"""Pocket API code for FreshRSS2Pocket."""

import requests
import os.path


class Pocket:
    """Pocket API helper class."""
    base_api_path = "https://getpocket.com/v3"
    request_token = ""
    access_token = ""

    def __init__(self, consumer_key):
        self.consumer_key = consumer_key

        if not self.access_token_stored():
            self.get_request_token()
            self.authenticate_app()
            self.get_access_tocken()
        else:
            self.read_access_token()

    def post_request(self, path, json):
        res = requests.post(
            f"{self.base_api_path}/{path}",
            headers={"X-Accept": "application/json"},
            json=json,
            timeout=15
        )

        if res.status_code >= 400:
            raise ValueError("Response status codes indicates and error!")

        return res.json()

    def get_request_token(self):
        """Request a request token."""
        json = {
            "consumer_key": self.consumer_key,
            "redirect_uri": "http://localhost"
        }

        data = self.post_request(
            "oauth/request",
            json
        )

        self.request_token = data['code']

    def authenticate_app(self):
        print("Paste the following URL in your browser to authorize freshrss2pocket")
        print(f"https://getpocket.com/auth/authorize?request_token={self.request_token}&redirect_uri=http%3A%2F%2Flocalhost")
        input("Press Enter if done...")

    def get_access_tocken(self):
        json = {
            "consumer_key": self.consumer_key,
            "code": self.request_token
        }

        data = self.post_request(
            "oauth/authorize",
            json
        )

        self.access_token = data['access_token']
        self.write_access_token()

    def access_token_stored(self):
        return os.path.isfile(".pocket_access_token")

    def read_access_token(self):
        with open(".pocket_access_token", "r") as token_file:
            self.access_token = token_file.read().strip()

    def write_access_token(self):
        with open(".pocket_access_token", "w") as token_file:
            token_file.write(self.access_token)

    def add(self, url, title="", tags=""):
        """Add URL to Pocket's save list."""
        json = {
            "consumer_key": self.consumer_key,
            "access_token": self.access_token,
            "url": url
        }

        if title:
            json['title'] = title

        if tags:
            json['tags'] = tags

        self.post_request(
            "add",
            json=json
        )