#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Galleria directive
"""

import uuid
import json

from docutils import nodes
from docutils.parsers.rst import Directive
import docutils.parsers.rst.directives as directives

from sphinx.writers.html import HTMLTranslator
from sphinx.writers.latex import LaTeXTranslator
from sphinx.writers.texinfo import TexinfoTranslator
from sphinx.writers.text import TextTranslator
from sphinx.writers.manpage import ManualPageTranslator


class galleria(nodes.General, nodes.Element):
    pass


def html_visit_galleria(self: HTMLTranslator, node: galleria) -> None:
    galleria_id = 'galleria-%s' % uuid.uuid4()

    self.body.append(
        "<div id='%s' class='%s'></div>" % (
            galleria_id,
            node['class']
        )
    )

    self.body.append(
        "<script>document.addEventListener('ready', function() {" +
        "SphinxGalleria.run('%s', %s, dataSource=%s).init()});</script>" % (
            galleria_id,
            json.dumps(node['options']),
            json.dumps(node['images'])
        )
    )

    raise nodes.SkipNode


def latex_visit_galleria(self: LaTeXTranslator, node: galleria) -> None:
    for image in node['images']:
        self.body.append('[%s]' % image['description'])
    raise nodes.SkipNode


def texinfo_visit_galleria(self: TexinfoTranslator, node: galleria) -> None:
    for image in node['images']:
        self.body.append('[%s]' % image['description'])
    raise nodes.SkipNode


def text_visit_galleria(self: TextTranslator, node: galleria) -> None:
    for image in node['images']:
        self.body.append('[%s]' % image['description'])
    raise nodes.SkipNode


def gemini_visit_galleria(self, node: galleria) -> None:
    for image in node['images']:
        self.body.append('=> %s %s' % (image['path'], image['description']))
    raise nodes.SkipNode


def man_visit_galleria(self: ManualPageTranslator, node: galleria) -> None:
    if 'description' in node.attributes:
        self.body.append('[%s]' % node['description'])
    raise nodes.SkipNode


class GalleriaDirective(Directive):

    has_content = False
    required_arguments = 1
    final_argument_whitespace = True
    option_spec = {
        "class": directives.unchanged,
        "galleria": directives.unchanged,
        "description": directives.unchanged,
        "title": directives.unchanged,
        "thumbsize": directives.unchanged,
        "transition": directives.unchanged,
    }

    def run(self):
        if not self.state.document.hasattr('galleria_nodes'):
            self.state.document.galleria_nodes = {}

        galleria_name = self.options.get('galleria')
        created = False

        if galleria_name and \
                galleria_name in self.state.document.galleria_nodes:
            node = self.state.document.galleria_nodes[galleria_name]

        else:
            node = galleria()
            node['class'] = 'galleria'
            node['options'] = {
                'transition': 'fade'
            }
            node['images'] = []

            created = True

        if self.options.get('class'):
            node['class'] = self.options['class']
        if self.options.get('transition'):
            node['options']['transition'] = self.options['transition']

        images_path = self.arguments
        for path in images_path:
            image = {}
            image["description"] = self.options.get('description')
            image["title"] = self.options.get('title')
            image["thumbsize"] = self.options.get('thumbsize') or '100x100'
            image["image"] = path
            node['images'].append(image)

        if created:
            return [node]
        return []