# Copyright Sage Vaillancourt 2021

import os
import subprocess
import threading
import urllib.parse

from flask import (Blueprint, render_template, request, make_response, session, redirect, jsonify)
from wtforms import Form, StringField, TextAreaField, validators
from email_validator import validate_email, EmailNotValidError

import undercover.db as db
from undercover.pdf_builder import CLData

writing_blueprint = Blueprint('writing', __name__,)


class CLForm(Form):
    username = StringField(
        'Username:',
        [validators.Length(min=4, max=99)],
        default="Sage"
    )
    company = StringField(
        'Company:',
        [validators.Length(min=2, max=99)],
        default="BananaCorp"
    )
    jobAndPronoun = StringField(
        'Job and Pronoun (a/an):',
        [validators.Length(min=4, max=99)],
        default="a banana stocker"
    )
    skillTypes = StringField(
        'Skill Type:',
        [validators.Length(min=2, max=99)],
        default="practical"
    )
    mySkills = StringField(
        'My Skills:',
        [validators.Length(min=2, max=99)],
        default="stocking bananas"
    )

    closingText = TextAreaField(
        'Closing Text:',
        [validators.Length(min=2, max=99)],
        default="I look forward to hearing from you"
    )

    body = TextAreaField(
        'Body:',
        [validators.Length(min=4, max=9999)],
        default=(
            "My name is {\\username}. I'm excited for the opportunity to work as "
            "{\\jobAndPronoun} with your company.  I think my {\\skillTypes} knowledge "
            "of {\\mySkills} could contribute well to your team.\n\n"
    
            "I am passionate about what I do, and I think we would work well together.\n\n"
    
            "Thank you for your consideration."
        )
    )


@writing_blueprint.route('/login', methods=['POST', 'GET'])
def login():
    if request.method == 'POST':
        username = request.form['login']
        if db.login(username, request.form['password']):
            session['username'] = username
            return redirect('/')
        return make_response("", 401)

    return '''
        <form method="post">
            <p><input type=text name=username></p>
            <p><input type=password name=password></p>
            <p><input type=submit value=Login></p>
        </form>
    '''


@writing_blueprint.route('/logout', methods=['POST', 'GET'])
def logout():
    session.pop('username', None)
    return redirect('/')


@writing_blueprint.route('/', methods=['GET'])
def index_get():
    return render_template(
        'writing.jinja2',
        form=CLForm(),
        username=session.get('username')
    )


@writing_blueprint.route('/create_account', methods=['GET'])
def create_account_page():
    return render_template('create_account.jinja2')


@writing_blueprint.route('/create_account', methods=['POST'])
def create_account():
    email = request.form['login']
    try:
        validate_email(email, check_deliverability=True)
    except EmailNotValidError as e:
        form = CLForm(request.form)
        return make_response(render_template('writing.jinja2', form=form, error=str(e)), 401)

    if db.get_user(email):
        return make_response("A user with that email already exists!", 401)

    db.add_user(email, request.form['password'])
    session['username'] = email
    return redirect('/')


@writing_blueprint.route('/dbtest', methods=['GET'])
def db_test_get():
    response = make_response(db.get_user_letters(1)[0].contents, 200)
    response.mimetype = "text/plain"
    return response


@writing_blueprint.route('/update', methods=['POST'])
def update_get():
    expected_token = os.environ['GITLAB_HOOK_TOKEN']
    given_token = request.headers['X-Gitlab-Token']
    event_type = request.headers['X-Gitlab-Event']

    if expected_token == given_token and event_type == "Push Hook":
        print("Update notification received.")
        response = make_response("", 200)
        response.mimetype = "text/plain"
        threading.Timer(5, git_update, []).start()
        return response
    else:
        return make_response("", 404)


def git_update():
    script = os.environ['UPDATE_SCRIPT_PATH']
    if not script:
        return
    subprocess.run(['bash', '-c', "test -f " + script + " && " + script])


@writing_blueprint.route('/', methods=['POST'])
def index_post():
    form = CLForm(request.form)
    if form.validate():
        data = CLData(
            username=form.username.data,
            company=form.company.data,
            jobAndPronoun=form.jobAndPronoun.data,
            skillTypes=form.skillTypes.data,
            mySkills=form.mySkills.data,
            closingText=form.closingText.data,
            body=form.body.data,
        )

        email = session.get('login')
        if email:
            user = db.get_user(email)
            letters = db.get_user_letters(user.id)
            if True:  # len(letters) == 0:
                db.add_letter(user.id, 'LETTER_TITLE', jsonify(data).get_data(True))
            else:
                print("TODO: Add letter editing!")
                # db.edit_letter()

        (resp, errors) = data.generate_pdf()
        if errors:
            resp = make_response(render_template(
                'writing.jinja2',
                form=form,
                letter_errors=errors,
            ))
        # Save entered data as cookies on user's machine
        for pair in data.get_pairs():
            resp.set_cookie(pair[0], urllib.parse.quote(pair[1]))
        return resp

    return render_template(
        'writing.jinja2',
        form=form,
    )