// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using NUnit.Framework;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.UserInterface;
using osu.Framework.Testing;
using osu.Game.Graphics.Containers;
using osu.Game.Graphics.Sprites;
using osu.Game.Graphics.UserInterface;
using osu.Game.Graphics.UserInterfaceV2;
using osu.Game.Online.API;
using osu.Game.Online.API.Requests;
using osu.Game.Online.API.Requests.Responses;
using osu.Game.Overlays;
using osu.Game.Overlays.Comments;
using osu.Game.Overlays.Comments.Buttons;
using osuTK.Input;

namespace osu.Game.Tests.Visual.Online
{
    public partial class TestSceneCommentActions : OsuManualInputManagerTestScene
    {
        private Container<Drawable> content = null!;
        protected override Container<Drawable> Content => content;
        private DummyAPIAccess dummyAPI => (DummyAPIAccess)API;

        [Cached(typeof(IDialogOverlay))]
        private readonly DialogOverlay dialogOverlay = new DialogOverlay();

        [Cached]
        private readonly OverlayColourProvider colourProvider = new OverlayColourProvider(OverlayColourScheme.Purple);

        private CommentsContainer commentsContainer = null!;

        private readonly ManualResetEventSlim requestLock = new ManualResetEventSlim();

        [BackgroundDependencyLoader]
        private void load()
        {
            base.Content.AddRange(new Drawable[]
            {
                new PopoverContainer
                {
                    RelativeSizeAxes = Axes.Both,
                    Child = content = new OsuScrollContainer
                    {
                        RelativeSizeAxes = Axes.Both
                    }
                },
                dialogOverlay
            });
        }

        [SetUpSteps]
        public void SetUp()
        {
            Schedule(() =>
            {
                API.Login("test", "test");
                Child = commentsContainer = new CommentsContainer();
            });
        }

        [Test]
        public void TestNonOwnCommentCantBeDeleted()
        {
            addTestComments();

            AddUntilStep("First comment has button", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                var ourComment = comments.SingleOrDefault(x => x.Comment.Id == 1);
                return ourComment != null && ourComment.ChildrenOfType<OsuSpriteText>().Any(x => x.Text == "delete");
            });

            AddAssert("Second doesn't", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                var ourComment = comments.Single(x => x.Comment.Id == 2);
                return ourComment.ChildrenOfType<OsuSpriteText>().All(x => x.Text != "delete");
            });
        }

        [Test]
        public void TestDeletion()
        {
            DrawableComment? ourComment = null;

            addTestComments();
            AddUntilStep("Comment exists", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                ourComment = comments.SingleOrDefault(x => x.Comment.Id == 1);
                return ourComment != null;
            });
            AddStep("It has delete button", () =>
            {
                var btn = ourComment.ChildrenOfType<OsuSpriteText>().Single(x => x.Text == "delete");
                InputManager.MoveMouseTo(btn);
            });
            AddStep("Click delete button", () =>
            {
                InputManager.Click(MouseButton.Left);
            });
            AddStep("Setup request handling", () =>
            {
                requestLock.Reset();

                dummyAPI.HandleRequest = request =>
                {
                    if (!(request is CommentDeleteRequest req))
                        return false;

                    if (req.CommentId != 1)
                        return false;

                    CommentBundle cb = new CommentBundle
                    {
                        Comments = new List<Comment>
                        {
                            new Comment
                            {
                                Id = 2,
                                Message = "This is a comment by another user",
                                UserId = API.LocalUser.Value.Id + 1,
                                CreatedAt = DateTimeOffset.Now,
                                User = new APIUser
                                {
                                    Id = API.LocalUser.Value.Id + 1,
                                    Username = "Another user"
                                }
                            },
                        },
                        IncludedComments = new List<Comment>(),
                        PinnedComments = new List<Comment>(),
                    };

                    Task.Run(() =>
                    {
                        requestLock.Wait(10000);
                        req.TriggerSuccess(cb);
                    });

                    return true;
                };
            });
            AddStep("Confirm dialog", () => InputManager.Key(Key.Number1));

            AddAssert("Loading spinner shown", () => commentsContainer.ChildrenOfType<LoadingSpinner>().Any(d => d.IsPresent));

            AddStep("Complete request", () => requestLock.Set());

