import click
import shutil

from pathlib import Path
from datetime import datetime

from ._natural_sort import natural_sort

DEVELOPER_DRIVE = Path("/mnt/e/")
PATH_ISSUES = DEVELOPER_DRIVE / "Safeguard-MBP-issues"
PATH_WORKBOOKS = DEVELOPER_DRIVE / "Safeguard MBP Workbooks"
PATH_WIN_DESKTOP = Path("/mnt/c/Users/Holgi/Desktop")

TODAY = datetime.now().strftime("%y%m%d")


def _folder_content(folder):
    nondotted = (i for i in folder.iterdir() if not i.stem.startswith("."))
    return (i for i in nondotted if not i.stem.startswith("~"))


def _files_in_folder(folder, suffix):
    files = (f for f in _folder_content(folder) if f.is_file())
    return (f for f in files if f.suffix == suffix)


def get_latest_version(parent=PATH_ISSUES):
    folders = (i for i in _folder_content(parent) if i.is_dir())
    versions = natural_sort(f.name for f in folders if f.stem.lower().startswith("v"))
    return versions[-1]


def copy_changelog(destination, date, latest):
    textfiles = _files_in_folder(PATH_ISSUES, ".txt")
    changelog = next(f for f in textfiles if f.stem.lower().startswith("change"))
    new_path = destination / f"{date}_CHANGELOG_{latest}.txt"
    print(changelog.name, "->", new_path)
    shutil.copyfile(changelog, new_path)


def copy_workbook_changelogs(destination, date, latest):
    source = PATH_ISSUES / latest
    textfiles = _files_in_folder(source, ".txt")
    logs = (f for f in textfiles if f.stem.lower().startswith("change"))
    for log_file in logs:
        parts = log_file.stem.split("_")
        if parts[-1] == latest:
            new_path = destination / f"{date}_{log_file.name}"
        else:
            new_path = destination / f"{date}_{log_file.stem}_{latest}.txt"
        print(log_file.name, "->", new_path)
        shutil.copyfile(log_file, new_path)


def copy_workbooks(destination, date, latest):
    for excel_file in _files_in_folder(PATH_WORKBOOKS, ".xlsx"):
        new_path = destination / f"{date}_{excel_file.stem}_{latest}.xlsx"
        print(excel_file.name, "->", new_path)
        shutil.copyfile(excel_file, new_path)


@click.command()
def cli():
    latest = get_latest_version()

    new_folder_name = f"{TODAY} {latest}"
    new_folder_path = PATH_WIN_DESKTOP / new_folder_name
    if new_folder_path.exists():
        raise IOError(f"Folder exists on desktop: {new_folder_name}")
    else:
        new_folder_path.mkdir()

    copy_workbooks(new_folder_path, TODAY, latest)
    copy_workbook_changelogs(new_folder_path, TODAY, latest)
    copy_changelog(new_folder_path, TODAY, latest)