class Importmap::Commands

def self.exit_on_failure?
  false
end

def audit
  vulnerable_packages = npm.vulnerable_packages
  if vulnerable_packages.any?
    table = [["Package", "Severity", "Vulnerable versions", "Vulnerability"]]
    vulnerable_packages.each { |p| table << [p.name, p.severity, p.vulnerable_versions, p.vulnerability] }
    puts_table(table)
    vulnerabilities = 'vulnerability'.pluralize(vulnerable_packages.size)
    severities = vulnerable_packages.map(&:severity).tally.sort_by(&:last).reverse
                                    .map { |severity, count| "#{count} #{severity}" }
                                    .join(", ")
    puts "  #{vulnerable_packages.size} #{vulnerabilities} found: #{severities}"
    exit 1
  else
    puts "No vulnerable packages found"
  end
end

def json
  require Rails.root.join("config/environment")
  puts Rails.application.importmap.to_json(resolver: ActionController::Base.helpers)
end

def npm
  @npm ||= Importmap::Npm.new
end

def outdated
  if (outdated_packages = npm.outdated_packages).any?
    table = [["Package", "Current", "Latest"]]
    outdated_packages.each { |p| table << [p.name, p.current_version, p.latest_version || p.error] }
    puts_table(table)
    packages = 'package'.pluralize(outdated_packages.size)
    puts "  #{outdated_packages.size} outdated #{packages} found"
    exit 1
  else
    puts "No outdated packages found"
  end
end

def packager
  @packager ||= Importmap::Packager.new
end

def packages
  puts npm.packages_with_versions.map { |x| x.join(' ') }
end

def pin(*packages)
  if imports = packager.import(*packages, env: options[:env], from: options[:from])
    imports.each do |package, url|
      puts %(Pinning "#{package}" to #{packager.vendor_path}/#{package}.js via download from #{url})
      packager.download(package, url)
      pin = packager.vendored_pin_for(package, url)
      if packager.packaged?(package)
        gsub_file("config/importmap.rb", /^pin "#{package}".*$/, pin, verbose: false)
      else
        append_to_file("config/importmap.rb", "#{pin}\n", verbose: false)
      end
    end
  else
    puts "Couldn't find any packages in #{packages.inspect} on #{options[:from]}"
  end
end

def pristine
  packages = npm.packages_with_versions.map do |p, v|
    v.blank? ? p : [p, v].join("@")
  end
  if imports = packager.import(*packages, env: options[:env], from: options[:from])
    imports.each do |package, url|
      puts %(Downloading "#{package}" to #{packager.vendor_path}/#{package}.js from #{url})
      packager.download(package, url)
    end
  else
    puts "Couldn't find any packages in #{packages.inspect} on #{options[:from]}"
  end
end

def puts_table(array)
  column_sizes = array.reduce([]) do |lengths, row|
    row.each_with_index.map{ |iterand, index| [lengths[index] || 0, iterand.to_s.length].max }
  end
  divider = "|" + (column_sizes.map { |s| "-" * (s + 2) }.join('|')) + '|'
  array.each_with_index do |row, row_number|
    row = row.fill(nil, row.size..(column_sizes.size - 1))
    row = row.each_with_index.map { |v, i| v.to_s + " " * (column_sizes[i] - v.to_s.length) }
    puts "| " + row.join(" | ") + " |"
    puts divider if row_number == 0
  end
end

def remove_line_from_file(path, pattern)
  path = File.expand_path(path, destination_root)
  all_lines = File.readlines(path)
  with_lines_removed = all_lines.select { |line| line !~ pattern }
  File.open(path, "w") do |file|
    with_lines_removed.each { |line| file.write(line) }
  end
end

def unpin(*packages)
  if imports = packager.import(*packages, env: options[:env], from: options[:from])
    imports.each do |package, url|
      if packager.packaged?(package)
        puts %(Unpinning and removing "#{package}")
        packager.remove(package)
      end
    end
  else
    puts "Couldn't find any packages in #{packages.inspect} on #{options[:from]}"
  end
end

def update
  if (outdated_packages = npm.outdated_packages).any?
    pin(*outdated_packages.map(&:name))
  else
    puts "No outdated packages found"
  end
end