"""This is only a temporary solution. Complete Photos API client is yet to be developed."""

import asyncio
from base64 import b64decode, b64encode
from os import makedirs, path, sep
from random import choice
from typing import Tuple, Union

from requests import get, patch, post
from classes.exceptions import SubmissionUploadError

from modules.logger import logWrite
from modules.utils import configGet


async def authorize() -> str:
    makedirs(configGet("cache", "locations"), exist_ok=True)
    if path.exists(configGet("cache", "locations")+sep+"api_access") is True:
        with open(configGet("cache", "locations")+sep+"api_access", "rb") as file:
            token = b64decode(file.read()).decode("utf-8")
        if get(configGet("address", "posting", "api")+"/users/me/", headers={"Authorization": f"Bearer {token}"}).status_code == 200:
            return token
    payload = {
        "grant_type": "password",
        "scope": "me albums.list albums.read albums.write photos.list photos.read photos.write videos.list videos.read videos.write",
        "username": configGet("username", "posting", "api"),
        "password": configGet("password", "posting", "api")
    }
    response = post(configGet("address", "posting", "api")+"/token", data=payload)
    if response.status_code != 200:
        logWrite(f'Incorrect API credentials! Could not login into "{configGet("address", "posting", "api")}" using login "{configGet("username", "posting", "api")}": HTTP {response.status_code}')
        raise ValueError
    with open(configGet("cache", "locations")+sep+"api_access", "wb") as file:
        file.write(b64encode(response.json()["access_token"].encode("utf-8")))
    return response.json()["access_token"]

async def random_pic(token: Union[str, None] = None) -> Tuple[str, str]:
    """Returns random image id and filename from the queue.

    ### Returns:
        * `Tuple[str, str]`: First value is an ID and the filename in the filesystem to be indexed.
    """    
    token = await authorize() if token is None else token
    logWrite(f'{configGet("address", "posting", "api")}/albums/{configGet("album", "posting", "api")}/photos?q=&page_size=100&caption=queue')
    resp = get(f'{configGet("address", "posting", "api")}/albums/{configGet("album", "posting", "api")}/photos?q=&page_size=100&caption=queue', headers={"Authorization": f"Bearer {token}"})
    if resp.status_code != 200:
        logWrite(f'Could not get photos from album {configGet("album", "posting", "api")}: HTTP {resp.status_code}')
        logWrite(f'Could not get photos from "{configGet("address", "posting", "api")}/albums/{configGet("album", "posting", "api")}/photos?q=&page_size=100&caption=queue" using token "{token}": HTTP {resp.status_code}', debug=True)
        raise ValueError
    if len(resp.json()["results"]) == 0:
        raise KeyError
    pic = choice(resp.json()["results"])
    return pic["id"], pic["filename"]

async def upload_pic(filepath: str, token: Union[str, None] = None) -> Tuple[bool, list]:
    token = await authorize() if token is None else token
    try:
        pic_name = path.basename(filepath)
        files = {'file': (pic_name, open(filepath, 'rb'), 'image/jpeg')}
        response = post(f'{configGet("address", "posting", "api")}/albums/{configGet("album", "posting", "api")}/photos', params={"caption": "queue", "compress": False}, headers={"Authorization": f"Bearer {token}"}, files=files)
        if response.status_code != 200 and response.status_code != 409:
            logWrite(f"Could not upload '{filepath}' to API: HTTP {response.status_code} with message '{response.content}'")
            raise SubmissionUploadError(str(filepath), response.status_code, response.content)
        duplicates = []
        if "duplicates" in response.json():
            for duplicate in response.json()["duplicates"]:
                duplicates.append(f'{configGet("address_external", "posting", "api")}/photos/{duplicate["id"]}')
        return True, duplicates
    except:
        return False, []
    
async def find_pic(name: str, caption: Union[str, None] = None, token: Union[str, None] = None) -> Union[dict, None]:
    token = await authorize() if token is None else token
    try:
        response = get(f'{configGet("address", "posting", "api")}/albums/{configGet("album", "posting", "api")}/photos', params={"q": name, "caption": caption}, headers={"Authorization": f"Bearer {token}"})
        # logWrite(response.json())
        if response.status_code != 200:
            return None
        if len(response.json()["results"]) == 0:
            return None
        return response.json()["results"]
    except Exception as exp:
        logWrite(f"Could not find image with name '{name}' and caption '{caption}' due to: {exp}")
        return None

async def move_pic(id: str, token: Union[str, None] = None) -> bool:
    token = await authorize() if token is None else token
    try:
        patch(f'{configGet("address", "posting", "api")}/photos/{id}?caption=sent', headers={"Authorization": f"Bearer {token}"})
        return True
    except:
        return False

if __name__ == "__main__":
    print(asyncio.run(authorize()))