from abc import ABC, abstractmethod

from html5tagger import HTML, Builder, Document

from sanic import __version__ as VERSION
from sanic.application.logo import SVG_LOGO_SIMPLE
from sanic.pages.css import CSS


class BasePage(ABC, metaclass=CSS):  # no cov
    """Base page for Sanic pages."""

    TITLE = "Sanic"
    HEADING = None
    CSS: str
    doc: Builder

    def __init__(self, debug: bool = True) -> None:
        self.debug = debug

    @property
    def style(self) -> str:
        """Returns the CSS for the page.

        Returns:
            str: The CSS for the page.
        """
        return self.CSS

    def render(self) -> str:
        """Renders the page.

        Returns:
            str: The rendered page.
        """
        self.doc = Document(self.TITLE, lang="en", id="sanic")
        self._head()
        self._body()
        self._foot()
        return str(self.doc)

    def _head(self) -> None:
        self.doc.style(HTML(self.style))
        with self.doc.header:
            self.doc.div(self.HEADING or self.TITLE)

    def _foot(self) -> None:
        with self.doc.footer:
            self.doc.div("powered by")
            with self.doc.div:
                self._sanic_logo()
            if self.debug:
                self.doc.div(f"Version {VERSION}")
                with self.doc.div:
                    for idx, (title, href) in enumerate(
                        (
                            ("Docs", "https://sanic.dev"),
                            ("Help", "https://sanic.dev/en/help.html"),
                            ("GitHub", "https://github.com/sanic-org/sanic"),
                        )
                    ):
                        if idx > 0:
                            self.doc(" | ")
                        self.doc.a(
                            title,
                            href=href,
                            target="_blank",
                            referrerpolicy="no-referrer",
                        )
                self.doc.div("DEBUG mode")

    @abstractmethod
    def _body(self) -> None:
        ...

    def _sanic_logo(self) -> None:
        self.doc.a(
            HTML(SVG_LOGO_SIMPLE),
            href="https://sanic.dev",
            target="_blank",
            referrerpolicy="no-referrer",
        )
