#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
language=$(ynh_app_setting_get --app=$app --key=language)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
wiki_name=$(ynh_app_setting_get --app=$app --key=wiki_name)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)

fpm_footprint=$(ynh_app_setting_get --app=$app --key=fpm_footprint)
fpm_usage=$(ynh_app_setting_get --app=$app --key=fpm_usage)

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=6

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# If db_name doesn't exist, create it
if [ -z "$db_name" ]; then
	db_name=$(ynh_sanitize_dbid --db_name=$app)
	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
fi

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/var/www/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

# If fpm_footprint doesn't exist, create it
if [ -z "$fpm_footprint" ]; then
	fpm_footprint=low
	ynh_app_setting_set --app=$app --key=fpm_footprint --value=$fpm_footprint
fi

# If fpm_usage doesn't exist, create it
if [ -z "$fpm_usage" ]; then
	fpm_usage=low
	ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

if ! ynh_permission_exists --permission="admin"; then
	# Create the required permissions
	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
fi

# Create a permission if needed
if ! ynh_permission_exists --permission="api"; then
	ynh_permission_create --permission="api" --url="/api" --allowed="visitors" --show_tile="false" --protected="true"
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=4

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
	ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="ldap_authentication2"
	ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="ldap_provider"
	ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="pluggable_auth"

	# Note(decentral1se): Disabled and unused for now ...
	# ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="ldap_groups"
	# ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="ldap_userinfo"
	# ynh_setup_source --dest_dir="$final_path/extensions/" --source_id="ldap_authorization"

fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=3

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# PHP-FPM CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=1

# Create a dedicated PHP-FPM config
ynh_add_fpm_config --phpversion=$phpversion --usage=$fpm_usage --footprint=$fpm_footprint

#=================================================
# SPECIFIC UPGRADE
#=================================================
# REMOVE LEGACY LDAP USER
#=================================================
# Removed in dec. 2020
ldap_user=$(ynh_app_setting_get --app=$app --key=ldap_user)
if [[ -n "$ldap_user" ]]; then
	yunohost user delete "$ldap_user"
	ynh_app_setting_delete --app=$app --key=ldap_user
	ynh_app_setting_delete --app=$app --key=ldap_password
fi

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================
ynh_backup_if_checksum_is_different --file="$final_path/LocalSettings.php"

#=================================================
# REPLACE CONFIGURATION SETTINGS
#=================================================
ynh_script_progression --message="Upgrading application files..." --weight=4

rm "$final_path/LocalSettings.php"
cp ../conf/LocalSettings.php "$final_path/LocalSettings.php"

ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__WIKI_NAME__" --replace_string="$wiki_name"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__ADMIN__"     --replace_string="$admin"

if [ "$path_url" = "/" ]; then
	# MediaWiki expects a "" for the root URL which is typically assumed to be
	# "/" by other application packages. Therefore, we assume end-users will do
	# this as well and make sure to ensure an "" in all cases where "/" is
	# specified
	ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__PATH__"  --replace_string=""
else
	ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__PATH__"  --replace_string="$path_url"
fi

ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__DOMAIN__"    --replace_string="$domain"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__DB_NAME__"   --replace_string="$db_name"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__DB_USER__"   --replace_string="$db_name"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__DB_PWD__"    --replace_string="$db_pwd"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__LANGUAGE__"  --replace_string="$language"

secret=$(ynh_string_random 64)
ynh_app_setting_set $app secret "$secret"
ynh_replace_string --target_file="$final_path/LocalSettings.php" --match_string="__SECRET__"    --replace_string="$secret"

# Check for admin password being too short for the new mediawiki requirements
password_length=$(ynh_app_setting_get --app=$app --key=admin_password | awk '{print length}')
if (( password_length < 10 )); then
	ynh_print_warn -m "The current admin password is $password_length long. Mediawiki now requires a 10 chars minimum password."
	ynh_print_warn -m "We are adapting the minimum length, but that would be great to change the admin password."
	echo "\$wgPasswordPolicy['policies']['default']['MinimalPasswordLength'] = 10;" >> "$final_path/LocalSettings.php"
fi

"php$phpversion" "$final_path/maintenance/update.php"

# Set permissions on app files
chown -R $app:www-data "$final_path"

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

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Upgrade of $app completed" --last