#!/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_print_info "Loading installation settings..."

# Needed for helper "ynh_add_nginx_config"
final_path=$(ynh_app_setting_get $app final_path)
config_path=$(ynh_app_setting_get $app config_path)
port=$(ynh_app_setting_get "$app" web_port)
portUnicorn=$(ynh_app_setting_get "$app" unicorn_port)
unicorn_worker_processes=$(ynh_app_setting_get "$app" unicorn_worker_processes)
client_max_body_size=$(ynh_app_setting_get "$app" client_max_body_size)

#=================================================
# CHECK THE SYNTAX OF THE PATHS
#=================================================

test -n "$old_path" || old_path="/"
test -n "$new_path" || new_path="/"
new_path=$(ynh_normalize_url_path $new_path)
old_path=$(ynh_normalize_url_path $old_path)

#=================================================
# 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
#=================================================
# MODIFY URL IN NGINX CONF
#=================================================
ynh_print_info "Updating nginx web server configuration..."

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

if [ $change_path -eq 1 ]; then
	ynh_print_info "Changing path..."

	#doc in: https://docs.gitlab.com/omnibus/settings/configuration.html#configuring-the-external-url-for-gitlab

	gitlab-ctl stop unicorn
	gitlab-ctl stop sidekiq

	# Make a backup of the original nginx config file if modified
	ynh_backup_if_checksum_is_different "$nginx_conf_path"
	# Set global variables for nginx helper
	domain="$old_domain"
	path_url="$new_path"
	# Create a dedicated nginx config
	ynh_add_nginx_config client_max_body_size
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]; then
	ynh_print_info "Changing domain..."

	# Delete file checksum for the old conf file location
	ynh_delete_file_checksum "$nginx_conf_path"
	mv $nginx_conf_path /etc/nginx/conf.d/$new_domain.d/$app.conf
	# Store file checksum for the new config file location
	ynh_store_file_checksum "/etc/nginx/conf.d/$new_domain.d/$app.conf"
fi

#=================================================
# SPECIFIC MODIFICATIONS
#=================================================
# CONFIGURE GITLAB
#=================================================
ynh_print_info "Configure gitlab..."

ynh_backup_if_checksum_is_different "$config_path/gitlab.rb"

mkdir -p $config_path

cp -f ../conf/gitlab.rb "$config_path/gitlab.rb"
ssh_port=$(grep -P "Port\s+\d+" /etc/ssh/sshd_config | grep -P -o "\d+")

domain="$new_domain"
path_url="$new_path"

ynh_replace_string "__GENERATED_EXTERNAL_URL__" "https://$domain${path_url%/}" "$config_path/gitlab.rb"
ynh_replace_string "__PORT__" "$port" "$config_path/gitlab.rb"
ynh_replace_string "__PORTUNICORN__" "$portUnicorn" "$config_path/gitlab.rb"
ynh_replace_string "__UNICORN_WORKER_PROCESSES__" "$unicorn_worker_processes" "$config_path/gitlab.rb"
ynh_replace_string "__CLIENT_MAX_BODY_SIZE__" "$client_max_body_size" "$config_path/gitlab.rb"
ynh_replace_string "__SSH_PORT__" "$ssh_port" "$config_path/gitlab.rb"

ynh_store_file_checksum "$config_path/gitlab.rb"

#=================================================
# RECONFIGURE GITLAB
#=================================================

gitlab-ctl reconfigure

if [ $change_path -eq 1 ]; then
	gitlab-ctl restart
	gitlab-ctl restart unicorn
fi

#=================================================
# WAITING GITLAB
#=================================================
ynh_print_info "Waiting for gitlab..."

# Action status to just wait the service
ynh_systemd_action --action=status --service_name="gitlab-runsvdir" --log_path="/var/log/$app/unicorn/current" --line_match="adopted" --timeout=3600

#=================================================
# GENERIC FINALISATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info "Reloading nginx web server..."

ynh_systemd_action --action=reload --service_name=nginx

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

ynh_print_info "Change of URL completed for $app"