using EventSubscriber.Application;
using Microsoft.EntityFrameworkCore;

namespace Projection.ReadModel;

/// <summary>EF Core implementation of the projection store over <see cref="ProjectionDbContext"/>.</summary>
public sealed class EfProjectionStore(ProjectionDbContext db) : IProjectionStore
{
    public async Task UpsertAsync(RegisterEntry entry, CancellationToken ct = default)
    {
        var row = await db.RegisterEntries.FindAsync([entry.Id], ct);
        if (row is null)
        {
            db.RegisterEntries.Add(new RegisterEntryRow
            {
                Id = entry.Id,
                Status = entry.Status,
                Bsn = entry.Bsn,
                NaamPlaceholder = entry.NaamPlaceholder,
            });
        }
        else
        {
            row.Status = entry.Status;
            row.Bsn = entry.Bsn;
            row.NaamPlaceholder = entry.NaamPlaceholder;
        }

        await db.SaveChangesAsync(ct);
    }

    public async Task ClearAsync(CancellationToken ct = default)
        => await db.RegisterEntries.ExecuteDeleteAsync(ct);

    public async Task<IReadOnlyList<RegisterEntry>> AllAsync(CancellationToken ct = default)
        => await db.RegisterEntries
            .OrderBy(r => r.Id)
            .Select(r => new RegisterEntry(r.Id, r.Status, r.Bsn, r.NaamPlaceholder))
            .ToListAsync(ct);
}