#!/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
#=================================================

db_name=$(ynh_app_setting_get "$app" db_name)
db_pwd=$(ynh_app_setting_get $app db_pwd)
final_path=$(ynh_app_setting_get "$app" final_path)

#=================================================
# CHECK PATHS SYNTAX
#=================================================

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 FILE
#=================================================

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

# Change the path in the nginx config file
if [ $change_path -eq 1 ]
then
	domain="$old_domain"
	path_url="$new_path"
	ynh_add_nginx_config
	# Reference: https://meta.discourse.org/t/subfolder-support-with-docker/30507?u=falco&source_topic_id=54191
	if [ "$path_url" != "/" ] ; then
	  ynh_replace_string '$proxy_add_x_forwarded_for' '$http_your_original_ip_header' "/etc/nginx/conf.d/$domain.d/$app.conf"
	fi
	ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
fi

# Change the domain for nginx
if [ $change_domain -eq 1 ]
then
  # Delete file checksum for the old conf file location
  ynh_delete_file_checksum "$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
#=================================================

# Stop Discourse service
systemctl stop $app

discourse_config_file="$final_path/config/discourse.conf"
# Configure hostname
ynh_replace_string "hostname = .*" "hostname = \"$new_domain\"" "$discourse_config_file"
ynh_replace_string "relative_url_root = .*" "relative_url_root = ${path_url%/}" "$discourse_config_file"
ynh_replace_string "smtp_domain = .*" "smtp_domain = $new_domain" "$discourse_config_file"

# Calculate and store the config file checksum
ynh_store_file_checksum "$discourse_config_file"

# Change URL setting
echo "UPDATE site_settings SET value = replace(value, '${old_path%/}/images/', '${new_path%/}/images/');
UPDATE site_settings SET value = '${new_path}') WHERE name='long_polling_base_url';"

ynh_psql_connect_as $db_name $db_pwd $db_name <<< "UPDATE site_settings SET value = replace(value, '${old_path%/}/images/', '${new_path%/}/images/');
UPDATE site_settings SET value = '${new_path}' WHERE name='long_polling_base_url';"

# Get the number of Unicorn workers used
unicorn_workers=$(cat /etc/systemd/system/$app.service  |grep UNICORN_WORKERS | sed "s/.*UNICORN_WORKERS=//")
if [ -z "$unicorn_workers" ] ; then
	# By default, 3 workers are used
	unicorn_workers=3
fi
# Wait for discourse to be fully started
ynh_check_starting "INFO -- : worker=$((unicorn_workers-1)) ready" "$final_path/log/unicorn.stderr.log" "240" "$app"

# # Remap URLs in forum posts
exec_login_as $app RAILS_ENV=production bundle exec script/discourse remap ${old_path%/}/uploads ${new_path%/}/uploads <<< "YES
# "

rake_exec="exec_login_as $app RAILS_ENV=production bin/rake"

# Regenerate assets
$rake_exec assets:precompile

# Regenerate all forum posts
$rake_exec posts:rebake

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX
#=================================================

systemctl reload nginx