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 * OPC Foundation MIT License 1.00
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 * obtaining a copy of this software and associated documentation
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using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace Opc.Ua.Client.Roles
{
    /// <summary>
    /// Strongly-typed client over the OPC UA Part 18 §4 role-management
    /// methods on the server's <c>RoleSet</c> and <c>RoleType</c> objects.
    /// </summary>
    /// <remarks>
    /// All mutator operations require the calling session to hold the
    /// <c>SecurityAdmin</c> role and to use a <c>SignAndEncrypt</c> secure
    /// channel; otherwise the server returns
    /// <c>Bad_UserAccessDenied</c> / <c>Bad_SecurityModeInsufficient</c>
    /// which surfaces as a <see cref="ServiceResultException"/>.
    /// </remarks>
    public interface IRoleManagementClient
    {
        /// <summary>
        /// Browses the server's <c>RoleSet</c> and returns a snapshot of
        /// every role exposed by it.
        /// </summary>
        ValueTask<IReadOnlyList<RoleInfo>> ListRolesAsync(CancellationToken cancellationToken = default);

        /// <summary>
        /// Reads a single role by NodeId.
        /// </summary>
        ValueTask<RoleInfo> ReadRoleAsync(NodeId roleId, CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleSet.AddRole</c> per Part 18 §4.2.2 and returns the
        /// new role's NodeId.
        /// </summary>
        ValueTask<NodeId> AddRoleAsync(
            string roleName,
            string? namespaceUri = null,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleSet.RemoveRole</c> per Part 18 §4.2.3.
        /// </summary>
        ValueTask RemoveRoleAsync(NodeId roleId, CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.AddIdentity</c> per Part 18 §4.4.5.
        /// </summary>
        ValueTask AddIdentityAsync(
            NodeId roleId,
            IdentityMappingRuleType rule,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.RemoveIdentity</c> per Part 18 §4.4.6.
        /// </summary>
        ValueTask RemoveIdentityAsync(
            NodeId roleId,
            IdentityMappingRuleType rule,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.AddApplication</c> per Part 18 §4.4.7.
        /// </summary>
        ValueTask AddApplicationAsync(
            NodeId roleId,
            string applicationUri,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.RemoveApplication</c> per Part 18 §4.4.8.
        /// </summary>
        ValueTask RemoveApplicationAsync(
            NodeId roleId,
            string applicationUri,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.AddEndpoint</c> per Part 18 §4.4.9.
        /// </summary>
        ValueTask AddEndpointAsync(
            NodeId roleId,
            EndpointType endpoint,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Invokes <c>RoleType.RemoveEndpoint</c> per Part 18 §4.4.10.
        /// </summary>
        ValueTask RemoveEndpointAsync(
            NodeId roleId,
            EndpointType endpoint,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Writes the <c>ApplicationsExclude</c> property on a role.
        /// </summary>
        ValueTask SetApplicationsExcludeAsync(
            NodeId roleId,
            bool value,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Writes the <c>EndpointsExclude</c> property on a role.
        /// </summary>
        ValueTask SetEndpointsExcludeAsync(
            NodeId roleId,
            bool value,
            CancellationToken cancellationToken = default);

        /// <summary>
        /// Writes the <c>CustomConfiguration</c> property on a role.
        /// </summary>
        ValueTask SetCustomConfigurationAsync(
            NodeId roleId,
            bool value,
            CancellationToken cancellationToken = default);
    }
}