using System;

using PluralKit.Bot;
using PluralKit.Core;

using Xunit;

namespace PluralKit.Tests
{
    public class GroupAddRemoveResponseTests
    {
        private static Func<Groups.AddRemoveOperation, int, int, int, int, string>
            func = GroupMemberUtils.GenerateResponse;
        private static Groups.AddRemoveOperation addOp = Groups.AddRemoveOperation.Add;
        private static Groups.AddRemoveOperation removeOp = Groups.AddRemoveOperation.Remove;
        private static string success = Emojis.Success;
        private static string failure = Emojis.Error;

        public class AddOp
        {
            public class MemberGroup
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Member added to group.",
                        func(addOp, 1, 1, 1, 0)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Member not added to group (member already in group).",
                        func(addOp, 1, 1, 0, 1)
                    );
            }

            public class MemberGroups
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Member added to groups.",
                        func(addOp, 1, 2, 2, 0)
                    );

                [Fact]
                public void PartialSuccess1()
                    => Assert.Equal(
                      $"{success} Member added to 2 groups (member already in 1 group).",
                      func(addOp, 1, 3, 2, 1)
                    );

                [Fact]
                public void PartialSuccess2()
                    => Assert.Equal(
                      $"{success} Member added to 1 group (member already in 2 groups).",
                      func(addOp, 1, 3, 1, 2)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Member not added to groups (member already in groups).",
                        func(addOp, 1, 2, 0, 2)
                    );
            }

            public class MembersGroup
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Members added to group.",
                        func(addOp, 2, 1, 2, 0)
                    );

                [Fact]
                public void PartialSuccess1()
                    => Assert.Equal(
                      $"{success} 2 members added to group (1 member already in group).",
                      func(addOp, 3, 1, 2, 1)
                    );

                [Fact]
                public void PartialSuccess2()
                    => Assert.Equal(
                      $"{success} 1 member added to group (2 members already in group).",
                      func(addOp, 3, 1, 1, 2)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Members not added to group (members already in group).",
                        func(addOp, 2, 1, 0, 2)
                    );
            }

        }

        public class RemoveOp
        {
            public class MemberGroup
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Member removed from group.",
                        func(removeOp, 1, 1, 1, 0)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Member not removed from group (member already not in group).",
                        func(removeOp, 1, 1, 0, 1)
                    );
            }

            public class MemberGroups
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Member removed from groups.",
                        func(removeOp, 1, 3, 3, 0)
                    );

                [Fact]
                public void PartialSuccess1()
                    => Assert.Equal(
                        $"{success} Member removed from 1 group (member already not in 2 groups).",
                        func(removeOp, 1, 3, 1, 2)
                    );

                [Fact]
                public void PartialSuccess2()
                    => Assert.Equal(
                        $"{success} Member removed from 2 groups (member already not in 1 group).",
                        func(removeOp, 1, 3, 2, 1)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Member not removed from groups (member already not in groups).",
                        func(removeOp, 1, 3, 0, 3)
                    );
            }

            public class MembersGroup
            {
                [Fact]
                public void Success()
                    => Assert.Equal(
                        $"{success} Members removed from group.",
                        func(removeOp, 2, 1, 2, 0)
                    );

                [Fact]
                public void PartialSuccess1()
                    => Assert.Equal(
                        $"{success} 1 member removed from group (2 members already not in group).",
                        func(removeOp, 3, 1, 1, 2)
                    );

                [Fact]
                public void PartialSuccess2()
                    => Assert.Equal(
                        $"{success} 2 members removed from group (1 member already not in group).",
                        func(removeOp, 3, 1, 2, 1)
                    );

                [Fact]
                public void Failure()
                    => Assert.Equal(
                        $"{failure} Members not removed from group (members already not in group).",
                        func(removeOp, 2, 1, 0, 2)
                    );
            }

        }
    }
}