class GitNuke

# File lib/git-nuke.rb, line 15
def initialize(test=false)
  @pdelay = 0.01 # constant for arrow speed
  @testing = test
  @verify = !test
end

# File lib/git-nuke.rb, line 21
def fire(args = [])
  opts = args.select {|a| a[0] == "-" }
  opts.each {|o| parse_opt o }
  exit 0 if (@testing || opts.first)
  parse_arg((args - opts).first)
end

# File lib/git-nuke.rb, line 53
def git_root
  %x{git rev-parse --show-toplevel}
end

# File lib/git-nuke.rb, line 48
def no_repo?
  `git status 2>&1`.split("\n").first ==
    "fatal: Not a git repository (or any of the parent directories): .git"
end

# File lib/git-nuke.rb, line 108
def nuke(remote, root)
  # remove the git repo from this computer
  if !@testing
    tree = Dir.glob("*", File::FNM_DOTMATCH).select {|d| not ['.','..'].include? d }
    FileUtils.rmtree (tree)
  end

  cloner = "git clone \"#{remote}\" \"#{root}\""

  puts "Recloned successfully.".green if system(cloner)
end

# File lib/git-nuke.rb, line 61
def nukebanner
  25.times { |x| slowp "\rREADYING NUKE| ".red << "~" * x << "#==>".red }
  25.times { |x| slowp "\rREADYING NUKE| ".red << " " * x << "~" * (25 - x) << "#==>".yellow }
  printf "\rNUKE READY.".red << " " * 50 << "\n"
end

# File lib/git-nuke.rb, line 44
def parse_arg(a)
  a.nil?? verify(remote) : verify(remote(a))
end

# File lib/git-nuke.rb, line 33
def parse_opt(o)
  case o
  when "--force", "-f"
    @verify = false
  when "--help", "-h"
    puts GitNuke::Help
  when "--version", "-v"
    puts GitNuke::Version
  end
end

# File lib/git-nuke.rb, line 28
def pexit(msg)
  puts msg
  exit 1
end

# File lib/git-nuke.rb, line 73
def remote(search = /.*/)
  pexit "Not currently in a git repository.".yellow if no_repo?

  r = remotes.find { |gr| gr.match search }

  pexit "No remotes found in this repository.".yellow if remotes.nil?

  if r.nil?
    errmsg = "No remotes found that match #{search.to_s.red}. All remotes:\n" + remotes.join("\n")
    pexit errmsg
    return errmsg
  else
    return r
  end
end

# File lib/git-nuke.rb, line 57
def remotes
  %x{git remote -v}.split("\n").map { |r| r.split[1] }.uniq
end

# File lib/git-nuke.rb, line 67
def slowp(x)
  sleep @pdelay
  printf x
end

# File lib/git-nuke.rb, line 90
def verify(r)
  nukebanner
  puts "Remote source:\t".red << r
  puts "Local target:\t".red << git_root

  if @verify
    puts "Warning: this will completely overwrite the local copy.".yellow
    printf "Continue recloning local repo? [yN] ".yellow
    unless $stdin.gets.chomp.downcase[0] == "y"
      puts "Nuke aborted.".green
      return
    end
  end

  nuke remote, git_root.chomp unless @testing
end