/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { getCoreSystemPrompt, resolvePathFromEnv } from './prompts.js';
import { isGitRepository } from '../utils/gitUtils.js';
import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { CodebaseInvestigatorAgent } from '../agents/codebase-investigator.js';
import { GEMINI_DIR } from '../utils/paths.js';
// Mock tool names if they are dynamically generated or complex
vi.mock('../tools/ls', () => ({ LSTool: { Name: 'list_directory' } }));
vi.mock('../tools/edit', () => ({ EditTool: { Name: 'replace' } }));
vi.mock('../tools/glob', () => ({ GlobTool: { Name: 'glob' } }));
vi.mock('../tools/grep', () => ({ GrepTool: { Name: 'search_file_content' } }));
vi.mock('../tools/read-file', () => ({ ReadFileTool: { Name: 'read_file' } }));
vi.mock('../tools/read-many-files', () => ({
    ReadManyFilesTool: { Name: 'read_many_files' },
}));
vi.mock('../tools/shell', () => ({
    ShellTool: { Name: 'run_shell_command' },
}));
vi.mock('../tools/write-file', () => ({
    WriteFileTool: { Name: 'write_file' },
}));
vi.mock('../agents/codebase-investigator.js', () => ({
    CodebaseInvestigatorAgent: { name: 'codebase_investigator' },
}));
vi.mock('../utils/gitUtils', () => ({
    isGitRepository: vi.fn(),
}));
vi.mock('node:fs');
describe('Core System Prompt (prompts.ts)', () => {
    let mockConfig;
    beforeEach(() => {
        vi.resetAllMocks();
        vi.stubEnv('GEMINI_SYSTEM_MD', undefined);
        vi.stubEnv('GEMINI_WRITE_SYSTEM_MD', undefined);
        mockConfig = {
            getToolRegistry: vi.fn().mockReturnValue({
                getAllToolNames: vi.fn().mockReturnValue([]),
            }),
            getEnableShellOutputEfficiency: vi.fn().mockReturnValue(true),
            storage: {
                getProjectTempDir: vi.fn().mockReturnValue('/tmp/project-temp'),
            },
            isInteractive: vi.fn().mockReturnValue(true),
            isInteractiveShellEnabled: vi.fn().mockReturnValue(true),
        };
    });
    it.each([
        ['empty string', ''],
        ['whitespace only', '   \n  \t '],
    ])('should return the base prompt when userMemory is %s', (_, userMemory) => {
        vi.stubEnv('SANDBOX', undefined);
        const prompt = getCoreSystemPrompt(mockConfig, userMemory);
        expect(prompt).not.toContain('---\n\n'); // Separator should not be present
        expect(prompt).toContain('You are an interactive CLI agent'); // Check for core content
        expect(prompt).toMatchSnapshot(); // Use snapshot for base prompt structure
    });
    it('should append userMemory with separator when provided', () => {
        vi.stubEnv('SANDBOX', undefined);
        const memory = 'This is custom user memory.\nBe extra polite.';
        const expectedSuffix = `\n\n---\n\n${memory}`;
        const prompt = getCoreSystemPrompt(mockConfig, memory);
        expect(prompt.endsWith(expectedSuffix)).toBe(true);
        expect(prompt).toContain('You are an interactive CLI agent'); // Ensure base prompt follows
        expect(prompt).toMatchSnapshot(); // Snapshot the combined prompt
    });
    it.each([
        ['true', '# Sandbox', ['# macOS Seatbelt', '# Outside of Sandbox']],
        ['sandbox-exec', '# macOS Seatbelt', ['# Sandbox', '# Outside of Sandbox']],
        [undefined, '# Outside of Sandbox', ['# Sandbox', '# macOS Seatbelt']],
    ])('should include correct sandbox instructions for SANDBOX=%s', (sandboxValue, expectedContains, expectedNotContains) => {
        vi.stubEnv('SANDBOX', sandboxValue);
        const prompt = getCoreSystemPrompt(mockConfig);
        expect(prompt).toContain(expectedContains);
        expectedNotContains.forEach((text) => expect(prompt).not.toContain(text));
        expect(prompt).toMatchSnapshot();
    });
    it.each([
        [true, true],
        [false, false],
    ])('should handle git instructions when isGitRepository=%s', (isGitRepo, shouldContainGit) => {
        vi.stubEnv('SANDBOX', undefined);
        vi.mocked(isGitRepository).mockReturnValue(isGitRepo);
        const prompt = getCoreSystemPrompt(mockConfig);
        shouldContainGit
            ? expect(prompt).toContain('# Git Repository')
            : expect(prompt).not.toContain('# Git Repository');
        expect(prompt).toMatchSnapshot();
    });
    it('should return the interactive avoidance prompt when in non-interactive mode', () => {
        vi.stubEnv('SANDBOX', undefined);
        mockConfig.isInteractive = vi.fn().mockReturnValue(false);
        const prompt = getCoreSystemPrompt(mockConfig, '');
