#!/bin/bash

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

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

#=================================================
# 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=1

# Needed for helper "ynh_add_nginx_config"
config_path=$(ynh_app_setting_get --app=$app --key=config_path)
port=$(ynh_app_setting_get --app="$app" --key=web_port)
puma_port=$(ynh_app_setting_get --app="$app" --key=puma_port)
sidekiq_port=$(ynh_app_setting_get --app="$app" --key=sidekiq_port)
puma_worker_processes=$(ynh_app_setting_get --app="$app" --key=puma_workers)
puma_min_threads=$(ynh_app_setting_get --app="$app" --key=puma_min_threads)
puma_max_threads=$(ynh_app_setting_get --app="$app" --key=puma_max_threads)
client_max_body_size=$(ynh_app_setting_get --app="$app" --key=client_max_body_size)

#=================================================
# 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_script_progression --message="Updating NGINX web server configuration..." --weight=1

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

if [ $change_path -eq 1 ]; then
	ynh_script_progression --message="Changing path..." --weight=4

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

	gitlab-ctl stop puma
	gitlab-ctl stop sidekiq

	# 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 client_max_body_size
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]; then
	ynh_script_progression --message="Changing domain..." --weight=4

	# 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
#=================================================
# CHECK IF KERNEL IS READ-ONLY
#=================================================

modify_kernel_parameters="true"

for value_to_check in "kernel.shmall" "kernel.shmmax" "kernel.sem" "net.core.somaxconn"
do
	if ! ynh_exec_fully_quiet sysctl --write $value_to_check="$(sysctl --value $value_to_check)"; then
		modify_kernel_parameters="false"
		break
	fi
done

#=================================================
# CONFIGURE GITLAB
#=================================================
ynh_script_progression --message="Configure GitLab..." --weight=28

mkdir -p $config_path
ssh_port=$(grep -P "Port\s+\d+" /etc/ssh/sshd_config | grep -P -o "\d+")

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

generated_external_url="https://$domain${path_url%/}"

ynh_add_config --template="$YNH_APP_BASEDIR/conf/gitlab.rb" --destination="$config_path/gitlab.rb"

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

ynh_exec_warn_less gitlab-ctl reconfigure

#=================================================
# WAITING GITLAB
#=================================================
ynh_script_progression --message="Waiting for GitLab..." --weight=15

ynh_systemd_action --action=restart --service_name="gitlab-runsvdir" --log_path="/var/log/$app/puma/current" --line_match="Listening on http://127.0.0.1:$puma_port" --timeout=300

#=================================================
# GENERIC FINALISATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --action=reload --service_name=nginx

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

ynh_script_progression --message="Change of URL completed for GitLab" --last