using System.Globalization;

namespace Supermarket;

public sealed class NonFood : Product
{
    private readonly List<Review> _reviews;
    
    public NonFood(string productName, string barcode, int quantity)
        : base(productName, barcode, quantity)
    {
        _reviews = new List<Review>();
    }
    
    /// <summary>
    /// The list of reviews
    /// </summary>
    public Review[] Reviews => _reviews.ToArray();
    
    /// <summary>
    /// The average rating
    /// </summary>
    public double? AverageRating
    {
        get
        {
            if (_reviews.Count == 0)
            {
                return null;
            }

            return _reviews.Average(review => (double)review.Rating);
        }
    }
    
    protected override string[] CsvColumnNames => ["Barcode", "ProductName", "Quantity", "AverageRating"];
    
    protected override string[] CsvColumnValues => [
        Barcode,
        ProductName, 
        Quantity.ToString("F0", CultureInfo.InvariantCulture), 
        AverageRating?.ToString("F1", CultureInfo.InvariantCulture) ?? String.Empty
    ];
    
    /// <summary>
    /// Adds a review
    /// </summary>
    /// <param name="review">The review to add</param>
    public void AddReview(Review review)
    {
        _reviews.Add(review);
    }
}