/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/* eslint-disable @typescript-eslint/no-explicit-any */
const mockFixLLMEditWithInstruction = vi.hoisted(() => vi.fn());
const mockGenerateJson = vi.hoisted(() => vi.fn());
const mockOpenDiff = vi.hoisted(() => vi.fn());
import { IdeClient } from '../ide/ide-client.js';
vi.mock('../ide/ide-client.js', () => ({
    IdeClient: {
        getInstance: vi.fn(),
    },
}));
vi.mock('../utils/llm-edit-fixer.js', () => ({
    FixLLMEditWithInstruction: mockFixLLMEditWithInstruction,
}));
vi.mock('../core/client.js', () => ({
    GeminiClient: vi.fn().mockImplementation(() => ({
        generateJson: mockGenerateJson,
        getHistory: vi.fn().mockResolvedValue([]),
    })),
}));
vi.mock('../utils/editor.js', () => ({
    openDiff: mockOpenDiff,
}));
import { describe, it, expect, beforeEach, afterEach, vi, } from 'vitest';
import { SmartEditTool, calculateReplacement, } from './smart-edit.js';
import { applyReplacement } from './edit.js';
import { ToolConfirmationOutcome } from './tools.js';
import { ToolErrorType } from './tool-error.js';
import path from 'node:path';
import fs from 'node:fs';
import os from 'node:os';
import { ApprovalMode } from '../config/config.js';
import {} from '@google/genai';
import { createMockWorkspaceContext } from '../test-utils/mockWorkspaceContext.js';
import { StandardFileSystemService } from '../services/fileSystemService.js';
describe('SmartEditTool', () => {
    let tool;
    let tempDir;
    let rootDir;
    let mockConfig;
    let geminiClient;
    let fileSystemService;
    let baseLlmClient;
    beforeEach(() => {
        vi.restoreAllMocks();
        tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'smart-edit-tool-test-'));
        rootDir = path.join(tempDir, 'root');
        fs.mkdirSync(rootDir);
        geminiClient = {
            generateJson: mockGenerateJson,
            getHistory: vi.fn().mockResolvedValue([]),
        };
        baseLlmClient = {
            generateJson: mockGenerateJson,
        };
        fileSystemService = new StandardFileSystemService();
        mockConfig = {
            getUsageStatisticsEnabled: vi.fn(() => true),
            getSessionId: vi.fn(() => 'mock-session-id'),
            getContentGeneratorConfig: vi.fn(() => ({ authType: 'mock' })),
            getUseSmartEdit: vi.fn(() => false),
            getUseModelRouter: vi.fn(() => false),
            getProxy: vi.fn(() => undefined),
            getGeminiClient: vi.fn().mockReturnValue(geminiClient),
            getBaseLlmClient: vi.fn().mockReturnValue(baseLlmClient),
            getTargetDir: () => rootDir,
            getApprovalMode: vi.fn(),
            setApprovalMode: vi.fn(),
            getWorkspaceContext: () => createMockWorkspaceContext(rootDir),
            getFileSystemService: () => fileSystemService,
            getIdeMode: () => false,
            getApiKey: () => 'test-api-key',
            getModel: () => 'test-model',
            getSandbox: () => false,
            getDebugMode: () => false,
            getQuestion: () => undefined,
            getToolDiscoveryCommand: () => undefined,
            getToolCallCommand: () => undefined,
            getMcpServerCommand: () => undefined,
            getMcpServers: () => undefined,
            getUserAgent: () => 'test-agent',
            getUserMemory: () => '',
            setUserMemory: vi.fn(),
            getGeminiMdFileCount: () => 0,
            setGeminiMdFileCount: vi.fn(),
            getToolRegistry: () => ({}),
        };
        mockConfig.getApprovalMode.mockClear();
        mockConfig.getApprovalMode.mockReturnValue(ApprovalMode.DEFAULT);
        mockFixLLMEditWithInstruction.mockReset();
        mockFixLLMEditWithInstruction.mockResolvedValue({
            noChangesRequired: false,
            search: '',
            replace: '',
            explanation: 'LLM fix failed',
        });
        mockGenerateJson.mockReset();
        mockGenerateJson.mockImplementation(async (contents, schema) => {
            const userContent = contents.find((c) => c.role === 'user');
            let promptText = '';
            if (userContent && userContent.parts) {
                promptText = userContent.parts
                    .filter((p) => typeof p.text === 'string')
                    .map((p) => p.text)
                    .join('\n');
            }
            const snippetMatch = promptText.match(/Problematic target snippet:\n```\n([\s\S]*?)\n```/);
            const problematicSnippet = snippetMatch && snippetMatch[1] ? snippetMatch[1] : '';
            if (schema.properties?.corrected_target_snippet) {
                return Promise.resolve({
                    corrected_target_snippet: problematicSnippet,
