/*
Copyright 2022 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import { EventStatus, IEventRelation } from "matrix-js-sdk/src/matrix";

import { IRoomState } from "../../../../../../src/components/structures/RoomView";
import { editMessage, sendMessage } from "../../../../../../src/components/views/rooms/wysiwyg_composer/utils/message";
import { createTestClient, getRoomContext, mkEvent, mkStubRoom } from "../../../../../test-utils";
import defaultDispatcher from "../../../../../../src/dispatcher/dispatcher";
import SettingsStore from "../../../../../../src/settings/SettingsStore";
import { SettingLevel } from "../../../../../../src/settings/SettingLevel";
import { RoomPermalinkCreator } from "../../../../../../src/utils/permalinks/Permalinks";
import EditorStateTransfer from "../../../../../../src/utils/EditorStateTransfer";
import * as ConfirmRedactDialog from "../../../../../../src/components/views/dialogs/ConfirmRedactDialog";
import * as SlashCommands from "../../../../../../src/SlashCommands";
import * as Commands from "../../../../../../src/editor/commands";
import * as Reply from "../../../../../../src/utils/Reply";
import { MatrixClientPeg } from "../../../../../../src/MatrixClientPeg";
import { Action } from "../../../../../../src/dispatcher/actions";

describe("message", () => {
    const permalinkCreator = {
        forEvent(eventId: string): string {
            return "$$permalink$$";
        },
    } as RoomPermalinkCreator;
    const message = "<i><b>hello</b> world</i>";
    const mockEvent = mkEvent({
        type: "m.room.message",
        room: "myfakeroom",
        user: "myfakeuser",
        content: {
            msgtype: "m.text",
            body: "Replying to this",
            format: "org.matrix.custom.html",
            formatted_body: "Replying to this",
        },
        event: true,
    });

    const mockClient = createTestClient();
    mockClient.setDisplayName = jest.fn().mockResolvedValue({});
    mockClient.setRoomName = jest.fn().mockResolvedValue({});

    const mockRoom = mkStubRoom("myfakeroom", "myfakeroom", mockClient) as any;
    mockRoom.findEventById = jest.fn((eventId) => {
        return eventId === mockEvent.getId() ? mockEvent : null;
    });

    const defaultRoomContext: IRoomState = getRoomContext(mockRoom, {});

    const spyDispatcher = jest.spyOn(defaultDispatcher, "dispatch");

    beforeEach(() => {
        jest.spyOn(MatrixClientPeg, "get").mockReturnValue(mockClient);
        jest.clearAllMocks();
    });

    afterAll(() => {
        jest.restoreAllMocks();
    });

    describe("sendMessage", () => {
        it("Should not send empty html message", async () => {
            // When
            await sendMessage("", true, { roomContext: defaultRoomContext, mxClient: mockClient, permalinkCreator });

            // Then
            expect(mockClient.sendMessage).toHaveBeenCalledTimes(0);
            expect(spyDispatcher).toHaveBeenCalledTimes(0);
        });

        it("Should not send message when there is no roomId", async () => {
            // When
            const mockRoomWithoutId = mkStubRoom("", "room without id", mockClient) as any;
            const mockRoomContextWithoutId: IRoomState = getRoomContext(mockRoomWithoutId, {});

            await sendMessage(message, true, {
                roomContext: mockRoomContextWithoutId,
                mxClient: mockClient,
                permalinkCreator,
            });

            // Then
            expect(mockClient.sendMessage).toHaveBeenCalledTimes(0);
            expect(spyDispatcher).toHaveBeenCalledTimes(0);
        });

        describe("calls client.sendMessage with", () => {
            it("a null argument if SendMessageParams is missing relation", async () => {
                // When
                await sendMessage(message, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                // Then
                expect(mockClient.sendMessage).toHaveBeenCalledWith(expect.anything(), null, expect.anything());
            });
            it("a null argument if SendMessageParams has relation but relation is missing event_id", async () => {
                // When
                await sendMessage(message, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                    relation: {},
                });

                // Then
                expect(mockClient.sendMessage).toHaveBeenCalledWith(expect.anything(), null, expect.anything());
            });
            it("a null argument if SendMessageParams has relation but rel_type does not match THREAD_RELATION_TYPE.name", async () => {
                // When
                await sendMessage(message, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                    relation: {
                        event_id: "valid_id",
                        rel_type: "m.does_not_match",
                    },
                });

                // Then
                expect(mockClient.sendMessage).toHaveBeenCalledWith(expect.anything(), null, expect.anything());
            });

            it("the event_id if SendMessageParams has relation and rel_type matches THREAD_RELATION_TYPE.name", async () => {
                // When
                await sendMessage(message, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                    relation: {
                        event_id: "valid_id",
                        rel_type: "m.thread",
                    },
                });

                // Then
                expect(mockClient.sendMessage).toHaveBeenCalledWith(expect.anything(), "valid_id", expect.anything());
            });
        });

        it("Should send html message", async () => {
            // When
            await sendMessage(message, true, {
                roomContext: defaultRoomContext,
                mxClient: mockClient,
                permalinkCreator,
            });

