// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

import {renderHook} from '@testing-library/react-hooks';

import {buildFilePreviewUrl, buildFileUrl} from '@actions/remote/file';
import {useServerUrl} from '@context/server';
import {mockFileInfo} from '@test/api_mocks/file';
import {isGif, isImage, isVideo} from '@utils/file';

import {useImageAttachments} from './files';

jest.mock('@actions/remote/file', () => ({
    buildFilePreviewUrl: jest.fn(),
    buildFileUrl: jest.fn(),
}));

jest.mock('@utils/file', () => ({
    isGif: jest.fn(),
    isImage: jest.fn(),
    isVideo: jest.fn(),
}));

jest.mock('@context/server', () => ({
    useServerUrl: jest.fn(),
}));

describe('useImageAttachments', () => {
    const serverUrl = 'https://example.com';

    beforeEach(() => {
        jest.mocked(useServerUrl).mockReturnValue(serverUrl);
    });

    it('should separate images and non-images correctly', () => {
        const filesInfo = [
            mockFileInfo({id: '1', localPath: 'path/to/image1', uri: `${serverUrl}/files/image1`}),
            mockFileInfo({id: '2', localPath: 'path/to/video1', uri: `${serverUrl}/files/video1`}),
            mockFileInfo({id: '3', localPath: 'path/to/file1', uri: `${serverUrl}/files/file1`}),
        ];

        jest.mocked(isImage).mockImplementation((file) => file?.id === '1');
        jest.mocked(isVideo).mockImplementation((file) => file?.id === '2');
        jest.mocked(isGif).mockReturnValue(false);
        jest.mocked(buildFilePreviewUrl).mockImplementation((url, id) => `${url}/preview/${id}`);
        jest.mocked(buildFileUrl).mockImplementation((url, id) => `${url}/file/${id}`);

        const {result} = renderHook(() => useImageAttachments(filesInfo));

        expect(result.current.images).toEqual([
            mockFileInfo({id: '1', localPath: 'path/to/image1', uri: 'path/to/image1'}),
            mockFileInfo({id: '2', localPath: 'path/to/video1', uri: 'path/to/video1'}),
        ]);

        expect(result.current.nonImages).toEqual([
            mockFileInfo({id: '3', localPath: 'path/to/file1', uri: `${serverUrl}/files/file1`}),
        ]);
    });

    it('should use preview URL for images without localPath', () => {
        const filesInfo = [
            mockFileInfo({id: '1', localPath: '', uri: `${serverUrl}/files/image1`}),
        ];

        jest.mocked(isImage).mockReturnValue(true);
        jest.mocked(isVideo).mockReturnValue(false);
        jest.mocked(isGif).mockReturnValue(false);
        jest.mocked(buildFilePreviewUrl).mockImplementation((url, id) => `${url}/preview/${id}`);

        const {result} = renderHook(() => useImageAttachments(filesInfo));

        expect(result.current.images).toEqual([
            mockFileInfo({id: '1', localPath: '', uri: 'https://example.com/preview/1'}),
        ]);
    });

    it('should use file URL for gifs and videos without local path', () => {
        const filesInfo = [
            mockFileInfo({id: '1', localPath: '', uri: `${serverUrl}/files/image1`}),
            mockFileInfo({id: '2', localPath: '', uri: `${serverUrl}/files/video1`}),
        ];

        jest.mocked(isImage).mockImplementation((file) => file?.id === '1' || file?.id === '3');
        jest.mocked(isVideo).mockImplementation((file) => file?.id === '2');
        jest.mocked(isGif).mockImplementation((file) => file?.id === '1');
        jest.mocked(buildFileUrl).mockImplementation((url, id) => `${url}/file/${id}`);

        const {result} = renderHook(() => useImageAttachments(filesInfo));

        expect(result.current.images).toEqual([
            mockFileInfo({id: '1', localPath: '', uri: 'https://example.com/file/1'}),
            mockFileInfo({id: '2', localPath: '', uri: 'https://example.com/file/2'}),
        ]);
    });

    it('should return the same values if the same arguments are passed', () => {
        const filesInfo = [
            mockFileInfo({id: '1', localPath: 'path/to/image1', uri: `${serverUrl}/files/image1`}),
            mockFileInfo({id: '2', localPath: 'path/to/video1', uri: `${serverUrl}/files/video1`}),
        ];

        jest.mocked(isImage).mockImplementation((file) => file?.id === '1');
        jest.mocked(isVideo).mockImplementation((file) => file?.id === '2');
        jest.mocked(isGif).mockReturnValue(false);
        jest.mocked(buildFilePreviewUrl).mockImplementation((url, id) => `${url}/preview/${id}`);
        jest.mocked(buildFileUrl).mockImplementation((url, id) => `${url}/file/${id}`);

        const {result, rerender} = renderHook(() => useImageAttachments(filesInfo));

        const firstResult = result.current;

        rerender();

        const secondResult = result.current;

        expect(firstResult).toBe(secondResult);
    });

    it('should handle empty filesInfo array', () => {
        const filesInfo: FileInfo[] = [];

        const {result} = renderHook(() => useImageAttachments(filesInfo));

        expect(result.current.images).toEqual([]);
        expect(result.current.nonImages).toEqual([]);
    });

    it('should handle files with no id', () => {
        const filesInfo = [
            mockFileInfo({id: '', localPath: 'path/to/image1', uri: `${serverUrl}/files/image1`}),
            mockFileInfo({id: '', localPath: '', uri: `${serverUrl}/files/image2`}),
        ];

        jest.mocked(isImage).mockReturnValue(true);
        jest.mocked(isVideo).mockReturnValue(false);
        jest.mocked(isGif).mockReturnValue(false);
        jest.mocked(buildFilePreviewUrl).mockImplementation((url, id) => `${url}/preview/${id}`);

        const {result} = renderHook(() => useImageAttachments(filesInfo));

        expect(result.current.images).toEqual([
            mockFileInfo({id: '', localPath: 'path/to/image1', uri: 'path/to/image1'}),
        ]);
    });
});