        expect(prompt).toContain('**Interactive Commands:**'); // Check for interactive prompt
        expect(prompt).toMatchSnapshot(); // Use snapshot for base prompt structure
    });
    it.each([
        [[CodebaseInvestigatorAgent.name], true],
        [[], false],
    ])('should handle CodebaseInvestigator with tools=%s', (toolNames, expectCodebaseInvestigator) => {
        const testConfig = {
            getToolRegistry: vi.fn().mockReturnValue({
                getAllToolNames: vi.fn().mockReturnValue(toolNames),
            }),
            getEnableShellOutputEfficiency: vi.fn().mockReturnValue(true),
            storage: {
                getProjectTempDir: vi.fn().mockReturnValue('/tmp/project-temp'),
            },
            isInteractive: vi.fn().mockReturnValue(false),
            isInteractiveShellEnabled: vi.fn().mockReturnValue(false),
        };
        const prompt = getCoreSystemPrompt(testConfig);
        if (expectCodebaseInvestigator) {
            expect(prompt).toContain(`your **first and primary tool** must be '${CodebaseInvestigatorAgent.name}'`);
            expect(prompt).toContain(`do not ignore the output of '${CodebaseInvestigatorAgent.name}'`);
            expect(prompt).not.toContain("Use 'search_file_content' and 'glob' search tools extensively");
        }
        else {
            expect(prompt).not.toContain(`your **first and primary tool** must be '${CodebaseInvestigatorAgent.name}'`);
            expect(prompt).toContain("Use 'search_file_content' and 'glob' search tools extensively");
        }
    });
    describe('GEMINI_SYSTEM_MD environment variable', () => {
        it.each(['false', '0'])('should use default prompt when GEMINI_SYSTEM_MD is "%s"', (value) => {
            vi.stubEnv('GEMINI_SYSTEM_MD', value);
            const prompt = getCoreSystemPrompt(mockConfig);
            expect(fs.readFileSync).not.toHaveBeenCalled();
            expect(prompt).not.toContain('custom system prompt');
        });
        it('should throw error if GEMINI_SYSTEM_MD points to a non-existent file', () => {
            const customPath = '/non/existent/path/system.md';
            vi.stubEnv('GEMINI_SYSTEM_MD', customPath);
            vi.mocked(fs.existsSync).mockReturnValue(false);
            expect(() => getCoreSystemPrompt(mockConfig)).toThrow(`missing system prompt file '${path.resolve(customPath)}'`);
        });
        it.each(['true', '1'])('should read from default path when GEMINI_SYSTEM_MD is "%s"', (value) => {
            const defaultPath = path.resolve(path.join(GEMINI_DIR, 'system.md'));
            vi.stubEnv('GEMINI_SYSTEM_MD', value);
            vi.mocked(fs.existsSync).mockReturnValue(true);
            vi.mocked(fs.readFileSync).mockReturnValue('custom system prompt');
            const prompt = getCoreSystemPrompt(mockConfig);
            expect(fs.readFileSync).toHaveBeenCalledWith(defaultPath, 'utf8');
            expect(prompt).toBe('custom system prompt');
        });
        it('should read from custom path when GEMINI_SYSTEM_MD provides one, preserving case', () => {
            const customPath = path.resolve('/custom/path/SyStEm.Md');
            vi.stubEnv('GEMINI_SYSTEM_MD', customPath);
            vi.mocked(fs.existsSync).mockReturnValue(true);
            vi.mocked(fs.readFileSync).mockReturnValue('custom system prompt');
            const prompt = getCoreSystemPrompt(mockConfig);
            expect(fs.readFileSync).toHaveBeenCalledWith(customPath, 'utf8');
            expect(prompt).toBe('custom system prompt');
        });
        it('should expand tilde in custom path when GEMINI_SYSTEM_MD is set', () => {
            const homeDir = '/Users/test';
            vi.spyOn(os, 'homedir').mockReturnValue(homeDir);
            const customPath = '~/custom/system.md';
            const expectedPath = path.join(homeDir, 'custom/system.md');
            vi.stubEnv('GEMINI_SYSTEM_MD', customPath);
            vi.mocked(fs.existsSync).mockReturnValue(true);
            vi.mocked(fs.readFileSync).mockReturnValue('custom system prompt');
            const prompt = getCoreSystemPrompt(mockConfig);
            expect(fs.readFileSync).toHaveBeenCalledWith(path.resolve(expectedPath), 'utf8');
            expect(prompt).toBe('custom system prompt');
        });
    });
    describe('GEMINI_WRITE_SYSTEM_MD environment variable', () => {
        it.each(['false', '0'])('should not write to file when GEMINI_WRITE_SYSTEM_MD is "%s"', (value) => {
            vi.stubEnv('GEMINI_WRITE_SYSTEM_MD', value);
            getCoreSystemPrompt(mockConfig);
            expect(fs.writeFileSync).not.toHaveBeenCalled();
