import os
import random
import string
import tempfile
import subprocess  # noqa: S404
from typing import Set
from pathlib import Path
from datetime import datetime
from dataclasses import field, dataclass


@dataclass
class ElabUser:
    name: str
    group: str
    write_acl: Set = field(default_factory=set)
    read_acl: Set = field(default_factory=set)

    def __str__(self):
        """return a string representation"""
        return self.name

    def set_new_password(self, htpasswd_path, length=10, handler=subprocess):
        """sets a new random password for a user"""
        characters = string.ascii_letters + string.digits
        password = "".join(
            random.choice(characters) for i in range(length)  # noqa: S311
        )
        handler.check_call(
            ["htpasswd", "-b", htpasswd_path, self.name, password]
        )
        return password

    def delete_password(self, htpasswd_path, handler=subprocess):
        """deletes a password for a user"""
        # if the user was not added to the password db, the removal will show
        # an error message that is confusing to the user - at least it
        # confused me - so redirect this to /dev/null
        with open(os.devnull, "wb") as devnull:
            handler.check_call(
                ["htpasswd", "-D", htpasswd_path, self.name], stderr=devnull
            )

    def create_new_repository(self, data_dir, handler=subprocess):
        """creates a repository for a user and checks in some stuff"""
        # create the new repository
        data_dir = Path(data_dir)
        new_repo = data_dir / self.name
        handler.check_call(
            ["svnadmin", "create", str(new_repo)], stderr=handler.STDOUT
        )

        with tempfile.TemporaryDirectory() as tmpdir:
            tmpdir = Path(tmpdir)
            # check out a temporary working copy
            handler.check_call(
                ["svn", "checkout", f"file://{new_repo}", str(tmpdir)]
            )
            # create subfolders
            today = datetime.now()
            year_path = tmpdir / f"{today.year:0>4}"
            year_path.mkdir()
            for month in range(today.month, 13):
                month_path = year_path / f"{month:0>2}"
                month_path.mkdir()
                handler.check_call(["touch", str(month_path / ".empty")])
            # copy some examples
            for temp in ("experiment", "synthesis", "toc"):
                filename = f"template-{temp}.doc"
                in_file = data_dir / filename
                out_file = tmpdir / filename
                handler.check_call(["cp", str(in_file), str(out_file)])
            # add and commit the changes
            handler.check_call(
                ["svn", "add", "--force", str(tmpdir) + "/"]  # noqa: S604
            )
            handler.check_call(
                ["svn", "commit", "-m", f"New User: {self.name}", str(tmpdir)]
            )