using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Models.Entities;

namespace Configurations
{
    public class AccountConfiguration : IEntityTypeConfiguration<Account>
    {
        public void Configure(EntityTypeBuilder<Account> builder)
        {
            builder.ToTable("accounts");

            builder.HasKey(a => a.AccountId);

            builder.Property(a => a.AccountId)
                .HasColumnName("account_id");

            builder.Property(a => a.Name)
                .HasColumnName("name")
                .IsRequired()
                .HasMaxLength(100);

            builder.Property(a => a.Username)
                .HasColumnName("username")
                .IsRequired()
                .HasMaxLength(50);

            builder.Property(a => a.Password)
                .HasColumnName("password")
                .IsRequired()
                .HasMaxLength(256);

            builder.Property(a => a.Email)
                .HasColumnName("email")
                .IsRequired()
                .HasMaxLength(254);

            builder.Property(a => a.DepartmentId)
                .HasColumnName("department_id")
                .IsRequired();

            builder.Property(a => a.RoleId)
                .HasColumnName("role_id")
                .IsRequired();

            builder.Property(a => a.Status)
                .HasColumnName("status")
                .HasConversion<string>()
                .IsRequired()
                .HasMaxLength(20);

            builder.Property(a => a.CreatedAt)
                .HasColumnName("created_at")
                .IsRequired();

            builder.Property(a => a.UpdatedAt)
                .HasColumnName("updated_at");

            builder.Property(a => a.ModifiedBy)
                .HasColumnName("modified_by");

            // 唯一索引
            builder.HasIndex(a => a.Username)
                .IsUnique()
                .HasDatabaseName("UX_accounts_username");

            builder.HasIndex(a => a.Email)
                .IsUnique()
                .HasDatabaseName("UX_accounts_email");

            // 關聯與刪除行為
            builder.HasOne(a => a.Department)
                .WithMany(d => d.Accounts)
                .HasForeignKey(a => a.DepartmentId)
                .OnDelete(DeleteBehavior.Restrict);

            builder.HasOne(a => a.Role)
                .WithMany(r => r.Accounts)
                .HasForeignKey(a => a.RoleId)
                .OnDelete(DeleteBehavior.Restrict);

            // 自參照外鍵：modified_by -> accounts.account_id (SET NULL)
            builder.HasOne<Account>()
                .WithMany()
                .HasForeignKey(a => a.ModifiedBy)
                .OnDelete(DeleteBehavior.SetNull);
        }
    }
}