#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================
source _common.sh
source /usr/share/yunohost/helpers

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

app=$YNH_APP_INSTANCE_NAME

path_url=$(ynh_app_setting_get "$app" path)
is_public=$(ynh_app_setting_get "$app" is_public)
final_path=$(ynh_app_setting_get "$app" final_path)
db_name=$(ynh_app_setting_get "$app" db_name)
domain=$(ynh_app_setting_get "$app" domain)
db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
admin=$(ynh_app_setting_get "$app" admin)
admin_mail=$(ynh_user_get_info "$admin" mail)
memc_port=$(ynh_app_setting_get "$app" memc_port)
github_account=$(ynh_app_setting_get "$app" github_account)
migration311=$(ynh_app_setting_get "$app" migration311)
key=$(ynh_string_random 24)$(ynh_string_random 24)$(ynh_string_random 2)
redis_db=$(ynh_app_setting_get "$app" redis_db)

#=================================================
# Get previous version number
#=================================================
ynh_script_progression --message="Get previous version number..."

(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	pip install --upgrade pip
	pip freeze --local > freeze.pip
)
previous_version=$(cat freeze.pip | grep "Weblate==" | sed "s|Weblate==||")

ynh_secure_remove freeze.pip

previous_version_template="../conf/settings_history/settings.$previous_version.py"
test -e "$previous_version_template" || ynh_die "Previous version unknown: $previous_version"

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

# 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

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

if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set "$app" is_public 1	# Fix is_public as a boolean value
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set "$app" is_public 0
	is_public=0
fi

if [[ -d "$final_path/bin/" ]]
then
	ynh_secure_remove "$final_path/bin/"
fi

# (<3.8) log cleanups
if [[ -e "/var/log/uwsgi/app/$app" ]]
then
    ynh_systemd_action --service_name="$app" --action="stop"
    ynh_systemd_action --service_name="$app-celery" --action="stop"
	ynh_secure_remove "/var/log/uwsgi/app/$app"
	ynh_secure_remove "/var/log/$app-celery"
fi

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path "$path_url")

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================

ynh_script_progression --message="Stopping systemd services..."

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

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

# Create a dedicated nginx config
ynh_add_nginx_config

if [ "$path_url" == "/" ]
then
	# $finalnginxconf comes from ynh_add_nginx_config
	ynh_replace_string "location //"      "location /"        "$finalnginxconf"

	# ynh panel is only comptable with non-root installation
	ynh_replace_string "	include conf.d/"  "	#include conf.d/"  "$finalnginxconf"

	ynh_store_file_checksum "$finalnginxconf"
fi

#=================================================
# SPECIFIC UPGRADE
#=================================================
# Update dependencies
#=================================================

ynh_install_app_dependencies "$pkg_dependencies"

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

# Create a system user
ynh_system_user_create "$app" "$final_path"
chsh --shell /bin/bash "$app"

#=================================================
# SPECIFIC SETUP uwsgi
#=================================================
ynh_script_progression --message="Configure uwsgi..."

finaluwsgiini="/etc/uwsgi/apps-available/$app.ini"
cp ../conf/uwsgi.ini "$finaluwsgiini"

ynh_replace_string "__FINALPATH__"  "$final_path"     "$finaluwsgiini"
ynh_replace_string "__PATH__"       "$path_url"       "$finaluwsgiini"
ynh_replace_string "__APP__"        "$app"            "$finaluwsgiini"
ynh_replace_string "__PYTHONPATH__" "$weblate_pypath" "$finaluwsgiini"



# root install doesn't require uwsgi to handle script names
if [ "$path_url" == "/" ]
then
	ynh_replace_string "manage-script-name = true" "manage-script-name = false" "$finaluwsgiini"
fi

ynh_add_systemd_config "$app" "weblate.service"

ynh_store_file_checksum "$finaluwsgiini"

