#!/usr/bin/env python
from waflib.extras import autowaf as autowaf
from waflib import Options
import os
import sys
import re

# Library version (UNIX style major, minor, micro)
# major increment <=> incompatible changes
# minor increment <=> compatible changes (additions)
# micro increment <=> no interface changes
JACKBACKEND_VERSION = '1.0.0'
I18N_PACKAGE = 'jack-backend'

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

def options(opt):
    autowaf.set_options(opt)

def configure(conf):
    autowaf.check_pkg(conf, 'jack', uselib_store='JACK', atleast_version='0.121.0')

    #
    # PortAudio is currently used to get a list of audio device names.
    # We should find a better way to do this that doesn't involve this
    # kind of dependency.
    #
    if Options.options.dist_target == 'mingw':
        autowaf.check_pkg(conf, 'portaudio-2.0', uselib_store='PORTAUDIO',
                          atleast_version='19')
    autowaf.configure(conf)

    if Options.options.libjack_link == 'auto':
        if Options.options.dist_target == 'mingw' or sys.platform == 'darwin':
            conf.env['libjack_link'] = "weak"
        else:
            conf.env['libjack_link'] = "link"
    elif Options.options.libjack_link == 'weak':
        conf.env['libjack_link'] = "weak"
    else:
        conf.env['libjack_link'] = "link"


def build(bld):
    obj = bld(features = 'cxx cxxshlib')
    obj.source = [ 
            'jack_api.cc',
            'jack_connection.cc',
            'jack_audiobackend.cc',
            'jack_portengine.cc',
            'jack_utils.cc',
            'jack_session.cc',
            'weak_libjack.c',
            ]
    obj.includes = ['.']
    obj.name     = 'jack_audiobackend'
    obj.target   = 'jack_audiobackend'
    obj.defines = ['PACKAGE="' + I18N_PACKAGE + '"', 
                   'ARDOURBACKEND_DLL_EXPORTS'
                   ]
    obj.use      = 'libardour libpbd ardouralsautil'
    obj.install_path  = os.path.join(bld.env['LIBDIR'], 'backends')
    obj.cxxflags = [ '-fPIC' ]
    obj.cflags   = [ '-fPIC' ]

    if (bld.env['build_target'] == 'mingw'):
        obj.uselib   = [ 'PORTAUDIO' ]
    else:
        obj.uselib   = [ ]
        obj.vnum     = JACKBACKEND_VERSION

    if bld.env['libjack_link'] == 'link':
        obj.uselib   += [ 'JACK' ]
    else:
        obj.defines += [ 'USE_WEAK_JACK' ]
        obj.deps = [ 'weak_libjack.def' ]

    #
    # device discovery code in the jack backend needs ALSA
    # on Linux.
    # 

    if re.search ("linux", sys.platform) != None:
       obj.uselib += [ 'ALSA' ]

