes.Add(new PrizeStandBoxConfig { boxNumber = i, requiredScore = 0 });
            }

            NormalizePrizeStandBoxes();
        }

        private void NormalizePrizeStandBoxes()
        {
            List<PrizeStandBoxConfig> boxes = _prizeStandSettings.boxes;
            boxes.Sort((a, b) => a.boxNumber.CompareTo(b.boxNumber));

            for (int i = 0; i < boxes.Count; i++)
            {
                if (boxes[i] == null)
                    boxes[i] = new PrizeStandBoxConfig();

                boxes[i].boxNumber = i + 1;
                boxes[i].requiredScore = Mathf.Max(0, boxes[i].requiredScore);
            }
        }

        private List<PrizeStandBoxConfig> GetPrizeStandBoxes()
        {
            EnsurePrizeStandSettingsInitialized();
            return _prizeStandSettings.boxes;
        }

        private PrizeStandBoxConfig GetSelectedPrizeStandBox()
        {
            List<PrizeStandBoxConfig> boxes = GetPrizeStandBoxes();
            if (boxes.Count == 0)
                return null;

            _selectedPrizeStandBoxIndex = Mathf.Clamp(_selectedPrizeStandBoxIndex, 0, boxes.Count - 1);
            return boxes[_selectedPrizeStandBoxIndex];
        }

        private static string GetPrizeTypeName(PrizeType type)
        {
            return type switch
            {
                PrizeType.None => "Нет приза",
                PrizeType.QRCode => "QR-код",
                PrizeType.Hopper => "Хоппер",
                PrizeType.PrizeStand => "Витрина",
                _ => type.ToString()
            };
        }

        private static string GetTierName(QRTier tier)
        {
            return tier switch
            {
                QRTier.Bronze => "Бронзовый",
                QRTier.Silver => "Серебряный",
                QRTier.Gold => "Золотой",
                _ => "Не задан"
            };
        }

        private static int GetTierIndex(QRTier tier)
        {
            int index = Array.IndexOf(QRTiers, tier);
            return index >= 0 ? index : 0;
        }

        private static LevelPrizeConfig CopyConfig(LevelPrizeConfig src)
        {
            return new LevelPrizeConfig
            {
                type = src.type,
                qrTier = src.qrTier,
                hopperCapsuleCount = src.hopperCapsuleCount,
                hopperDelayBetweenCapsules = src.hopperDelayBetweenCapsules
            };
        }

        private static PrizeStandSettings CopyPrizeStandSettings(PrizeStandSettings src)
        {
            PrizeStandSettings copy = new PrizeStandSettings();
            if (src?.boxes == null)
                return copy;

            for (int i = 0; i < src.boxes.Count; i++)
            {
                PrizeStandBoxConfig box = src.boxes[i];
                if (box == null)
                    continue;

                copy.boxes.Add(new PrizeStandBoxConfig
                {
                    boxNumber = box.boxNumber,
                    requiredScore = box.requiredScore
                });
            }

            return copy;
        }

        private PrizeStandSettings CreateDefaultPrizeStandSettings()
        {
            PrizeStandSettings settings = new PrizeStandSettings();
            for (int i = 1; i <= defaultPrizeStandBoxesCount; i++)
            {
                settings.boxes.Add(new PrizeStandBoxConfig
                {
                    boxNumber = i,
                    requiredScore = 0
                });
            }

            return settings;
        }
    }
}