#!/bin/bash

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

ynh_abort_if_errors

#=================================================
# LOAD 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)
key=$(ynh_string_random)

#=================================================
# 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==||")

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

#=================================================
# ENSURE 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

# (<2.17)
if [ -z "$db_name" ]; then	# If db_name doesn't exist, create it
	db_name=$(ynh_sanitize_dbid "$app")
	ynh_app_setting_set "$app" db_name "$db_name"
fi

# (<2.18) handle python3 migration (because of django 2.0)
if [[ -e "$final_path/venv/lib/python2.7/site-packages/weblate/settings.py" ]]
then
	settings="$final_path/venv/lib/python2.7/site-packages/weblate/settings.py"
	migrate_py2to3=true
else
	settings="$final_path/venv/lib/python3.4/site-packages/weblate/settings.py"
	migrate_py2to3=false
fi

# (<2.17) save memc_port if it doesn't exist
if [[ -z "$memc_port" ]]
then
	memc_port=$(cat "$settings" \
		| grep "'LOCATION': '127.0.0.1:" \
		| sed "s|.*:\\(.*\\)'.*|\\1|")
	ynh_app_setting_set "$app" memc_port "$memc_port"
fi

# (<2.18) migrade old uwsgi files if existing
if [ -e "/etc/systemd/system/$app.service" ]
then
	systemctl stop "$app.service"
	systemctl disable "$app.service"
	yunohost service remove "$app.service"
	ynh_secure_remove "$final_path/uwsgi.ini"
	ynh_secure_remove "/etc/systemd/system/$app.service"
fi

# (<2.18) move hub to the correct folder
if [ -e "$final_path/bin/hub" ]
then
	mv "$final_path/bin/hub" /usr/bin/
	chown root:root /usr/bin/hub
fi

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

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

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================

# 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

#=================================================
# CREATE DEDICATED USER
#=================================================

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

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

ynh_install_app_dependencies libxml2-dev libxslt-dev libfreetype6-dev \
	libjpeg-dev libz-dev libyaml-dev python3-dev python3-pip python3-virtualenv python-virtualenv \
	postgresql libpq-dev uwsgi uwsgi-plugin-python3 memcached

#=================================================
# SPECIFIC SETUP uwsgi
#=================================================

ynh_add_uwsgi_service

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

# save old settings file
cp "$settings" "$final_path/settings.$previous_version.old.py"

# (<2.18) handle python3 migration
if [[ "$migrate_py2to3" = true ]]
then
	ynh_secure_remove "$final_path/venv"
	virtualenv --python=python3 "${final_path}/venv"
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	pip install --upgrade pip
	pip install Weblate=="$current_version"

	settings="$final_path/venv/lib/python3.4/site-packages/weblate/settings.py"
	cp "$final_path/settings.$previous_version.old.py" "$settings"
	ynh_store_file_checksum "$settings"
fi

old_settings="./settings.$previous_version.old.py"
settings_diff="$final_path/settings.${previous_version}_${current_version}.diff"

(
	set +o nounset
	source "${final_path}/venv/bin/activate"
	set -o nounset
	pip install --upgrade pip
	pip install Weblate=="$current_version"
	pip install python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2 python-memcached
	# specific to YunoHost package:
	pip install django_sendmail_backend
)

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_file" "$old_settings"
	weblate_fill_settings "$old_settings"

	# store diff between defaults and local settings
	diff --unified "$old_settings" "$settings" > "$settings_diff"

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

	# send diff to the server administrator
	mail_subject="'$app' settings diff from $previous_version to $current_version"
	mail_message="
	Weblate was updated from version $previous_version to $current_version

	A new settings.py has been created in:
	$settings

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

	Diff has been created in:
	$settings_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
	"

	# Email server admin - for ACTION
	echo "$mail_message" | mail -s "$mail_subject" root -u root

	# inform weblate's admin
	mail_subject="'$app' was updated from $previous_version to $current_version"
	mail_message="
	Weblate was updated from version $previous_version to $current_version

	A new settings.py has been created and a diff has been sent to root user.
	Your administrator may have to update your settings.py to have a fully working installation.
	"

	# Email weblate's admin - for INFO
	echo "$mail_subject" | mail -s "$mail_subject" "$admin_mail"
else
	echo "Settings.py was not modified, using the new default file for $current_version."
	# generate new defaults settings
	cp "../conf/settings_history/settings.$current_version.py" "$settings"
	weblate_fill_settings "$settings"
fi

#=================================================
# 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/python3.4/site-packages/weblate/settings.py"

#=================================================
# GENERIC FINALIZATION
#=================================================

#=================================================
# SETUP 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

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

systemctl reload nginx