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

app=$YNH_APP_INSTANCE_NAME
domain=$YNH_APP_ARG_DOMAIN
is_public=$YNH_APP_ARG_IS_PUBLIC
analytics=$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

#=================================================
# FIND AN AVAILABLE PATH
#=================================================

# 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"

#=================================================
# FIND AN AVAILABLE PORT
#=================================================

# Find an available port
port=$(ynh_find_port 8065)
# Store setting
ynh_app_setting_set "$app" port "$port"

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

root_path="$(pwd)/.."
final_path="/var/www/$app"
data_path="/home/yunohost.app/$app"
logs_path="/var/log/$app"

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

db_name="$app"
db_user="mmuser"
db_password=$(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" "$db_password"
ynh_app_setting_set "$app" mysqlpwd "$db_password"

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

mattermost_user="$app"
mattermost_user_password=$(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 $(openssl passwd -1 "$mattermost_user_password") "$mattermost_user"
ynh_app_setting_set "$app" smtppwd "$mattermost_user_password"

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

ynh_app_setting_set "$app" final_path "$final_path"
ynh_setup_source "$final_path"

sudo mkdir -p "$data_path"
sudo mkdir -p "$logs_path"

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

# Configure Service Settings
sudo sed -i "s|\"SiteURL\": \"\"|\"SiteURL\": \"https://${domain}${path_url}\"|g"          $final_path/config/config.json
sudo sed -i "s|\"ListenAddress\": \".*\"|\"ListenAddress\": \"127.0.0.1:${port}\"|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_user}\"|g"          $final_path/config/config.json
sudo sed -i "s|\"SMTPPassword\": \"\"|\"SMTPPassword\": \"${mattermost_user_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"                         $final_path/config/config.json
# Configure log file location
sudo sed -i "s|\"FileLocation\": \"\"|\"FileLocation\": \"$logs_path\"|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 "$mattermost_user:www-data" "$final_path"
sudo chown -R "$mattermost_user:www-data" "$data_path"
sudo chown -R "$mattermost_user:adm"      "$logs_path"

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

ynh_add_nginx_config

#=================================================
# SYSTEMD CONFIGURATION
#=================================================

mattermost_add_systemd_config

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

sudo yunohost service add "$app" --log "$logs_path/mattermost.log"

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

ynh_app_setting_set "$app" is_public "$is_public"

if [[ $is_public == "1" ]]; then
    # Make the app accessible to the public
    ynh_app_setting_set "$app" unprotected_uris "/"
fi

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

sudo systemctl reload nginx

#=================================================
# START SERVER
#=================================================

sudo systemctl start "$app"