from typing import Dict, List
import requests
import os
import functools
import dotenv
import giteapy
import time
import base64
from werkzeug.datastructures import FileStorage
import yaml

from slugify import slugify

from datetime import datetime
from xml.etree import ElementTree
from flask import Flask, request, url_for, Response
from requests import api
from flask_micropub import MicropubClient

dotenv.load_dotenv()

PERMITTED_DOMAIN = os.environ.get(
    'PERMITTED_DOMAINS', 'https://brainsteam.co.uk/').split(';')

app = Flask(__name__)
app.config['SECRET_KEY'] = 'my super secret key'
micropub = MicropubClient(app, client_id='https://brainsteam.co.uk')


ENTITY_TYPE_PLURAL_MAP = {
    "post": "posts",
    "note": "notes",
    "reply": "replies",
    "bookmark": "bookmarks"
}


def authed_endpoint(f):
    @functools.wraps(f)
    def wrapper(*args, **kwargs):

        authtok = request.headers.get('Authorization')

        if authtok is None:
            return {
                "error": "unauthorized",
                "error_description": "An auth token was not provided"
            }, 401

        auth = requests.get("https://tokens.indieauth.com/token", headers={
                            "Authorization": authtok, "Accept": "application/json"}).json()

        if auth['me'] not in PERMITTED_DOMAIN:
            return {"error": "forbidden", "error_description": f"User {auth['me']} not permitted to post here"}, 403

        return f(*args, *kwargs)

    return wrapper


_api_client = None


def get_api_client():
    global _api_client

    if _api_client is None:
        config = giteapy.Configuration()
        config.host = os.environ.get('GITEA_URL')
        config.api_key['access_token'] = os.environ.get('GITEA_API_KEY')
        _api_client = giteapy.RepositoryApi(giteapy.ApiClient(config))

    return _api_client

def process_photo_url(now: datetime, doc: Dict[str, List[str]], suffix: str = ""):
    """Process photo submitted via URL"""

    now_ts = int(time.mktime(now.timetuple()))

    if os.environ.get('MICROPUB_IMAGE_STRATEGY') == 'copy':
        # download the photo
        r = requests.get(doc['photo'])

        ext = os.path.splitext(doc['photo'])[1]

        # generate local filename
        filename = os.path.join(os.environ.get(
            'MICROPUB_MEDIA_PATH'), now.strftime("%Y/%m/%d"), str(now_ts) + f"{now_ts}_{suffix}{ext}")
        photo_url = os.path.join(os.environ.get(
            'MICROPUB_MEDIA_URL_PREFIX'), now.strftime("%Y/%m/%d"), str(now_ts) + f"{now_ts}_{suffix}{ext}")

        # make directory if needed
        if not os.path.exists(os.path.dirname(filename)):
            os.makedirs(os.path.dirname(filename))

        with open(filename, 'wb') as f:
            f.write(r.content)

    # elif os.environ.get('MICROPUB_IMAGE_STRATEGY') == 'gitea':

    else:
        photo_url = doc['photo']

    return photo_url

def process_photo_upload(now: datetime, file: FileStorage, suffix: str=""):
    """Process photo directly uploaded to micropub"""

    now_ts = int(time.mktime(now.timetuple()))

    if os.environ.get('MICROPUB_IMAGE_STRATEGY') == 'copy':

        ext = os.path.splitext(file.filename)[1]

        # generate local filename
        filename = os.path.join(os.environ.get(
            'MICROPUB_MEDIA_PATH'), now.strftime("%Y/%m/%d"), f"{now_ts}_{suffix}{ext}")
        photo_url = os.path.join(os.environ.get(
            'MICROPUB_MEDIA_URL_PREFIX'), now.strftime("%Y/%m/%d"),  f"{now_ts}_{suffix}{ext}")

        # make directory if needed
        if not os.path.exists(os.path.dirname(filename)):
            os.makedirs(os.path.dirname(filename))

        file.save(filename)

        return photo_url

    else:
        return None



@app.route('/', methods=['POST'])
@authed_endpoint
def req():

    doc = request.form.to_dict(flat=True)


    if 'in-reply-to' in doc:
        entry_type = "reply"

    elif 'bookmark-of' in doc:
        entry_type = "bookmark"
    elif 'repost-of' in doc:
        entry_type = "repost"
    elif 'like-of' in doc:
        entry_type = "like"


