#!/usr/bin/env 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..." --time --weight=1

# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
is_public=$(ynh_app_setting_get --app="$app" --key=is_public)
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
port=$(ynh_app_setting_get --app="$app" --key=port)


#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before changing its url (may take a while)..." --time --weight=1

# 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

#=================================================
# 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

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping the systemd service..." --time --weight=1

ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_script_progression --message="Updating nginx web server configuration..." --time --weight=1

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
#=================================================
# BUILD YARN DEPENDENCIES
#=================================================
ynh_script_progression --message="Rebuilding yarn dependencies..." --weight=2

chown -R "$app":"$app" "$final_path"

pushd "$final_path" || return 1
    ynh_use_nodejs
    sudo -u "$app" env "$ynh_node_load_PATH" yarn global add wetty
    yarn_bin_dir="$(sudo -u "$app" env "$ynh_node_load_PATH" yarn global bin)"
popd || return 1

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring the systemd service..." --weight=1

domain="$new_domain"

# Create a dedicated systemd config
ynh_backup_if_checksum_is_different --file="/etc/systemd/system/$app.service"
ynh_remove_systemd_config
ynh_add_systemd_config --others_var="domain port path_url ynh_node_load_PATH yarn_bin_dir"
ynh_store_file_checksum --file="/etc/systemd/system/$app.service"

systemctl daemon-reload

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

ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..." --time --weight=1

ynh_systemd_action --service_name=nginx --action=reload

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

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