/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import * as fs from 'fs/promises';
import * as path from 'path';
import * as cache from './crawlCache.js';
import { FileSearch, AbortError, filter } from './fileSearch.js';
import { createTmpDir, cleanupTmpDir } from '@qwen-code/qwen-code-test-utils';
describe('FileSearch', () => {
    let tmpDir;
    afterEach(async () => {
        if (tmpDir) {
            await cleanupTmpDir(tmpDir);
        }
        vi.restoreAllMocks();
    });
    it('should use .geminiignore rules', async () => {
        tmpDir = await createTmpDir({
            '.geminiignore': 'dist/',
            dist: ['ignored.js'],
            src: ['not-ignored.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: true,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual(['src/', '.geminiignore', 'src/not-ignored.js']);
    });
    it('should combine .gitignore and .geminiignore rules', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': 'dist/',
            '.geminiignore': 'build/',
            dist: ['ignored-by-git.js'],
            build: ['ignored-by-gemini.js'],
            src: ['not-ignored.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: true,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual([
            'src/',
            '.geminiignore',
            '.gitignore',
            'src/not-ignored.js',
        ]);
    });
    it('should use ignoreDirs option', async () => {
        tmpDir = await createTmpDir({
            logs: ['some.log'],
            src: ['main.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: ['logs'],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual(['src/', 'src/main.js']);
    });
    it('should handle negated directories', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': ['build/**', '!build/public', '!build/public/**'].join('\n'),
            build: {
                'private.js': '',
                public: ['index.html'],
            },
            src: ['main.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual([
            'build/',
            'build/public/',
            'src/',
            '.gitignore',
            'build/public/index.html',
            'src/main.js',
        ]);
    });
    it('should filter results with a search pattern', async () => {
        tmpDir = await createTmpDir({
            src: {
                'main.js': '',
                'util.ts': '',
                'style.css': '',
            },
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('**/*.js');
        expect(results).toEqual(['src/main.js']);
    });
    it('should handle root-level file negation', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': ['*.mk', '!Foo.mk'].join('\n'),
            'bar.mk': '',
            'Foo.mk': '',
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual(['.gitignore', 'Foo.mk']);
    });
    it('should handle directory negation with glob', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': [
                'third_party/**',
                '!third_party/foo',
                '!third_party/foo/bar',
                '!third_party/foo/bar/baz_buffer',
            ].join('\n'),
            third_party: {
                foo: {
                    bar: {
                        baz_buffer: '',
                    },
                },
                ignore_this: '',
            },
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual([
            'third_party/',
            'third_party/foo/',
            'third_party/foo/bar/',
            '.gitignore',
            'third_party/foo/bar/baz_buffer',
        ]);
    });
    it('should correctly handle negated patterns in .gitignore', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': ['dist/**', '!dist/keep.js'].join('\n'),
            dist: ['ignore.js', 'keep.js'],
            src: ['main.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual([
            'dist/',
            'src/',
            '.gitignore',
            'dist/keep.js',
            'src/main.js',
        ]);
    });
    // New test cases start here
    it('should initialize correctly when ignore files are missing', async () => {
        tmpDir = await createTmpDir({
            src: ['file1.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: true,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        // Expect no errors to be thrown during initialization
        await expect(fileSearch.initialize()).resolves.toBeUndefined();
        const results = await fileSearch.search('');
        expect(results).toEqual(['src/', 'src/file1.js']);
    });
    it('should respect maxResults option in search', async () => {
        tmpDir = await createTmpDir({
            src: {
                'file1.js': '',
                'file2.js': '',
                'file3.js': '',
                'file4.js': '',
            },
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('**/*.js', { maxResults: 2 });
        expect(results).toEqual(['src/file1.js', 'src/file2.js']); // Assuming alphabetical sort
    });
    it('should return empty array when no matches are found', async () => {
        tmpDir = await createTmpDir({
            src: ['file1.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('nonexistent-file.xyz');
        expect(results).toEqual([]);
    });
    it('should throw AbortError when filter is aborted', async () => {
        const controller = new AbortController();
        const dummyPaths = Array.from({ length: 5000 }, (_, i) => `file${i}.js`); // Large array to ensure yielding
