#!/bin/bash

#=================================================
# GENERIC STARTING
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

#=================================================
# RETRIEVE ARGUMENTS
#=================================================

old_domain=$YNH_APP_OLD_DOMAIN
old_path=$YNH_APP_OLD_PATH

new_domain=$YNH_APP_NEW_DOMAIN
new_path=$YNH_APP_NEW_PATH

app=$YNH_APP_INSTANCE_NAME

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=2

final_path=$(ynh_app_setting_get --app=$app --key=final_path)
multisite=$(ynh_app_setting_get  --app=$app --key=multisite)

if [ $multisite -eq 1 ]
then
	echo "A multisite installation of Wordpress can't be moved easily. Please have a look at the Wordpress codex to learn more about that." >&2
	ynh_die --message="https://codex.wordpress.org/Moving_WordPress#Moving_WordPress_Multisite"
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its url (may take a while)..." --weight=5

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"

	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# ACTIVATE MAINTENANCE MODE
#=================================================
ynh_script_progression --message="Activating maintenance mode..." --weight=2

path_url=$old_path
domain=$old_domain
ynh_maintenance_mode_ON

#=================================================
# CHECK WHICH PARTS SHOULD BE CHANGED
#=================================================

change_domain=0
if [ "$old_domain" != "$new_domain" ]
then
	change_domain=1
fi

change_path=0
if [ "$old_path" != "$new_path" ]
then
	change_path=1
fi

#=================================================
# MANAGE FAILURE OF THE SCRIPT
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating nginx web server configuration..." --weight=3

nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf

# Change the path in the nginx config file
if [ $change_path -eq 1 ]
then
	# Make a backup of the original nginx config file if modified
	ynh_backup_if_checksum_is_different --file="$nginx_conf_path"

	# Set global variables for nginx helper
	domain="$old_domain"
	path_url="$new_path"

	# Create a dedicated nginx config
	ynh_add_nginx_config
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]
then
	# Delete file checksum for the old conf file location
	ynh_delete_file_checksum --file="$nginx_conf_path"
	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf

	# Store file checksum for the new config file location
	ynh_store_file_checksum --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
fi

#=================================================
# SPECIFIC MODIFICATIONS
#=================================================
# UPDATE THE DATABASE
#=================================================

# Get the database table prefix
db_prefix=$(grep '^$table_prefix' "$final_path/wp-config.php" | sed "s/.*'\(.*\)'.*/\1/" )

ynh_mysql_execute_as_root --sql="UPDATE ${db_prefix}options SET option_value='https://$new_domain$new_path' WHERE option_name='siteurl'" --database=$app
ynh_mysql_execute_as_root --sql="UPDATE ${db_prefix}options SET option_value='https://$new_domain$new_path' WHERE option_name='home'" --database=$app

#=================================================
# UPDATE THE CRON
#=================================================

echo "# Reach everyday wp-cron.php?doing_wp_cron to trig the internal wordpress cron.
0 3  *  *  * root wget -q -O - https://$new_domain$new_path/wp-cron.php?doing_wp_cron >/dev/null 2>&1" > /etc/cron.d/$app

#=================================================
# GENERIC FINALISATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# DEACTIVE MAINTENANCE MODE
#=================================================
ynh_script_progression --message="Disabling maintenance mode" --weight=5

path_url=$old_path
domain=$old_domain
ynh_maintenance_mode_OFF

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

ynh_script_progression --message="Change of URL completed for $app" --last