import { writeFileSync } from 'node:fs';
import { join } from 'node:path';
import { Command } from 'commander';
import pc from 'picocolors';
import { ConfigSchema, type Config } from '../config/types.ts';
import { ensureWorkspace, resolvePath, checkWorkspaceEmpty, syncTemplates } from './utils.ts';

export function onboardCommand(program: Command): void {
  program
    .command('onboard [path]')
    .description('Initialize a new nanobot workspace with config and templates')
    .action(async (rawPath?: string) => {
      try {
        const targetPath = resolvePath(rawPath ?? '~/.config/nanobot');
        const configPath = join(targetPath, 'config.json');

        console.info(pc.blue('Initializing nanobot workspace...'));
        console.info(pc.dim(`Target path: ${targetPath}`));

        // Check if directory exists and is not empty
        checkWorkspaceEmpty(targetPath);

        // Create workspace directory
        ensureWorkspace(targetPath);
        console.info(pc.green('✓ Created workspace directory'));

        // Write default config
        const defaultConfig: Config = ConfigSchema.parse({});
        writeFileSync(configPath, JSON.stringify(defaultConfig, null, 2), 'utf8');
        console.info(pc.green('✓ Created config.json'));

        // Sync templates
        const createdFiles = syncTemplates(targetPath);
        for (const file of createdFiles) {
          console.info(pc.dim(`  Created ${file}`));
        }

        console.info();
        console.info(pc.green('nanobot workspace initialized successfully!'));
        console.info();
        console.info(pc.bold('Next steps:'));
        console.info(`  1. Edit ${pc.cyan(configPath)} to add your API keys`);
        console.info(`  2. Customize ${pc.cyan(join(targetPath, 'USER.md'))} with your preferences`);
        console.info(`  3. Start chatting: ${pc.cyan('bun run nanobot agent')}`);
        console.info();
        console.info(pc.dim('For Mattermost integration, configure the channels.mattermost section in config.json'));
      } catch (err) {
        console.error(pc.red(String(err)));
        process.exit(1);
      }
    });
}