#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#===================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#===================================================

# This is a multi-instance app, meaning it can be installed several times independently
# The id of the app as stated in the manifest is available as $YNH_APP_ID
# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
# The app instance name is available as $YNH_APP_INSTANCE_NAME
#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
# The app instance name is probably what you are interested the most, since this is
# guaranteed to be unique. This is a good unique identifier to define installation path,
# db names, ...
app=$YNH_APP_INSTANCE_NAME

# Retrieve arguments

domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
title=$YNH_APP_ARG_TITLE
is_public=$YNH_APP_ARG_IS_PUBLIC
flarum_version="v0.1.0-beta.7"

#===================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#===================================================

final_path=/var/www/$app
test ! -e "$final_path" || ynh_die "This path already contains a folder"

# Normalize the url path syntax
path_url=$(ynh_normalize_url_path $path_url)

# Check web path availability
ynh_webpath_available $domain $path_url

# Register (book) web path
ynh_webpath_register $app $domain $path_url

#===================================================
# STORE SETTINGS FROM MANIFEST
#===================================================

# Save app settings
ynh_app_setting_set $app domain $domain
ynh_app_setting_set $app path $path_url
ynh_app_setting_set $app admin $admin
ynh_app_setting_set $app is_public $is_public
ynh_app_setting_set $app final_path $final_path

#===================================================
# CREATE DEDICATED USER
#===================================================

ynh_system_user_create $app "$final_path"
sudo usermod -a -G www-data $app

#=================================================
# COMPOSER INSTALLATION
#=================================================

composer_path=/opt/${app}_composer
# Test if composer is installed
if ! type "${composer_path}/composer" > /dev/null; then

# Prepare composer directories
sudo mkdir -p $composer_path
sudo mkdir -p $composer_path/cache
sudo chown -R $app:www-data $composer_path
sudo chmod -R 0775 $composer_path

# Install composer (https://getcomposer.org)
EXPECTED_SIGNATURE=$(wget https://composer.github.io/installer.sig -O - -q)
php -r "copy('https://getcomposer.org/installer', '$composer_path/composer-setup.php');"
ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', '$composer_path/composer-setup.php');")
if [ "$EXPECTED_SIGNATURE" = "$ACTUAL_SIGNATURE" ]
then
    sudo su - $app -s /bin/bash -c "php $composer_path/composer-setup.php --install-dir=$composer_path --filename=composer --quiet"
    RESULT=$?
else
    >&2 echo 'ERROR: Invalid Composer installer signature'
    RESULT=1
fi
if [ $RESULT != 0 ]
then
  ynh_die 'Composer could not be installed'
fi

fi

COMPOSER_HOME=$composer_path

#=================================================
# FLARUM INSTALLATION
#=================================================

# Prepare Flarum temp directory
tmp=/tmp/$app
sudo mkdir -p $tmp
sudo chown -R $app:www-data $tmp
sudo chmod -R 0775 $tmp

# Install Flarum
sudo su - $app -s /bin/bash -c "php -d memory_limit=-1 $composer_path/composer create-project flarum/flarum $tmp $flarum_version --stability=beta --ansi"

sudo cp -Rf $tmp/* $final_path
sudo chown -R $app:www-data $final_path
sudo chmod 0775 -R $final_path
ynh_secure_remove "$tmp"

#=================================================
# CREATE A MYSQL DATABASE
#=================================================

db_name=$(ynh_sanitize_dbid $app)
ynh_app_setting_set $app db_name $db_name
ynh_mysql_setup_db $db_name $db_name
ynh_app_setting_set "$app" db_pwd "$db_pwd"

#=================================================
# NGINX CONFIGURATION
#=================================================

# Bug in Nginx with locations and aliases (see http://stackoverflow.com/a/35102259 )
if [ $path_url = "/" ]; then
    sed -i "s@YNH_WWW_ROOTPATH@@g" ../conf/nginx.conf
    sed -i "s@YNH_WWW_ROOTAPP@/@g" ../conf/nginx.conf
else
    sed -i "s@YNH_WWW_ROOTPATH@$path_url@g" ../conf/nginx.conf
    sed -i "s@YNH_WWW_ROOTAPP@$path_url$path_url@g" ../conf/nginx.conf
fi
# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# PHP-FPM CONFIGURATION
#=================================================

