import { Command } from 'commander';
import chalk from 'chalk';
import inquirer from 'inquirer';
import open from 'open';
import ora from 'ora';
import fs from 'fs';
import os from 'os';
import path from 'path';
import { AuthApi, Configuration, OAuthLoginRequestDTOTypeEnum } from '@nestbox-ai/admin';
import axios from 'axios';

export function registerLoginCommand(program: Command): void {
  program
    .command('login <nestbox-domain>')
    .description('Login using Google SSO')
    .action(async (domain: string) => {
      console.log('Login command triggered for domain:', domain);
      const spinner = ora('Initiating Google login...').start();

      try {
        // Determine the protocol and construct the auth URL based on the provided domain
        let authUrl;
        if (domain.includes('localhost')) {
          // Use HTTP for localhost and specific port
          authUrl = `http://${domain}/cli/auth`;
        } else {
          // Use HTTPS for all other domains
          authUrl = `https://${domain}/cli/auth`;
        }

        spinner.text = 'Opening browser for Google authentication...';

        // Open the browser for authentication
        await open(authUrl);
        spinner.succeed('Browser opened for authentication');

        // Prompt user to paste the combined token and API URL
        const { combinedInput } = await inquirer.prompt<{ combinedInput: string }>([
          {
            type: 'input',
            name: 'combinedInput',
            message: 'After authenticating, please paste the data here:',
            validate: (input) => input.trim().length > 0 || 'Input is required'
          }
        ]);

        // Split the input by comma
        const [accessToken, apiServerUrl] = combinedInput.split(',').map(item => item.trim());

        if (!accessToken || !apiServerUrl) {
          spinner.fail('Invalid input format. Expected: token,apiServerUrl');
          return;
        }

        console.log(chalk.green('Credentials received. Extracting user information...'));

        // Fetch user data from the token
        let email = '';
        let name = '';
        let picture = '';
        try {
          // Try to decode JWT to get user data (email, name, picture, etc.)
          const tokenParts = accessToken.split('.');
          if (tokenParts.length === 3) {
            // Base64 decode the payload part of JWT
            const base64Payload = tokenParts[1].replace(/-/g, '+').replace(/_/g, '/');
            const decodedPayload = Buffer.from(base64Payload, 'base64').toString('utf-8');
            const tokenPayload = JSON.parse(decodedPayload);

            // Extract user information
            email = tokenPayload.email || '';
            name = tokenPayload.name || '';
            picture = tokenPayload.picture || '';
          }
        } catch (e) {
          console.log(chalk.yellow('Could not decode token payload. Will prompt for email.'));
        }

        // If email couldn't be extracted from token, prompt user
        if (!email) {
          const response = await inquirer.prompt<{ email: string }>([
            {
              type: 'input',
              name: 'email',
              message: 'Enter your email address:',
              validate: (input) => /\S+@\S+\.\S+/.test(input) || 'Please enter a valid email'
            }
          ]);
          email = response.email;
        }

        spinner.start('Verifying access token...');

        if (apiServerUrl && email && accessToken) {
          // Verify the access token
          const configuration = new Configuration({
            basePath: apiServerUrl,
            accessToken: accessToken,
          });
          const authApi = new AuthApi(configuration);
          try {
            const response = await authApi.authControllerOAuthLogin({
              providerId: accessToken,
              type: OAuthLoginRequestDTOTypeEnum.Google,
              email,
              profilePictureUrl: picture || '',
            });
            const authResponse = response.data;

            // Save credentials to file
            try {
              // Create directory structure
              const configDir = path.join(os.homedir(), '.config', '.nestbox');
              if (!fs.existsSync(configDir)) {
                fs.mkdirSync(configDir, { recursive: true });
              }

              // Create the file path
              const fileName = `${email.replace('@', '_at_')}_${domain}.json`;
              const filePath = path.join(configDir, fileName);

              // Create credentials object
              const credentials = {
                domain,
                email,
                token: authResponse.token,
                accessToken, // Save the original accessToken
                apiServerUrl,
                name,
                picture,
                timestamp: new Date().toISOString()
              };

              // Write to file
              fs.writeFileSync(filePath, JSON.stringify(credentials, null, 2));

              spinner.succeed('Authentication successful');
              console.log(chalk.green(`Successfully logged in as ${email}`));
              console.log(chalk.blue(`Credentials saved to: ${filePath}`));
            } catch (fileError) {
              spinner.warn('Authentication successful, but failed to save credentials file');
              console.error(chalk.yellow('File error:'), fileError instanceof Error ? fileError.message : 'Unknown error');

            }
          } catch (authError) {
            spinner.fail('Failed to verify access token');
            if (axios.isAxiosError(authError) && authError.response) {
              if (authError.response.data.message === "user.not_found") {
                console.error(chalk.red('Authentication Error:'), "You need to register your email with the Nestbox platform");
                const { openSignup } = await inquirer.prompt<{ openSignup: boolean }>([
                  {
                    type: 'confirm',
                    name: 'openSignup',
                    message: 'Would you like to open the signup page to register?',
                    default: true
                  }
                ]);
          
                if (openSignup) {
                  // Construct signup URL with the same protocol logic as login
                  let signupUrl;
                  if (domain.includes('localhost')) {
                    signupUrl = `http://${domain}`;
                  } else {
                    signupUrl = `https://${domain}`;
                  }
                  
                  console.log(chalk.blue(`Opening signup page: ${signupUrl}`));
                  await open(signupUrl);
              }
            }
            } else {
              console.error(chalk.red('Authentication Error:'), authError instanceof Error ? authError.message : 'Unknown error');
            }
          }
        } else {
          spinner.fail('Missing required information for authentication');
        }
      } catch (error) {
        spinner.fail('Authentication failed');
        console.error(chalk.red('Error:'), error instanceof Error ? error.message : 'Unknown error');
      }
    });
}