class Crispr::CLI

def self.run(argv = ARGV)
  command = argv.shift
  case command
  when "run"
    path = argv.shift
    unless path && File.exist?(path)
      puts "Error: Please specify a valid Ruby file to mutate."
      exit 1
    end
    source = File.read(path)
    mutator = Crispr::Mutator.new(source)
    mutations = mutator.mutations
    if mutations.empty?
      puts "No mutations found."
      exit 0
    end
    mutations.each_with_index do |mutated, index|
      puts "Running mutation #{index + 1}/#{mutations.size}..."
      killed = Crispr::Runner.run_mutation(path: path, mutated_source: mutated)
      puts killed ? "💥 Mutation killed" : "⚠️ Mutation survived"
    end
  else
    puts "Usage: crispr run path/to/file.rb"
    exit 1
  end
end