                });
            }
            if (schema.properties?.corrected_new_string) {
                const originalNewStringMatch = promptText.match(/original_new_string \(what was intended to replace original_old_string\):\n```\n([\s\S]*?)\n```/);
                const originalNewString = originalNewStringMatch && originalNewStringMatch[1]
                    ? originalNewStringMatch[1]
                    : '';
                return Promise.resolve({ corrected_new_string: originalNewString });
            }
            return Promise.resolve({});
        });
        tool = new SmartEditTool(mockConfig);
    });
    afterEach(() => {
        fs.rmSync(tempDir, { recursive: true, force: true });
    });
    describe('applyReplacement', () => {
        it('should return newString if isNewFile is true', () => {
            expect(applyReplacement(null, 'old', 'new', true)).toBe('new');
            expect(applyReplacement('existing', 'old', 'new', true)).toBe('new');
        });
        it('should replace oldString with newString in currentContent', () => {
            expect(applyReplacement('hello old world old', 'old', 'new', false)).toBe('hello new world new');
        });
        it('should treat $ literally and not as replacement pattern', () => {
            const current = 'regex end is $ and more';
            const oldStr = 'regex end is $';
            const newStr = 'regex end is $ and correct';
            const result = applyReplacement(current, oldStr, newStr, false);
            expect(result).toBe('regex end is $ and correct and more');
        });
        it("should treat $' literally and not as a replacement pattern", () => {
            const current = 'foo';
            const oldStr = 'foo';
            const newStr = "bar$'baz";
            const result = applyReplacement(current, oldStr, newStr, false);
            expect(result).toBe("bar$'baz");
        });
    });
    describe('calculateReplacement', () => {
        const abortSignal = new AbortController().signal;
        it('should perform an exact replacement', async () => {
            const content = 'hello world';
            const result = await calculateReplacement(mockConfig, {
                params: {
                    file_path: 'test.txt',
                    instruction: 'test',
                    old_string: 'world',
                    new_string: 'moon',
                },
                currentContent: content,
                abortSignal,
            });
            expect(result.newContent).toBe('hello moon');
            expect(result.occurrences).toBe(1);
        });
        it('should perform a flexible, whitespace-insensitive replacement', async () => {
            const content = '  hello\n    world\n';
            const result = await calculateReplacement(mockConfig, {
                params: {
                    file_path: 'test.txt',
                    instruction: 'test',
                    old_string: 'hello\nworld',
                    new_string: 'goodbye\nmoon',
                },
                currentContent: content,
                abortSignal,
            });
            expect(result.newContent).toBe('  goodbye\n  moon\n');
            expect(result.occurrences).toBe(1);
        });
        it('should return 0 occurrences if no match is found', async () => {
            const content = 'hello world';
            const result = await calculateReplacement(mockConfig, {
                params: {
                    file_path: 'test.txt',
                    instruction: 'test',
                    old_string: 'nomatch',
                    new_string: 'moon',
                },
                currentContent: content,
                abortSignal,
            });
            expect(result.newContent).toBe(content);
            expect(result.occurrences).toBe(0);
        });
        it('should perform a regex-based replacement for flexible intra-line whitespace', async () => {
            // This case would fail with the previous exact and line-trimming flexible logic
            // because the whitespace *within* the line is different.
            const content = '  function  myFunc( a, b ) {\n    return a + b;\n  }';
            const result = await calculateReplacement(mockConfig, {
                params: {
                    file_path: 'test.js',
                    instruction: 'test',
                    old_string: 'function myFunc(a, b) {', // Note the normalized whitespace
                    new_string: 'const yourFunc = (a, b) => {',
                },
                currentContent: content,
                abortSignal,
            });
            // The indentation from the original line should be preserved and applied to the new string.
