using System;
using System.Reactive;
using System.Reactive.Threading.Tasks;
using Octokit.Reactive.Internal;

namespace Octokit.Reactive
{
    public class ObservableOrganizationMembersClient : IObservableOrganizationMembersClient
    {
        readonly IOrganizationMembersClient _client;
        readonly IConnection _connection;

        /// <summary>
        /// Initializes a new Organization Members API client.
        /// </summary>
        /// <param name="client">An <see cref="IGitHubClient" /> used to make the requests</param>
        public ObservableOrganizationMembersClient(IGitHubClient client)
        {
            Ensure.ArgumentNotNull(client, nameof(client));

            _client = client.Organization.Member;
            _connection = client.Connection;
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAll(org, ApiOptions.None);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="options">Options for changing the API response</param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<User>(ApiUrls.Members(org), options);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="filter">The members filter, <see cref="OrganizationMembersFilter"/> </param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersFilter filter)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAll(org, filter, ApiOptions.None);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="filter">The members filter, <see cref="OrganizationMembersFilter"/> </param>
        /// <param name="options">Options for changing the API response</param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersFilter filter, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<User>(ApiUrls.Members(org, filter), options);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="role">The role filter to use when getting the users, <see cref="OrganizationMembersRole"/></param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersRole role)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAll(org, role, ApiOptions.None);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="role">The role filter to use when getting the users, <see cref="OrganizationMembersRole"/></param>
        /// <param name="options">Options for changing the API response</param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersRole role, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<User>(ApiUrls.Members(org, role), options);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="filter">The members filter, <see cref="OrganizationMembersFilter"/> </param>
        /// <param name="role">The role filter to use when getting the users, <see cref="OrganizationMembersRole"/></param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersFilter filter, OrganizationMembersRole role)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAll(org, filter, role, ApiOptions.None);
        }

        /// <summary>
        /// <para>
        /// List all users who are members of an organization. A member is a user that
        /// belongs to at least 1 team in the organization.
        /// </para>
        /// <para>
        /// If the authenticated user is also an owner of this organization then both
        /// concealed and public member will be returned.
        /// </para>
        /// <para>
        /// If the requester is not an owner of the organization the query will be redirected
        /// to the public members list.
        /// </para>
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#members-list">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="filter">The members filter, <see cref="OrganizationMembersFilter"/> </param>
        /// <param name="role">The role filter to use when getting the users, <see cref="OrganizationMembersRole"/></param>
        /// <param name="options">Options for changing the API response</param>
        /// <returns></returns>
        public IObservable<User> GetAll(string org, OrganizationMembersFilter filter, OrganizationMembersRole role, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<User>(ApiUrls.Members(org, filter, role), options);
        }

        /// <summary>
        /// List all users who have publicized their membership of the organization.
        /// </summary>
        /// <remarks>http://developer.github.com/v3/orgs/members/#public-members-list</remarks>
        /// <param name="org">The login for the organization</param>
        /// <returns></returns>
        public IObservable<User> GetAllPublic(string org)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAllPublic(org, ApiOptions.None);
        }

        /// <summary>
        /// List all users who have publicized their membership of the organization.
        /// </summary>
        /// <remarks>http://developer.github.com/v3/orgs/members/#public-members-list</remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="options">Options for changing the API response</param>
        /// <returns></returns>
        public IObservable<User> GetAllPublic(string org, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<User>(ApiUrls.PublicMembers(org), options);
        }

        /// <summary>
        /// Check if a user is, publicly or privately, a member of the organization.
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#check-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<bool> CheckMember(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.CheckMember(org, user).ToObservable();
        }

        /// <summary>
        /// Check is a user is publicly a member of the organization.
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#check-public-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<bool> CheckMemberPublic(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.CheckMemberPublic(org, user).ToObservable();
        }

