#!/usr/bin/env python
import os
import shutil
import subprocess
from waflib.extras import autowaf as autowaf

# Version of this package (even if built as a child)
BLIP_VERSION = '0.0.0'

# Variables for 'waf dist'
APPNAME = 'blip.lv2'
VERSION = BLIP_VERSION

# Mandatory variables
top = '.'
out = 'build'

def options(opt):
    opt.load('compiler_c')
    autowaf.set_options(opt)

def configure(conf):
    conf.load('compiler_c')
    autowaf.configure(conf)
    autowaf.display_header('Blip Configuration')

    autowaf.check_pkg(conf, 'lv2core', uselib_store='LV2CORE')

    conf.check(function_name = 'sinf',
               header_name   = 'math.h',
               linkflags     = '-lm',
               define_name   = 'HAVE_SINF',
               mandatory     = False)

    conf.env.append_unique('CFLAGS', '-std=c99')

    conf.write_config_header('config.h', remove=False)

    # Set env['pluginlib_PATTERN']
    pat = conf.env['cshlib_PATTERN']
    if pat[0:3] == 'lib':
        pat = pat[3:]
    conf.env['pluginlib_PATTERN'] = pat
    conf.env['pluginlib_EXT'] = pat[pat.rfind('.'):]

    conf.define('BLIP_SHLIB_EXT', conf.env['pluginlib_EXT'])

    autowaf.display_msg(conf, "LV2 bundle directory",
                        conf.env['LV2DIR'])
    print('')

def build_plugin(bld, lang, bundle, name, source, cflags=[], libs=[]):
    # Build plugin library
    penv = bld.env.derive()
    penv['cshlib_PATTERN']   = bld.env['pluginlib_PATTERN']
    obj              = bld(features = '%s %sshlib' % (lang,lang))
    obj.env          = penv
    obj.source       = source
    obj.includes     = [ '.', './src/include' ]
    obj.name         = name
    obj.target       = os.path.join(bundle, name)
    obj.uselib       = ['LV2CORE']
    if cflags != []:
        obj.cflags = cflags
    if libs != []:
        autowaf.use_lib(bld, obj, libs)
    obj.install_path = '${LV2DIR}/' + bundle

    # Install data file
    data_file = '%s.ttl' % name
    bld.install_files('${LV2DIR}/' + bundle, os.path.join(bundle, data_file))

def build(bld):
    # Copy data files to build bundle (build/blip.lv2)
    def do_copy(task):
        src = task.inputs[0].abspath()
        tgt = task.outputs[0].abspath()
        return shutil.copy(src, tgt)

    for i in bld.path.ant_glob('blip.lv2/*.ttl'):
        bld(rule   = do_copy,
            source = i,
            target = bld.path.get_bld().make_node('blip.lv2/%s' % i),
            install_path = '${LV2DIR}/blip.lv2')

    bld(features     = 'subst',
        source       = 'blip.lv2/manifest.ttl.in',
        target       = bld.path.get_bld().make_node('blip.lv2/manifest.ttl'),
        LIB_EXT      = bld.env['pluginlib_EXT'],
        install_path = '${LV2DIR}/blip.lv2')

    plugins = '''
		adsr
		adsr_gt
		amp
		branch
		dahdsr
		difference
		fmod
		interpolator
		product
		random
		ratio
		sum
		sync_pulse
		sync_square
		tracker
	'''.split()
#		quantiser.so
#		sequencer.so

    # Simple (single source file) plugins
    for i in plugins:
        build_plugin(bld, 'c', 'blip.lv2', i,
                     ['src/%s.c' % i])

    # Low pass filter
    build_plugin(bld, 'c', 'blip.lv2', 'lp4pole',
                 ['src/lp4pole.c', 'src/lp4pole_filter.c'])

    # Oscillators
    for i in ['pulse', 'sawtooth', 'square', 'triangle']:
        build_plugin(bld, 'c', 'blip.lv2', i,
                     ['src/%s.c' % i, 'src/wavedata.c'])

    # Wavegen
    wavegen = bld(features     = 'c cprogram',
                  source       = ['src/wavegen.c', 'src/wdatutil.c'],
                  target       = 'src/wavegen',
                  name         = 'wavegen',
                  after        = ['parabola', 'sawtooth', 'square'],
                  includes     = ['./src', './src/include'],
                  linkflags    = ['-lm'],
                  install_path = None)

    penv = bld.env.derive()
    penv['cshlib_PATTERN'] = bld.env['pluginlib_PATTERN']

    bld.add_group()  # Ensure wavegen is built before the following objects

    # Waveform data
    for i in ['parabola', 'sawtooth', 'square']:
        obj = bld(rule = '${SRC} -r 48000 -f 12 -s 1 -m 128 -g 1.0 -w %s -p %s -o ${TGT}' % (i, i),
                  source = bld.path.get_bld().make_node('src/wavegen'),
                  target = 'src/%s_data.c' % i,
                  name = i)

        obj = bld(features     = 'c cshlib',
                  source       = bld.path.get_bld().make_node('src/%s_data.c' % i),
                  target       = 'blip.lv2/%s_data' % i,
                  includes     = ['./src', './src/include'],
                  env          = penv,
                  install_path = '${LV2DIR}/blip.lv2')


              
def lint(ctx):
    subprocess.call('cpplint.py --filter=+whitespace/comments,-whitespace/tab,-whitespace/braces,-whitespace/labels,-build/header_guard,-readability/casting,-readability/todo,-build/include src/* serd/*', shell=True)