using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using RAG.Domain.Entities;

namespace RAG.Infrastructure.Persistence.Configurations;

public class DocumentConfiguration : IEntityTypeConfiguration<Document>
{
    public void Configure(EntityTypeBuilder<Document> builder)
    {
        builder.ToTable("documents");
        builder.HasKey(d => d.Id);
        builder.Property(d => d.Id).ValueGeneratedNever().HasComment("文档ID");

        builder.Property(d => d.KnowledgeBaseId).HasComment("所属知识库ID");
        builder.Property(d => d.Title).HasMaxLength(500).IsRequired().HasComment("文档标题");
        builder.Property(d => d.FileName).HasMaxLength(500).IsRequired().HasComment("原始文件名");
        builder.Property(d => d.FilePath).HasMaxLength(1000).IsRequired().HasComment("文件存储路径");
        builder.Property(d => d.FileSize).HasComment("文件大小（字节）");
        builder.Property(d => d.ContentType).HasMaxLength(100).IsRequired().HasComment("文件MIME类型");
        builder.Property(d => d.ChunkCount).HasComment("分块数量");
        builder.Property(d => d.Status).HasComment("文档状态：Pending=0, Processing=1, Completed=2, Failed=3");

        // IAuditable
        builder.Property(d => d.CreatedBy).HasMaxLength(100).HasComment("创建人");
        builder.Property(d => d.CreatedAt).HasComment("创建时间");
        builder.Property(d => d.UpdatedBy).HasMaxLength(100).HasComment("更新人");
        builder.Property(d => d.UpdatedAt).HasComment("更新时间");

        // ISoftDelete
        builder.Property(d => d.IsDeleted).HasDefaultValue(false).HasComment("是否已软删除");

        // IHasOperatorIP
        builder.Property(d => d.OperatorIP).HasMaxLength(50).HasComment("操作者IP地址");

        builder.HasMany(d => d.Chunks)
            .WithOne(c => c.Document)
            .HasForeignKey(c => c.DocumentId)
            .OnDelete(DeleteBehavior.Cascade);
    }
}