#!/usr/bin/ruby
require 'rubygems'
require 'optparse'
require 'i2cssh'

i2_options, ssh_options, servers = {}, [], []

optparse = OptionParser.new do |opts|
    opts.banner = "Usage: #{File.basename(__FILE__)} [options]"

    # SSH options
    opts.on '-A', '--forward-agent',
        'Enable SSH agent forwarding' do
        ssh_options << '-A'
    end
    opts.on '-l', '--login LOGIN',
        'SSH login name' do |u|
        ssh_options << "-l #{u}"
    end

    # iTerm2 options
    opts.on '-F', '--fullscreen',
        'Make the window fullscreen' do
        i2_options[:fullscreen] = true
    end
    opts.on '-C', '--columns COLUMNS', Integer,
        'Number of columns (rows will be calculated)' do |c|
        i2_options[:columns] = c
    end
    opts.on '-R', '--rows ROWS', Integer,
        'Number of rows (columns will be calculated)' do |r|
        if i2_options[:columns]
            puts "ERROR: -C and -R can't be used at the same time"
            puts optparse.help
            exit
        else
            i2_options[:rows] = r
        end
    end

    # Hosts
    opts.on '-f', '--file FILE',
        'Cluster file (one hostname per line)' do |f|
        servers += File.read(f).split "\n"
    end
    opts.on '-c', '--cluster CLUSTERNAME',
        'Name of the cluster specified in ~/.i2csshrc' do |c|
        require 'yaml'
        config_hash = YAML.load File.read File.expand_path '~/.i2csshrc'
        cluster = config_hash["clusters"][c]
        if cluster
          servers += cluster
        else
          puts "ERROR: unknown cluster #{c}"
          puts optparse.help
          exit 1
        end
    end
    opts.on '-m', '--machines a,b,c', Array,
        'Comma-separated list of hosts' do |h|
        servers += h
    end
end
optparse.parse!

if servers.empty?
    puts "ERROR: no servers given"
    puts optparse.help
    exit
end

I2Cssh.new servers, ssh_options, i2_options