#!/usr/bin/env python
import datetime
import glob
import os
import rdflib
import shutil
import subprocess
import sys

from waflib.extras import autowaf as autowaf
import waflib.Logs as Logs
import waflib.Options as Options

# Version of this package (even if built as a child)
LV2EXT_VERSION = datetime.date.isoformat(datetime.datetime.now()).replace('-', '.')

# Variables for 'waf dist'
APPNAME = 'lv2world'
VERSION = LV2EXT_VERSION

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

def options(opt):
    opt.load('compiler_cc')
    opt.load('compiler_cxx')
    autowaf.set_options(opt)
    opt.add_option('--test', action='store_true', default=False, dest='build_tests',
                   help="Build unit tests")
    opt.add_option('--experimental', action='store_true', default=False,
                   dest='experimental',
                   help='Install unreleased experimental extensions')
    for i in ['lv2/lv2plug.in/ns/lv2core']:
        opt.recurse(i)

def get_subdirs(with_plugins=True):
    subdirs = ['lv2/lv2plug.in/ns/lv2core/']
    subdirs += glob.glob('lv2/lv2plug.in/ns/ext/*/')
    subdirs += glob.glob('lv2/lv2plug.in/ns/extensions/*/')
    if with_plugins:
        subdirs += glob.glob('plugins/*/')
    return subdirs
    
def configure(conf):
    conf.load('compiler_cc')
    conf.load('compiler_cxx')
    autowaf.configure(conf)
    autowaf.set_recursive()

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

    subdirs = get_subdirs()

    for i in subdirs:
        conf.recurse(i)

    conf.env['LV2_SUBDIRS'] = subdirs

# Rule for copying a file to the build directory
def copy(task):
    shutil.copy(task.inputs[0].abspath(), task.outputs[0].abspath())

def chop_lv2_prefix(s):
    if s.startswith('lv2/lv2plug.in/'):
        return s[len('lv2/lv2plug.in/'):]
    return s

# Rule for calling lv2specgen on a spec bundle
def specgen(task):
    import rdflib
    doap = rdflib.Namespace('http://usefulinc.com/ns/doap#')
    lv2  = rdflib.Namespace('http://lv2plug.in/ns/lv2core#')
    owl  = rdflib.Namespace('http://www.w3.org/2002/07/owl#')
    rdf  = rdflib.Namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')

    sys.path.append("./lv2specgen")
    import lv2specgen

    spec   = task.inputs[0]
    path   = os.path.dirname(spec.srcpath())
    indir  = os.path.dirname(spec.abspath())
    outdir = os.path.abspath(os.path.join(out, chop_lv2_prefix(path)))

    bundle = str(outdir)
    b = os.path.basename(outdir)

    if not os.access(spec.abspath(), os.R_OK):
        print('warning: extension %s has no %s.ttl file' % (root, root))
        return

    try:
        model = rdflib.ConjunctiveGraph()
        for i in glob.glob('%s/*.ttl' % bundle):
            model.parse(i, format='n3')
    except:
        e = sys.exc_info()[1]
        print('error parsing %s: %s' % (bundle, str(e)))
        return

    # Get extension URI
    ext_node = model.value(None, rdf.type, lv2.Specification)
    if not ext_node:
        print('no extension found in %s' % bundle)
        return
    
    ext = str(ext_node)

    # Get version
    minor = 0
    micro = 0
    try:
        minor = int(model.value(ext_node, lv2.minorVersion, None))
        micro = int(model.value(ext_node, lv2.microVersion, None))
    except Exception as e:
        print("warning: %s: failed to find version for %s" % (bundle, ext))

    # Get date
    date = None
    for r in model.triples([ext_node, doap.release, None]):
        revision = model.value(r[2], doap.revision, None)
        if revision == ("%d.%d" % (minor, micro)):
            date = model.value(r[2], doap.created, None)
            break

    # Verify that this date is the latest
    for r in model.triples([ext_node, doap.release, None]):
        revision = model.value(r[2], doap.revision, None)
        this_date = model.value(r[2], doap.created, None)
        if this_date > date:
            print("warning: revision %d.%d (%s) is not the latest release" % (
                minor, micro, date))
            break
    
    # Get short description
    shortdesc = model.value(ext_node, doap.shortdesc, None)

    SPECGENDIR = 'lv2specgen'
    STYLEPATH  = 'build/aux/style.css'
    TAGFILE    = 'build/tags'

    specdoc = lv2specgen.specgen(
        spec.abspath(),
        SPECGENDIR,
        os.path.relpath('doc', bundle),
        os.path.relpath(STYLEPATH, bundle),
        os.path.abspath('build'),
        'doc/html/',
        TAGFILE,
        instances=True)

    lv2specgen.save(task.outputs[0].abspath(), specdoc)

    # Name (comment is to act as a sort key)
    row = '<tr><!-- %s --><td><a rel="rdfs:seeAlso" href="%s">%s</a></td>' % (
        b, path[len('lv2/lv2plug.in/ns/'):], b)

    # Description
    if shortdesc:
        row += '<td>' + str(shortdesc) + '</td>'
    else:
        row += '<td></td>'

    # Version
    version_str = '%s.%s' % (minor, micro)
    if minor == 0 or (micro % 2 != 0):
        row += '<td><span style="color: red">' + version_str + '</span></td>'
    else:
        row += '<td>' + version_str + '</td>'

