#!/usr/bin/env ruby
# frozen_string_literal: true

require 'dotenv'
require 'debug'
require_relative '../lib/utils/system_information_gather'
require_relative '../lib/utils/database_manager'
require_relative '../lib/utils/first_run_init'
require_relative '../lib/utils/utilities'
require_relative '../lib/utils/logg_man'
require_relative '../lib/utils/alert_queue_manager'
require_relative '../lib/utils/alert_manager'

include Utilities # rubocop:disable Style/MixinUsage
# binding.b(do: 'irb')
@loggman = LoggMan.new

begin
  # Create .env file if it doesn't exist
  File.open('.env', 'w') {} unless File.exist?('.env')

  # Load environment variables from .env file
  Dotenv.load

  # Initialize AlertQueueManager, RingBuffer, and AlertManager
  @alert_queue_manager = AlertQueueManager.new(@loggman)

  # Initialize DatabaseManager
  db_manager = DatabaseManager.new(@loggman, @alert_queue_manager)

  # Get database details from environment variables
  db_details = {
    username: ENV['DB_USERNAME'],
    password: ENV['DB_PASSWORD'],
    key: ENV['DB_SECRET_KEY'],
    database: ENV['DB_DATABASE']
  }

  # Decrypt password
  dec_pass = decrypt_string_chacha20(db_details[:password], db_details[:key])

  # If any of the necessary details are missing, run the first run setup
  if db_details.values.any?(&:nil?)
    @loggman.log_warn('Missing or incomplete configuration. Running first run setup.')
    first_run_init = FirstRunInit.new(@loggman, @alert_queue_manager, db_manager)
    first_run_init.run
    # Reload environment variables after first run setup
    Dotenv.load
    db_details = {
      username: ENV['DB_USERNAME'],
      password: ENV['DB_PASSWORD'],
      key: ENV['DB_SECRET_KEY'],
      database: ENV['DB_DATABASE']
    }
    # Decrypt password again after potentially updating config
    dec_pass = decrypt_string_chacha20(db_details[:password], db_details[:key])
  end

  # Test connection
  unless db_manager.test_db_connection(db_details[:username], dec_pass, db_details[:database])
    @loggman.log_warn('Failed to connect to the database with existing configuration. Please re-enter your details.')
    first_run_init = FirstRunInit.new(@loggman, @alert_queue_manager, db_manager)
    first_run_init.run
    # Reload environment variables after potentially updating config
    Dotenv.load
    db_details = {
      username: ENV['DB_USERNAME'],
      password: ENV['DB_PASSWORD'],
      key: ENV['DB_SECRET_KEY'],
      database: ENV['DB_DATABASE']
    }
    # Decrypt password again after potentially updating config
    dec_pass = decrypt_string_chacha20(db_details[:password], db_details[:key])
  end

  # Test connection again after potentially updating config
  if db_manager.test_db_connection(db_details[:username], dec_pass, db_details[:database])
    @loggman.log_info('Successfully connected to the database.')
  else
    @loggman.log_error('Failed to connect to the database. Please check your configuration.')
    exit 1
  end

  @loggman.log_warn('Program successfully ran with no errors')

  # TODO: Add the rest of application logic here

  # End of the program

  # wait for the alert_queue_manager to block before we exit.
  @alert_queue_manager.shutdown

  # Shush Rubocop. I know I shouldn't rescue an exception. I am just using it to log exceptions so the
  # program doesn't crash silently
rescue Exception => e # rubocop:disable Lint/RescueException
  # Log the exception
  @loggman.log_error("An unhandled exception has occurred: #{e.class}: #{e.message}")
  @loggman.log_error(e.backtrace.join("\n"))

  # Re-raise the original exception
  raise
end