from __future__ import annotations

from collections import defaultdict
from enum import Enum
from typing import List, Dict, Set, Tuple, Optional, Iterable, Generator
from urllib.parse import urlparse, ParseResult
from dataclasses import dataclass, field
from functools import cached_property

from ..utils import generate_id
from ..utils.enums.source import SourcePages, SourceTypes
from ..utils.config import youtube_settings
from ..utils.string_processing import hash_url

from .metadata import Mapping, Metadata
from .parents import OuterProxy
from .collection import Collection



@dataclass
class Source:
    url: str
    page_enum: SourcePages
    referrer_page: SourcePages
    audio_url: Optional[str]

    id: int = field(default_factory=generate_id)
    additional_data: dict = field(default_factory=dict)

    def __post_init__(self):
        self.referrer_page = self.referrer_page or self.page_enum
    
    @cached_property
    def parsed_url(self) -> ParseResult:
        return urlparse(self.url)

    @classmethod
    def match_url(cls, url: str, referrer_page: SourcePages) -> Optional["Source"]:
        """
        this shouldn't be used, unlesse you are not certain what the source is for
        the reason is that it is more inefficient
        """
        parsed = urlparse(url)
        url = parsed.geturl()
        
        if "musify" in parsed.netloc:
            return cls(SourcePages.MUSIFY, url, referrer_page=referrer_page)

        if parsed.netloc in [_url.netloc for _url in youtube_settings['youtube_url']]:
            return cls(SourcePages.YOUTUBE, url, referrer_page=referrer_page)

        if url.startswith("https://www.deezer"):
            return cls(SourcePages.DEEZER, url, referrer_page=referrer_page)
        
        if url.startswith("https://open.spotify.com"):
            return cls(SourcePages.SPOTIFY, url, referrer_page=referrer_page)

        if "bandcamp" in url:
            return cls(SourcePages.BANDCAMP, url, referrer_page=referrer_page)

        if "wikipedia" in parsed.netloc:
            return cls(SourcePages.WIKIPEDIA, url, referrer_page=referrer_page)

        if url.startswith("https://www.metal-archives.com/"):
            return cls(SourcePages.ENCYCLOPAEDIA_METALLUM, url, referrer_page=referrer_page)

        # the less important once
        if url.startswith("https://www.facebook"):
            return cls(SourcePages.FACEBOOK, url, referrer_page=referrer_page)

        if url.startswith("https://www.instagram"):
            return cls(SourcePages.INSTAGRAM, url, referrer_page=referrer_page)

        if url.startswith("https://twitter"):
            return cls(SourcePages.TWITTER, url, referrer_page=referrer_page)

        if url.startswith("https://myspace.com"):
            return cls(SourcePages.MYSPACE, url, referrer_page=referrer_page)

    def get_song_metadata(self) -> Metadata:
        return Metadata({
            Mapping.FILE_WEBPAGE_URL: [self.url],
            Mapping.SOURCE_WEBPAGE_URL: [self.homepage]
        })

    def get_artist_metadata(self) -> Metadata:
        return Metadata({
            Mapping.ARTIST_WEBPAGE_URL: [self.url]
        })

    @property
    def hash_url(self) -> str:
        return hash_url(self.url)

    @property
    def metadata(self) -> Metadata:
        return self.get_song_metadata()

    @property
    def indexing_values(self) -> List[Tuple[str, object]]:
        return [
            ('id', self.id),
            ('url', self.url),
            ('audio_url', self.audio_url),
        ]
        
    def __str__(self):
        return self.__repr__()

    def __repr__(self) -> str:
        return f"Src({self.page_enum.value}: {self.url}, {self.audio_url})"

    @property
    def title_string(self) -> str:
        return self.url

    page_str = property(fget=lambda self: self.page_enum.value)
    type_str = property(fget=lambda self: self.type_enum.value)
    homepage = property(fget=lambda self: SourcePages.get_homepage(self.page_enum))


class SourceCollection:
    _page_to_source_list: Dict[SourcePages, List[Source]]


    def __init__(self, data: Optional[Iterable[Source]] = None, **kwargs):
        self._page_to_source_list = defaultdict(list)

    def get_sources(self, *source_pages: List[Source]) -> Generator[Source]:
        for page in source_pages:
            yield from self._page_to_source_list[page]

    def append(self, source: Source):
        pass

    def extend(self, sources: Iterable[Source]):
        for source in sources:
            self.append(source)
        
    @property
    def source_pages(self) -> Set[SourcePages]:
        return set(source.page_enum for source in self._data)

    def get_sources_from_page(self, source_page: SourcePages) -> List[Source]:
        """
        getting the sources for a specific page like
        YouTube or musify
        """
        return self._page_to_source_list[source_page].copy()