import logging
import os
import shutil
from pathlib import Path

from tags import Tags


class Library:
    def __init__(self, dir_root: Path):
        self.dir_root = dir_root
        self.dir_orphan = Path(dir_root, '_orphan')
        self.dir_orphan.mkdir(exist_ok=True, parents=True)
    
    def move_to_orphan(self, p: Path) -> None:
        logging.info("%s move to orphan", p)
        shutil.move(os.fspath(p), os.fspath(self.dir_orphan))
    
    def move(self, p: Path, tags: Tags) -> None:
        new_path = self.__compute_path(tags)
        new_path.mkdir(exist_ok=True, parents=True)
        logging.info("%s move to %s", p.name, new_path)
        shutil.move(os.fspath(p), os.fspath(new_path))

    def __compute_path(self, tags: Tags) -> Path:
        p = self.dir_root
        if tags.copyrights == 'original':
            # Originals groups by artist
            p = p / "_originals"
            if tags.artists != "":
                artist = tags.artists.split(" ")[0]
                artist = self.__sanitize(artist)
                if (p / artist).exists():
                    p = p / artist
            return p
        # Main section
        if tags.copyrights != "":
            _copyright = tags.copyrights.split(" ")[0]
            p = p / self.__sanitize(_copyright)
        if tags.characters == "":
            return p
        # Characters section
        characters = tags.characters_sanitized()
        if len(characters) == 1:
            p = p / self.__sanitize(characters[0])
        else:
            p = p / "_multiple"
        return p

    @staticmethod
    def __sanitize(s: str) -> str:
        s = "".join(x for x in s if x.isalnum() or x in "._-()")
        return s.replace("_", " ").strip()