            const expectedContent = '  const yourFunc = (a, b) => {\n    return a + b;\n  }';
            expect(result.newContent).toBe(expectedContent);
            expect(result.occurrences).toBe(1);
        });
    });
    describe('validateToolParams', () => {
        it('should return null for valid params', () => {
            const params = {
                file_path: path.join(rootDir, 'test.txt'),
                instruction: 'An instruction',
                old_string: 'old',
                new_string: 'new',
            };
            expect(tool.validateToolParams(params)).toBeNull();
        });
        it('should return an error if path is outside the workspace', () => {
            const params = {
                file_path: path.join(os.tmpdir(), 'outside.txt'),
                instruction: 'An instruction',
                old_string: 'old',
                new_string: 'new',
            };
            expect(tool.validateToolParams(params)).toMatch(/must be within one of the workspace directories/);
        });
    });
    describe('execute', () => {
        const testFile = 'execute_me.txt';
        let filePath;
        beforeEach(() => {
            filePath = path.join(rootDir, testFile);
        });
        it('should reject when calculateEdit fails after an abort signal', async () => {
            const params = {
                file_path: path.join(rootDir, 'abort-execute.txt'),
                instruction: 'Abort during execute',
                old_string: 'old',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const abortController = new AbortController();
            const abortError = new Error('Abort requested during smart edit execution');
            const calculateSpy = vi
                .spyOn(invocation, 'calculateEdit')
                .mockImplementation(async () => {
                if (!abortController.signal.aborted) {
                    abortController.abort();
                }
                throw abortError;
            });
            await expect(invocation.execute(abortController.signal)).rejects.toBe(abortError);
            calculateSpy.mockRestore();
        });
        it('should edit an existing file and return diff with fileName', async () => {
            const initialContent = 'This is some old text.';
            const newContent = 'This is some new text.';
            fs.writeFileSync(filePath, initialContent, 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Replace old with new',
                old_string: 'old',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.llmContent).toMatch(/Successfully modified file/);
            expect(fs.readFileSync(filePath, 'utf8')).toBe(newContent);
            const display = result.returnDisplay;
            expect(display.fileDiff).toMatch(initialContent);
            expect(display.fileDiff).toMatch(newContent);
            expect(display.fileName).toBe(testFile);
        });
        it('should return error if old_string is not found in file', async () => {
            fs.writeFileSync(filePath, 'Some content.', 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Replace non-existent text',
                old_string: 'nonexistent',
                new_string: 'replacement',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.llmContent).toMatch(/0 occurrences found for old_string/);
            expect(result.returnDisplay).toMatch(/Failed to edit, could not find the string to replace./);
            expect(mockFixLLMEditWithInstruction).toHaveBeenCalled();
        });
        it('should succeed if FixLLMEditWithInstruction corrects the params', async () => {
            const initialContent = 'This is some original text.';
            const finalContent = 'This is some brand new text.';
            fs.writeFileSync(filePath, initialContent, 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Replace original with brand new',
                old_string: 'wrong text', // This will fail first
                new_string: 'brand new text',
            };
            mockFixLLMEditWithInstruction.mockResolvedValueOnce({
                noChangesRequired: false,
                search: 'original text', // The corrected search string
                replace: 'brand new text',
                explanation: 'Corrected the search string to match the file content.',
            });
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error).toBeUndefined();
            expect(result.llmContent).toMatch(/Successfully modified file/);
            expect(fs.readFileSync(filePath, 'utf8')).toBe(finalContent);
            expect(mockFixLLMEditWithInstruction).toHaveBeenCalledTimes(1);
        });
        it('should preserve CRLF line endings when editing a file', async () => {
            const initialContent = 'line one\r\nline two\r\n';
            const newContent = 'line one\r\nline three\r\n';
            fs.writeFileSync(filePath, initialContent, 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Replace two with three',
                old_string: 'line two',
                new_string: 'line three',
            };
            const invocation = tool.build(params);
            await invocation.execute(new AbortController().signal);
            const finalContent = fs.readFileSync(filePath, 'utf8');
            expect(finalContent).toBe(newContent);
        });
        it('should create a new file with CRLF line endings if new_string has them', async () => {
            const newContentWithCRLF = 'new line one\r\nnew line two\r\n';
            const params = {
                file_path: filePath,
                instruction: 'Create a new file',
                old_string: '',
                new_string: newContentWithCRLF,
            };
            const invocation = tool.build(params);
            await invocation.execute(new AbortController().signal);
            const finalContent = fs.readFileSync(filePath, 'utf8');
            expect(finalContent).toBe(newContentWithCRLF);
        });
        it('should return NO_CHANGE if FixLLMEditWithInstruction determines no changes are needed', async () => {
            const initialContent = 'The price is $100.';
            fs.writeFileSync(filePath, initialContent, 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Ensure the price is $100',
                old_string: 'price is $50', // Incorrect old string
                new_string: 'price is $100',
            };
            mockFixLLMEditWithInstruction.mockResolvedValueOnce({
                noChangesRequired: true,
                search: '',
                replace: '',
                explanation: 'The price is already correctly set to $100.',
            });
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error?.type).toBe(ToolErrorType.EDIT_NO_CHANGE_LLM_JUDGEMENT);
            expect(result.llmContent).toMatch(/A secondary check by an LLM determined/);
            expect(fs.readFileSync(filePath, 'utf8')).toBe(initialContent); // File is unchanged
        });
    });
    describe('self-correction with content refresh to pull in external edits', () => {
        const testFile = 'test.txt';
        let filePath;
        beforeEach(() => {
            filePath = path.join(rootDir, testFile);
        });
        it('should use refreshed file content for self-correction if file was modified externally', async () => {
            const initialContent = 'This is the original content.';
            const externallyModifiedContent = 'This is the externally modified content.';
            fs.writeFileSync(filePath, initialContent, 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'Replace "externally modified content" with "externally modified string"',
                old_string: 'externally modified content', // This will fail the first attempt, triggering self-correction.
