'''
Copyright 2010 Expert Sleepers. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are
permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice, this list of
      conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright notice, this list
      of conditions and the following disclaimer in the documentation and/or other materials
      provided with the distribution.

THIS SOFTWARE IS PROVIDED BY EXPERT SLEEPERS ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EXPERT SLEEPERS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those of the
authors and should not be interpreted as representing official policies, either expressed
or implied, of Expert Sleepers.
'''

'''
Script to rewrite calibration data according to a microtonal scale.
v1.0.0 (14/1/2010)
'''

import sys, math, copy
import CalibrationData as cd

def noteName( note ):
	f, i = math.modf( note/12.0 )
	i = int(i)
	octave = i-1
	n = int( note - 12*i )
	return [ 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B' ][ n ] + str(octave)

def retune( cd, baseNote, details ):
	# baseNote = note number of root of the scale
	# e.g. 60 is a C

	# centsTable = table of relative tunings from the root
	centsTable = [ 0 ]
	if details == None or details == 'just12':
		# just intonation (http://en.wikipedia.org/wiki/Just_intonation) 
		# with the missing semitones needed for a chromatic scale
		centsTable = [ 0, 112, 204, 316, 386, 498, 610, 702, 814, 884, 996, 1088 ]
	elif details == 'just7':
		# just intonation (http://en.wikipedia.org/wiki/Just_intonation)
		centsTable = [ 0, 204, 386, 498, 702, 884, 1088 ]
	elif details == 'srutis':
		# 22 Srutis (http://en.wikipedia.org/wiki/Just_intonation)
		centsTable = [ 0, 90, 112, 182, 204, 294, 316, 386, 408, 520, 498, 590, 610, 702, 792, 814, 884, 906, 996, 1018, 1088, 1110 ]
	else:
		# interpret details as a string list of cent values
		centsTable = [ float(x) for x in details.split( ',' ) ]

	scaleLen = len(centsTable)
	print 'tuning to a %d note scale based on %s' % ( scaleLen, noteName(baseNote) )
	
	rootNote = baseNote
	rootShift = 0
	while rootNote > 0:
		rootNote -= scaleLen
		rootShift += 1

	valid = [ i for i, v in enumerate( cd._valid ) if v ]
	firstValid = valid[0]
	lastValid = valid[-1]
	valid = copy.copy( cd._valid )
	values = copy.copy( cd._values )
	for i in range( firstValid, lastValid+1 ):
		note = i - rootNote
		f, oct = math.modf( note/float(scaleLen) )
		oct = int(oct)
		n = int( note - scaleLen * oct )
		cents = centsTable[ n ]
		relativeOctave = oct - rootShift
		temperedNote = baseNote + 12 * relativeOctave + 0.01 * cents
		if temperedNote < 0 or temperedNote > lastValid:
			valid[ i ] = False
			continue
		valid[ i ] = True
		values[ i ] = cd.value( temperedNote )
	cd._valid = valid
	cd._values = values
	

cd = cd.CalibrationData()
filename =  sys.argv[1]
cd.load( filename )
baseNote = 60
if len(sys.argv) > 3:
	baseNote = int( sys.argv[3] )
details = None
if len(sys.argv) > 4:
	details = sys.argv[4]

retune( cd, baseNote, details )

cd.save( sys.argv[2] )
print 'wrote', sys.argv[2]