/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import { IEventRelation, MatrixEvent } from "matrix-js-sdk/src/matrix";
import { waitFor } from "@testing-library/react";

import { TimelineRenderingType } from "../../../../../../src/contexts/RoomContext";
import { mkStubRoom, stubClient } from "../../../../../test-utils";
import ContentMessages from "../../../../../../src/ContentMessages";
import { IRoomState } from "../../../../../../src/components/structures/RoomView";
import {
    handleClipboardEvent,
    isEventToHandleAsClipboardEvent,
} from "../../../../../../src/components/views/rooms/wysiwyg_composer/hooks/utils";

const mockClient = stubClient();
const mockRoom = mkStubRoom("mock room", "mock room", mockClient);
const mockRoomState = {
    room: mockRoom,
    timelineRenderingType: TimelineRenderingType.Room,
    replyToEvent: {} as unknown as MatrixEvent,
} as unknown as IRoomState;

const sendContentListToRoomSpy = jest.spyOn(ContentMessages.sharedInstance(), "sendContentListToRoom");
const sendContentToRoomSpy = jest.spyOn(ContentMessages.sharedInstance(), "sendContentToRoom");
const fetchSpy = jest.spyOn(window, "fetch");
const logSpy = jest.spyOn(console, "log").mockImplementation(() => {});

describe("handleClipboardEvent", () => {
    beforeEach(() => {
        jest.clearAllMocks();
    });

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

    function createMockClipboardEvent(props: any): ClipboardEvent {
        return { clipboardData: { files: [], types: [] }, ...props } as ClipboardEvent;
    }

    it("returns false if it is not a paste event", () => {
        const originalEvent = createMockClipboardEvent({ type: "copy" });
        const output = handleClipboardEvent(originalEvent, originalEvent.clipboardData, mockRoomState, mockClient);

        expect(output).toBe(false);
    });

    it("returns false if clipboard data is null", () => {
        const originalEvent = createMockClipboardEvent({ type: "paste", clipboardData: null });
        const output = handleClipboardEvent(originalEvent, originalEvent.clipboardData, mockRoomState, mockClient);

        expect(output).toBe(false);
    });

    it("returns false if room is undefined", () => {
        const originalEvent = createMockClipboardEvent({ type: "paste" });
        const { room, ...roomStateWithoutRoom } = mockRoomState;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            roomStateWithoutRoom,
            mockClient,
        );

        expect(output).toBe(false);
    });

    it("returns false if room clipboardData files and types are empty", () => {
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: { files: [], types: [] },
        });
        const output = handleClipboardEvent(originalEvent, originalEvent.clipboardData, mockRoomState, mockClient);
        expect(output).toBe(false);
    });

    it("handles event and calls sendContentListToRoom when data files are present", () => {
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: { files: ["something here"], types: [] },
        });
        const output = handleClipboardEvent(originalEvent, originalEvent.clipboardData, mockRoomState, mockClient);

        expect(sendContentListToRoomSpy).toHaveBeenCalledTimes(1);
        expect(sendContentListToRoomSpy).toHaveBeenCalledWith(
            originalEvent.clipboardData?.files,
            mockRoom.roomId,
            undefined, // this is the event relation, an optional arg
            mockClient,
            mockRoomState.timelineRenderingType,
        );
        expect(output).toBe(true);
    });

    it("calls sendContentListToRoom with eventRelation when present", () => {
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: { files: ["something here"], types: [] },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        expect(sendContentListToRoomSpy).toHaveBeenCalledTimes(1);
        expect(sendContentListToRoomSpy).toHaveBeenCalledWith(
            originalEvent.clipboardData?.files,
            mockRoom.roomId,
            mockEventRelation, // this is the event relation, an optional arg
            mockClient,
            mockRoomState.timelineRenderingType,
        );
        expect(output).toBe(true);
    });

    it("calls the error handler when sentContentListToRoom errors", async () => {
        const mockErrorMessage = "something went wrong";
        sendContentListToRoomSpy.mockRejectedValueOnce(new Error(mockErrorMessage));