#=================================================
# PIP INSTALLATION
#=================================================

ynh_script_progression --message="Install weblate using PIP..." --weight=10

(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	pip install --upgrade pip
	# prevent error: "command: 'install_requires' must be a string or list of strings containing valid project/version requirement specifiers"
	pip install --upgrade setuptools
	pip install Django==2.2.*
	pip install Weblate=="$current_version"
	pip install pytz python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2-binary phply django-redis hiredis aeidon ruamel.yaml
	# specific to YunoHost package:
	pip install django_sendmail_backend
)

#=================================================
# CONFIG FILE UPGRADE
#=================================================
ynh_script_progression --message="Create weblate configuration file..."
# save old settings file
settings="$final_path/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"

old_settings="$final_path/settings.$previous_version.old.py"

cp "$settings" "$old_settings"

check=$(ynh_check_if_checksum_is_different "$settings")

if [[ "$check" -eq 1 ]]
then
	echo "Settings.py was modified localy, running diff before using the new default file for $current_version."
	# generate previous defaults settings
	cp "$previous_version_template" "$old_settings"
	weblate_fill_settings "$old_settings"

	# store diff between defaults and local settings
	set +eu
	diff --unified "$old_settings" "$settings" > "$final_path/settings.${previous_version}_${current_version}.diff"
	set -eu

	# send diff to the server administrator
	mail_message="
	Weblate was updated from version $previous_version to $current_version
	Please read:
	https://docs.weblate.org/en/latest/admin/upgrade.html

	A new settings.py has been created:
	$settings

	You may have changed your defaults settings.
	To help you, here is a diff file with every changes you did.

	Diff has been created in:
	$final_path/settings.${previous_version}_${current_version}.diff

	Please note secret key is updated, this is normal.

	For any issue, please file a bug in: https://github.com/YunoHost-Apps/weblate_ynh
	"

	ynh_send_readme_to_admin "$mail_message" root "$admin_mail"
else
	echo "Settings.py was not modified, using the new default file for $current_version."
fi

# generate new defaults settings
cp "../conf/settings_history/settings.$current_version.py" "$settings"
weblate_fill_settings "$settings"

ynh_secure_remove "$old_settings"

#=================================================
# ACTIVATE CELERY
#=================================================
ynh_script_progression --message="Configure celery..."

celeryconf="$final_path/celery-weblate"
cp ../conf/celery-weblate "$celeryconf"

ynh_replace_string "__APP__"        "$app"         "$celeryconf"
ynh_replace_string "__FINALPATH__"  "$final_path"  "$celeryconf"

ynh_add_systemd_config "$app-celery" "celery-weblate.service"

#=================================================
# Run migration scripts
#=================================================
ynh_script_progression --message="Run migration scripts..."
(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	export DJANGO_SETTINGS_MODULE="weblate.settings"
	cd "${final_path}"

	weblate migrate --noinput
	weblate collectstatic --noinput
	weblate setuplang
	weblate setupgroups
)

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum "$final_path/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"

#=================================================
# SETUP CRON
#=================================================
ynh_script_progression --message="Configure cron file..."

cp ../conf/cron "/etc/cron.d/$app"
ynh_replace_string "__APP__"       "$app"         "/etc/cron.d/$app"
ynh_replace_string "__FINALPATH__" "$final_path/" "/etc/cron.d/$app"

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate

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

# Set right permissions for curl installation
chown -R root:root "$final_path"
chown -R "$app": "$final_path/data"

mkdir -p "$final_path/avatar-cache"
chown -R "$app": "$final_path/avatar-cache"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..."

if [ $is_public -eq 0 ]
then	# Remove the public access
	ynh_app_setting_delete "$app" skipped_uris
fi
# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set "$app" unprotected_uris "/"

	# ynh panel is not needed
	ynh_replace_string "	include conf.d/"  "	#include conf.d/"  "$finalnginxconf"

	ynh_store_file_checksum "$finalnginxconf"
fi

#=================================================
# Restart weblate
#=================================================
ynh_script_progression --message="Starting weblate's services..."

ynh_systemd_action --service_name="$app" --action="start"
ynh_systemd_action --service_name="$app-celery" --action="start"

#=================================================
# RELOAD NGINX
#=================================================

ynh_script_progression --message="Reloading nginx web server..."

ynh_systemd_action --service_name="nginx" --action="reload"

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

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