                new_string: 'externally modified string',
            };
            // Spy on `readTextFile` to simulate an external file change between reads.
            const readTextFileSpy = vi
                .spyOn(fileSystemService, 'readTextFile')
                .mockResolvedValueOnce(initialContent) // First call in `calculateEdit`
                .mockResolvedValueOnce(externallyModifiedContent); // Second call in `attemptSelfCorrection`
            const invocation = tool.build(params);
            await invocation.execute(new AbortController().signal);
            // Assert that the file was read twice (initial read, then re-read for hash comparison).
            expect(readTextFileSpy).toHaveBeenCalledTimes(2);
            // Assert that the self-correction LLM was called with the updated content and a specific message.
            expect(mockFixLLMEditWithInstruction).toHaveBeenCalledWith(expect.any(String), // instruction
            params.old_string, params.new_string, expect.stringContaining('However, the file has been modified by either the user or an external process'), // errorForLlmEditFixer
            externallyModifiedContent, // The new content for correction
            expect.any(Object), // baseLlmClient
            expect.any(Object));
        });
    });
    describe('Error Scenarios', () => {
        const testFile = 'error_test.txt';
        let filePath;
        beforeEach(() => {
            filePath = path.join(rootDir, testFile);
        });
        it('should return FILE_NOT_FOUND error', async () => {
            const params = {
                file_path: filePath,
                instruction: 'test',
                old_string: 'any',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error?.type).toBe(ToolErrorType.FILE_NOT_FOUND);
        });
        it('should return ATTEMPT_TO_CREATE_EXISTING_FILE error', async () => {
            fs.writeFileSync(filePath, 'existing content', 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'test',
                old_string: '',
                new_string: 'new content',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error?.type).toBe(ToolErrorType.ATTEMPT_TO_CREATE_EXISTING_FILE);
        });
        it('should return NO_OCCURRENCE_FOUND error', async () => {
            fs.writeFileSync(filePath, 'content', 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'test',
                old_string: 'not-found',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error?.type).toBe(ToolErrorType.EDIT_NO_OCCURRENCE_FOUND);
        });
        it('should return EXPECTED_OCCURRENCE_MISMATCH error', async () => {
            fs.writeFileSync(filePath, 'one one two', 'utf8');
            const params = {
                file_path: filePath,
                instruction: 'test',
                old_string: 'one',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const result = await invocation.execute(new AbortController().signal);
            expect(result.error?.type).toBe(ToolErrorType.EDIT_EXPECTED_OCCURRENCE_MISMATCH);
        });
    });
    describe('IDE mode', () => {
        const testFile = 'edit_me.txt';
        let filePath;
        let ideClient;
        beforeEach(() => {
            filePath = path.join(rootDir, testFile);
            ideClient = {
                openDiff: vi.fn(),
                isDiffingEnabled: vi.fn().mockReturnValue(true),
            };
            vi.mocked(IdeClient.getInstance).mockResolvedValue(ideClient);
            mockConfig.getIdeMode = () => true;
        });
        it('should call ideClient.openDiff and update params on confirmation', async () => {
            const initialContent = 'some old content here';
            const newContent = 'some new content here';
            const modifiedContent = 'some modified content here';
            fs.writeFileSync(filePath, initialContent);
            const params = {
                file_path: filePath,
                instruction: 'test',
                old_string: 'old',
                new_string: 'new',
            };
            ideClient.openDiff.mockResolvedValueOnce({
                status: 'accepted',
                content: modifiedContent,
            });
            const invocation = tool.build(params);
            const confirmation = await invocation.shouldConfirmExecute(new AbortController().signal);
            expect(ideClient.openDiff).toHaveBeenCalledWith(filePath, newContent);
            if (confirmation && 'onConfirm' in confirmation) {
                await confirmation.onConfirm(ToolConfirmationOutcome.ProceedOnce);
