https://forum.kodi.tv/showthread.php?tid=254502
https://lexigr.am/docs/getting-started.html

1.) An Amazon developer profile is required for custom Alexa skills. Log in with normal amazon account on this page and create a developer account: https://developer.amazon.com/

2.) NodeJS framework v8.11.1 is required. Do not use default ubuntu package of NodeJS as this is is an older version. Installation using NVM https://github.com/nvm-sh/nvm#installation-and-update

wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.34.0/install.sh | bash

close and reopen terminal after installation

3.) Install NodeJS 8.11.1

nvm install 8.11.1
nvm use 8.11.1

4.) Install lexigram-cli

npm install -g lexigram-cli

5.) Use the cli to log in to Amazon and initialise the Alexa skill (Kanzi)

lexigram login --no-browser true
# select default profile and confirm with yes to enter Amazon credentials
# copy url into browser, grant access and paste the resulting Auth key back into terminal

6.) Download an empty config file

lexigram init-config

7.) Initialise the skill kanzi

lexigram init-skill kanzi

8.) Kodi setup

Go to settings → system → Services → Web server and allow remote control

1. via http
2. from applications on this system
3. from applications on other systems

Supply username/password

9.) A reverse caching proxy may be useful to cache search results. This is primarily useful for external access and not for local access, however, even local access may benefit from this.

10.) Adjust configuration file kodi.config with backend/proxy details, local timezone and as required.

vi kodi.config

shutdown = 'quit'
timezone = Europe/London

11.) Set up webserver as target for the alexa command

sudo apt-get install apache2 libapache2-mod-wsgi
sudo a2enmod ssl
sudo systemctl restart apache2
sudo mkdir /etc/apache2/ssl
sudo openssl genrsa -out /etc/apache2/ssl/apache.key 2048
sudo cat > ssl-key-conf.cnf << EOF
[req]
distinguished_name = req_distinguished_name
x509_extensions = v3_req
prompt = no

[req_distinguished_name]
C = GB
ST = .
L = .
O = wuff
CN = kodi-alexa

[v3_req]
keyUsage = keyEncipherment, dataEncipherment
extendedKeyUsage = serverAuth
subjectAltName = @subject_alternate_names

[subject_alternate_names]
DNS.1 = wuff.dyndns.org
EOF

openssl req -new -x509 -days 365 -key /etc/apache2/ssl/apache.key -config ssl-key-conf.cnf -out /etc/apache2/ssl/apache.crt


sudo vi /etc/apache2/apache.conf
# set ServerName example.dyndns.org

sudo vi /etc/apache2/sites-available/default-ssl.conf
# set DocumentRoot /var/www/html
# set SSLCertificateFile /etc/apache2/ssl/apache.crt
# set SSLCertificateKeyFile /etc/apache2/ssl/apache.key
# add WSGIScriptAlias /kodi-alexa /var/www/kodi-alexa/alexa.wsgi
sudo a2ensite default-ssl.conf

sudo apt-get install python-tz
sudo apt-get install python-pip
sudo pip install flask-ask
sudo pip install kodi-voice
sudo pip install python-Levenshtein

sudo systemctl restart apache2

12.) Deploy kanzi

cp -r /home/kodi/kanzi/source/repo /var/www/kodi-alexa
chown -R www-data:www-data /var/www/kodi-alexa

lexigram deploy kanzi

Set invocation name (2 for kodi)
#set skill server to local ip address https://example.dyndns.org/kodi-alexa

possible adjustment required. not sure if external access is absolutely required.

In Alexa Skill Set, Add your IP and service name as the HTTPS URL: https://XXXX.ddns.net/kodi-alexa
Upload x509 certificate file for the endpoint (copy the /etc/apache2/ssl/apache.crt to the local PC or use cat and copy & paste the code into a local text file and upload that text file.

Finally, if you haven't already, you'll have to open your apache server to the Internet with port forwarding. 

13.) To limit requests to your own alexa skill only, use the skill ID and add it to kodi.config
<code>
skill_id = [set to amzn1.ask.skill.xxxxxxx as per url on developer.amazon.com

then re-deploy

lexigram deploy kanzi

npm upgrade -g lexigram-cli
lexigram deploy kanzi