/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { getPackageJson, FatalSandboxError, } from 'sixth-cli-core';
import commandExists from 'command-exists';
import * as os from 'node:os';
import { fileURLToPath } from 'node:url';
import path from 'node:path';
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const VALID_SANDBOX_COMMANDS = [
    'docker',
    'podman',
    'sandbox-exec',
];
function isSandboxCommand(value) {
    return VALID_SANDBOX_COMMANDS.includes(value);
}
function getSandboxCommand(sandbox) {
    // If the SANDBOX env var is set, we're already inside the sandbox.
    if (process.env['SANDBOX']) {
        return '';
    }
    // note environment variable takes precedence over argument (from command line or settings)
    const environmentConfiguredSandbox = process.env['GEMINI_SANDBOX']?.toLowerCase().trim() ?? '';
    sandbox =
        environmentConfiguredSandbox?.length > 0
            ? environmentConfiguredSandbox
            : sandbox;
    if (sandbox === '1' || sandbox === 'true')
        sandbox = true;
    else if (sandbox === '0' || sandbox === 'false' || !sandbox)
        sandbox = false;
    if (sandbox === false) {
        return '';
    }
    if (typeof sandbox === 'string' && sandbox) {
        if (!isSandboxCommand(sandbox)) {
            throw new FatalSandboxError(`Invalid sandbox command '${sandbox}'. Must be one of ${VALID_SANDBOX_COMMANDS.join(', ')}`);
        }
        // confirm that specified command exists
        if (commandExists.sync(sandbox)) {
            return sandbox;
        }
        throw new FatalSandboxError(`Missing sandbox command '${sandbox}' (from GEMINI_SANDBOX)`);
    }
    // look for seatbelt, docker, or podman, in that order
    // for container-based sandboxing, require sandbox to be enabled explicitly
    if (os.platform() === 'darwin' && commandExists.sync('sandbox-exec')) {
        return 'sandbox-exec';
    }
    else if (commandExists.sync('docker') && sandbox === true) {
        return 'docker';
    }
    else if (commandExists.sync('podman') && sandbox === true) {
        return 'podman';
    }
    // throw an error if user requested sandbox but no command was found
    if (sandbox === true) {
        throw new FatalSandboxError('GEMINI_SANDBOX is true but failed to determine command for sandbox; ' +
            'install docker or podman or specify command in GEMINI_SANDBOX');
    }
    return '';
}
export async function loadSandboxConfig(settings, argv) {
    const sandboxOption = argv.sandbox ?? settings.tools?.sandbox;
    const command = getSandboxCommand(sandboxOption);
    const packageJson = await getPackageJson(__dirname);
    const image = process.env['GEMINI_SANDBOX_IMAGE'] ?? packageJson?.config?.sandboxImageUri;
    return command && image ? { command, image } : undefined;
}
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