from typing import List, Dict

import FAAPI
import Submission


class User:
    """
    A FurAffinity user.
    """

    _usercache = {}

    def __init__(self, api, username: str):
        self._api = api
        self.username: str = username
        self._gallery: List[Submission.Submission] = None
        self._faves: List[Submission.Submission] = None
        self._watching: List[User] = None
        self._watchers: List[User] = None

    @property
    def username_lower(self) -> str:
        return self.username.lower()

    @property
    def gallery(self) -> List[Submission.Submission]:
        # Get the gallery if we don't have it already
        if not self._gallery:
            self._gallery = self._get_gallery()

        return self._gallery

    @property
    def faves(self) -> List[Submission.Submission]:
        # Get faves if we don't have them already
        if not self._faves:
            self._faves = self._get_faves()

        return self._faves

    @property
    def watching(self):  # -> List[User]:
        # Get the list if we don't have it already
        if not self._watching:
            self._watching = self._get_watching()

        return self._watching

    @property
    def watchers(self):  # -> List[User]:
        # Get the list if we don't have it already
        if not self._watchers:
            self._watchers = self._get_watchers()

        return self._watchers

    @staticmethod
    def new_or_cached(api, username: str):  # -> User:
        if username not in User._usercache:
            User._usercache[username] = User(api, username)

        return User._usercache[username]

    def _get_gallery(self) -> List[Submission.Submission]:
        submissions = []
        next_page_url = '{}/gallery/{}/'.format(FAAPI.FA_BASE_URL, self.username)
        while next_page_url:
            soup = self._api.get_soup(next_page_url)

            # Try get the next page
            try:
                next_page_button = soup.select('.submission-list form button[type=submit]')[0]
                next_page_url = FAAPI.FA_BASE_URL + next_page_button.parent().get('action')
            except:
                # No next page, null the url to break the loop
                next_page_url = None

            # Get all the submissions on this page
            for item in soup.select('.gallery figure'):
                sub = Submission.Submission.new_or_cached(self._api, int(item.get('id')[4:]))  # IDs look like 'sid-35908275', so we just skip the 'sid-'
                submissions.append(sub)

        return submissions

    def _get_faves(self):
        submissions = []
        next_page_url = '{}/favorites/{}/'.format(FAAPI.FA_BASE_URL, self.username)
        while next_page_url:
            soup = self._api.get_soup(next_page_url)

            # Try get the next page
            try:
                next_page_button = soup.select('.pagination a.button:last-child')[0]
                next_page_url = FAAPI.FA_BASE_URL + next_page_button.get('href')
            except:
                # No next page, null the url to break the loop
                next_page_url = None

            # Get all the submissions on this page
            for item in soup.select('.gallery figure'):
                sub = Submission.Submission.new_or_cached(self._api, int(item.get('id')[4:]))  # IDs look like 'sid-35908275', so we just skip the 'sid-'
                submissions.append(sub)

        return submissions

    def _get_watching(self):
        watching = []
        next_page_url = '{}/watchlist/by/{}/'.format(FAAPI.FA_BASE_URL, self.username)
        while True:
            soup = self._api.get_soup(next_page_url)

            # Stop processing if there aren't any users left
            users = soup.select('.watch-list .watch-list-items a')
            if len(users) == 0:
                break

            for item in users:
                watching.append(User.new_or_cached(self._api, item.text.strip()))

            # Try get the next page
            try:
                next_page_button = soup.select('.floatright form button[type=submit]')[0]
                next_page_url = FAAPI.FA_BASE_URL + next_page_button.parent().get('href')
            except:
                # No next page, break out
                break

        return watching

    def _get_watchers(self):
        watchers = []
        next_page_url = '{}/watchlist/to/{}/'.format(FAAPI.FA_BASE_URL, self.username)
        while True:
            soup = self._api.get_soup(next_page_url)

            # Stop processing if there aren't any users left
            users = soup.select('.watch-list .watch-list-items a')
            if len(users) == 0:
                break

            for item in users:
                watchers.append(User.new_or_cached(self._api, item.text.strip()))

            # Try get the next page
            try:
                next_page_button = soup.select('.floatright form button[type=submit]')[0]
                next_page_url = FAAPI.FA_BASE_URL + next_page_button.parent().get('href')
            except:
                # No next page, break out
                break

        return watchers

    def __str__(self):
        return self.username