            // Then
            const expectedContent = {
                body: "*__hello__ world*",
                format: "org.matrix.custom.html",
                formatted_body: "<i><b>hello</b> world</i>",
                msgtype: "m.text",
            };
            expect(mockClient.sendMessage).toHaveBeenCalledWith("myfakeroom", null, expectedContent);
            expect(spyDispatcher).toHaveBeenCalledWith({ action: "message_sent" });
        });

        it("Should send reply to html message", async () => {
            const mockReplyEvent = mkEvent({
                type: "m.room.message",
                room: "myfakeroom",
                user: "myfakeuser2",
                content: { msgtype: "m.text", body: "My reply" },
                event: true,
            });

            // When
            await sendMessage(message, true, {
                roomContext: defaultRoomContext,
                mxClient: mockClient,
                permalinkCreator,
                replyToEvent: mockReplyEvent,
            });

            // Then
            expect(spyDispatcher).toHaveBeenCalledWith({
                action: "reply_to_event",
                event: null,
                context: defaultRoomContext.timelineRenderingType,
            });

            const expectedContent = {
                "body": "> <myfakeuser2> My reply\n\n*__hello__ world*",
                "format": "org.matrix.custom.html",
                "formatted_body":
                    '<mx-reply><blockquote><a href="$$permalink$$">In reply to</a>' +
                    ' <a href="https://matrix.to/#/myfakeuser2">myfakeuser2</a>' +
                    "<br>My reply</blockquote></mx-reply><i><b>hello</b> world</i>",
                "msgtype": "m.text",
                "m.relates_to": {
                    "m.in_reply_to": {
                        event_id: mockReplyEvent.getId(),
                    },
                },
            };
            expect(mockClient.sendMessage).toHaveBeenCalledWith("myfakeroom", null, expectedContent);
        });

        it("Should scroll to bottom after sending a html message", async () => {
            // When
            SettingsStore.setValue("scrollToBottomOnMessageSent", null, SettingLevel.DEVICE, true);
            await sendMessage(message, true, {
                roomContext: defaultRoomContext,
                mxClient: mockClient,
                permalinkCreator,
            });

            // Then
            expect(spyDispatcher).toHaveBeenCalledWith({
                action: "scroll_to_bottom",
                timelineRenderingType: defaultRoomContext.timelineRenderingType,
            });
        });

        it("Should handle emojis", async () => {
            // When
            await sendMessage("🎉", false, { roomContext: defaultRoomContext, mxClient: mockClient, permalinkCreator });

            // Then
            expect(spyDispatcher).toHaveBeenCalledWith({ action: "effects.confetti" });
        });

        describe("slash commands", () => {
            const getCommandSpy = jest.spyOn(SlashCommands, "getCommand");

            it("calls getCommand for a message starting with a valid command", async () => {
                // When
                const validCommand = "/spoiler";
                await sendMessage(validCommand, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                // Then
                expect(getCommandSpy).toHaveBeenCalledWith(validCommand);
            });

            it("does not call getCommand for valid command with invalid prefix", async () => {
                // When
                const invalidPrefixCommand = "//spoiler";
                await sendMessage(invalidPrefixCommand, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                // Then
                expect(getCommandSpy).toHaveBeenCalledTimes(0);
            });

            it("returns undefined when the command is not successful", async () => {
                // When
                const validCommand = "/spoiler";
                jest.spyOn(Commands, "runSlashCommand").mockResolvedValueOnce([{ content: "mock content" }, false]);

                const result = await sendMessage(validCommand, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                // Then
                expect(result).toBeUndefined();
            });

            // /spoiler is a .messages category command, /fireworks is an .effect category command
            const messagesAndEffectCategoryTestCases = ["/spoiler text", "/fireworks"];
            it.each(messagesAndEffectCategoryTestCases)(
                "does not add relations for a .messages or .effects category command if there is no relation to add",
                async (inputText) => {
                    await sendMessage(inputText, true, {
                        roomContext: defaultRoomContext,
                        mxClient: mockClient,
                        permalinkCreator,
                    });
                    expect(mockClient.sendMessage).toHaveBeenCalledWith(
                        "myfakeroom",
                        null,
                        expect.not.objectContaining({ "m.relates_to": expect.any }),
                    );
                },
            );

            it.each(messagesAndEffectCategoryTestCases)(
                "adds relations for a .messages or .effects category command if there is a relation",
                async (inputText) => {
                    const mockRelation: IEventRelation = {
                        rel_type: "mock relation type",
                    };
                    await sendMessage(inputText, true, {
                        roomContext: defaultRoomContext,
                        mxClient: mockClient,
                        permalinkCreator,
                        relation: mockRelation,
                    });

                    expect(mockClient.sendMessage).toHaveBeenCalledWith(
                        "myfakeroom",
                        null,
                        expect.objectContaining({ "m.relates_to": expect.objectContaining(mockRelation) }),
                    );
                },
            );

            it("calls addReplyToMessageContent when there is an event to reply to", async () => {
                const addReplySpy = jest.spyOn(Reply, "addReplyToMessageContent");
                await sendMessage("input", true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                    replyToEvent: mockEvent,
                });

                expect(addReplySpy).toHaveBeenCalledTimes(1);
            });