    # elif ('photo' in doc) or ('photo' in request.files) or ('photo[]' in request.files):
    #     entry_type = "photo"

    elif 'name' in doc:
        entry_type = "post"
    else:
        entry_type = "note"

    now = datetime.now()
    now_ts = int(time.mktime(now.timetuple()))

    url = os.path.join("/", ENTITY_TYPE_PLURAL_MAP.get(entry_type, entry_type + "s"),
                       now.strftime("%Y/%m/%d"), str(now_ts))

    if 'name' in doc:
        slug = slugify(doc['name']) + str(now_ts)
    else:
        slug = str(now_ts)

    file_path = os.path.join(os.environ.get(
        'CONTENT_PREFIX'), ENTITY_TYPE_PLURAL_MAP.get(entry_type, entry_type + "s"),  now.strftime("%Y/%m/%d"), slug + ".md")

    frontmatter = {
        "url": url,
        "type": entry_type,
        "date": now.isoformat(sep='T'),
    }

    for key in ['bookmark-of', 'in-reply-to', 'repost-of', 'like-of']:
        if key in doc:
            frontmatter[key] = doc[key]

    if 'category' in doc:
        categories = [doc['category']]
    else:
        categories = request.form.getlist('category[]')

    if 'name' in doc:
        frontmatter['title'] = doc['name']

    if len(categories) > 0:
        frontmatter['tags'] = categories

    frontmatter_str = yaml.dump(frontmatter)

    if ('photo' in doc) or ('photo' in request.files) or ('photo[]' in request.files):

        if 'photo[]' in request.files:
            photos = request.files.getlist('photo[]')

            docstr = ""

            for i, photo in enumerate(photos):
                photo_url = process_photo_upload(now, photo, suffix=i)

                docstr += f"\n\n![image]({photo_url})"

            docstr += f"\n\n {doc['content']}"

        else:

            if 'photo' in doc:
                photo_url = process_photo_url(now, doc)
            else:
                photo_url = process_photo_upload(now, request.files['photo'])


            docstr = f"![image]({photo_url}) \n\n {doc['content']}"
    else:
        docstr = doc['content']

    content = base64.encodestring(
        f"---\n{frontmatter_str}\n---\n\n{docstr}".encode("utf8")).decode("utf8")

    api = get_api_client()

    body = giteapy.CreateFileOptions(content=content)

    try:
        r = api.repo_create_file(os.environ.get(
            'GITEA_REPO_OWNER'), os.environ.get('GITEA_REPO_NAME'), file_path, body)

        return Response(status=202, headers={"Location": url})

    except Exception as e:
        return {"error": str(e)}, 500



def parse_categories():

  strategy = os.environ.get('MICROPUB_CATEGORY_LIST_STRATEGY')

  if strategy == 'feed':
    tree = ElementTree.parse(os.environ.get('MICROPUB_CATEGORY_LIST_FILE'))
    tags = tree.findall('.//item/title')


  return {"categories": [tag.text for tag in tags] }


def generate_config_json():

    return {
        "media-endpoint": request.base_url + "media",
        "syndicate-to": [
            {
                "uid": "mastodon",
                "name": "Mastodon"
            }
        ],
        "post-types": [
            {
                "type": "note",
                        "name": "Note"
            },
            {
                "type": "article",
                        "name": "Blog Post"
            },
            {
                "type": "photo",
                        "name": "Photo"
            },
            {
                "type": "reply",
                        "name": "Reply"
            },
            {
                "type": "bookmark",
                        "name": "Bookmark"
            }
        ]
    }


@app.route("/", methods=['GET'])
@authed_endpoint
def index():

    if request.args.get('q') == 'config':
        return generate_config_json()

    elif request.args.get('q') == 'category':
        return parse_categories()


@app.route('/form', methods=['GET'])
def authform():
    return """
    <!DOCTYPE html>
    <html>
      <body>
        <form action="/authenticate" method="GET">
          <input type="text" name="me" placeholder="your domain.com"/>
          <button type="submit">Authenticate</button>
        </form>
        <form action="/authorize" method="GET">
          <input type="text" name="me" placeholder="your domain.com"/>
          <select name="scope">
            <option>read</option>
            <option>post</option>
            <option>comment</option>
          </select>
          <button type="submit">Authorize</button>
        </form>
      </body>
    </html>
    """


@app.route('/authenticate')
def authenticate():
    return micropub.authenticate(
        request.args.get('me'), next_url=url_for('index'))


@app.route('/authorize')
def authorize():
    return micropub.authorize(
        request.args.get('me'), next_url=url_for('index'),
        scope=request.args.get('scope'))


@app.route('/indieauth-callback')
@micropub.authenticated_handler
def indieauth_callback(resp):
    return """
    <!DOCTYPE html>
    <html>
      <body>
        Authenticated:
        <ul>
          <li>me: {}</li>
          <li>next: {}</li>
          <li>error: {}</li>
        </ul>
      </body>
    </html>
    """.format(resp.me, resp.next_url, resp.error)


@app.route('/micropub-callback')
@micropub.authorized_handler
def micropub_callback(resp):

    return """
    <!DOCTYPE html>
    <html>
      <body>
        Authorized:
        <ul>
          <li>me: {}</li>
          <li>endpoint: {}</li>
          <li>token: {}</li>
          <li>next: {}</li>
          <li>error: {}</li>
        </ul>
      </body>
    </html>
    """.format(resp.me, resp.micropub_endpoint, resp.access_token,
               resp.next_url, resp.error)


if __name__ == '__main__':
    app.run(debug=True)