# Create a dedicated php-fpm config
ynh_add_fpm_config

#=================================================
# SETUP LOGROTATE
#=================================================

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate

#=================================================
# SETUP SSOWAT
#=================================================

if [ $is_public -eq 0 ]
then	# Remove the public access
	ynh_app_setting_delete $app skipped_uris
fi
# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway.
	ynh_app_setting_set $app unprotected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================

systemctl reload nginx

#=================================================
# FLARUM POST-INSTALL
#=================================================

# Only if admin user or title were specified
if [[ -n $admin && -n $title ]]; then
finalflarumconf="$final_path/configuration.yml"
cp ../sources/configuration.yml $finalflarumconf
admin_pwd=$(ynh_string_random 8)
sed -i "s@YNH_APP_DOMAIN@$domain@g" $finalflarumconf
sed -i "s@/YNH_WWW_PATH@$path_url@g" $finalflarumconf
sed -i "s@YNH_WWW_APP@$app@g" $finalflarumconf
sed -i "s@YNH_DB_PASS@$db_pwd@g" $finalflarumconf
sed -i "s@YNH_ADMIN_USER@$admin@g" $finalflarumconf
sed -i "s@YNH_ADMIN_PASS@$admin_pwd@g" $finalflarumconf
admin_mail=$(ynh_user_get_info $admin mail)
sed -i "s%YNH_ADMIN_EMAIL%$admin_mail%g" $finalflarumconf
sed -i "s@YNH_FORUM_TITLE@$title@g" $finalflarumconf
cd "$final_path"
exec_as www-data \
 php -d memory_limit=-1 flarum install -f configuration.yml

# Generate and add root token for user creation and deletion
roottoken=$(ynh_string_random 40)
apitablesql="CREATE TABLE IF NOT EXISTS api_keys (api_key TEXT(40) NOT NULL)"
rootsql="INSERT INTO api_keys VALUES ('"$roottoken"')"
ynh_mysql_execute_as_root "$apitablesql" $db_name
ynh_mysql_execute_as_root "$rootsql" $db_name
ynh_app_setting_set "$app" root_token "$roottoken"

# Install the SSOwat auth extension
#sudo su - www-data -s /bin/bash -c "cd $final_path && /opt/flarum_composer/composer require 'tituspijean/flarum-ext-auth-ssowat:*@dev'"

# Configure SSOwat auth extension
#ssowatdomain=$(</etc/yunohost/current_host)
#data='{"flarum-ext-auth-ssowat.address": "'$ssowatdomain'","flarum-ext-auth-ssowat.onlyUse": true}'
#rep=$(curl -s -o /dev/null -w "%{http_code}" -k -i \
#    -H "Content-Type: application/json" \
#    -H "Authorization: Token $roottoken; userId=1" \
#    -X POST -d "$data" \
#    -L https://${domain}${path}/api/settings )
#
#if [[ $rep != 204 ]]; then
#    ynh_die "ERROR: Could not configure SSOwat extension"
#fi

# Create missing users
for username in $(ynh_user_list); do
    if [ "$username" == "$admin" ]; then continue; else
        userpass=$(ynh_string_random 16)
        usermail=$(ynh_user_get_info $username 'mail')
        data='{"data":{"attributes":{"username":"'$username'","email":"'$usermail'","password":"'$userpass'"}}}'
        rep=$(curl -s -o /dev/null -w "%{http_code}" -k -i \
                   -H "Content-Type: application/json" \
                   -H "Authentication: Token $roottoken" \
                   -X POST -d "$data" \
                   -L https://${domain}${path_url}/api/users )
        if [[ $rep != 201 ]]; then
            ynh_die "ERROR: Flarum account creation failed for $username"
        fi
    fi
done
>&2 echo "Installation successfull. Admin : $admin, password : $admin_pwd. Change it!"
else
>&2 echo "Installation successfull. Post-installation required, visit your Flarum instance!"
fi