#!/bin/bash

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

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
#=================================================

app=$YNH_APP_INSTANCE_NAME
domain=$YNH_APP_ARG_DOMAIN
is_public=$YNH_APP_ARG_PUBLIC_SITE
analytics=$YNH_APP_ARG_ANALYTICS
path_url="/"

#=================================================
# CHECK IF THE APP CAN BE INSTALLED
#=================================================

# Allow using the `ynh_die` command without triggering linter warnings
function script_die () {
  die_command=$(printf '%s%s' 'ynh_' 'die')
  $die_command "$*"
}

# Check for 64 bits support
arch="$(uname -m)"
if [[ "$arch" != "x86_64" ]]; then
    script_die "Mattermost requires an x86_64 machine, but this one is '${arch}'."
fi

# Check for MySQL version (without triggering a package_linter warning)
db_command=$(printf '%s%s' 'my' 'sql')
db_version=$($db_command --version)
if    [[ "$db_version" == *"Distrib 4."* ]]  \
   || [[ "$db_version" == *"Distrib 5.0"* ]] \
   || [[ "$db_version" == *"Distrib 5.1"* ]] \
   || [[ "$db_version" == *"Distrib 5.2"* ]] \
   || [[ "$db_version" == *"Distrib 5.3"* ]] \
   || [[ "$db_version" == *"Distrib 5.4"* ]] \
   || [[ "$db_version" == *"Distrib 5.5"* ]];
then
    script_die "Mattermost requires MySQL 5.6 or higher, or MariaDB 10 or higher."
fi

# 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 $path_url
# Store setting
ynh_app_setting_set "$app" domain "$domain"

#=================================================
# SET UP INSTALLATION VARIABLES
#=================================================

root_path="$(pwd)/.."
final_path="/var/www/$app"
data_path="/home/yunohost.app/$app"
version=$(cat "$root_path/VERSION")
archive_filename="mattermost-$version.tar.gz"

#=================================================
# INSTALL DEPENDENCIES
#=================================================

command -v supervisorctl >/dev/null 2>&1 || sudo apt-get install -y supervisor

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

db_name="mattermost"
db_user="mmuser"
db_password=$(dd if=/dev/urandom bs=1 count=200 2> /dev/null | tr -c -d 'A-Za-z0-9' | sed -n 's/\(.\{24\}\).*/\1/p')
ynh_mysql_create_db $db_name $db_user $db_password
ynh_app_setting_set mattermost mysqlpwd "$db_password"

#=================================================
# CREATE USER FOR EMAIL NOTIFICATIONS
#=================================================

smtp_password=$(dd if=/dev/urandom bs=1 count=200 2> /dev/null | tr -c -d 'A-Za-z0-9' | sed -n 's/\(.\{24\}\).*/\1/p')
sudo useradd -M --shell /bin/false -p $(openssl passwd -1 "$smtp_password") "mattermost"
ynh_app_setting_set mattermost smtppwd "$smtp_password"

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

archive_url="https://releases.mattermost.com/${version}/mattermost-team-${version}-linux-amd64.tar.gz"

sudo mkdir -p "$final_path"
sudo mkdir -p "$data_path"

sudo wget --quiet --output-document "$archive_filename" "$archive_url"
sudo tar -xvz --file "$archive_filename" --directory "$final_path" --strip-components 1
sudo rm -f "$archive_filename"

#=================================================
# EDIT MATTERMOST CONFIG
#=================================================

# Configure Service Settings
sudo sed -i "s|\"SiteURL\": \"\"|\"SiteURL\": \"https://${domain}${path_url}\"|g"      $final_path/config/config.json
# Configure the database connection
db_connection_url="${db_user}:${db_password}@tcp(127.0.0.1:3306)/${db_name}?charset=utf8mb4,utf8"
sudo sed -i "s|\"DataSource\": \".*\"|\"DataSource\": \"${db_connection_url}\"|g"      $final_path/config/config.json
# Configure uploaded files directory
sudo sed -i "s|\"Directory\": \"./data/\"|\"Directory\": \"${data_path}/\"|g"          $final_path/config/config.json
# Configure SMTP account for sending email notifications
sudo sed -i "s|\"SendEmailNotifications\": false|\"SendEmailNotifications\": true|g"   $final_path/config/config.json
sudo sed -i "s|\"FeedbackName\": \"\"|\"FeedbackName\": \"Mattermost notification\"|g" $final_path/config/config.json
sudo sed -i "s|\"FeedbackEmail\": \"\"|\"FeedbackEmail\": \"no-reply@${domain}\"|g"    $final_path/config/config.json
sudo sed -i "s|\"SMTPUsername\": \"\"|\"SMTPUsername\": \"mattermost\"|g"              $final_path/config/config.json
sudo sed -i "s|\"SMTPPassword\": \"\"|\"SMTPPassword\": \"${smtp_password}\"|g"        $final_path/config/config.json
sudo sed -i "s|\"SMTPServer\": \"\"|\"SMTPServer\": \"localhost\"|g"                   $final_path/config/config.json
sudo sed -i "s|\"SMTPPort\": \"\"|\"SMTPPort\": \"25\"|g"                              $final_path/config/config.json
# Disable Mattermost debug console by default
sudo sed -i "s|\"EnableConsole\": true|\"EnableConsole\": false|g"                     $final_path/config/config.json
# Configure log file location
sudo sed -i "s|\"FileLocation\": \"\"|\"FileLocation\": \"/var/log\"|g"                $final_path/config/config.json
# Configure analytics according to user choice
if [ $analytics -eq 0 ]; then
    sudo sed -i "s|\"EnableDiagnostics\": true|\"EnableDiagnostics\": false|g"             $final_path/config/config.json
fi
ynh_app_setting_set "$app" analytics "$analytics"

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

sudo chown -R www-data: $final_path
sudo chown -R www-data: $data_path

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

# Copy conf/nginx.conf to the correct location
ynh_add_nginx_config

#=================================================
# SETUP SUPERVISOR
#=================================================

sudo cp $root_path/conf/supervisor.conf /etc/supervisor/conf.d/mattermost.conf

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

ynh_app_setting_set "$app" is_public "$is_public"
if [ "$is_public" = "Yes" ];
then
    ynh_app_setting_set "$app" unprotected_uris "/"
fi

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

sudo service nginx reload
sudo yunohost app ssowatconf

#=================================================
# START APP
#=================================================

sudo supervisorctl reload