        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: { files: ["something here"], types: [] },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        expect(sendContentListToRoomSpy).toHaveBeenCalledTimes(1);
        await waitFor(() => {
            expect(logSpy).toHaveBeenCalledWith(mockErrorMessage);
        });
        expect(output).toBe(true);
    });

    it("calls the error handler when data types has text/html but data can not be parsed", () => {
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: {
                files: [],
                types: ["text/html"],
                getData: jest.fn().mockReturnValue("<div>invalid html"),
            },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        expect(logSpy).toHaveBeenCalledWith("Failed to handle pasted content as Safari inserted content");
        expect(output).toBe(false);
    });

    it("calls fetch when data types has text/html and data can parsed", () => {
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: {
                files: [],
                types: ["text/html"],
                getData: jest.fn().mockReturnValue(`<img src="blob:" />`),
            },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        handleClipboardEvent(originalEvent, originalEvent.clipboardData, mockRoomState, mockClient, mockEventRelation);

        expect(fetchSpy).toHaveBeenCalledTimes(1);
        expect(fetchSpy).toHaveBeenCalledWith("blob:");
    });

    it("calls error handler when fetch fails", async () => {
        const mockErrorMessage = "fetch failed";
        fetchSpy.mockRejectedValueOnce(mockErrorMessage);
        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: {
                files: [],
                types: ["text/html"],
                getData: jest.fn().mockReturnValue(`<img src="blob:" />`),
            },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        await waitFor(() => {
            expect(logSpy).toHaveBeenCalledWith(mockErrorMessage);
        });
        expect(output).toBe(true);
    });

    it("calls sendContentToRoom when parsing is successful", async () => {
        fetchSpy.mockResolvedValueOnce({
            url: "test/file",
            blob: () => {
                return Promise.resolve({ type: "image/jpeg" } as Blob);
            },
        } as Response);

        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: {
                files: [],
                types: ["text/html"],
                getData: jest.fn().mockReturnValue(`<img src="blob:" />`),
            },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        await waitFor(() => {
            expect(sendContentToRoomSpy).toHaveBeenCalledWith(
                expect.any(File),
                mockRoom.roomId,
                mockEventRelation,
                mockClient,
                mockRoomState.replyToEvent,
            );
        });
        expect(output).toBe(true);
    });

    it("calls error handler when parsing is not successful", async () => {
        fetchSpy.mockResolvedValueOnce({
            url: "test/file",
            blob: () => {
                return Promise.resolve({ type: "image/jpeg" } as Blob);
            },
        } as Response);
        const mockErrorMessage = "sendContentToRoom failed";
        sendContentToRoomSpy.mockRejectedValueOnce(mockErrorMessage);

        const originalEvent = createMockClipboardEvent({
            type: "paste",
            clipboardData: {
                files: [],
                types: ["text/html"],
                getData: jest.fn().mockReturnValue(`<img src="blob:" />`),
            },
        });
        const mockEventRelation = {} as unknown as IEventRelation;
        const output = handleClipboardEvent(
            originalEvent,
            originalEvent.clipboardData,
            mockRoomState,
            mockClient,
            mockEventRelation,
        );

        await waitFor(() => {
            expect(logSpy).toHaveBeenCalledWith(mockErrorMessage);
        });
        expect(output).toBe(true);
    });
});

describe("isEventToHandleAsClipboardEvent", () => {
    it("returns true for ClipboardEvent", () => {
        const input = new ClipboardEvent("clipboard");
        expect(isEventToHandleAsClipboardEvent(input)).toBe(true);
    });

    it("returns true for special case input", () => {
        const input = new InputEvent("insertFromPaste", { inputType: "insertFromPaste" });
        Object.assign(input, { dataTransfer: "not null" });
        expect(isEventToHandleAsClipboardEvent(input)).toBe(true);
    });

    it("returns false for regular InputEvent", () => {
        const input = new InputEvent("input");
        expect(isEventToHandleAsClipboardEvent(input)).toBe(false);
    });

    it("returns false for other input", () => {
        const input = new KeyboardEvent("keyboard");
        expect(isEventToHandleAsClipboardEvent(input)).toBe(false);
    });
});