using WyvernInventory.Core.Interfaces.Repos;
using WyvernInventory.Core.Models;

namespace WyvernInventory.Infrastructure.Repos;

public class GenericInventoryItemRepo : IDbObjectRepo<GenericInventoryItem>
{
    private List<GenericInventoryItem> _genericItemList = [];
    
    public async Task<List<GenericInventoryItem>> GetAsync(Predicate<GenericInventoryItem>? filter = null)
    {
        List<GenericInventoryItem> result = [];
        
        if (filter is null) return _genericItemList;

        result.AddRange(_genericItemList.Where(item => filter(item)));

        return result;
    }

    public async Task<(int created, int updated)> UpsertAsync(List<GenericInventoryItem> items)
    {
        int created = 0;
        int updated = 0;
        foreach (var item in items)
        {
            if (item.Id is not null && _genericItemList.Any(_ => _.Id == item.Id))
            {
                int index = _genericItemList.IndexOf(_genericItemList.Find(_ => _.Id == item.Id));
                _genericItemList[index] = item;

                updated++;
            }
            else
            {
                item.Id = _genericItemList.Count;
                _genericItemList.Add(item);
                
                created++;
            }
        }
        
        return (created, updated);
    }

    public async Task DeleteAsync(List<GenericInventoryItem> items)
    {
        foreach (var item in items)
        {
            _genericItemList.Remove(_genericItemList.Find(_ => _.Id == item.Id));
        }
    }
}