using Microsoft.EntityFrameworkCore;
using ZB.MOM.WW.OtOpcUa.Configuration;
using ZB.MOM.WW.OtOpcUa.Configuration.Entities;

namespace ZB.MOM.WW.OtOpcUa.Admin.Services;

/// <summary>
///     Cluster CRUD surface used by the Blazor pages. Writes go through stored procs in later
///     phases; Phase 1 reads via EF Core directly (DENY SELECT on <c>dbo</c> schema means this
///     service connects as a DB owner during dev — production swaps in a read-only view grant).
/// </summary>
public sealed class ClusterService(OtOpcUaConfigDbContext db)
{
    public Task<List<ServerCluster>> ListAsync(CancellationToken ct) =>
        db.ServerClusters.AsNoTracking().OrderBy(c => c.ClusterId).ToListAsync(ct);

    public Task<ServerCluster?> FindAsync(string clusterId, CancellationToken ct) =>
        db.ServerClusters.AsNoTracking().FirstOrDefaultAsync(c => c.ClusterId == clusterId, ct);

    public async Task<ServerCluster> CreateAsync(ServerCluster cluster, string createdBy, CancellationToken ct)
    {
        cluster.CreatedAt = DateTime.UtcNow;
        cluster.CreatedBy = createdBy;
        db.ServerClusters.Add(cluster);
        await db.SaveChangesAsync(ct);
        return cluster;
    }
}