            // these test cases are .action and .admin categories
            const otherCategoryTestCases = ["/nick new_nickname", "/roomname new_room_name"];
            it.each(otherCategoryTestCases)(
                "returns undefined when the command category is not .messages or .effects",
                async (input) => {
                    const result = await sendMessage(input, true, {
                        roomContext: defaultRoomContext,
                        mxClient: mockClient,
                        permalinkCreator,
                        replyToEvent: mockEvent,
                    });

                    expect(result).toBeUndefined();
                },
            );

            it("if user enters invalid command and then sends it anyway", async () => {
                // mock out returning a true value for `shouldSendAnyway` to avoid rendering the modal
                jest.spyOn(Commands, "shouldSendAnyway").mockResolvedValueOnce(true);
                const invalidCommandInput = "/badCommand";

                await sendMessage(invalidCommandInput, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                // we expect the message to have been sent
                // and a composer focus action to have been dispatched
                expect(mockClient.sendMessage).toHaveBeenCalledWith(
                    "myfakeroom",
                    null,
                    expect.objectContaining({ body: invalidCommandInput }),
                );
                expect(spyDispatcher).toHaveBeenCalledWith(expect.objectContaining({ action: Action.FocusAComposer }));
            });

            it("if user enters invalid command and then does not send, return undefined", async () => {
                // mock out returning a false value for `shouldSendAnyway` to avoid rendering the modal
                jest.spyOn(Commands, "shouldSendAnyway").mockResolvedValueOnce(false);
                const invalidCommandInput = "/badCommand";

                const result = await sendMessage(invalidCommandInput, true, {
                    roomContext: defaultRoomContext,
                    mxClient: mockClient,
                    permalinkCreator,
                });

                expect(result).toBeUndefined();
            });
        });
    });

    describe("editMessage", () => {
        const editorStateTransfer = new EditorStateTransfer(mockEvent);

        it("Should cancel editing and ask for event removal when message is empty", async () => {
            // When
            const mockCreateRedactEventDialog = jest.spyOn(ConfirmRedactDialog, "createRedactEventDialog");

            const mockEvent = mkEvent({
                type: "m.room.message",
                room: "myfakeroom",
                user: "myfakeuser",
                content: { msgtype: "m.text", body: "Replying to this" },
                event: true,
            });
            const replacingEvent = mkEvent({
                type: "m.room.message",
                room: "myfakeroom",
                user: "myfakeuser",
                content: { msgtype: "m.text", body: "ReplacingEvent" },
                event: true,
            });
            replacingEvent.setStatus(EventStatus.QUEUED);
            mockEvent.makeReplaced(replacingEvent);
            const editorStateTransfer = new EditorStateTransfer(mockEvent);

            await editMessage("", { roomContext: defaultRoomContext, mxClient: mockClient, editorStateTransfer });

            // Then
            expect(mockClient.sendMessage).toHaveBeenCalledTimes(0);
            expect(mockClient.cancelPendingEvent).toHaveBeenCalledTimes(1);
            expect(mockCreateRedactEventDialog).toHaveBeenCalledTimes(1);
            expect(spyDispatcher).toHaveBeenCalledTimes(0);
        });

        it("Should do nothing if the content is unmodified", async () => {
            // When
            await editMessage(mockEvent.getContent().body, {
                roomContext: defaultRoomContext,
                mxClient: mockClient,
                editorStateTransfer,
            });

            // Then
            expect(mockClient.sendMessage).toHaveBeenCalledTimes(0);
        });

        it("Should send a message when the content is modified", async () => {
            // When
            const newMessage = `${mockEvent.getContent().body} new content`;
            await editMessage(newMessage, {
                roomContext: defaultRoomContext,
                mxClient: mockClient,
                editorStateTransfer,
            });

            // Then
            const { msgtype, format } = mockEvent.getContent();
            const expectedContent = {
                "body": ` * ${newMessage}`,
                "formatted_body": ` * ${newMessage}`,
                "m.new_content": {
                    body: "Replying to this new content",
                    format: "org.matrix.custom.html",
                    formatted_body: "Replying to this new content",
                    msgtype: "m.text",
                },
                "m.relates_to": {
                    event_id: mockEvent.getId(),
                    rel_type: "m.replace",
                },
                msgtype,
                format,
            };
            expect(mockClient.sendMessage).toHaveBeenCalledWith(mockEvent.getRoomId(), null, expectedContent);
            expect(spyDispatcher).toHaveBeenCalledWith({ action: "message_sent" });
        });
    });
});