class TrueClass
    def to_str
        return self.to_s
    end
end

class FalseClass
    def to_str
        return self.to_s
    end
end

def require_deps
    [
        ['mechanize', 'mechanize', 'for HTTP requests'],
    ].each do |gem, package, reason|
        Gem.clear_paths if Gem
        begin
            require package
        rescue ScriptError
            install_dep(gem, reason)
            Gem.clear_paths if Gem
            require package
        end
    end
end

def install_dep(package, reason)
    name = Script.current.name
    line = '-'*50
    msg = []
    msg << line
    msg << "#{name} requires the '#{package}' RubyGem #{reason}."
    msg << ''
    unless RUBY_VERSION =~ /^(\d+)\.(\d+)/
        msg << "It is not able to automatically install it because it cannot determine what version of Ruby you are running."
        msg << "The automatic install requires Ruby 2.4 or later.  Your current version is listed as #{RUBY_VERSION.inspect}"
        msg << ''
        msg << "Please update your Ruby install and/or install sequel manually, then try again."
        msg << line
        respond msg
        exit
    end
    major = $1.to_i
    minor = $2.to_i

    unless Gem
        msg << "'Gem' does not appear to be available."
        msg << ''
        msg << "Please update your Ruby install, install gem', or install sequel manually, then try again."
        msg << line
        respond msg
        exit
    end

    warning = nil

    if major == 2
        if minor < 4
            warning = "Your version of Ruby (#{RUBY_VERSION}) is probably too old for automatic installation to succeed."

        end
    elsif major < 2
        warning = "Your version of Ruby (#{RUBY_VERSION}) is too old for Lich(!) much less this script."
    else
        warning = "Your version of Ruby (#{RUBY_VERSION}) is too new and exotic, and the outcome of automatic installation is not guaranteed."
    end

    if warning
        msg << warning
        msg << "If you want to attempt automatic installation anyways:"
    else
        msg << "If you want to attempt automatic installation:"
    end
    msg << "    #{$lich_char}unpause #{name}"
    msg << ''
    msg << "Otherwise:"
    msg << "    #{$lich_char}kill #{name}"
    msg << line
    respond msg

    pause_script

    echo "Installing #{package}.  This may take a minute..."
    Gem.install(package, verbose: true)
    Gem.clear_paths
end
require_deps

require 'rubygems'
require 'mechanize'