#!/bin/bash

#=================================================
# GENERIC START
#=================================================

# IMPORT GENERIC HELPERS
source /usr/share/yunohost/helpers

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

# Import common cmd
source ./experimental_helper.sh
source ./_common.sh

ynh_script_progression --message="Loading installation settings..."

# RETRIEVE ARGUMENTS
old_domain=$YNH_APP_OLD_DOMAIN
domain=$YNH_APP_NEW_DOMAIN
path_url=$(ynh_normalize_url_path --path_url $YNH_APP_NEW_PATH)
app=$YNH_APP_INSTANCE_NAME

server_name=$(ynh_app_setting_get --app=$app --key=server_name)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
synapse_old_version=$(ynh_app_setting_get --app=$app --key=synapse_version)
jitsi_server=$(ynh_app_setting_get --app=$app --key=jitsi_server)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
port=$(ynh_app_setting_get --app=$app --key=synapse_port)
synapse_tls_port=$(ynh_app_setting_get --app=$app --key=synapse_tls_port)
turnserver_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_tls_port)
turnserver_alt_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_alt_tls_port)
cli_port=$(ynh_app_setting_get --app=$app --key=cli_port)
report_stats=$(ynh_app_setting_get --app=$app --key=report_stats)
allow_public_rooms=$(ynh_app_setting_get --app=$app --key=allow_public_rooms)
e2e_enabled_by_default=$(ynh_app_setting_get --app=$app --key=e2e_enabled_by_default)
ynh_print_OFF
synapse_db_pwd=$(ynh_app_setting_get --app=$app --key=synapse_db_pwd)
turnserver_pwd=$(ynh_app_setting_get --app=$app --key=turnserver_pwd)
registration_shared_secret=$(ynh_app_setting_get --app=$app --key=registration_shared_secret)
form_secret=$(ynh_app_setting_get --app=$app --key=form_secret)
macaroon_secret_key=$(ynh_app_setting_get --app=$app --key=macaroon_secret_key)
ynh_print_ON

synapse_user="matrix-$app"
synapse_db_name="matrix_$app"
synapse_db_user="matrix_$app"
synapse_db_name="matrix_$app"
upstream_version=$(ynh_app_upstream_version)

# Check if the new path stay /_matrix if not exit

if [[ $path_url != "/_matrix" ]]
then
    ynh_die --message "You can't use an other path than '/_matrix'. You can only change the domain."
fi

# We stop the service before to set ynh_clean_setup
ynh_systemd_action --service_name=matrix-$app.service --action=stop

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# NGINX CONFIGURATION
#=================================================

ynh_script_progression --message="Updating nginx configuration..."

# MODIFY URL IN NGINX CONF
nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf

# Change the domain for nginx
# Delete file checksum for the old conf file location
ynh_delete_file_checksum --file "$nginx_conf_path"
mv $nginx_conf_path /etc/nginx/conf.d/$domain.d/$app.conf
# Store file checksum for the new config file location
ynh_store_file_checksum --file "/etc/nginx/conf.d/$domain.d/$app.conf"

# Create .well-known redirection for access by federation
if yunohost --output-as plain domain list | grep -q "^$server_name$"
then
    ynh_add_config --template="server_name.conf" --destination="/etc/nginx/conf.d/${server_name}.d/${app}_server_name.conf"
fi

#=================================================
# UPDATE SYNAPSE CONFIG
#=================================================

ynh_script_progression --message="Updating synapse config..." --weight=2

# WARNING : theses command are used in INSTALL, UPGRADE, CONFIG, CHANGE-URL (4 times)
# For any update do it in all files

if [ -z $macaroon_secret_key ]; then
    # Well, in this package this value was not managed because it was not needed, synapse is able to generate this with some other secret in the config file but after some vulnerability was found with this practice.
    # For more detail about this issue you can see : https://matrix.org/blog/2019/01/15/further-details-on-critical-security-update-in-synapse-affecting-all-versions-prior-to-0-34-1-cve-2019-5885/
    # The problem is that we can't just say generate a new value if the package has not already defined a value. The reason is that changing this value logout all user. And in case of a user has enabled the encryption, the user might lost all conversation !!
    # So for the old install we just leave this as it is. And for the new install we use a real macaroon.
    macaroon_secret_key_param='# macaroon_secret_key: ""'
else
    macaroon_secret_key_param='macaroon_secret_key: "'$macaroon_secret_key'"'
fi

if [ $is_public -eq 0 ]
then
    allowed_access=False
    sso_enabled=True
else
    allowed_access=True
    sso_enabled=False
fi

ynh_add_config --template="homeserver.yaml" --destination="/etc/matrix-$app/homeserver.yaml"
ynh_add_config --template="log.yaml" --destination="/etc/matrix-$app/log.yaml"

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Only setting permissions for the two config files updated above
chown $synapse_user:root -R /etc/matrix-$app
chmod u=rwX,g=rX,o= -R /etc/matrix-$app

#=================================================
# RELOAD SERVICES
#=================================================
ynh_script_progression --message="Restarting synapse services..." --weight=5

ynh_systemd_action --service_name=coturn-$app.service --action=restart
ynh_systemd_action --service_name=matrix-$app --action=restart --line_match="Synapse now listening on TCP port $synapse_tls_port" --log_path="/var/log/matrix-$app/homeserver.log" --timeout=300

ynh_script_progression --message="Change of URL completed for $app" --last