#!/bin/bash

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

source _common.sh
source experimental_helpers/_ynh_add_extra_apt_repos
source experimental_helpers/ynh_install_php
source experimental_helpers/ynh_exec_as
source experimental_helpers/ynh_composer
source experimental_helpers/ynh_send_readme_to_admin
source experimental_helpers/hardware
source experimental_helpers/ynh_add_swap
source /usr/share/yunohost/helpers

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

ynh_clean_setup () {
  ### Remove this function if there's nothing to clean before calling the remove script.
  true
}
# 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=$YNH_APP_ARG_IS_PUBLIC
language=$YNH_APP_ARG_LANGUAGE
bazaar_extension=$YNH_APP_ARG_BAZAAR_EXTENSION

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

#===================================================
# CHECK IF THE APP CAN BE INSTALLED WITH CURRENT RAM
#===================================================
ynh_script_progression --message="Ensuring sufficient memory..." --time --weight=1

# Check RAM
if [[ $(ynh_get_ram --free) < 1000 ]]; then
  ynh_add_swap --size=1000
fi

#===================================================
# 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 language $language
ynh_app_setting_set $app php_version $php_version
ynh_app_setting_set $app project_version $project_version
ynh_app_setting_set $app core_version $core_version
ynh_app_setting_set $app ssowat_version $ssowat_version
ynh_app_setting_set $app bazaar_extension $bazaar_extension

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# INSTALL PHP
#=================================================

if [ "$(lsb_release --codename --short)" = "buster" ]; then
  pkg_dependencies="$pkg_dependencies $extra_pkg_dependencies"
else
  ynh_script_progression --message="Installing php${php_version}..." --time --weight=1
  ynh_install_php --phpversion="${php_version}" --package="$extra_pkg_dependencies"
fi

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..."  --time --weight=1

_ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# 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"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=7

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path"

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

# Bug in Nginx with locations and aliases (see http://stackoverflow.com/a/35102259 )
if [ $path_url = "/" ]; then
  ynh_replace_string "__PATH_HACK__" "" "../conf/nginx.conf"
else
  ynh_replace_string "__PATH_HACK__" "$path_url" "../conf/nginx.conf"
fi

# Create a dedicated nginx config
ynh_add_nginx_config

#===================================================
# CREATE DEDICATED USER
#===================================================
ynh_script_progression --message="Configuring system user..." --time --weight=1

# Create a system user
ynh_system_user_create $app $final_path

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

# Create a dedicated php-fpm config
ynh_add_fpm_config $php_version

#=================================================
# INSTALL AND INITIALIZE COMPOSER
#=================================================
ynh_script_progression --message="Installing Flarum with Composer..." --time --weight=1

# Create composer directory and making sure it is writable
mkdir -p "$final_path/.composer"
chown -R $app: $final_path

# Installing composer
ynh_install_composer --user=$app --phpversion=$php_version --workdir=$final_path

# Set Flarum version
ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path \
  --commands="require flarum/core:$core_version --prefer-lowest --no-update"

# Require SSOwat extension
ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path \
  --commands="require tituspijean/flarum-ext-auth-ssowat:$ssowat_version --no-update"

# Update and download dependencies
ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path \
  --commands="update"

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

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

#=================================================
# SETUP PERMISSIONS
#=================================================
ynh_script_progression --message="Configuring permissions..." --time --weight=1

# Make app public if necessary
if [ $is_public -eq 1 ]
then
  # Everyone can access the app.
  # The "main" permission is automatically created before the install script.
  ynh_permission_update --permission "main" --add "visitors"
fi

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

systemctl reload nginx

#=================================================
# FLARUM POST-INSTALL
#=================================================
ynh_script_progression --message="Configuring Flarum..." --time --weight=2