        const filterPromise = filter(dummyPaths, '*.js', controller.signal);
        // Abort after a short delay to ensure filter has started
        setTimeout(() => controller.abort(), 1);
        await expect(filterPromise).rejects.toThrow(AbortError);
    });
    describe('with in-memory cache', () => {
        beforeEach(() => {
            cache.clear();
        });
        afterEach(() => {
            vi.useRealTimers();
        });
        it('should throw an error if search is called before initialization', async () => {
            tmpDir = await createTmpDir({});
            const fileSearch = new FileSearch({
                projectRoot: tmpDir,
                useGitignore: false,
                useGeminiignore: false,
                ignoreDirs: [],
                cache: false,
                cacheTtl: 0,
            });
            await expect(fileSearch.search('')).rejects.toThrow('Engine not initialized. Call initialize() first.');
        });
        it('should hit the cache for subsequent searches', async () => {
            tmpDir = await createTmpDir({ 'file1.js': '' });
            const getOptions = () => ({
                projectRoot: tmpDir,
                useGitignore: false,
                useGeminiignore: false,
                ignoreDirs: [],
                cache: true,
                cacheTtl: 10,
            });
            const fs1 = new FileSearch(getOptions());
            const crawlSpy1 = vi.spyOn(fs1, 'performCrawl');
            await fs1.initialize();
            expect(crawlSpy1).toHaveBeenCalledTimes(1);
            // Second search should hit the cache because the options are identical
            const fs2 = new FileSearch(getOptions());
            const crawlSpy2 = vi.spyOn(fs2, 'performCrawl');
            await fs2.initialize();
            expect(crawlSpy2).not.toHaveBeenCalled();
        });
        it('should miss the cache when ignore rules change', async () => {
            tmpDir = await createTmpDir({
                '.gitignore': 'a.txt',
                'a.txt': '',
                'b.txt': '',
            });
            const options = {
                projectRoot: tmpDir,
                useGitignore: true,
                useGeminiignore: false,
                ignoreDirs: [],
                cache: true,
                cacheTtl: 10000,
            };
            // Initial search to populate the cache
            const fs1 = new FileSearch(options);
            const crawlSpy1 = vi.spyOn(fs1, 'performCrawl');
            await fs1.initialize();
            const results1 = await fs1.search('');
            expect(crawlSpy1).toHaveBeenCalledTimes(1);
            expect(results1).toEqual(['.gitignore', 'b.txt']);
            // Modify the ignore file
            await fs.writeFile(path.join(tmpDir, '.gitignore'), 'b.txt');
            // Second search should miss the cache and trigger a recrawl
            const fs2 = new FileSearch(options);
            const crawlSpy2 = vi.spyOn(fs2, 'performCrawl');
            await fs2.initialize();
            const results2 = await fs2.search('');
            expect(crawlSpy2).toHaveBeenCalledTimes(1);
            expect(results2).toEqual(['.gitignore', 'a.txt']);
        });
        it('should miss the cache after TTL expires', async () => {
            vi.useFakeTimers();
            tmpDir = await createTmpDir({ 'file1.js': '' });
            const options = {
                projectRoot: tmpDir,
                useGitignore: false,
                useGeminiignore: false,
                ignoreDirs: [],
                cache: true,
                cacheTtl: 10, // 10 seconds
            };
            // Initial search to populate the cache
            const fs1 = new FileSearch(options);
            await fs1.initialize();
            // Advance time past the TTL
            await vi.advanceTimersByTimeAsync(11000);
            // Second search should miss the cache and trigger a recrawl
            const fs2 = new FileSearch(options);
            const crawlSpy = vi.spyOn(fs2, 'performCrawl');
            await fs2.initialize();
            expect(crawlSpy).toHaveBeenCalledTimes(1);
        });
    });
    it('should handle empty or commented-only ignore files', async () => {
        tmpDir = await createTmpDir({
            '.gitignore': '# This is a comment\n\n   \n',
            src: ['main.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: true,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual(['src/', '.gitignore', 'src/main.js']);
    });
    it('should always ignore the .git directory', async () => {
        tmpDir = await createTmpDir({
            '.git': ['config', 'HEAD'],
            src: ['main.js'],
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false, // Explicitly disable .gitignore to isolate this rule
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const results = await fileSearch.search('');
        expect(results).toEqual(['src/', 'src/main.js']);
    });
    it('should be cancellable via AbortSignal', async () => {
        const largeDir = {};
        for (let i = 0; i < 100; i++) {
            largeDir[`file${i}.js`] = '';
        }
        tmpDir = await createTmpDir(largeDir);
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        const controller = new AbortController();
        const searchPromise = fileSearch.search('**/*.js', {
            signal: controller.signal,
        });
        // Yield to allow the search to start before aborting.
