/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { access, cp, mkdir, readdir, writeFile } from 'node:fs/promises';
import { join, dirname, basename } from 'node:path';
import { fileURLToPath } from 'node:url';
import { debugLogger } from 'sixth-cli-core';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const EXAMPLES_PATH = join(__dirname, 'examples');
async function pathExists(path) {
    try {
        await access(path);
        return true;
    }
    catch (_e) {
        return false;
    }
}
async function createDirectory(path) {
    if (await pathExists(path)) {
        throw new Error(`Path already exists: ${path}`);
    }
    await mkdir(path, { recursive: true });
}
async function copyDirectory(template, path) {
    await createDirectory(path);
    const examplePath = join(EXAMPLES_PATH, template);
    const entries = await readdir(examplePath, { withFileTypes: true });
    for (const entry of entries) {
        const srcPath = join(examplePath, entry.name);
        const destPath = join(path, entry.name);
        await cp(srcPath, destPath, { recursive: true });
    }
}
async function handleNew(args) {
    if (args.template) {
        await copyDirectory(args.template, args.path);
        debugLogger.log(`Successfully created new extension from template "${args.template}" at ${args.path}.`);
    }
    else {
        await createDirectory(args.path);
        const extensionName = basename(args.path);
        const manifest = {
            name: extensionName,
            version: '1.0.0',
        };
        await writeFile(join(args.path, 'gemini-extension.json'), JSON.stringify(manifest, null, 2));
        debugLogger.log(`Successfully created new extension at ${args.path}.`);
    }
    debugLogger.log(`You can install this using "gemini extensions link ${args.path}" to test it out.`);
}
async function getBoilerplateChoices() {
    const entries = await readdir(EXAMPLES_PATH, { withFileTypes: true });
    return entries
        .filter((entry) => entry.isDirectory())
        .map((entry) => entry.name);
}
export const newCommand = {
    command: 'new <path> [template]',
    describe: 'Create a new extension from a boilerplate example.',
    builder: async (yargs) => {
        const choices = await getBoilerplateChoices();
        return yargs
            .positional('path', {
            describe: 'The path to create the extension in.',
            type: 'string',
        })
            .positional('template', {
            describe: 'The boilerplate template to use.',
            type: 'string',
            choices,
        });
    },
    handler: async (args) => {
        await handleNew({
            path: args['path'],
            template: args['template'],
        });
    },
};
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