#!/bin/bash

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

source /usr/share/yunohost/helpers

# Stop script if errors
ynh_abort_if_errors

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

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

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

#=================================================
# LOAD SETTINGS
#=================================================

domain=$(ynh_app_setting_get $app special_domain)
path_url=$(ynh_app_setting_get $app special_path)
final_path=$(ynh_app_setting_get $app final_path)
synapse_old_version=$(ynh_app_setting_get $app synapse_version)
synapse_db_pwd=$(ynh_app_setting_get $app synapse_db_pwd)
is_public=$(ynh_app_setting_get $app is_public)
port=$(ynh_app_setting_get $app synapse_port)
synapse_tls_port=$(ynh_app_setting_get $app synapse_tls_port)
turnserver_tls_port=$(ynh_app_setting_get $app turnserver_tls_port)
turnserver_alt_tls_port=$(ynh_app_setting_get $app turnserver_alt_tls_port)
turnserver_pwd=$(ynh_app_setting_get $app turnserver_pwd)
cli_port=$(ynh_app_setting_get $app cli_port)
registration_shared_secret=$(ynh_app_setting_get $app registration_shared_secret)
form_secret=$(ynh_app_setting_get $app form_secret)
report_stats=$(ynh_app_setting_get $app report_stats)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================

# 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 "Update from this synapse version is not available. You need to remove this package and reinstall the new package version."
fi

#=================================================
# BACKUP BEFORE UPGRADE
#=================================================

# We stop the service before to set ynh_clean_setup
systemctl stop matrix-$app.service

# Backup the current version of the app
if [[ $(ynh_app_setting_get $app disable_backup_before_upgrade) != '1' ]]
then
    ynh_backup_before_upgrade
    ynh_clean_setup () {
        ynh_restore_upgradebackup
    }
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# INSTALL DEPENDENCIES
#=================================================

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

# Install/upgrade synapse in virtualenv

# Clean venv is it was on python2.7
test -e $final_path/bin/python3 || ynh_secure_remove $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 $final_path/ "armv7_$(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 __FINAL_PATH__ $final_path $final_path/bin/activate

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

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

if [[ -z "$registration_shared_secret" ]]
then
    # Go in virtualenvironnement
    PS1=${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 $domain --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
    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 $app registration_shared_secret "$registration_shared_secret"
    ynh_app_setting_set $app form_secret "$form_secret"
fi

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

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

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

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

ynh_replace_string __APP__ $app "$homeserver_config_path"
ynh_replace_string __DOMAIN__ $domain "$homeserver_config_path"
ynh_replace_string __SYNAPSE_DB_USER__ $synapse_db_user "$homeserver_config_path"
ynh_replace_string __SYNAPSE_DB_PWD__ $synapse_db_pwd "$homeserver_config_path"
ynh_replace_string __PORT__ $port "$homeserver_config_path"
ynh_replace_string __TLS_PORT__ $synapse_tls_port "$homeserver_config_path"
ynh_replace_string __TURNSERVER_TLS_PORT__ $turnserver_tls_port "$homeserver_config_path"
ynh_replace_special_string __TURNPWD__ $turnserver_pwd "$homeserver_config_path"
ynh_replace_special_string __REGISTRATION_SECRET__ "$registration_shared_secret" "$homeserver_config_path"
ynh_replace_string __FORM_SECRET__ "$form_secret" "$homeserver_config_path"
ynh_replace_string __REPORT_STATS__ "$report_stats" "$homeserver_config_path"

ynh_replace_string __APP__ $app "/etc/matrix-$app/log.yaml"

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

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

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

if [[ ! -e /etc/matrix-$app/coturn.conf ]]
then

    #=================================================
    # 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 "TURNSERVER_ENABLED=1" "TURNSERVER_ENABLED=0" /etc/default/coturn

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

    ynh_app_setting_set $app turnserver_alt_tls_port $turnserver_alt_tls_port
    ynh_app_setting_set $app cli_port $cli_port

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

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

    ynh_use_logrotate /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
    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
    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_add_nginx_config

#=================================================
# UPDATE COTURN CONFIG
#=================================================

# 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 __APP__ $app "$coturn_config_path"
ynh_replace_string __TURNPWD__ $turnserver_pwd "$coturn_config_path"
ynh_replace_string __DOMAIN__ $domain "$coturn_config_path"
ynh_replace_string __TLS_PORT__ $turnserver_tls_port "$coturn_config_path"
ynh_replace_string __TLS_ALT_PORT__ $turnserver_alt_tls_port "$coturn_config_path"
ynh_replace_string __CLI_PORT__ $cli_port "$coturn_config_path"

# 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 "$public_ip4" ]] && ynh_validate_ip4 "$public_ip4"
then
    ynh_replace_string '__IPV4__' "$public_ip4" "$coturn_config_path"
else
    ynh_replace_string '__IPV4__,' "" "$coturn_config_path"
fi

if [[ -n "$public_ip6" ]] && ynh_validate_ip6 "$public_ip6"
then
    ynh_replace_string '__IPV6__' "$public_ip6" "$coturn_config_path"
else
    ynh_replace_string ',__IPV6__' "" "$coturn_config_path"
fi

ynh_store_file_checksum "$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 __APP__ $app "$final_path/Coturn_config_rotate.sh"

#=================================================
# UPDATE SYSTEMD
#=================================================

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

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

#=================================================
# 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/$domain.signing.key
setfacl -R -m user:turnserver:rX  /etc/matrix-$app
setfacl -R -m user:turnserver:rwX  /var/log/matrix-$app

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

ynh_app_setting_set $app synapse_version $upstream_version

#=================================================
# RELOAD SERVICES
#=================================================

systemctl restart coturn-$app.service
ynh_check_starting "Synapse now listening on port $synapse_tls_port" "/var/log/matrix-$app/homeserver.log" 300 "matrix-$app"