#!/bin/bash

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

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

#=================================================
# CHECK VERSION
#=================================================
upgrade_type=$(ynh_check_app_version_changed)

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

ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name="$app-consumer" --action="stop" --log_path="/var/log/$app/$app-consumer.log"
ynh_systemd_action --service_name="$app-scheduler" --action="stop" --log_path="/var/log/$app/$app-scheduler.log"
ynh_systemd_action --service_name="$app-task-queue" --action="stop" --log_path="/var/log/$app/$app-task-queue.log"

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

# If ocr_language doesn't exist, create it
if [ -z "$ocr_language" ]; then
	ocr_language="eng"
	ynh_app_setting_set --app=$app --key=ocr_language --value=$ocr_language
fi

if ynh_compare_current_package_version -c le -v "1.14.5~ynh1"
then
	# When upgrading from older version when install_dir was in /var/www,
	# we need to rebuild the venv entierly
	ynh_secure_remove --file="$install_dir/venv"
fi

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

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

	ynh_setup_source --dest_dir="$install_dir" --keep="paperless.conf"
fi

chmod 750 "$install_dir"
chmod -R o-rwx "$install_dir"
chown -R $app:$app "$install_dir"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# INSTALL PYTHON DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing Python dependencies..."

pushd $install_dir
	python3 -m venv venv
	chown -R "$app:" "$install_dir"
(
	source "$install_dir/venv/bin/activate"
	ynh_exec_as $app $install_dir/venv/bin/pip3 install --upgrade pip setuptools wheel
	ynh_exec_as $app $install_dir/venv/bin/pip3 install -r "$install_dir/requirements.txt"

	# Installing NLTK data
	ynh_secure_remove --file="$install_dir/nltk_data"
	mkdir -p "$install_dir/nltk_data"
	chown -R "$app:" "$install_dir/nltk_data"
	ynh_exec_warn_less ynh_exec_as $app $install_dir/venv/bin/python3 -m nltk.downloader -d "$install_dir/nltk_data" snowball_data
	ynh_exec_warn_less ynh_exec_as $app $install_dir/venv/bin/python3 -m nltk.downloader -d "$install_dir/nltk_data" stopwords
	ynh_exec_warn_less ynh_exec_as $app $install_dir/venv/bin/python3 -m nltk.downloader -d "$install_dir/nltk_data" punkt

	deactivate
)
popd

#=================================================
# BUILD GHOSTCRIPT SPECIFIC VERSION
#=================================================
if ! dpkg --compare-versions "$($install_dir/bin/gs --version 2>/dev/null)" ge "10.02.1"
then
    ynh_script_progression --message="Building Ghostscript dependency... (this will take a long time!)"

    ynh_setup_source --dest_dir="$install_dir/ghostscript" --source_id="gs" --full_replace

    pushd $install_dir/ghostscript
        ynh_exec_warn_less ./configure
        ynh_exec_warn_less make
        mv bin/ $install_dir/
    popd

    ynh_secure_remove --file="$install_dir/ghostscript"
    chmod -R o-rwx "$install_dir/bin"
    chown -R $app:$app "$install_dir/bin"
    chmod 550 $install_dir/bin/gs
fi

local_path=$install_dir/bin/:$PATH

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

ynh_add_config --template="paperless.conf.example" --destination="$install_dir/paperless.conf"

chmod 400 "$install_dir/paperless.conf"
chown $app:$app "$install_dir/paperless.conf"

# ImageMagick configuration
mkdir -p "$install_dir/.config/ImageMagick"
ynh_add_config --template="policy.xml" --destination="$install_dir/.config/ImageMagick/policy.xml"
chmod 400 "$install_dir/.config/ImageMagick/policy.xml"
chown -R $app:$app "$install_dir/.config"

#=================================================
# SETUP THE DATABASE
#=================================================
ynh_script_progression --message="Setting up the database..." --weight=1

pushd "$install_dir/src"
(
	source "$install_dir/venv/bin/activate"
	ynh_exec_as $app $install_dir/venv/bin/python manage.py migrate
	deactivate
)
popd

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config --service="$app" --template="systemd.service"
ynh_add_systemd_config --service="$app-consumer" --template="systemd-consumer.service"
ynh_add_systemd_config --service="$app-scheduler" --template="systemd-scheduler.service"
ynh_add_systemd_config --service="$app-task-queue" --template="systemd-task-queue.service"

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

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --logfile="/var/log/$app/$app.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-consumer.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-scheduler.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-task-queue.log"

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

yunohost service add "$app" --log="/var/log/$app/$app.log"
yunohost service add "$app-consumer" --log="/var/log/$app/$app-consumer.log"
yunohost service add "$app-scheduler" --log="/var/log/$app/$app-scheduler.log"
yunohost service add "$app-task-queue" --log="/var/log/$app/$app-task-queue.log"

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

ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name="$app-consumer" --action="start" --log_path="/var/log/$app/$app-consumer.log"
ynh_systemd_action --service_name="$app-scheduler" --action="start" --log_path="/var/log/$app/$app-scheduler.log"
ynh_systemd_action --service_name="$app-task-queue" --action="start" --log_path="/var/log/$app/$app-task-queue.log"

#=================================================
# UPGRADE FAIL2BAN
#=================================================
#ynh_script_progression --message="Reconfiguring Fail2Ban..." --weight=1

# Create a dedicated Fail2Ban config
#ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"

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

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