        await new Promise((resolve) => setImmediate(resolve));
        controller.abort();
        await expect(searchPromise).rejects.toThrow(AbortError);
    });
    it('should leverage ResultCache for bestBaseQuery optimization', async () => {
        tmpDir = await createTmpDir({
            src: {
                'foo.js': '',
                'bar.ts': '',
                nested: {
                    'baz.js': '',
                },
            },
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: true, // Enable caching for this test
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        // Perform a broad search to prime the cache
        const broadResults = await fileSearch.search('src/**');
        expect(broadResults).toEqual([
            'src/',
            'src/nested/',
            'src/bar.ts',
            'src/foo.js',
            'src/nested/baz.js',
        ]);
        // Perform a more specific search that should leverage the broad search's cached results
        const specificResults = await fileSearch.search('src/**/*.js');
        expect(specificResults).toEqual(['src/foo.js', 'src/nested/baz.js']);
        // Although we can't directly inspect ResultCache.hits/misses from here,
        // the correctness of specificResults after a broad search implicitly
        // verifies that the caching mechanism, including bestBaseQuery, is working.
    });
    it('should be case-insensitive by default', async () => {
        tmpDir = await createTmpDir({
            'File1.Js': '',
            'file2.js': '',
            'FILE3.JS': '',
            'other.txt': '',
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: false,
            cacheTtl: 0,
        });
        await fileSearch.initialize();
        // Search with a lowercase pattern
        let results = await fileSearch.search('file*.js');
        expect(results).toHaveLength(3);
        expect(results).toEqual(expect.arrayContaining(['File1.Js', 'file2.js', 'FILE3.JS']));
        // Search with an uppercase pattern
        results = await fileSearch.search('FILE*.JS');
        expect(results).toHaveLength(3);
        expect(results).toEqual(expect.arrayContaining(['File1.Js', 'file2.js', 'FILE3.JS']));
        // Search with a mixed-case pattern
        results = await fileSearch.search('FiLe*.Js');
        expect(results).toHaveLength(3);
        expect(results).toEqual(expect.arrayContaining(['File1.Js', 'file2.js', 'FILE3.JS']));
    });
    it('should respect maxResults even when the cache returns an exact match', async () => {
        tmpDir = await createTmpDir({
            'file1.js': '',
            'file2.js': '',
            'file3.js': '',
            'file4.js': '',
            'file5.js': '',
        });
        const fileSearch = new FileSearch({
            projectRoot: tmpDir,
            useGitignore: false,
            useGeminiignore: false,
            ignoreDirs: [],
            cache: true, // Ensure caching is enabled
            cacheTtl: 10000,
        });
        await fileSearch.initialize();
        // 1. Perform a broad search to populate the cache with an exact match.
        const initialResults = await fileSearch.search('*.js');
        expect(initialResults).toEqual([
            'file1.js',
            'file2.js',
            'file3.js',
            'file4.js',
            'file5.js',
        ]);
        // 2. Perform the same search again, but this time with a maxResults limit.
        const limitedResults = await fileSearch.search('*.js', { maxResults: 2 });
        // 3. Assert that the maxResults limit was respected, even with a cache hit.
        expect(limitedResults).toEqual(['file1.js', 'file2.js']);
    });
});
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