using CvMatcher.Data.Entities;
using Microsoft.EntityFrameworkCore;

namespace CvMatcher.Data;

public sealed class CvMatcherDbContext : DbContext
{
    public const string SchemaName = MigrationConstants.SchemaName;
    public const string MigrationTableName = MigrationConstants.MigrationTableName;

    public CvMatcherDbContext(DbContextOptions<CvMatcherDbContext> options) : base(options)
    {
    }

    public DbSet<CvMatchResultEntity> CvMatchResults => Set<CvMatchResultEntity>();
    public DbSet<CvMatcherChatCacheEntity> CvMatcherChatCache => Set<CvMatcherChatCacheEntity>();
    public DbSet<AiPromptEntity> AiPrompts => Set<AiPromptEntity>();

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);
        // Configure migration history table to use schema-qualified name: [cvMatcher].[_Migrations]
        optionsBuilder.UseSqlServer(x => x.MigrationsHistoryTable(MigrationTableName, SchemaName));
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.HasDefaultSchema(SchemaName);

        modelBuilder.Entity<CvMatchResultEntity>(entity =>
        {
            entity.ToTable("Results");
            entity.HasKey(x => x.Id);
            entity.Property(x => x.Id).HasMaxLength(64);
            entity.Property(x => x.CvDocumentId).HasMaxLength(64).IsRequired();
            entity.Property(x => x.JobDocumentId).HasMaxLength(64).IsRequired();
            entity.Property(x => x.ResultJson).IsRequired();
            entity.Property(x => x.CreatedAt).HasDefaultValueSql("SYSUTCDATETIME()");
            entity.Property(x => x.Email).HasMaxLength(256);
            entity.Property(x => x.ClientIpAddress).HasMaxLength(45);
            entity.HasIndex(x => new { x.CvDocumentId, x.JobDocumentId, x.Language }).IsUnique();
        });

        modelBuilder.Entity<CvMatcherChatCacheEntity>(entity =>
        {
            entity.ToTable("ChatCache");
            entity.HasKey(x => x.CacheKey);
            entity.Property(x => x.CacheKey).HasMaxLength(64);
            entity.Property(x => x.Model).HasMaxLength(120).IsRequired();
            entity.Property(x => x.Temperature).HasColumnType("decimal(4,2)");
            entity.Property(x => x.ResponseText).IsRequired();
            entity.Property(x => x.CreatedAt).HasDefaultValueSql("SYSUTCDATETIME()");
        });

        modelBuilder.Entity<AiPromptEntity>(entity =>
        {
            entity.ToTable("AiPrompts");
            entity.HasKey(x => new { x.Key, x.Language });
            entity.Property(x => x.Key).HasMaxLength(128);
            entity.Property(x => x.Language).HasMaxLength(8);
            entity.Property(x => x.Value).IsRequired();
            entity.Property(x => x.Description).HasMaxLength(500).HasDefaultValue(string.Empty);
            entity.Property(x => x.UpdatedAt).HasDefaultValueSql("SYSUTCDATETIME()");
        });
    }
}