            }
            expect(params.old_string).toBe(initialContent);
            expect(params.new_string).toBe(modifiedContent);
        });
    });
    describe('shouldConfirmExecute', () => {
        it('should rethrow calculateEdit errors when the abort signal is triggered', async () => {
            const filePath = path.join(rootDir, 'abort-confirmation.txt');
            const params = {
                file_path: filePath,
                instruction: 'Abort during confirmation',
                old_string: 'old',
                new_string: 'new',
            };
            const invocation = tool.build(params);
            const abortController = new AbortController();
            const abortError = new Error('Abort requested during smart edit confirmation');
            const calculateSpy = vi
                .spyOn(invocation, 'calculateEdit')
                .mockImplementation(async () => {
                if (!abortController.signal.aborted) {
                    abortController.abort();
                }
                throw abortError;
            });
            await expect(invocation.shouldConfirmExecute(abortController.signal)).rejects.toBe(abortError);
            calculateSpy.mockRestore();
        });
    });
    describe('multiple file edits', () => {
        it('should perform multiple removals and report correct diff stats', async () => {
            const numFiles = 10;
            const files = [];
            const expectedLinesRemoved = [];
            const actualLinesRemoved = [];
            // 1. Create 10 files with 5-10 lines each
            for (let i = 0; i < numFiles; i++) {
                const fileName = `test-file-${i}.txt`;
                const filePath = path.join(rootDir, fileName);
                const numLines = Math.floor(Math.random() * 6) + 5; // 5 to 10 lines
                const lines = Array.from({ length: numLines }, (_, j) => `File ${i}, Line ${j + 1}`);
                const content = lines.join('\n') + '\n';
                // Determine which lines to remove (2 or 3 lines)
                const numLinesToRemove = Math.floor(Math.random() * 2) + 2; // 2 or 3
                expectedLinesRemoved.push(numLinesToRemove);
                const startLineToRemove = 1; // Start removing from the second line
                const linesToRemove = lines.slice(startLineToRemove, startLineToRemove + numLinesToRemove);
                const toRemove = linesToRemove.join('\n') + '\n';
                fs.writeFileSync(filePath, content, 'utf8');
                files.push({
                    path: filePath,
                    initialContent: content,
                    toRemove,
                });
            }
            // 2. Create and execute 10 tool calls for removal
            for (const file of files) {
                const params = {
                    file_path: file.path,
                    instruction: `Remove lines from the file`,
                    old_string: file.toRemove,
                    new_string: '', // Removing the content
                    ai_proposed_string: '',
                };
                const invocation = tool.build(params);
                const result = await invocation.execute(new AbortController().signal);
                if (result.returnDisplay &&
                    typeof result.returnDisplay === 'object' &&
                    'diffStat' in result.returnDisplay &&
                    result.returnDisplay.diffStat) {
                    actualLinesRemoved.push(result.returnDisplay.diffStat?.model_removed_lines);
                }
                else if (result.error) {
                    console.error(`Edit failed for ${file.path}:`, result.error);
                }
            }
            // 3. Assert that the content was removed from each file
            for (const file of files) {
                const finalContent = fs.readFileSync(file.path, 'utf8');
                const expectedContent = file.initialContent.replace(file.toRemove, '');
                expect(finalContent).toBe(expectedContent);
                expect(finalContent).not.toContain(file.toRemove);
            }
            // 4. Assert that the total number of removed lines matches the diffStat total
            const totalExpectedRemoved = expectedLinesRemoved.reduce((sum, current) => sum + current, 0);
            const totalActualRemoved = actualLinesRemoved.reduce((sum, current) => sum + current, 0);
            expect(totalActualRemoved).toBe(totalExpectedRemoved);
        });
    });
});
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