#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
server_name=$(ynh_app_setting_get --app=$app --key=server_name)
port=$(ynh_app_setting_get --app=$app --key=port)
botname=$(ynh_app_setting_get --app=$app --key=botname)
synapse_instance=$(ynh_app_setting_get --app=$app --key=synapse_instance)
encryption=$(ynh_app_setting_get --app=$app --key=encryption)
botusers=$(ynh_app_setting_get --app=$app --key=botusers)
botadmin=$(ynh_app_setting_get --app=$app --key=botadmin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
previous_mautrix_version=$(ynh_app_setting_get --app=$app --key=mautrix_version)

db_name=$(ynh_app_setting_get --app=$app --key=db_name)
#db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

mautrix_version=$(ynh_app_upstream_version)
signald_user="signald" # This is actually chosen by the signald dependency

#=================================================
# SET CONSTANTS
#=================================================

enable_relaybot=true
# https://docs.python.org/3.6/library/logging.html#logging-levels
log_level="INFO"
#log_format="$app.log"

synapse_db_name="matrix_$synapse_instance"
bot_synapse_db_user="@$botname:$server_name"

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

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=5

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="stop"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=5

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

ynh_install_extra_app_dependencies --repo="http://http.debian.net/debian buster-backports main" --package="libolm-dev" --key="https://keyserver.ubuntu.com/pks/lookup?search=0x0E98404D386FA1D9&op=get"
ynh_install_extra_app_dependencies --repo="https://updates.signald.org unstable main" --package="$extra_dependencies" --key="https://updates.signald.org/apt-signing-key.asc"

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

# Upgrade from >0.2.0
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)

# Upgrade from <=0.2.0
if [ -z "$db_name" ]
then
    db_name=$(ynh_app_setting_get --app=$app --key=$app)
    ynh_app_setting_set --app=$app --key=db_name --value=$db_name
fi
if [ -z "$db_pwd" ]
then
    db_pwd=$(ynh_app_setting_get --app=$app --key=mautrix_bridge_db_pwd)
    ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
fi

# Fix possible permission issues with a previous signald version, esp. with stickers
mkdir -p /var/lib/signald/{avatars,attachments,stickers}
chown $signald_user:$signald_user /var/lib/signald/{avatars,attachments,stickers}
chmod -R g+rwX /var/lib/signald/{avatars,attachments,stickers}

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --groups="$signald_user"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path/src"
	chmod 750 $final_path
	chown $app:$app $final_path
fi

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================
### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different --file="$final_path/config.yaml"
ynh_backup_if_checksum_is_different --file="/etc/matrix-$synapse_instance/app-service/$app.yaml"

#=================================================
# UPDATE CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring Mautrix Bridge..." --weight=2

ynh_add_config --template="../conf/config.yaml" --destination="$final_path/config.yaml"
chmod -R 750 "$final_path"
chown -R $app:$app "$final_path"

#================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=4

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# UPGRADE MAUTRIX-BRIDGE PYTHON MODULE
#=================================================
ynh_script_progression --message="Upgrading python3 virtual environment" --weight=6

mkdir -p /var/log/$app
# Configure Mautrix-Bridge
python3 -m venv $final_path
export HOME=$final_path
$final_path/bin/pip3 install --upgrade pip setuptools wheel

ynh_script_progression --message="Installing with pip" --weight=6

# Pre-compiled python-olm to avoid libolm-dev, python3-dev -> does not work for arm
#$final_path/bin/pip3 install --upgrade python-olm --extra-index-url https://gitlab.matrix.org/api/v4/projects/27/packages/pypi/simple
# Build with libolm3 end-to-bridge encryption
$final_path/bin/pip3 install --upgrade $final_path/src/mautrix-signal.tar.gz[metrics,e2be,formattednumbers,qrlink,stickers]

#=================================================
# REGISTER SYNAPSE APP-SERVICE
#=================================================
$final_path/bin/python3 -m mautrix_signal -g -c $final_path/config.yaml -r /etc/matrix-$synapse_instance/app-service/$app.yaml

/opt/yunohost/matrix-$synapse_instance/update_synapse_for_appservice.sh \
    || ynh_die "Synapse can't restart with the appservice configuration"

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/config.yaml"
ynh_store_file_checksum --file="/etc/matrix-$synapse_instance/app-service/$app.yaml"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

# Use logrotate to manage application logfile(s)
ynh_use_logrotate
chmod -R 600 "/var/log/$app"
chmod 700 "/var/log/$app"
chown -R $app:$app /var/log/$app

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description="Bridging Signal and Matrix messages" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

sleep 2
chown -R $app:$app "$final_path"
ynh_systemd_action --service_name=$app --action="start"

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

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