            AddUntilStep("Comment is deleted locally", () => this.ChildrenOfType<DrawableComment>().Single(x => x.Comment.Id == 1).WasDeleted);
        }

        [Test]
        public void TestDeletionFail()
        {
            DrawableComment? ourComment = null;
            bool delete = false;

            addTestComments();
            AddUntilStep("Comment exists", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                ourComment = comments.SingleOrDefault(x => x.Comment.Id == 1);
                return ourComment != null;
            });
            AddStep("It has delete button", () =>
            {
                var btn = ourComment.ChildrenOfType<OsuSpriteText>().Single(x => x.Text == "delete");
                InputManager.MoveMouseTo(btn);
            });
            AddStep("Click delete button", () =>
            {
                InputManager.Click(MouseButton.Left);
            });
            AddStep("Setup request handling", () =>
            {
                dummyAPI.HandleRequest = request =>
                {
                    if (request is not CommentDeleteRequest req)
                        return false;

                    req.TriggerFailure(new InvalidOperationException());
                    delete = true;
                    return false;
                };
            });
            AddStep("Confirm dialog", () => InputManager.Key(Key.Number1));
            AddUntilStep("Deletion requested", () => delete);
            AddUntilStep("Comment is available", () =>
            {
                return !this.ChildrenOfType<DrawableComment>().Single(x => x.Comment.Id == 1).WasDeleted;
            });
            AddAssert("Loading spinner hidden", () =>
            {
                return ourComment.ChildrenOfType<LoadingSpinner>().All(d => !d.IsPresent);
            });
            AddAssert("Actions available", () =>
            {
                return ourComment.ChildrenOfType<LinkFlowContainer>().Single(x => x.Name == @"Actions buttons").IsPresent;
            });
        }

        [Test]
        public void TestReport()
        {
            const string report_text = "I don't like this comment";
            DrawableComment? targetComment = null;
            CommentReportRequest? request = null;

            addTestComments();
            AddUntilStep("Comment exists", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                targetComment = comments.SingleOrDefault(x => x.Comment.Id == 2);
                return targetComment != null;
            });
            AddStep("Setup request handling", () =>
            {
                requestLock.Reset();

                dummyAPI.HandleRequest = r =>
                {
                    if (!(r is CommentReportRequest req))
                        return false;

                    Task.Run(() =>
                    {
                        request = req;
                        requestLock.Wait(10000);
                        req.TriggerSuccess();
                    });

                    return true;
                };
            });
            AddStep("Click the button", () =>
            {
                var btn = targetComment.ChildrenOfType<OsuSpriteText>().Single(x => x.Text == "report");
                InputManager.MoveMouseTo(btn);
                InputManager.Click(MouseButton.Left);
            });
            AddStep("Try to report", () =>
            {
                var btn = this.ChildrenOfType<ReportCommentPopover>().Single().ChildrenOfType<RoundedButton>().Single();
                InputManager.MoveMouseTo(btn);
                InputManager.Click(MouseButton.Left);
            });
            AddWaitStep("Wait", 3);
            AddAssert("Nothing happened", () => this.ChildrenOfType<ReportCommentPopover>().Any());
            AddStep("Set report data", () =>
            {
                var field = this.ChildrenOfType<ReportCommentPopover>().Single().ChildrenOfType<OsuTextBox>().First();
                field.Current.Value = report_text;
                var reason = this.ChildrenOfType<OsuEnumDropdown<CommentReportReason>>().Single();
                reason.Current.Value = CommentReportReason.Other;
            });
            AddStep("Try to report", () =>
            {
                var btn = this.ChildrenOfType<ReportCommentPopover>().Single().ChildrenOfType<RoundedButton>().Single();
                InputManager.MoveMouseTo(btn);
                InputManager.Click(MouseButton.Left);
            });
            AddWaitStep("Wait", 3);
            AddAssert("Overlay closed", () => !this.ChildrenOfType<ReportCommentPopover>().Any());
            AddAssert("Loading spinner shown", () => targetComment.ChildrenOfType<LoadingSpinner>().Any(d => d.IsPresent));
            AddStep("Complete request", () => requestLock.Set());
            AddUntilStep("Request sent", () => request != null);
            AddAssert("Request is correct", () => request != null && request.CommentID == 2 && request.Comment == report_text && request.Reason == CommentReportReason.Other);
        }

        [Test]
        public void TestReply()
        {
            addTestComments();
            DrawableComment? targetComment = null;
            AddUntilStep("Comment exists", () =>
            {
                var comments = this.ChildrenOfType<DrawableComment>();
                targetComment = comments.SingleOrDefault(x => x.Comment.Id == 2);
                return targetComment != null;
            });
            AddStep("Setup request handling", () =>
            {
                requestLock.Reset();

                dummyAPI.HandleRequest = r =>
                {
                    if (!(r is CommentPostRequest req))
                        return false;

                    if (req.ParentCommentId != 2)
                        throw new ArgumentException("Wrong parent ID in request!");

                    if (req.CommentableId != 123 || req.Commentable != CommentableType.Beatmapset)
                        throw new ArgumentException("Wrong commentable data in request!");

                    Task.Run(() =>
                    {
                        requestLock.Wait(10000);
                        req.TriggerSuccess(new CommentBundle
                        {
                            Comments = new List<Comment>
                            {
                                new Comment
                                {
                                    Id = 98,
                                    Message = req.Message,
                                    LegacyName = "FirstUser",
                                    CreatedAt = DateTimeOffset.Now,
                                    VotesCount = 98,
                                    ParentId = req.ParentCommentId,
                                }
                            }
                        });
                    });

                    return true;
                };
            });
            AddStep("Click reply button", () =>
            {
                var btn = targetComment.ChildrenOfType<LinkFlowContainer>().Skip(1).First();
                var texts = btn.ChildrenOfType<SpriteText>();
                InputManager.MoveMouseTo(texts.Skip(1).First());
                InputManager.Click(MouseButton.Left);
            });
            AddAssert("There is 0 replies", () =>
            {
                var replLabel = targetComment.ChildrenOfType<ShowRepliesButton>().First().ChildrenOfType<SpriteText>().First();
                return replLabel.Text.ToString().Contains('0') && targetComment!.Comment.RepliesCount == 0;
            });
            AddStep("Focus field", () =>
            {
                InputManager.MoveMouseTo(targetComment.ChildrenOfType<TextBox>().First());
                InputManager.Click(MouseButton.Left);
            });
            AddStep("Enter text", () =>
            {
                targetComment.ChildrenOfType<TextBox>().First().Current.Value = "random reply";
            });
            AddStep("Submit", () =>
            {
                InputManager.Key(Key.Enter);
            });
            AddStep("Complete request", () => requestLock.Set());
            AddUntilStep("There is 1 reply", () =>
            {
                var replLabel = targetComment.ChildrenOfType<ShowRepliesButton>().First().ChildrenOfType<SpriteText>().First();
                return replLabel.Text.ToString().Contains('1') && targetComment!.Comment.RepliesCount == 1;
            });
            AddUntilStep("Submitted comment shown", () =>
            {
                var r = targetComment.ChildrenOfType<DrawableComment>().Skip(1).FirstOrDefault();
                return r != null && r.Comment.Message == "random reply";
            });
        }

        private void addTestComments()
        {
            AddStep("set up response", () =>
            {
                CommentBundle cb = new CommentBundle
                {
                    Comments = new List<Comment>
                    {
                        new Comment
                        {
                            Id = 1,
                            Message = "This is our comment",
                            UserId = API.LocalUser.Value.Id,
                            CreatedAt = DateTimeOffset.Now,
                            User = API.LocalUser.Value,
                        },
                        new Comment
                        {
                            Id = 2,
                            Message = "This is a comment by another user",
                            UserId = API.LocalUser.Value.Id + 1,
                            CreatedAt = DateTimeOffset.Now,
                            User = new APIUser
                            {
                                Id = API.LocalUser.Value.Id + 1,
                                Username = "Another user"
                            }
                        },
                    },
                    IncludedComments = new List<Comment>(),
                    PinnedComments = new List<Comment>(),
                };
                setUpCommentsResponse(cb);
            });

            AddStep("show comments", () => commentsContainer.ShowComments(CommentableType.Beatmapset, 123));
        }

        private void setUpCommentsResponse(CommentBundle commentBundle)
        {
            dummyAPI.HandleRequest = request =>
            {
                if (!(request is GetCommentsRequest getCommentsRequest))
                    return false;

                getCommentsRequest.TriggerSuccess(commentBundle);
                return true;
            };
        }
    }
}