using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Prefab.Data.Entities;

namespace Prefab.Data.Configs
{
    /// <summary>
    /// Entity Framework Core configuration for the <see cref="AuditLogItem"/> entity.
    /// </summary>
    public class AuditLogItemConfig() : Prefab.Data.Configs.EntityConfig<AuditLogItem>(nameof(IPrefabDb.AuditLogItems))
    {
        /// <summary>
        /// Configures the properties and relationships for the <see cref="AuditLogItem"/> entity.
        /// </summary>
        /// <param name="builder">The builder to be used to configure the entity type.</param>
        public override void Configure(EntityTypeBuilder<AuditLogItem> builder)
        {
            builder.HasKey(e => e.Id);

            builder.Property(e => e.Property)
                .HasMaxLength(Rules.PropertyMaxLength)
                .IsRequired();

            builder.Property(e => e.OldValue)
                .HasMaxLength(Rules.ValueMaxLength);

            builder.Property(e => e.NewValue)
                .HasMaxLength(Rules.ValueMaxLength);

            builder.HasOne(e => e.AuditLog)
                .WithMany(a => a.Items)
                .HasForeignKey(e => e.AuditLogId)
                .OnDelete(DeleteBehavior.Cascade);
        }

        /// <summary>
        /// Validation rules and settings for <see cref="AuditLogItem"/> properties.
        /// </summary>
        public static class Rules
        {
            /// <summary>Maximum length for the property name.</summary>
            public const int PropertyMaxLength = 100;
            /// <summary>Maximum length for the value fields.</summary>
            public const int ValueMaxLength = 1000;
        }
    }
}