#!/bin/bash

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

source _common.sh
source ynh_install_go
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)
path_url=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
password=$(ynh_app_setting_get --app=$app --key=password)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
group_name=$(ynh_app_setting_get --app=$app --key=group_name)
port=$(ynh_app_setting_get --app=$app --key=port)
ldap_port=$(ynh_app_setting_get --app=$app --key=ldap_port)
key=$(ynh_app_setting_get --app=$app --key=key)
turn_port=$(ynh_app_setting_get --app=$app --key=turn_port)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)

if ynh_compare_current_package_version --comparison le --version 0.3.5~ynh3
then
    ynh_die --message="Please, you need to remove the app and reinstall it"
fi

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..." --weight=1

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=1

# 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=3

ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd"
ynh_systemd_action --service_name=${app}_ldap --action="stop" --log_path="systemd"

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

# If open, close direct access to $port in firewall
if yunohost firewall list | grep -q "\- $port$"
then
    ynh_exec_warn_less yunohost firewall disallow TCP $port
fi

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

# If ldap_port doesn't exist, create it
if [ -z "$ldap_port" ]; then
	ldap_port=$(ynh_find_port --port=$(($port + 1)))
	ynh_app_setting_set --app=$app --key=port --value=$ldap_port
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

# We remove the old admin/password file if present
if [ -f "$final_path/data/passwd" ] ; then
    ynh_secure_remove --file="$final_path/data/passwd"
fi

#=================================================
# 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=$app --home_dir="$final_path"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=2

	ynh_setup_source --dest_dir="$final_path/build"
	ynh_setup_source --dest_dir="$final_path/build_ldap" --source_id="ldap"
fi

mkdir -p "$final_path/live/data"
mkdir -p "$final_path/live_ldap/data"
ynh_secure_remove --file="$final_path/live/static/"
cp -r "$final_path/build/static/" "$final_path/live/"
ynh_replace_string --match_string="<div class=\"galene-header\">Galène</div>" --replace_string="<div class=\"galene-header\" onclick=\"location.href=window.location.origin\" style=\"cursor:pointer\">Galène</div>" --target_file="$final_path/live/static/galene.html"
chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=3

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD APP
#=================================================
ynh_script_progression --message="Building app..." --weight=1

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_exec_warn_less ynh_install_go --go_version=$go_version
	ynh_use_go
	pushd $final_path/build/
		ynh_exec_as $app CGO_ENABLED=0 $ynh_go build -ldflags='-s -w' -o $final_path/live/
	popd
	pushd $final_path/build_ldap/
		ynh_exec_as $app CGO_ENABLED=0 $ynh_go build -ldflags='-s -w' -o $final_path/live_ldap/
	popd
	ynh_remove_go
	ynh_secure_remove --file="$final_path/build/"
	ynh_secure_remove --file="$final_path/build_ldap/"
	ynh_secure_remove --file="$final_path/.cache/"
	ynh_secure_remove --file="$final_path/go/"
	ynh_secure_remove --file="$final_path/.go-version"
fi

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=2

# Configure Galene
ynh_add_config --template="../conf/config.json" --destination="$final_path/live/data/config.json"
chmod 400 "$final_path/live/data/config.json"
chown $app:$app "$final_path/live/data/config.json"

# Configure Galene LDAP
# If key doesn't exist, create it
if [ -z "$key" ]; then
	key=$(jose jwk gen -i '{"kty":"oct","alg":"HS256"}')
	ynh_app_setting_set --app=$app --key=key --value=$key
fi
ynh_add_config --template="../conf/galene-ldap.json" --destination="$final_path/live_ldap/data/galene-ldap.json"
chmod 400 "$final_path/live_ldap/data/galene-ldap.json"
chown $app:$app "$final_path/live_ldap/data/galene-ldap.json"

# Create a group name config
ynh_add_config --template="../conf/groupname.json" --destination="$datadir/groups/$group_name.json"
chmod 400 "$datadir/groups/$group_name.json"
chown $app:$app "$datadir/groups/$group_name.json"

# Create a group name authenticated on LDAP
ynh_add_config --template="../conf/groupname-ldap.json" --destination="$datadir/groups/YunoHost_Users.json"
chmod 400 "$datadir/groups/YunoHost_Users.json"
chown $app:$app "$datadir/groups/YunoHost_Users.json"

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

public_ip4="$(curl -s ip.yunohost.org)" || true

# Create a dedicated systemd config
ynh_add_systemd_config
ynh_add_systemd_config --service=${app}_ldap --template="ldap.service"

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

yunohost service add $app --description="Videoconferencing server" --needs_exposed_ports="$turn_port"
yunohost service add ${app}_ldap --description="LDAP integration for the videoconferencing server"

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

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd"
ynh_systemd_action --service_name=${app}_ldap --action="start" --log_path="systemd"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=2

ynh_systemd_action --service_name=nginx --action=reload

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

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