#!/bin/bash

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

source _common.sh
source ynh_add_extra_apt_repos__3
source /usr/share/yunohost/helpers

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

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
admin_email=$(ynh_app_setting_get --app=$app --key=admin_email)
random_key=$(ynh_app_setting_get --app=$app --key=random_key)
name=$(ynh_app_setting_get --app=$app --key=name)
port=$(ynh_app_setting_get --app=$app --key=port)
db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
cache=$(ynh_app_setting_get --app=$app --key=cache)
size=$(ynh_app_setting_get --app=$app --key=size)
registration=$(ynh_app_setting_get --app=$app --key=registration)

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

upgrade_type=$(ynh_check_app_version_changed)

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

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

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

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

#Switch variables name
psql_db=$(ynh_app_setting_get --app=$app --key=psql_db)

if [ -n "$psql_db" ]
then
    db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
    db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
    ynh_app_setting_set --app=$app --key=db_name --value=$db_name
    ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
	ynh_app_setting_delete --app=$app --key=psql_db
	ynh_app_setting_delete --app=$app --key=psqlpwd
fi

#Close a port

if yunohost firewall list | grep -q "\- $port$"
then
	ynh_print_info --message="Closing port $port..."
	ynh_exec_warn_less yunohost firewall disallow TCP $port
fi

# Remove old repository
ynh_secure_remove --file="/etc/apt/sources.list.d/erlang-solutions.list"
apt-key del A14F4FCA

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_print_info --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
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

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

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

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

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_print_info --message="Upgrading source files..."

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

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

# Create a dedicated nginx config
ynh_add_nginx_config

ynh_secure_remove --file="/etc/nginx/conf.d/$app-cache.conf"
if [ $cache -eq 1 ]
then
	cp -rf "../conf/cache.conf" "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string --match_string="{APP}" --replace_string="$app" --target_file="/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string --match_string="__SIZE__" --replace_string="$size" --target_file="/etc/nginx/conf.d/$app-cache.conf"
	ynh_store_file_checksum --file="/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string --match_string="{APP}" --replace_string="$app" --target_file="../conf/media.conf"
	ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/media.conf"
	sudo su -c "cat ../conf/media.conf >> /etc/nginx/conf.d/$domain.d/$app.conf"
	ynh_store_file_checksum --file="/etc/nginx/conf.d/$domain.d/$app.conf"
fi

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_print_info --message="Upgrading dependencies..."

ynh_install_app_dependencies $pkg_dependencies

lsb_name="$(lsb_release --codename --short)"
ynh_install_extra_app_dependencies --repo="deb http://packages.erlang-solutions.com/debian $lsb_name contrib" --package="$extra_pkg_dependencies" --key='https://packages.erlang-solutions.com/debian/erlang_solutions.asc'

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

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MODIFY A CONFIG FILE
#=================================================

cp -f ../conf/generated_config.exs "$final_path/$app/config/prod.secret.exs"

ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__KEY__" --replace_string="$random_key" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__INSTANCE_NAME__" --replace_string="$name" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__ADMIN_EMAIL__" --replace_string="$admin_email" --target_file="$final_path/$app/config/prod.secret.exs"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/$app/config/prod.secret.exs"

if [ $cache -eq 1 ]
then
	ynh_replace_string --match_string="__MEDIA_CACHE__" --replace_string="true" --target_file="$final_path/$app/config/prod.secret.exs"
else
	ynh_replace_string --match_string="__MEDIA_CACHE__" --replace_string="false" --target_file="$final_path/$app/config/prod.secret.exs"
fi

#  Set registrations open/closed
if [ $registration -eq 1 ]
then
 ynh_replace_string --match_string="__REG__" --replace_string="true" --target_file="$final_path/$app/config/prod.secret.exs"
else
 ynh_replace_string --match_string="__REG__" --replace_string="false" --target_file="$final_path/$app/config/prod.secret.exs"
fi

#=================================================
# MAKE UPGRADE
#=================================================

# Give permission to the final_path
chown -R "$app":"$app" "$final_path"
pushd $final_path/$app
    sudo -u "$app" MIX_ENV=prod mix deps.get
    sudo -u "$app" MIX_ENV=prod mix ecto.migrate
	
	#Generate key pair
    sudo -u "$app" MIX_ENV=prod mix web_push.gen.keypair >> "config/prod.secret.exs"
	ynh_replace_string --match_string="administrator@example.com" --replace_string="$admin_email" --target_file="$final_path/$app/config/prod.secret.exs" 
popd

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

ynh_backup_if_checksum_is_different --file="$final_path/$app/config/prod.secret.exs"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$final_path/$app/config/prod.secret.exs"

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

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_print_info --message="Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_add_systemd_config

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

# Set permissions on app files
chown -R "$app":"$app" "$final_path"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info --message="Upgrading SSOwat configuration..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
fi

#=================================================
# START SERVICE
#=================================================
ynh_print_info --message="Starting a systemd service..."

ynh_systemd_action --service_name=$app --action="start" --log_path=systemd --line_match="Running Pleroma.Web.Endpoint"
sleep 10

#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info --message="Reloading nginx web server..."

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_print_info --message="Upgrade of $app completed"