    # Date
    row += '<td>%s</td>' % (str(date) if date else '')

    # Status
    deprecated = model.value(ext_node, owl.deprecated, None)
    if minor == 0:
        row += '<td><span class="error">Experimental</span></td>'
    elif deprecated and str(deprecated[2]) != "false":
        row += '<td><span class="warning">Deprecated</span></td>'
    elif micro % 2 == 0:
        row += '<td><span class="success">Stable</span></td>'

    row += '</tr>'

    index = open(os.path.join('build', 'index_rows', b), 'w')
    index.write(row)
    index.close()

def subst_file(template, output, dict):
    i = open(template, 'r')
    o = open(output, 'w')
    for line in i:
        for key in dict:
            line = line.replace(key, dict[key])
        o.write(line)
    i.close()
    o.close()

# Task to build extension index
def build_index(task):
    global index_lines
    rows = []
    for f in task.inputs:
        if not f.abspath().endswith('index.html.in'):
            rowfile = open(f.abspath(), 'r')
            rows += rowfile.readlines()
            rowfile.close()

    subst_file(task.inputs[0].abspath(), task.outputs[0].abspath(),
               { '@ROWS@': ''.join(rows),
                 '@TIME@': datetime.datetime.utcnow().strftime('%F %H:%M UTC') })

def build(bld):
    for i in bld.env['LV2_SUBDIRS']:
        bld.recurse(i)

    if bld.env['DOCS']:
        # Build Doxygen documentation (and tags file)
        autowaf.build_dox(bld, 'LV2', VERSION, top, out)

        # Copy stylesheet to build directory
        obj = bld(rule     = copy,
                  name     = 'copy',
                  source   = 'doc/style.css',
                  target   = 'aux/style.css')

        index_files = []

        # Generate .htaccess files (and directory skeleton)
        for i in bld.env['LV2_SUBDIRS']:
            if i.startswith('lv2/lv2plug.in'):
                # Copy spec files to build dir
                for f in bld.path.ant_glob(i + '*.*'):
                    obj = bld(rule   = copy,
                              name   = 'copy',
                              source = f,
                              target = chop_lv2_prefix(f.srcpath()))

                base = i[len('lv2/lv2plug.in'):]
                name = os.path.basename(i[:len(i)-1])
                index_file = os.path.join('index_rows', name)
                index_files += [index_file]

                # Generate .htaccess file
                obj = bld(features     = 'subst',
                          source       = 'doc/htaccess.in',
                          target       = os.path.join(base, '.htaccess'),
                          install_path = None,
                          NAME         = name,
                          BASE         = base)

                bld.add_group()

                # Call lv2specgen to generate spec docs
                obj  = bld(rule   = specgen,
                           name   = 'specgen',
                           source = os.path.join(i, name + '.ttl'),
                           target = ['%s%s.html' % (chop_lv2_prefix(i), name),
                                     index_file])

        # Build extension index
        obj = bld(rule   = build_index,
                  name   = 'index',
                  source = ['lv2/lv2plug.in/ns/index.html.in'] + index_files,
                  target = 'ns/index.html')

def release(ctx):
    lv2  = rdflib.Namespace('http://lv2plug.in/ns/lv2core#')
    rdf  = rdflib.Namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#')
    doap = rdflib.Namespace('http://usefulinc.com/ns/doap#')

    try:
        shutil.rmtree('build/spec')
    except:
        pass

    os.makedirs('build/spec')

    manifests = glob.glob('lv2/lv2plug.in/ns/lv2core/manifest.ttl')
    manifests += glob.glob('lv2/lv2plug.in/ns/*/*/manifest.ttl')
    for manifest in manifests:
        dir = os.path.dirname(manifest)
        name = os.path.basename(dir).replace('.lv2', '')

        m = rdflib.ConjunctiveGraph()
        m.parse(manifest, format='n3')

        uri = minor = micro = None
        try:
            spec  = m.value(None, rdf.type, lv2.Specification)
            uri   = str(spec)
            minor = int(m.value(spec, lv2.minorVersion, None))
            micro = int(m.value(spec, lv2.microVersion, None))
        except:
            e = sys.exc_info()[1]
            Logs.error('error: %s: %s' % (manifest, str(e)))
            continue

        if minor != 0 and micro % 2 == 0:
            autowaf.display_header('\nBuilding %s Release\n' % dir)
            try:
                subprocess.call(
                    ['./waf', 'distclean', 'configure', 'build', 'distcheck'],
                    cwd=dir)
                for i in glob.glob(dir + '/*.tar.bz2'):
                    shutil.move(i, 'build/spec')
            except:
                Logs.error('Error building %s release' % (name, e))

            subprocess.call(['./waf', 'distclean'], cwd=dir)

def news(ctx):
    ctx.recurse(get_subdirs(False))

def lint(ctx):
    for i in (['lv2/lv2plug.in/ns/lv2core/lv2.h']
              + glob.glob('lv2/lv2plug.in/ns/ext/*/*.h')
              + glob.glob('lv2/lv2plug.in/ns/extensions/*/*.h')):
        subprocess.call('cpplint.py --filter=+whitespace/comments,-whitespace/tab,-whitespace/braces,-whitespace/labels,-whitespace/blank_line,-build/header_guard,-readability/casting,-readability/todo,-build/include ' + i, shell=True)