# -*- coding: utf-8 -*-
"""Generate view."""

from bobtemplates.plone.base import base_prepare_renderer
from bobtemplates.plone.base import git_commit
from bobtemplates.plone.base import update_file
from lxml import etree
from mrbob.bobexceptions import SkipQuestion

import os
import stringcase


def get_view_name_from_python_class(configurator, question):
    """Generate view default name from python class"""
    view_class_name = configurator.variables['viewlet_python_class_name']
    view_generated_name = stringcase.snakecase(view_class_name).replace('_', '-')  # NOQA: E501
    question.default = view_generated_name


def get_template_name_default(configurator, question):
    if configurator.variables['viewlet_template']:
        viewlet_name = configurator.variables['viewlet_name']
        template_default_name = stringcase.snakecase(viewlet_name)
        question.default = template_default_name
    else:
        question.default = 'viewlet'


def check_viewlet_template_answer(configurator, question):
    if not configurator.variables['viewlet_template']:
        raise SkipQuestion(u'No view template, so we skip view template name question.')  # NOQA: E501


def _update_configure_zcml(configurator):
    file_name = u'configure.zcml'
    file_path = configurator.variables['package_folder'] + '/' + file_name
    namespaces = '{http://namespaces.zope.org/zope}'

    with open(file_path, 'r') as xml_file:
        parser = etree.XMLParser(remove_blank_text=True)
        tree = etree.parse(xml_file, parser)
        tree_root = tree.getroot()
        view_xpath = "{0}include[@package='.viewlets']".format(namespaces)
        if len(tree_root.findall(view_xpath)):
            print(
                '.viewlets already in configure.zcml, skip adding!',
            )
            return

    match_str = '<!--<includeDependencies package="." />-->'
    insert_str = """
  <include package=".viewlets" />
"""
    update_file(configurator, file_path, match_str, insert_str)


def _update_viewlets_configure_zcml(configurator):
    file_name = u'configure.zcml'
    directory_path = configurator.variables['package_folder'] + '/viewlets/'
    file_path = directory_path + file_name
    configure_example_file_path = configurator.variables['package_folder'] + '/viewlets/configure.zcml.example'  # NOQA: E501
    file_list = os.listdir(os.path.dirname(directory_path))
    if file_name not in file_list:
        os.rename(configure_example_file_path, file_path)
    namespaces = '{http://namespaces.zope.org/zope}'

    with open(file_path, 'r') as xml_file:
        parser = etree.XMLParser(remove_blank_text=True)
        tree = etree.parse(xml_file, parser)
        tree_root = tree.getroot()
        view_xpath = "{0}browser:viewlet[@name='{1}']".format(
            namespaces,
            configurator.variables['viewlet_name'],
        )
        if len(tree_root.findall(view_xpath)):
            print(
                '{0} already in configure.zcml, skip adding!'.format(
                    configurator.variables['viewlet_name'],
                ),
            )
            return

    match_str = '-*- extra stuff goes here -*-'

    if configurator.variables['viewlet_template']:
        insert_str = """
  <browser:viewlet
     name="{0}"
     for="plone.app.contenttypes.interfaces.IDocument"
     manager="plone.app.layout.viewlets.interfaces.IAboveContentTitle"
     layer="{1}.interfaces.{2}"
     class=".{3}.{4}"
     template="{5}.pt"
     permission="zope2.View"
     />
""".format(
            configurator.variables['viewlet_name'],
            configurator.variables['package.dottedname'],
            configurator.variables['browser_layer'],
            configurator.variables['viewlet_python_file_name'],
            configurator.variables['viewlet_python_class_name'],
            configurator.variables['viewlet_template_name'],
        )

    else:
        insert_str = """
  <browser:viewlet
     name="{0}"
     for="plone.app.contenttypes.interfaces.IDocument"
     manager="plone.app.layout.viewlets.interfaces.IAboveContentTitle"
     layer="{1}.interfaces.{2}"
     class=".{3}.{4}"
     permission="zope2.View"
     />
""".format(
            configurator.variables['viewlet_name'],
            configurator.variables['package.dottedname'],
            configurator.variables['browser_layer'],
            configurator.variables['viewlet_python_file_name'],
            configurator.variables['viewlet_python_class_name'],
        )

    update_file(configurator, file_path, match_str, insert_str)


def _delete_unwanted_files(configurator):
    directory_path = configurator.variables['package_folder'] + '/viewlets/'
    if not configurator.variables['viewlet_template']:
        template_file_name = u'{0}.pt'.format(
            configurator.variables['viewlet_template_name'],
        )
        file_path = directory_path + template_file_name
        os.remove(file_path)

    file_name = u'configure.zcml.example'
    file_list = os.listdir(os.path.dirname(directory_path))
    if file_name in file_list:
        file_path = directory_path + file_name
        os.remove(file_path)


def prepare_renderer(configurator):
    """Prepare rendering."""
    configurator = base_prepare_renderer(configurator)
    configurator.variables['template_id'] = 'viewlet'
    viewlet_name = configurator.variables['viewlet_name'].strip('_')
    normalized_viewlet_name = stringcase.snakecase(viewlet_name)
    configurator.variables['viewlet_name_normalized'] = normalized_viewlet_name
    if not configurator.variables['viewlet_template']:
        configurator.variables['viewlet_template_name'] = normalized_viewlet_name  # NOQA: E501
    python_class_name = configurator.variables['viewlet_python_class_name'].strip('_')  # NOQA: E501
    configurator.variables['viewlet_python_class_name'] = stringcase.pascalcase(      # NOQA: E501
        python_class_name,
    )
    viewlet_python_file_name = stringcase.snakecase(viewlet_name)
    configurator.variables['viewlet_python_file_name'] = viewlet_python_file_name    # NOQA: E501
    configurator.target_directory = configurator.variables['package_folder']
    package_name = configurator.variables['package.dottedname'].replace('.', '_')  # NOQA: E501
    browser_layer = stringcase.pascalcase(package_name)
    configurator.variables['browser_layer'] = 'I{0}Layer'.format(browser_layer)


def post_renderer(configurator):
    """Post rendering."""
    _update_configure_zcml(configurator)
    _update_viewlets_configure_zcml(configurator)
    _delete_unwanted_files(configurator)
    git_commit(
        configurator,
        'Add viewlet: {0}'.format(
            configurator.variables['viewlet_name'],
        ),
    )