# Copy the configuration.yml to working directory
finalflarumconf="$final_path/configuration.yml"
cp ../conf/configuration.yml $finalflarumconf
chown $app: $finalflarumconf
# Generate admin password and retrieve their email address
admin_pwd=$(ynh_string_random 8)
admin_mail=$(ynh_user_get_info $admin mail)
# Populate configuration.yml
ynh_replace_string "__DOMAIN__" "$domain" "$finalflarumconf"
ynh_replace_string "/__PATH__" "$path_url" "$finalflarumconf"
ynh_replace_string "__USER__" "$app" "$finalflarumconf"
ynh_replace_string "__DB_PWD__" "$db_pwd" "$finalflarumconf"
ynh_replace_string "__ADMIN__" "$admin" "$finalflarumconf"
ynh_replace_string "__ADMIN_PWD__" "$admin_pwd" "$finalflarumconf"
ynh_replace_string "__ADMIN_EML__" "$admin_mail" "$finalflarumconf"
ynh_replace_string "__FORUM_TITLE__" "$title" "$finalflarumconf"
# Execute post-installation
pushd $final_path
  exec_as $app php$php_version -d $final_path -d memory_limit=-1 flarum install -f configuration.yml
  # Delete configuration.yml as it contains sensitive data
  ynh_secure_remove $finalflarumconf
popd

# Email setup
sql_command="REPLACE INTO \`settings\` (\`key\`, \`value\`) VALUES
  ('mail_driver', 'mail'),
  ('mail_encryption', 'ssl'),
  ('mail_from', '$app@$domain'),
  ('mail_host', 'localhost'),
  ('mail_port', '587');"
ynh_mysql_execute_as_root "$sql_command" $db_name

# Enable and set up the SSOwat auth extension
ynh_script_progression --message="Enabling and configuring SSOwat extension..." --time --weight=2
activate_flarum_extension $db_name "tituspijean-auth-ssowat"
ssowatdomain=$(</etc/yunohost/current_host)
sql_command="INSERT INTO \`settings\` (\`key\`, \`value\`) VALUES ('tituspijean-auth-ssowat.domain', '$ssowatdomain'), ('tituspijean-auth-ssowat.onlyUse', '0');"
ynh_mysql_execute_as_root "$sql_command" $db_name

# Install, activate and set language extensions
case $language in
  fr)
    ynh_script_progression --message="Installing French extension..." --time --weight=2
    ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path --commands="require milescellar/lang-french"
    activate_flarum_extension $db_name "milescellar-lang-french"
    sql_command="UPDATE \`settings\` SET \`value\` = 'fr' WHERE \`settings\`.\`key\` = 'default_locale'"
    ynh_mysql_execute_as_root "$sql_command" $db_name
    ;;
  de)
    ynh_script_progression --message="Installing German extension..." --time --weight=2
    ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path --commands="require cbmainz/flarum-de"
    activate_flarum_extension $db_name "cbmainz-de"
    sql_command="UPDATE \`settings\` SET \`value\` = 'de' WHERE \`settings\`.\`key\` = 'default_locale'"
    ynh_mysql_execute_as_root "$sql_command" $db_name
    ;;
esac

if [ $bazaar_extension -eq 1 ]; then
  ynh_script_progression --message="Installing Bazaar extension..." --time --weight=2
  ynh_composer_exec --user=$app --phpversion=$php_version --workdir=$final_path --commands="require extiverse/bazaar"
fi

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

### For security reason, any app should set the permissions to root: before anything else.
### Then, if write authorization is needed, any access should be given only to directories
### that really need such authorization.

# Set right permissions
chown -R $app:www-data $final_path

#=================================================
# SEND CREDENTIALS TO ADMIN
#=================================================

ynh_script_progression --message="Sending generated admin credentials by email, but you can log in with your YunoHost credentials!" --time --weight=1
app_message="User : $admin, password : $admin_pwd
Change your password!
Your forum is accessible at https://$domain$path_url"
ynh_send_readme_to_admin "$app_message" "$admin"
ynh_print_warn "$app_message"