'''
Script to generate Kivy API from source code.

Code is messy, but working.
Be careful if you change anything in !

'''

ignore_list = (
    'kivy._clock',
    'kivy._event',
    'kivy.factory_registers',
    'kivy.graphics.buffer',
    'kivy.graphics.vbo',
    'kivy.graphics.vertex',
    'kivy.uix.recycleview.__init__',
    'kivy.setupconfig',
    'kivy.version',
    'kivy._version'
)

import os
import sys
from glob import glob

import kivy

# force loading of kivy modules
import kivy.app
import kivy.metrics
import kivy.atlas
import kivy.context
import kivy.core.audio
import kivy.core.camera
import kivy.core.clipboard
import kivy.core.gl
import kivy.core.image
import kivy.core.spelling
import kivy.core.text
import kivy.core.text.markup
import kivy.core.video
import kivy.core.window
import kivy.geometry
import kivy.graphics
import kivy.graphics.shader
import kivy.graphics.tesselator
import kivy.animation
import kivy.modules.console
import kivy.modules.keybinding
import kivy.modules.monitor
import kivy.modules.touchring
import kivy.modules.inspector
import kivy.modules.recorder
import kivy.modules.screen
import kivy.modules.joycursor
import kivy.storage
import kivy.storage.dictstore
import kivy.storage.jsonstore
import kivy.storage.redisstore
import kivy.network.urlrequest
import kivy.modules.webdebugger
import kivy.support
try:
    import kivy.tools.packaging.pyinstaller_hooks
except ImportError:
    pass
import kivy.input.recorder
import kivy.interactive
import kivy.garden
from kivy.factory import Factory
from kivy.lib import ddsfile, mtdev

# check for silenced build
BE_QUIET = True
if os.environ.get('BE_QUIET') == 'False':
    BE_QUIET = False

# force loading of all classes from factory
for x in list(Factory.classes.keys())[:]:
    getattr(Factory, x)

# Directory of doc
base_dir = os.path.dirname(__file__)
dest_dir = os.path.join(base_dir, 'sources')
examples_framework_dir = os.path.join(base_dir, '..', 'examples', 'framework')

# Check touch file
base = 'autobuild.py-done'
with open(os.path.join(base_dir, base), 'w') as f:
    f.write('')


def writefile(filename, data):
    global dest_dir
    # avoid to rewrite the file if the content didn't change
    f = os.path.join(dest_dir, filename)
    if not BE_QUIET:
        print('write', filename)
    if os.path.exists(f):
        with open(f) as fd:
            if fd.read() == data:
                return
    h = open(f, 'w')
    h.write(data)
    h.close()


# Activate Kivy modules
'''
for k in kivy.kivy_modules.list().keys():
    kivy.kivy_modules.import_module(k)
'''


# Search all kivy module
l = [(x, sys.modules[x],
      os.path.basename(sys.modules[x].__file__).rsplit('.', 1)[0])
      for x in sys.modules if x.startswith('kivy') and sys.modules[x]]


# Extract packages from modules
packages = []
modules = {}
api_modules = []
for name, module, filename in l:
    if name in ignore_list:
        continue
    if not any([name.startswith(x) for x in ignore_list]):
        api_modules.append(name)
    if filename == '__init__':
        packages.append(name)
    else:
        if hasattr(module, '__all__'):
            modules[name] = module.__all__
        else:
            modules[name] = [x for x in dir(module) if not x.startswith('__')]

packages.sort()

# Create index
api_index = '''API Reference
-------------

The API reference is a lexicographic list of all the different classes,
methods and features that Kivy offers.

.. toctree::
    :maxdepth: 1

'''
api_modules.sort()
for package in api_modules:
    api_index += "    api-%s.rst\n" % package

writefile('api-index.rst', api_index)


# Create index for all packages
# Note on displaying inherited members;
#     Adding the directive ':inherited-members:' to automodule achieves this
#     but is not always desired. Please see
#         https://github.com/kivy/kivy/pull/3870

template = '\n'.join((
    '=' * 100,
    '$SUMMARY',
    '=' * 100,
    '''
$EXAMPLES_REF

.. automodule:: $PACKAGE
    :members:
    :show-inheritance:

.. toctree::

$EXAMPLES
'''))


template_examples = '''.. _example-reference%d:

Examples
--------

%s
'''

template_examples_ref = ('# :ref:`Jump directly to Examples'
                         ' <example-reference%d>`')


def extract_summary_line(doc):
    """
    :param doc: the __doc__ field of a module
    :return: a doc string suitable for a header or empty string
    """
    if doc is None:
        return ''
    for line in doc.split('\n'):
        line = line.strip()
        # don't take empty line
        if len(line) < 1:
            continue
        # ref mark
        if line.startswith('.. _'):
            continue
        return line

for package in packages:
    summary = extract_summary_line(sys.modules[package].__doc__)
    if summary is None or summary == '':
        summary = 'NO DOCUMENTATION (package %s)' % package
    t = template.replace('$SUMMARY', summary)
    t = t.replace('$PACKAGE', package)
    t = t.replace('$EXAMPLES_REF', '')
    t = t.replace('$EXAMPLES', '')

    # search packages
    for subpackage in packages:
        packagemodule = subpackage.rsplit('.', 1)[0]
        if packagemodule != package or len(subpackage.split('.')) <= 2:
            continue
        t += "    api-%s.rst\n" % subpackage

    # search modules
    m = list(modules.keys())
    m.sort(key=lambda x: extract_summary_line(sys.modules[x].__doc__).upper())
    for module in m:
        packagemodule = module.rsplit('.', 1)[0]
        if packagemodule != package:
            continue
        t += "    api-%s.rst\n" % module

    writefile('api-%s.rst' % package, t)


# Create index for all module
m = list(modules.keys())
m.sort()
refid = 0
for module in m:
    summary = extract_summary_line(sys.modules[module].__doc__)
    if summary is None or summary == '':
        summary = 'NO DOCUMENTATION (module %s)' % module

    # search examples
    example_output = []
    example_prefix = module
    if module.startswith('kivy.'):
        example_prefix = module[5:]
    example_prefix = example_prefix.replace('.', '_')

    # try to found any example in framework directory
    list_examples = glob('%s*.py' % os.path.join(
        examples_framework_dir, example_prefix))
    for x in list_examples:
        # extract filename without directory
        xb = os.path.basename(x)

        # add a section !
        example_output.append('File :download:`%s <%s>` ::' % (
            xb, os.path.join('..', x)))

        # put the file in
        with open(x, 'r') as fd:
            d = fd.read().strip()
            d = '\t' + '\n\t'.join(d.split('\n'))
            example_output.append(d)

    t = template.replace('$SUMMARY', summary)
    t = t.replace('$PACKAGE', module)
    if len(example_output):
        refid += 1
        example_output = template_examples % (
                refid, '\n\n\n'.join(example_output))
        t = t.replace('$EXAMPLES_REF', template_examples_ref % refid)
        t = t.replace('$EXAMPLES', example_output)
    else:
        t = t.replace('$EXAMPLES_REF', '')
        t = t.replace('$EXAMPLES', '')
    writefile('api-%s.rst' % module, t)


# Generation finished
print('Auto-generation finished')