using Dapper;
using Npgsql;

namespace Kbx.Shared.Runtime;

public sealed class KbxNotificationRepository(NpgsqlDataSource dataSource)
{
    public async Task<IReadOnlyList<KbxUserNotificationDto>> GetRecentAsync(Guid tenantId, Guid userId, int limit, CancellationToken ct)
    {
        const string sql = """
        select id, severity, title, message, created_at as CreatedAt, read_at as ReadAt,
               screen_id as ScreenId, entity_type as EntityType, entity_id as EntityId,
               action::text as ActionJson
        from kbx.user_notifications
        where tenant_id=@tenantId and user_id=@userId
          and (expires_at is null or expires_at > now())
        order by created_at desc
        limit @limit;
        """;
        await using var connection = await dataSource.OpenConnectionAsync(ct);
        var rows = await connection.QueryAsync<KbxUserNotificationDto>(new CommandDefinition(sql, new { tenantId, userId, limit = Math.Clamp(limit, 1, 100) }, cancellationToken: ct));
        return rows.AsList();
    }

    public async Task MarkReadAsync(Guid tenantId, Guid userId, Guid id, CancellationToken ct)
    {
        const string sql = "update kbx.user_notifications set read_at=coalesce(read_at, now()) where tenant_id=@tenantId and user_id=@userId and id=@id";
        await using var connection = await dataSource.OpenConnectionAsync(ct);
        await connection.ExecuteAsync(new CommandDefinition(sql, new { tenantId, userId, id }, cancellationToken: ct));
    }
}