#!/usr/bin/env python3

from pdf_data import get_destination_pdf, get_page_pdf, get_section_pdf
from datatypes import *
from enum import Enum, auto
from util import notify
import subprocess
import argparse
import formatter.typst as typst_fmt

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


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

    if args.section:
        ref = get_section_pdf()
    elif args.destination:
        ref = get_destination_pdf()
    else:
        ref = get_page_pdf()

    format = LinkFormat.TYPST
    copy_ref(ref, format)

    match ref:
        case PDFPage():
            notify("Copied ref", f"{ref.filepath.name} p. {ref.page}")
        case PDFSection():
            notify("Copied ref", f"{ref.filepath.name} sec. {ref.title}")
        case PDFDestination():
            notify("Copied ref", f"{ref.filepath.name} {ref.name}")