#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source experimental_helper.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=3

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=special_domain)
server_name=$(ynh_app_setting_get --app=$app --key=server_name)
path_url=$(ynh_app_setting_get --app=$app --key=special_path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
synapse_old_version=$(ynh_app_setting_get --app=$app --key=synapse_version)
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)
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)
ynh_print_ON

#=================================================
# SET ALL CONSTANT
#=================================================

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

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# Following the discussion here https://github.com/YunoHost-Apps/synapse_ynh/pull/51 we decided to remove definitely the support of the old package migration.
if [ -z "$synapse_old_version" ]
then
	ynh_die --message="Update from this synapse version is not available. You need to remove this package and reinstall the new package version."
fi

if [ -z $server_name ]; then
   server_name=$domain
   ynh_app_setting_set $app server_name  $domain
fi
#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=30

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

# Backup the current version of the app
if [ "$(ynh_app_setting_get --app=$app --key=disable_backup_before_upgrade)" != '1' ]
then
    ynh_backup_before_upgrade
    ynh_clean_setup () {
        # Clean installation remainings that are not handled by the remove script.
        ynh_clean_check_starting

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=6

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE
# For any update do it in all files
ynh_install_app_dependencies $dependances

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=6

	# Install/upgrade synapse in virtualenv

	# Clean venv is it was on python2.7
	test -e $final_path/bin/python3 || ynh_secure_remove --file=$final_path

	# WARNING : these commands are used in INSTALL, UPGRADE
	# For any update do it in all files

	if [ -n "$(uname -m | grep arm)" ]
	then
		ynh_setup_source --dest_dir=$final_path/ --source_id="armv7_$(lsb_release --codename --short)"
	else
		# Install virtualenv if it don't exist
		test -e $final_path/bin/python3 || python3 -m venv $final_path

		# Install synapse in virtualenv
		cp ../conf/virtualenv_activate $final_path/bin/activate
		ynh_replace_string --match_string=__FINAL_PATH__ --replace_string=$final_path --target_file=$final_path/bin/activate

		# We set all necessary environement variable to create a python virtualenvironnement.
		source $final_path/bin/activate
		pip3 install --upgrade setuptools wheel
		pip3 install --upgrade cffi ndg-httpsclient psycopg2 lxml jinja2
		pip3 install --upgrade matrix-synapse==$upstream_version matrix-synapse-ldap3

		# This function was defined when we called "source $final_path/bin/activate". With this function we undo what "$final_path/bin/activate" does
		deactivate
	fi
fi

#=================================================
# MIGRATION 1 : GENERATE SYNAPSE SECRET
#=================================================

ynh_print_OFF
if [ -z "$registration_shared_secret" ]
then
    ynh_print_ON
    ynh_script_progression --message="Generating synapse secret..." --weight=1

    # Go in virtualenvironnement
    PS1=${PS1:-}
    source $final_path/bin/activate

    # Generate config and keys
    python -m synapse.app.homeserver --keys-directory /etc/matrix-$app/ --generate-config --generate-keys --server-name $server_name --report-stats=no -c homeserver.yml

    # This function was defined when we called "source $final_path/bin/activate". With this function we undo what "$final_path/bin/activate" does
    deactivate

    # Get random values from config
    ynh_print_OFF
    registration_shared_secret=$(egrep "^registration_shared_secret" homeserver.yml | cut -d'"' -f2)
    form_secret=$(egrep "^form_secret" homeserver.yml | cut -d'"' -f1)

    # store in yunohost settings
    ynh_app_setting_set --app=$app --key=registration_shared_secret --value="$registration_shared_secret"
    ynh_app_setting_set --app=$app --key=form_secret --value="$form_secret"
    ynh_print_ON
fi
ynh_print_ON

#=================================================
# UPDATE SYNAPSE CONFIG
#=================================================
ynh_script_progression --message="Updating synapse config..." --weight=2

# WARNING : theses command are used in INSTALL, UPGRADE, CONFIG
# For any update do it in all files

homeserver_config_path="/etc/matrix-$app/homeserver.yaml"

ynh_backup_if_checksum_is_different --file="$homeserver_config_path"
ynh_backup_if_checksum_is_different --file=/etc/matrix-$app/log.yaml

cp ../conf/homeserver.yaml "$homeserver_config_path"
cp ../conf/log.yaml /etc/matrix-$app/log.yaml

ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__DOMAIN__ --replace_string=$domain --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__SERVER_NAME__ --replace_string=$server_name --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__SYNAPSE_DB_USER__ --replace_string=$synapse_db_user --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__PORT__ --replace_string=$port --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__TLS_PORT__ --replace_string=$synapse_tls_port --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__TURNSERVER_TLS_PORT__ --replace_string=$turnserver_tls_port --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__REPORT_STATS__ --replace_string="$report_stats" --target_file="$homeserver_config_path"
ynh_print_OFF
ynh_replace_string --match_string=__SYNAPSE_DB_PWD__ --replace_string=$synapse_db_pwd --target_file="$homeserver_config_path"
ynh_replace_special_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$homeserver_config_path"
ynh_replace_special_string --match_string=__REGISTRATION_SECRET__ --replace_string="$registration_shared_secret" --target_file="$homeserver_config_path"
ynh_replace_string --match_string=__FORM_SECRET__ --replace_string="$form_secret" --target_file="$homeserver_config_path"
ynh_print_ON

ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="/etc/matrix-$app/log.yaml"

if [ "$is_public" = "0" ]
then
    ynh_replace_string --match_string=__ALLOWED_ACCESS__ --replace_string=False --target_file="$homeserver_config_path"
else
    ynh_replace_string --match_string=__ALLOWED_ACCESS__ --replace_string=True --target_file="$homeserver_config_path"
fi

ynh_store_file_checksum --file="$homeserver_config_path"
ynh_store_file_checksum --file="/etc/matrix-$app/log.yaml"

