"""Sphinx Guzzle theme."""

import os
import xml.etree.ElementTree as ET

from docutils import nodes
from sphinx.locale import admonitionlabels
from sphinx.writers.html import HTMLTranslator as SphinxHTMLTranslator

from pygments.style import Style
from pygments.token import Keyword, Name, Comment, String, Error, \
     Number, Operator, Generic, Whitespace, Punctuation, Other, Literal


def setup(app):
    """Setup conntects events to the sitemap builder"""
    app.connect('html-page-context', add_html_link)
    app.connect('build-finished', create_sitemap)
    app.sitemap_links = []
    app.set_translator('html', HTMLTranslator)


def add_html_link(app, pagename, templatename, context, doctree):
    """As each page is built, collect page names for the sitemap"""
    base_url = app.config['html_theme_options'].get('base_url', '')
    if base_url:
        app.sitemap_links.append(base_url + pagename + ".html")


def create_sitemap(app, exception):
    """Generates the sitemap.xml from the collected HTML page links"""
    if (not app.config['html_theme_options'].get('base_url', '') or
           exception is not None or
           not app.sitemap_links):
        return

    filename = app.outdir + "/sitemap.xml"
    print("Generating sitemap.xml in %s" % filename)

    root = ET.Element("urlset")
    root.set("xmlns", "http://www.sitemaps.org/schemas/sitemap/0.9")

    for link in app.sitemap_links:
        url = ET.SubElement(root, "url")
        ET.SubElement(url, "loc").text = link

    ET.ElementTree(root).write(filename)


def html_theme_path():
    return [os.path.dirname(os.path.abspath(__file__))]


class HTMLTranslator(SphinxHTMLTranslator):
    def visit_admonition(self, node, name=''):
        """Uses the h3 tag for admonition titles instead of the p tag"""
        self.body.append(self.starttag(
            node, 'div', CLASS=('admonition ' + name)))
        if name:
            title = (
                f"<h3 class='admonition-title'>"
                f"{admonitionlabels[name]}</h3>"
            )
            self.body.append(title)
        self.set_first_last(node)


class GuzzleStyle(Style):
    background_color = "#f8f8f8"
    default_style = ""

    styles = {
        # No corresponding class for the following:
        #Text:                     "", # class:  ''
        Whitespace:                "underline #f8f8f8",      # class: 'w'
        Error:                     "#a40000 border:#ef2929", # class: 'err'
        Other:                     "#000000",                # class 'x'

        Comment:                   "italic #8f5902", # class: 'c'
        Comment.Preproc:           "noitalic",       # class: 'cp'

        Keyword:                   "bold #004461",   # class: 'k'
        Keyword.Constant:          "bold #004461",   # class: 'kc'
        Keyword.Declaration:       "bold #004461",   # class: 'kd'
        Keyword.Namespace:         "bold #004461",   # class: 'kn'
        Keyword.Pseudo:            "bold #004461",   # class: 'kp'
        Keyword.Reserved:          "bold #004461",   # class: 'kr'
        Keyword.Type:              "bold #004461",   # class: 'kt'

        Operator:                  "#582800",   # class: 'o'
        Operator.Word:             "bold #004461",   # class: 'ow' - like keywords

        Punctuation:               "bold #000000",   # class: 'p'

        # because special names such as Name.Class, Name.Function, etc.
        # are not recognized as such later in the parsing, we choose them
        # to look the same as ordinary variables.
        Name:                      "#000000",        # class: 'n'
        Name.Attribute:            "#006EC4",        # class: 'na' - to be revised
        Name.Builtin:              "#004461",        # class: 'nb'
        Name.Builtin.Pseudo:       "#3465a4",        # class: 'bp'
        Name.Class:                "#000000",        # class: 'nc' - to be revised
        Name.Constant:             "#000000",        # class: 'no' - to be revised
        Name.Decorator:            "#888",           # class: 'nd' - to be revised
        Name.Entity:               "#ce5c00",        # class: 'ni'
        Name.Exception:            "bold #cc0000",   # class: 'ne'
        Name.Function:             "#000000",        # class: 'nf'
        Name.Property:             "#000000",        # class: 'py'
        Name.Label:                "#f57900",        # class: 'nl'
        Name.Namespace:            "#000000",        # class: 'nn' - to be revised
        Name.Other:                "#000000",        # class: 'nx'
        Name.Tag:                  "bold #004461",   # class: 'nt' - like a keyword
        Name.Variable:             "#000000",        # class: 'nv' - to be revised
        Name.Variable.Class:       "#000000",        # class: 'vc' - to be revised
        Name.Variable.Global:      "#000000",        # class: 'vg' - to be revised
        Name.Variable.Instance:    "#000000",        # class: 'vi' - to be revised

        Number:                    "#990000",        # class: 'm'

        Literal:                   "#000000",        # class: 'l'
        Literal.Date:              "#000000",        # class: 'ld'

        String:                    "#4e9a06",        # class: 's'
        String.Backtick:           "#4e9a06",        # class: 'sb'
        String.Char:               "#4e9a06",        # class: 'sc'
        String.Doc:                "italic #8f5902", # class: 'sd' - like a comment
        String.Double:             "#4e9a06",        # class: 's2'
        String.Escape:             "#4e9a06",        # class: 'se'
        String.Heredoc:            "#4e9a06",        # class: 'sh'
        String.Interpol:           "#4e9a06",        # class: 'si'
        String.Other:              "#4e9a06",        # class: 'sx'
        String.Regex:              "#4e9a06",        # class: 'sr'
        String.Single:             "#4e9a06",        # class: 's1'
        String.Symbol:             "#4e9a06",        # class: 'ss'

        Generic:                   "#000000",        # class: 'g'
        Generic.Deleted:           "#a40000",        # class: 'gd'
        Generic.Emph:              "italic #000000", # class: 'ge'
        Generic.Error:             "#ef2929",        # class: 'gr'
        Generic.Heading:           "bold #000080",   # class: 'gh'
        Generic.Inserted:          "#00A000",        # class: 'gi'
        Generic.Output:            "#888",           # class: 'go'
        Generic.Prompt:            "#745334",        # class: 'gp'
        Generic.Strong:            "bold #000000",   # class: 'gs'
        Generic.Subheading:        "bold #800080",   # class: 'gu'
        Generic.Traceback:         "bold #a40000",   # class: 'gt'
    }