        });
        it.each(['true', '1'])('should write to default path when GEMINI_WRITE_SYSTEM_MD is "%s"', (value) => {
            const defaultPath = path.resolve(path.join(GEMINI_DIR, 'system.md'));
            vi.stubEnv('GEMINI_WRITE_SYSTEM_MD', value);
            getCoreSystemPrompt(mockConfig);
            expect(fs.writeFileSync).toHaveBeenCalledWith(defaultPath, expect.any(String));
        });
        it('should write to custom path when GEMINI_WRITE_SYSTEM_MD provides one', () => {
            const customPath = path.resolve('/custom/path/system.md');
            vi.stubEnv('GEMINI_WRITE_SYSTEM_MD', customPath);
            getCoreSystemPrompt(mockConfig);
            expect(fs.writeFileSync).toHaveBeenCalledWith(customPath, expect.any(String));
        });
        it.each([
            ['~/custom/system.md', 'custom/system.md'],
            ['~', ''],
        ])('should expand tilde in custom path when GEMINI_WRITE_SYSTEM_MD is "%s"', (customPath, relativePath) => {
            const homeDir = '/Users/test';
            vi.spyOn(os, 'homedir').mockReturnValue(homeDir);
            const expectedPath = relativePath
                ? path.join(homeDir, relativePath)
                : homeDir;
            vi.stubEnv('GEMINI_WRITE_SYSTEM_MD', customPath);
            getCoreSystemPrompt(mockConfig);
            expect(fs.writeFileSync).toHaveBeenCalledWith(path.resolve(expectedPath), expect.any(String));
        });
    });
});
describe('resolvePathFromEnv helper function', () => {
    beforeEach(() => {
        vi.resetAllMocks();
    });
    describe('when envVar is undefined, empty, or whitespace', () => {
        it.each([
            ['undefined', undefined],
            ['empty string', ''],
            ['whitespace only', '   \n\t  '],
        ])('should return null for %s', (_, input) => {
            const result = resolvePathFromEnv(input);
            expect(result).toEqual({
                isSwitch: false,
                value: null,
                isDisabled: false,
            });
        });
    });
    describe('when envVar is a boolean-like string', () => {
        it.each([
            ['"0" as disabled switch', '0', '0', true],
            ['"false" as disabled switch', 'false', 'false', true],
            ['"1" as enabled switch', '1', '1', false],
            ['"true" as enabled switch', 'true', 'true', false],
            ['"FALSE" (case-insensitive)', 'FALSE', 'false', true],
            ['"TRUE" (case-insensitive)', 'TRUE', 'true', false],
        ])('should handle %s', (_, input, expectedValue, isDisabled) => {
            const result = resolvePathFromEnv(input);
            expect(result).toEqual({
                isSwitch: true,
                value: expectedValue,
                isDisabled,
            });
        });
    });
    describe('when envVar is a file path', () => {
        it.each([['/absolute/path/file.txt'], ['relative/path/file.txt']])('should resolve path: %s', (input) => {
            const result = resolvePathFromEnv(input);
            expect(result).toEqual({
                isSwitch: false,
                value: path.resolve(input),
                isDisabled: false,
            });
        });
        it.each([
            ['~/documents/file.txt', 'documents/file.txt'],
            ['~', ''],
        ])('should expand tilde path: %s', (input, homeRelativePath) => {
            const homeDir = '/Users/test';
            vi.spyOn(os, 'homedir').mockReturnValue(homeDir);
            const result = resolvePathFromEnv(input);
            expect(result).toEqual({
                isSwitch: false,
                value: path.resolve(homeRelativePath ? path.join(homeDir, homeRelativePath) : homeDir),
                isDisabled: false,
            });
        });
        it('should handle os.homedir() errors gracefully', () => {
            vi.spyOn(os, 'homedir').mockImplementation(() => {
                throw new Error('Cannot resolve home directory');
            });
            const consoleSpy = vi.spyOn(console, 'warn').mockImplementation(() => { });
            const result = resolvePathFromEnv('~/documents/file.txt');
            expect(result).toEqual({
                isSwitch: false,
                value: null,
                isDisabled: false,
            });
            expect(consoleSpy).toHaveBeenCalledWith('Could not resolve home directory for path: ~/documents/file.txt', expect.any(Error));
            consoleSpy.mockRestore();
        });
    });
});
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