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

namespace Prefab.Data.Configs;

/// <summary>
/// Configuration class for the <see cref="GenericAttribute"/> entity within the dbo schema.
/// </summary>
public class GenericAttributeConfig() : EntityConfig<GenericAttribute>(nameof(IPrefabDb.GenericAttributes)) 
{
    /// <summary>
    /// Configuration of Entity Framework mapping for the <see cref="GenericAttribute"/> entity.
    /// </summary>
    public override void Configure(EntityTypeBuilder<GenericAttribute> builder)
    {
        builder
            .Ignore(x => x.Id);

        // Define the composite key (and clustered index) for the GenericAttribute entity.
        builder
            .HasKey(x => new { x.EntityId, x.KeyGroup, x.Key });

        builder.HasIndex(x => new { x.EntityId, x.KeyGroup })
            .HasDatabaseName("IX_GenericAttributes_Entity_Group");

        builder.HasIndex(x => x.DeletedOn)
            .HasFilter("[DeletedOn] IS NULL")
            .HasDatabaseName("IX_GenericAttributes_Active");
        
        builder
            .Property(x => x.KeyGroup)
            .HasMaxLength(Rules.KeyGroupMaxLength)
            .IsRequired();

        builder
            .Property(x => x.Key)
            .HasMaxLength(Rules.KeyMaxLength)
            .IsRequired();

        builder
            .Property(x => x.Value)
            .HasMaxLength(Rules.ValueMaxLength)
            .IsRequired();
    }
    
    /// <summary>
    /// Validation rules for the <see cref="GenericAttribute"/> entity.
    /// </summary>
    public static class Rules
    {
        /// <summary>
        /// Maximum length to set for the generic attribute key group.
        /// </summary>
        public const int KeyGroupMaxLength = 400;

        /// <summary>
        /// Minimum length to set for the generic attribute key.
        /// </summary>
        public const int KeyMinLength = 3;

        /// <summary>
        /// Maximum length to set for the generic attribute key.
        /// </summary>
        public const int KeyMaxLength = 400;

        /// <summary>
        /// Maximum length to set for the generic attribute value.
        /// </summary>
        public const int ValueMaxLength = int.MaxValue;
    }
}