        /// <summary>
        /// Removes a user from the organization, this will also remove them from all teams
        /// within the organization and they will no longer have any access to the organization's
        /// repositories.
        /// </summary>
        /// <remarks>
        /// See the <a href="http://developer.github.com/v3/orgs/members/#remove-a-member">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<Unit> Delete(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.Delete(org, user).ToObservable();
        }

        /// <summary>
        /// Make the authenticated user's organization membership public.
        /// </summary>
        /// <remarks>
        /// This method requires authentication.
        /// See the <a href="http://developer.github.com/v3/orgs/members/#publicize-a-users-membership">API documentation</a> 
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<bool> Publicize(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.Publicize(org, user).ToObservable();
        }

        /// <summary>
        /// Make the authenticated user's organization membership private.
        /// </summary>
        /// <remarks>
        /// This method requires authentication.
        /// See the <a href="http://developer.github.com/v3/orgs/members/#conceal-a-users-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<Unit> Conceal(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.Conceal(org, user).ToObservable();
        }

        /// <summary>
        /// Get a user's membership with an organization.
        /// </summary>
        /// <remarks>
        /// This method requires authentication.
        /// The authenticated user must be an organization member.
        /// See the <a href="https://developer.github.com/v3/orgs/members/#get-organization-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<OrganizationMembership> GetOrganizationMembership(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.GetOrganizationMembership(org, user).ToObservable();
        }

        /// <summary>
        /// Add a user to the organization or update the user's role withing the organization. 
        /// </summary>
        /// <remarks>
        /// This method requires authentication.
        /// The authenticated user must be an organization owner.
        /// See the <a href="https://developer.github.com/v3/orgs/members/#add-or-update-organization-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <param name="addOrUpdateRequest">An <see cref="OrganizationMembershipUpdate"/> instance describing the
        /// changes to make to the user's organization membership</param>
        /// <returns></returns>
        public IObservable<OrganizationMembership> AddOrUpdateOrganizationMembership(string org, string user, OrganizationMembershipUpdate addOrUpdateRequest)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));
            Ensure.ArgumentNotNull(addOrUpdateRequest, nameof(addOrUpdateRequest));

            return _client.AddOrUpdateOrganizationMembership(org, user, addOrUpdateRequest).ToObservable();
        }

        /// <summary>
        /// Remove a user's membership with an organization.
        /// </summary>
        /// <remarks>
        /// This method requires authentication.
        /// The authenticated user must be an organization owner.
        /// See the <a href="https://developer.github.com/v3/orgs/members/#remove-organization-membership">API documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="user">The login for the user</param>
        /// <returns></returns>
        public IObservable<Unit> RemoveOrganizationMembership(string org, string user)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNullOrEmptyString(user, nameof(user));

            return _client.RemoveOrganizationMembership(org, user).ToObservable();
        }

        /// <summary>
        /// List all pending invitations for the organization.
        /// </summary>
        /// <remarks>
        /// See the <a href="https://developer.github.com/v3/orgs/members/#list-pending-organization-invitations">API Documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <returns></returns>
        public IObservable<OrganizationMembershipInvitation> GetAllPendingInvitations(string org)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));

            return GetAllPendingInvitations(org, ApiOptions.None);
        }

        /// <summary>
        /// List all pending invitations for the organization.
        /// </summary>
        /// <remarks>
        /// See the <a href="https://developer.github.com/v3/orgs/members/#list-pending-organization-invitations">API Documentation</a>
        /// for more information.
        /// </remarks>
        /// <param name="org">The login for the organization</param>
        /// <param name="options">Options to change API behaviour</param>
        /// <returns></returns>
        public IObservable<OrganizationMembershipInvitation> GetAllPendingInvitations(string org, ApiOptions options)
        {
            Ensure.ArgumentNotNullOrEmptyString(org, nameof(org));
            Ensure.ArgumentNotNull(options, nameof(options));

            return _connection.GetAndFlattenAllPages<OrganizationMembershipInvitation>(ApiUrls.OrganizationPendingInvititations(org), null, AcceptHeaders.OrganizationMembershipPreview, options);
        }
    }
}