import os

from flask import Flask
from flask import render_template
from flask import request, send_from_directory
from flask_cors import CORS
from flask_httpauth import HTTPBasicAuth
from werkzeug.security import check_password_hash
from werkzeug.utils import redirect

import converter

app = Flask(__name__)
auth = HTTPBasicAuth()
app.config["DEBUG"] = True
CORS(app)

URL_BASE_PATH = "/"

import config_parser

UPLOAD_FODLER = config_parser.upload_path
OUTPUT_FODLER = config_parser.output_path


@auth.verify_password
def verify_password(username, password):
    if username == config_parser.credentials['username'] and \
            check_password_hash(config_parser.credentials['hashedPassword'], password):
        return username


@app.route(URL_BASE_PATH, methods=["GET", "POST"])
@auth.login_required
def upload_image():
    if request.method == "POST":
        if request.files:
            csv_file = request.files["csv"]
            print(csv_file)

            if not valid_csv(csv_file.filename):
                # TODO give some feedback to user
                return redirect(request.url)

            from werkzeug.utils import secure_filename
            filename = secure_filename(csv_file.filename)
            output_file_path = os.path.join(UPLOAD_FODLER, filename)

            if not os.path.exists(UPLOAD_FODLER):
                os.makedirs(UPLOAD_FODLER)

            # TODO save to different path in Porduction!
            csv_file.save(output_file_path)

            # run converter
            if config_parser.prod_mode:
                converter.convert(output_file_path, False)
            else:
                converter.convert(output_file_path, True)

            return render_template("return_result.html")
            # return redirect(request.url)

    return render_template("upload-file.html")


def valid_csv(filename):
    # We only want files with a . in the filename
    if not "." in filename:
        return False

    # Split the extension from the filename
    ext = filename.rsplit(".", 1)[1]
    return ext == 'csv'


def get_marp_url():
    if config_parser.prod_mode:
        return "https://marp.swaghausen.de"
    else:
        return "http://localhost:4100"


@app.route('/marp')
def redirect_to_marp():
    return redirect(get_marp_url(), code=302)
    # return get_marp_url()


@app.route(URL_BASE_PATH + 'download', methods=['GET'])
# @auth.login_required
def download_file():
    """Download the .md file."""
    # print("sending file with name: " + filename)
    current_dir = os.getcwd()
    full_dir = os.path.join(current_dir, OUTPUT_FODLER)
    print("full_dir: " + full_dir)
    return send_from_directory(full_dir, "slide-deck.md", as_attachment=True)


@app.route(URL_BASE_PATH + 'download-pdf', methods=['GET'])
# @auth.login_required
def download_pdf_file():
    """Download the .pdf file."""
    # print("sending file with name: " + filename)
    current_dir = os.getcwd()
    full_dir = os.path.join(current_dir, OUTPUT_FODLER)
    print("full_dir: " + full_dir)
    return send_from_directory(full_dir, "slide-deck.pdf", as_attachment=True)


if __name__ == '__main__':
    flask_options = dict(
        host='0.0.0.0',
        debug=True,
        port=4003,
        threaded=True,
    )
    app.run(**flask_options)