import { Command } from 'commander';
import chalk from 'chalk';
import inquirer from 'inquirer';
import fs from 'fs';
import os from 'os';
import path from 'path';
import { getAuthToken, listCredentials, removeCredentials } from '../../utils/auth';

export function registerLogoutCommand(program: Command): void {
  program
    .command('logout [nestbox-domain]')
    .description('Logout from Nestbox platform')
    .action(async (domain?: string) => {
      try {
        const authToken = getAuthToken(domain);
        if (!authToken) {
          console.log(chalk.yellow('No authentication token found. Please log in first.'));
          return;
        }

        // Function to remove all credential files for a domain
        const removeCredentialFiles = (domain: string) => {
          try {
            const configDir = path.join(os.homedir(), '.config', '.nestbox');
            if (!fs.existsSync(configDir)) {
              return false;
            }

            // Sanitize domain for file matching
            // Replace characters that are problematic in filenames
            const sanitizedDomain = domain.replace(/:/g, '_');

            // Get all files in the directory
            const files = fs.readdirSync(configDir);

            // Find and remove all files that match the domain
            let removedCount = 0;
            for (const file of files) {
              // Check if the file matches any of the possible domain formats
              if (
                file.endsWith(`_${domain}.json`) ||
                file.endsWith(`_${sanitizedDomain}.json`)
              ) {
                fs.unlinkSync(path.join(configDir, file));
                removedCount++;
              }
            }

            return removedCount > 0;
          } catch (error) {
            console.warn(chalk.yellow(`Warning: Could not remove credential files. ${error instanceof Error ? error.message : ''}`));
            return false;
          }
        };

        if (domain) {
          // Logout from specific domain
          // Remove credentials using utility function 
          const removed = removeCredentials(domain);

          // Also remove all credential files for this domain
          const filesRemoved = removeCredentialFiles(domain);

          if (removed || filesRemoved) {
            console.log(chalk.green(`Successfully logged out from ${domain}`));
          } else {
            console.log(chalk.yellow(`No credentials found for ${domain}`));
          }
        } else {
          // Ask which domain to logout from
          const credentials = listCredentials();

          if (credentials.length === 0) {
            console.log(chalk.yellow('No credentials found'));
            return;
          }

          // Group credentials by domain
          const domains = Array.from(new Set(credentials.map(cred => cred.domain)));
          const domainChoices = domains.map(domain => {
            const accounts = credentials.filter(cred => cred.domain === domain);
            return `${domain} (${accounts.length} account${accounts.length > 1 ? 's' : ''})`;
          });

          const { selected } = await inquirer.prompt<{ selected: string }>([
            {
              type: 'list',
              name: 'selected',
              message: 'Select domain to logout from:',
              choices: domainChoices,
            }
          ]);

          // Extract domain from the selected choice
          const selectedDomain = selected.split(' ')[0];

          // Remove credentials using utility function
          removeCredentials(selectedDomain);

          // Also remove all credential files for this domain
          removeCredentialFiles(selectedDomain);

          console.log(chalk.green(`Successfully logged out from ${selectedDomain}`));
        }
      } catch (error) {
        const err = error as Error;
        console.error(chalk.red('Error:'), err.message);
      }
    });
}