using MongoDB.Driver;

namespace Core.Blueprint.Mongo
{
    /// <summary>
    /// Provides the MongoDB provider and database connection using the specified configuration settings.
    /// This class manages the connection to MongoDB and ensures that the correct credentials are used for authentication.
    /// </summary>
    public class MongoProvider
    {
        private readonly IMongoDatabase _database;

        /// <summary>
        /// Initializes a new instance of the <see cref="MongoProvider"/> class.
        /// This constructor sets up the MongoDB provider using the connection string, audience, and other settings provided.
        /// It also configures authentication using OpenID Connect (OIDC) credentials.
        /// </summary>
        /// <param name="mongoDbSettings">The MongoDB settings required for connecting to the database.</param>
        public MongoProvider(IMongoDatabase database)
        {
            _database = database ?? throw new ArgumentNullException(nameof(database));
        }

        /// <summary>
        /// Gets the initialized MongoDB database. If the database is not initialized, an exception is thrown.
        /// </summary>
        /// <exception cref="InvalidOperationException">Thrown when the database connection is not initialized.</exception>
        protected IMongoDatabase Database
        {
            get
            {
                if (_database == null)
                {
                    throw new InvalidOperationException("MongoDB connection is not initialized.");
                }
                return _database;
            }
        }
    }
}