namespace MoneyMap.Models
{
    /// <summary>
    /// Represents a mapping rule that associates transaction name patterns with categories.
    /// Used for automatic categorization of transactions during import.
    /// </summary>
    public class CategoryMapping
    {
        public int Id { get; set; }

        /// <summary>
        /// The category to assign when a transaction matches the pattern.
        /// </summary>
        public required string Category { get; set; }

        /// <summary>
        /// The pattern to match against transaction names (case-insensitive contains).
        /// </summary>
        public required string Pattern { get; set; }

        /// <summary>
        /// Higher priority mappings are checked first. Default is 0.
        /// </summary>
        public int Priority { get; set; } = 0;

        /// <summary>
        /// Optional merchant to auto-assign when this pattern matches.
        /// </summary>
        public int? MerchantId { get; set; }
        public Merchant? Merchant { get; set; }

        /// <summary>
        /// AI confidence score when this rule was created by AI (0.0 - 1.0).
        /// </summary>
        public decimal? Confidence { get; set; }

        /// <summary>
        /// Who created this rule: "User" or "AI".
        /// </summary>
        public string? CreatedBy { get; set; }

        /// <summary>
        /// When this rule was created.
        /// </summary>
        public DateTime? CreatedAt { get; set; }
    }
}