#!/usr/bin/env python3

from pdf_data import get_page_pdf
from datatypes import *
from enum import Enum, auto
import subprocess
import pydbus
import argparse
import formatter.typst as typst_fmt

parser = argparse.ArgumentParser()
parser.add_argument("--section", help="Copy reference to the section title instead of the page number.", action="store_true")


class LinkFormat(Enum):
    TYPST = auto()


def clip_copy(txt: str):
    try:
        subprocess.run(["xsel", "-ib"], text=True, input=txt)
    except OSError as e:
        raise Exception("Please install `xsel`.") from e


def copy_ref(ref: Reference, format: LinkFormat) -> None:
    """Formats Reference and copies it to clipboard."""
    match format:
        case LinkFormat.TYPST:
            link_txt = typst_fmt.ref(ref)

    clip_copy(link_txt)


def notify(title:str, txt: str) -> None:
    """Send a text notification."""
    bus = pydbus.SessionBus()
    notifs = bus.get(".Notifications")
    notifs.Notify("instantref", 0, "dialog-information", title, txt, [], {}, 5000)


if __name__ == "__main__":
    args = parser.parse_args()

    if args.section:
        raise NotImplementedError("--section isn't implemented")

    ref = get_page_pdf()

    format = LinkFormat.TYPST
    copy_ref(ref, format)
    notify("Copied ref", f"{ref.filepath.name} p. {ref.page}")