#!/usr/bin/env ruby

require "fretboards"
require "fretboards/renderer/svg"
require "docopt"

doc = <<DOCOPT
Output a SVG fretboard.

Usage:
  #{__FILE__} [options] [<dots>...]
  #{__FILE__} (--tuning=<tuning> | --guitar | --ukulele) [options] [<dots>...]
  #{__FILE__} -h | --help
  #{__FILE__} --version

Options:
  --tuning=<tuning>   Tuning of the instrument [default: g' c' e' a'].
  --width=<width>     Width of the fretboard [default: 108].
  --height=<height>   Height of the fretboard [default: 180].
  --fret-count=<fret-count>   Number of frets [default: 4].
  --title=<title>     Title of the fretboard [default: ].
  -h --help           Show this screen.
  --version           Show version.

Arguments:
  <dots>  Dots to be drawn on the fretboard. Defaults to 4 strings and ukulele tuning. Actual tuning pitches are only considered when passing the dot marks as pitches.

Dots are specified as a sequence of numbers, one per string, starting from 0. Use x for a muted string.

  #{__FILE__} 0 2 1 2

You can also specify dots as pitches, a to g.

- Use `is` suffix for sharp, `es` for flat.
- Use `'` or `,` for octaves up or down. `c'` is middle C.

  #{__FILE__} aes\\' d\\' f\\' b\\'

Draw guitar fretboard passing `--guitar` or `--guitar-7`:

  #{__FILE__} --guitar x 3 2 0 1 0

Use `[` and `]` to indicate barres:

  #{__FILE__} --guitar 1\\[ 3 3 2 1 1\\]

Mark a dot as root with `!`:

  #{__FILE__} --guitar 3! 2 0 0 3 3

Annotate fingerings with `-`:

  #{__FILE__} --guitar 3-2 2-1 0 0 3-3 3-4

To place multiple dots on the same string, use `/`:

  #{__FILE__} --guitar 5/6 8/6 5/5 7/5 5/4 7/4 5/3 7/3 5/2 8/2 5/1 8/1

Report bugs at https://github.com/choan/fretboards/issues
DOCOPT

begin
  arguments = Docopt::docopt(doc, version: ::Fretboards::VERSION)
rescue Docopt::Exit => e
  puts e.message
  exit
end

if arguments['--guitar']
  arguments['--tuning'] = "e, a, d g b e'"
elsif arguments['--guitar-7']
  arguments['--tuning'] = "b,, e, a, d g b e'"
elsif arguments['--ukulele']
  arguments['--tuning'] = "g' c' e' a'"
end

terse = arguments['<dots>']
tuning = arguments['--tuning'].split(' ')
title = arguments['--title']
width = arguments['--width'].to_i
height = arguments['--height'].to_i
fret_count = arguments['--fret-count'].to_i

fb = Fretboards::Fretboard.new(:tuning => tuning)
fb.title = title unless title.empty?
fb.terse(terse)
renderer = Fretboards::Renderer::Svg.new(width: width, height: height, fret_count: fret_count)
puts renderer.render(fb)