geometry-tower-defense/Assets/GameMain/Scripts/UI/General/UseCase/RewardSelectFormUseCase.cs

using System;
using System.Collections.Generic;
using GeometryTD.Definition;
using UnityEngine;
using Random = UnityEngine.Random;

namespace GeometryTD.UI
{
    public class RewardSelectFormUseCase : IUIUseCase
    {
        private readonly List<RewardSelectItemRawData> _rewardPool = new List<RewardSelectItemRawData>();

        private RewardSelectFormRawData _currentModel;
        private Action<RewardSelectItemRawData> _onRewardSelected;
        private Action _onGiveUp;

        private int _displayCount = 3;
        private int _refreshCost;
        private bool _allowRefreshOnce = true;
        private bool _allowGiveUp = true;
        private bool _hasRefreshed;
        private string _tipText = "Select one reward";

        public RewardSelectFormUseCase()
        {
            ConfigureRewardPool(BuildDefaultRewardPool());
        }

        public void ConfigureRewardPool(
            IReadOnlyList<RewardSelectItemRawData> rewardPool,
            int displayCount = 3,
            int refreshCost = 0,
            bool allowRefreshOnce = true,
            bool allowGiveUp = true,
            string tipText = null)
        {
            _rewardPool.Clear();
            if (rewardPool != null)
            {
                for (int i = 0; i < rewardPool.Count; i++)
                {
                    RewardSelectItemRawData item = rewardPool[i];
                    if (item == null)
                    {
                        continue;
                    }

                    _rewardPool.Add(CloneRawItem(item));
                }
            }

            _displayCount = Mathf.Max(1, displayCount);
            _refreshCost = Mathf.Max(0, refreshCost);
            _allowRefreshOnce = allowRefreshOnce;
            _allowGiveUp = allowGiveUp;
            _tipText = string.IsNullOrWhiteSpace(tipText) ? "Select one reward" : tipText;
            _hasRefreshed = false;
            _currentModel = null;
        }

        public void SetCallbacks(Action<RewardSelectItemRawData> onRewardSelected, Action onGiveUp = null)
        {
            _onRewardSelected = onRewardSelected;
            _onGiveUp = onGiveUp;
        }

        public RewardSelectFormRawData CreateInitialModel()
        {
            _hasRefreshed = false;
            _currentModel = BuildModel();
            return _currentModel;
        }

        public RewardSelectFormRawData TryRefresh()
        {
            if (_currentModel == null)
            {
                return null;
            }

            if (!CanRefreshInternal())
            {
                return _currentModel;
            }

            if (!TryConsumeRefreshCost())
            {
                _currentModel.CanRefresh = false;
                return _currentModel;
            }

            _hasRefreshed = true;
            _currentModel = BuildModel();
            return _currentModel;
        }

        public RewardSelectFormRawData SelectReward(int selectedIndex)
        {
            if (_currentModel?.RewardItems == null || _currentModel.RewardItems.Length <= 0)
            {
                return null;
            }

            if (selectedIndex < 0 || selectedIndex >= _currentModel.RewardItems.Length)
            {
                return _currentModel;
            }

            RewardSelectItemRawData selectedReward = _currentModel.RewardItems[selectedIndex];
            _onRewardSelected?.Invoke(selectedReward);

            _currentModel = null;
            return null;
        }

        public bool TryGiveUp()
        {
            if (!_allowGiveUp)
            {
                return false;
            }

            _onGiveUp?.Invoke();
            _currentModel = null;
            return true;
        }

        private RewardSelectFormRawData BuildModel()
        {
            RewardSelectItemRawData[] selectedRewards = SelectRewards();

            return new RewardSelectFormRawData
            {
                TipText = _tipText,
                RewardItems = selectedRewards,
                RefreshCost = _refreshCost,
                CanRefresh = selectedRewards.Length > 0 && CanRefreshInternal(),
                CanGiveUp = _allowGiveUp
            };
        }

        private RewardSelectItemRawData[] SelectRewards()
        {
            if (_rewardPool.Count <= 0)
            {
                return Array.Empty<RewardSelectItemRawData>();
            }

            int finalCount = Mathf.Clamp(_displayCount, 1, _rewardPool.Count);
            int[] indexes = new int[_rewardPool.Count];
            for (int i = 0; i < indexes.Length; i++)
            {
                indexes[i] = i;
            }

            for (int i = 0; i < finalCount; i++)
            {
                int randomIndex = Random.Range(i, indexes.Length);
                (indexes[i], indexes[randomIndex]) = (indexes[randomIndex], indexes[i]);
            }

            RewardSelectItemRawData[] results = new RewardSelectItemRawData[finalCount];
            for (int i = 0; i < finalCount; i++)
            {
                RewardSelectItemRawData source = _rewardPool[indexes[i]];
                results[i] = CloneRawItem(source);
            }

            return results;
        }

        private bool CanRefreshInternal()
        {
            if (!_allowRefreshOnce || _hasRefreshed)
            {
                return false;
            }

            return CanPayRefreshCost();
        }

        private bool CanPayRefreshCost()
        {
            if (_refreshCost <= 0)
            {
                return true;
            }

            if (GameEntry.PlayerInventory == null)
            {
                return true;
            }

            return GameEntry.PlayerInventory.Gold >= _refreshCost;
        }

        private bool TryConsumeRefreshCost()
        {
            if (_refreshCost <= 0)
            {
                return true;
            }

            if (GameEntry.PlayerInventory == null)
            {
                return true;
            }

            return GameEntry.PlayerInventory.TryConsumeGold(_refreshCost);
        }

        private static List<RewardSelectItemRawData> BuildDefaultRewardPool()
        {
            BackpackInventoryData inventory = RepoFormUseCase.SampleInventory();
            List<RewardSelectItemRawData> rewards = new List<RewardSelectItemRawData>();

            if (inventory?.MuzzleComponents != null)
            {
                for (int i = 0; i < inventory.MuzzleComponents.Count; i++)
                {
                    MuzzleCompItemData item = inventory.MuzzleComponents[i];
                    if (item == null)
                    {
                        continue;
                    }

                    rewards.Add(BuildRawItem(item));
                }
            }

            if (inventory?.BearingComponents != null)
            {
                for (int i = 0; i < inventory.BearingComponents.Count; i++)
                {
                    BearingCompItemData item = inventory.BearingComponents[i];
                    if (item == null)
                    {
                        continue;
                    }

                    rewards.Add(BuildRawItem(item));
                }
            }

            if (inventory?.BaseComponents != null)
            {
                for (int i = 0; i < inventory.BaseComponents.Count; i++)
                {
                    BaseCompItemData item = inventory.BaseComponents[i];
                    if (item == null)
                    {
                        continue;
                    }

                    rewards.Add(BuildRawItem(item));
                }
            }

            return rewards;
        }

        private static RewardSelectItemRawData BuildRawItem(TowerCompItemData item)
        {
            return new RewardSelectItemRawData
            {
                RewardId = item.InstanceId,
                SlotType = item.SlotType,
                Title = item.Name,
                TypeText = BuildTypeText(item.SlotType),
                Description = BuildDescription(item),
                Rarity = item.Rarity,
                Tags = item.Tags != null ? (TagType[])item.Tags.Clone() : Array.Empty<TagType>(),
                Icon = null,
                IsSelectable = true,
                SourceItem = item
            };
        }

        private static RewardSelectItemRawData CloneRawItem(RewardSelectItemRawData source)
        {
            if (source == null)
            {
                return null;
            }

            return new RewardSelectItemRawData
            {
                RewardId = source.RewardId,
                SlotType = source.SlotType,
                Title = source.Title,
                TypeText = source.TypeText,
                Description = source.Description,
                Rarity = source.Rarity,
                Tags = source.Tags != null ? (TagType[])source.Tags.Clone() : Array.Empty<TagType>(),
                Icon = source.Icon,
                IsSelectable = source.IsSelectable,
                SourceItem = source.SourceItem,
                UserData = source.UserData
            };
        }

        private static string BuildTypeText(TowerCompSlotType slotType)
        {
            return slotType switch
            {
                TowerCompSlotType.Muzzle => "Muzzle Component",
                TowerCompSlotType.Bearing => "Bearing Component",
                TowerCompSlotType.Base => "Base Component",
                TowerCompSlotType.Accessory => "Accessory",
                _ => "Component"
            };
        }

        private static string BuildDescription(TowerCompItemData item)
        {
            if (item is MuzzleCompItemData muzzle)
            {
                int damage = muzzle.AttackDamage != null && muzzle.AttackDamage.Length > 0 ? muzzle.AttackDamage[0] : 0;
                return $"Damage: {damage}, Spread: {muzzle.DamageRandomRate:P0}";
            }

            if (item is BearingCompItemData bearing)
            {
                float range = bearing.AttackRange != null && bearing.AttackRange.Length > 0 ? bearing.AttackRange[0] : 0f;
                float rotateSpeed = bearing.RotateSpeed != null && bearing.RotateSpeed.Length > 0 ? bearing.RotateSpeed[0] : 0f;
                return $"Range: {range:0.##}, Rotate Speed: {rotateSpeed:0.##}";
            }

            if (item is BaseCompItemData baseComp)
            {
                float attackSpeed = baseComp.AttackSpeed != null && baseComp.AttackSpeed.Length > 0 ? baseComp.AttackSpeed[0] : 0f;
                return $"Attack Speed: {attackSpeed:0.##}, Property: {baseComp.AttackPropertyType}";
            }

            return string.Empty;
        }
    }
}