#=================================================
# MIGRATION 2 : MULTINSTANCE SUPPORT
#=================================================

if [ ! -e /etc/matrix-$app/coturn.conf ]
then
    ynh_script_progression --message="Creating an independant service for coturn..." --weight=1

    #=================================================
    # CREATE AN INDEPENDANT SERVICE FOR COTURN
    #=================================================

    # Disable default config for turnserver and create a new service
    systemctl stop coturn.service

    # Set by default the system config for coturn
    echo "" > /etc/turnserver.conf
    ynh_replace_string --match_string="TURNSERVER_ENABLED=1" --replace_string="TURNSERVER_ENABLED=0" --target_file=/etc/default/coturn

    # Set a port for each service in turnserver
    turnserver_alt_tls_port=$(ynh_find_port --port=$((turnserver_tls_port+1)))
    cli_port=$(ynh_find_port --port=5766)

    ynh_app_setting_set --app=$app --key=turnserver_alt_tls_port --value=$turnserver_alt_tls_port
    ynh_app_setting_set --app=$app --key=cli_port --value=$cli_port

    yunohost firewall allow Both $turnserver_alt_tls_port > /dev/null 2>&1

    #=================================================
    # MAKE A CLEAN LOGROTATE CONFIG
    #=================================================

    ynh_use_logrotate --logfile /var/log/matrix-$app --non-append
fi

#=================================================
# MIGRATION 3 : USE STANDARD ACCESS FOR CERTIFCATE
#=================================================

# Fix issue about certificates access
if [ ! $(grep "ssl-cert:x:[0-9]*:.*matrix-$app" /etc/group) ]
then
    ynh_script_progression --message="Use standard access for certificate..." --weight=1

    adduser $synapse_user ssl-cert
    adduser turnserver ssl-cert
fi

#=================================================
# MIGRATION 4 : CREATE A DH FILE
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE
# For any update do it in all files

# Make dh cert for synapse if it doesn't exist
if [ ! -e /etc/ssl/private/dh2048.pem ]
then
    ynh_script_progression --message="Creating a dh file..." --weight=1

    openssl dhparam -out /etc/ssl/private/dh2048.pem -outform PEM -2 2048 -dsaparam 2> /dev/null
    chown root:ssl-cert /etc/ssl/private/dh2048.pem
    chmod 640 /etc/ssl/private/dh2048.pem
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..." --weight=2

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE COTURN CONFIG
#=================================================
ynh_script_progression --message="Updating coturn config..." --weight=1

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

coturn_config_path="/etc/matrix-$app/coturn.conf"

cp ../conf/turnserver.conf "$coturn_config_path"

ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$coturn_config_path"
ynh_replace_string --match_string=__DOMAIN__ --replace_string=$domain --target_file="$coturn_config_path"
ynh_replace_string --match_string=__TLS_PORT__ --replace_string=$turnserver_tls_port --target_file="$coturn_config_path"
ynh_replace_string --match_string=__TLS_ALT_PORT__ --replace_string=$turnserver_alt_tls_port --target_file="$coturn_config_path"
ynh_replace_string --match_string=__CLI_PORT__ --replace_string=$cli_port --target_file="$coturn_config_path"
ynh_print_OFF
ynh_replace_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$coturn_config_path"
ynh_print_ON

# Get public IP and set as external IP for coturn
# note : '|| true' is used to ignore the errors if we can't get the public ipv4 or ipv6
public_ip4="$(curl ip.yunohost.org)" || true
public_ip6="$(curl ipv6.yunohost.org)" || true

if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
then
    ynh_replace_string --match_string='__IPV4__' --replace_string="$public_ip4" --target_file="$coturn_config_path"
else
    ynh_replace_string --match_string='__IPV4__,' --replace_string="" --target_file="$coturn_config_path"
fi

if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
then
    ynh_replace_string --match_string='__IPV6__' --replace_string="$public_ip6" --target_file="$coturn_config_path"
else
    ynh_replace_string --match_string=',__IPV6__' --replace_string="" --target_file="$coturn_config_path"
fi

ynh_store_file_checksum --file="$coturn_config_path"

#=================================================
# ADD SCRIPT FOR COTURN CRON
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

cp ../sources/Coturn_config_rotate.sh $final_path/
ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/Coturn_config_rotate.sh"

#=================================================
# UPDATE SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=3

# Create systemd service for synapse and turnserver
cp ../conf/default_matrix-synapse /etc/default/matrix-$app
ynh_add_systemd_config --service=matrix-$app --template=matrix-synapse.service

cp ../conf/default_coturn /etc/default/coturn-$app
ynh_add_systemd_config --service=coturn-$app --template=coturn-synapse.service

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring fail2ban..." --weight=8

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

ynh_add_fail2ban_config --use_template

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE
# For any update do it in all files
chown $synapse_user:root -R $final_path
chmod 770 $final_path/Coturn_config_rotate.sh
chown $synapse_user:root -R /var/lib/matrix-$app
chown $synapse_user:root -R /var/log/matrix-$app
chown $synapse_user:root -R /etc/matrix-$app
chmod u=rwX,g=rX,o= -R /etc/matrix-$app
chmod 600 /etc/matrix-$app/$server_name.signing.key
setfacl -R -m user:turnserver:rX  /etc/matrix-$app
setfacl -R -m user:turnserver:rwX  /var/log/matrix-$app

#=================================================
# UPDATE VERSION SETTINGS
#=================================================

ynh_app_setting_set --app=$app --key=synapse_version --value=$upstream_version

#=================================================
# 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

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --last