using CsvHelper;
using System.Globalization;
using PetCompanion.Models;
using PetCompanion.Repositories;

namespace PetCompanion.Services
{
    public class GameItemService
    {
        private readonly GameItemsRepository gameItemsRepository;

        public GameItemService(GameItemsRepository gameItemsRepository)
        {
            this.gameItemsRepository = gameItemsRepository;
        }

        public void LoadItemsFromCsv(string filePath)
        {
            using var reader = new StreamReader(filePath);
            using var csv = new CsvReader(reader, CultureInfo.InvariantCulture);

            var items = csv.GetRecords<GameItem>().ToList();

            foreach (var item in items)
            {
                var existingItem = gameItemsRepository.GetById(item.Id);
                if (existingItem == null)
                {
                    gameItemsRepository.Add(item);
                }
                else
                {
                    //gameItemsRepository.Update(item);
                }
            }
        }

        public GameItem GetRandomItem()
        {
            var items = gameItemsRepository.GetAll();
            var random = new Random();
            var index = random.Next(items.Count());
            return items.ElementAt(index);
        }

        public void ApplyItemEffect(Pet pet, GameItem item)
        {
            var effects = item.Effect.Split(';');
            foreach (var effect in effects)
            {
                ApplySingleEffect(pet, effect.Trim());
            }
        }

        public void RemoveItemEffect(Pet pet, GameItem item)
        {
            var effects = item.Effect.Split(';');
            foreach (var effect in effects)
            {
                RemoveSingleEffect(pet, effect.Trim());
            }
        }

        private void ApplySingleEffect(Pet pet, string effect)
        {
            if (effect == "Nothing") return;

            var parts = effect.Split('_');
            var action = parts[0];
            var target = parts[1];
            var value = parts.Length > 2 ? int.Parse(parts[2]) : 0;

            switch ($"{action}_{target}")
            {
                case "ADD_FOOD":
                    pet.Resources.Food += value;
                    break;
                case "ADD_INTELLIGENCE":
                    pet.IncrementIntelligence(value);
                    break;
                case "REDUCE_COOLDOWN":
                    pet.BasicActionCooldown = pet.BasicActionCooldown.AddMinutes(-value);
                    break;
                case "ADD_HEALTH":
                    pet.Health = Math.Min(pet.Health + value, pet.MaxHealth);
                    break;
                case "ADD_CHARISMA":
                    pet.IncrementCharisma(value);
                    break;
                case "ADD_STRENGTH":
                    pet.IncrementStrength(value);
                    break;
                case "ADD_RANDOMSTAT":
                    var random = new Random();
                    var stat = random.Next(4);
                    switch (stat)
                    {
                        case 0: pet.IncrementStrength(value); break;
                        case 1: pet.IncrementIntelligence(value); break;
                        case 2: pet.IncrementCharisma(value); break;
                        case 3: pet.Health = Math.Min(pet.Health + value, pet.MaxHealth); break;
                    }
                    break;
                case "RESTORE_STATS":
                    pet.Health = pet.MaxHealth;
                    pet.Stats.Intelligence = pet.Stats.MaxIntelligence;
                    pet.Stats.Strength = pet.Stats.MaxStrength;
                    pet.Stats.Charisma = pet.Stats.MaxCharisma;
                    break;
                case "ADD_MAXHEALTH":
                    pet.MaxHealth += value;
                    break;
                case "ADD_MAXINTELLIGENCE":
                    pet.Stats.MaxIntelligence += value;
                    break;
                case "ADD_MAXSTRENGTH":
                    pet.Stats.MaxStrength += value;
                    break;
                case "ADD_MAXCHARISMA":
                    pet.Stats.MaxCharisma += value;
                    break;
                case "ADD_MAXALLSTATS":
                    pet.MaxHealth += value;
                    pet.Stats.MaxIntelligence += value;
                    pet.Stats.MaxStrength += value;
                    pet.Stats.MaxCharisma += value;
                    break;
            }
        }

        private void RemoveSingleEffect(Pet pet, string effect)
        {
            if (effect == "Nothing") return;

            var parts = effect.Split('_');
            var action = parts[0];
            var target = parts[1];
            var value = parts.Length > 2 ? int.Parse(parts[2]) : 0;

            switch ($"{action}_{target}")
            {
                case "ADD_MAXHEALTH":
                    pet.MaxHealth -= value;
                    pet.Health = Math.Min(pet.Health, pet.MaxHealth);
                    break;
                case "ADD_MAXINTELLIGENCE":
                    pet.Stats.MaxIntelligence -= value;
                    pet.Stats.Intelligence = Math.Min(pet.Stats.Intelligence, pet.Stats.MaxIntelligence);
                    break;
                case "ADD_MAXSTRENGTH":
                    pet.Stats.MaxStrength -= value;
                    pet.Stats.Strength = Math.Min(pet.Stats.Strength, pet.Stats.MaxStrength);
                    break;
                case "ADD_MAXCHARISMA":
                    pet.Stats.MaxCharisma -= value;
                    pet.Stats.Charisma = Math.Min(pet.Stats.Charisma, pet.Stats.MaxCharisma);
                    break;
                case "ADD_MAXALLSTATS":
                    pet.MaxHealth -= value;
                    pet.Stats.MaxIntelligence -= value;
                    pet.Stats.MaxStrength -= value;
                    pet.Stats.MaxCharisma -= value;
                    pet.Health = Math.Min(pet.Health, pet.MaxHealth);
                    pet.Stats.Intelligence = Math.Min(pet.Stats.Intelligence, pet.Stats.MaxIntelligence);
                    pet.Stats.Strength = Math.Min(pet.Stats.Strength, pet.Stats.MaxStrength);
                    pet.Stats.Charisma = Math.Min(pet.Stats.Charisma, pet.Stats.MaxCharisma);
                    break;
            }
        }
    }
}