#!/bin/bash

######## Actually we cant use common script in backup / restore script see this issue for more informations : https://dev.yunohost.org/issues/621
# # Import common cmd
# source ./_common.sh
#

######## We implement manually this fonctions 

init_script() {
    # Exit on command errors and treat unset variables as an error
    set -eu

    # Source YunoHost helpers
    source /usr/share/yunohost/helpers

    # Retrieve arguments
    app=$YNH_APP_INSTANCE_NAME
    CHECK_VAR "$app" "app name not set"
    GET_DEBIAN_VERSION
    
    if [ -n "$(uname -m | grep 64)" ]; then
            ARCHITECTURE="amd64"
    elif [ -n "$(uname -m | grep 86)" ]; then
            ARCHITECTURE="386"
    elif [ -n "$(uname -m | grep arm)" ]; then
            ARCHITECTURE="arm"
    else
            ynh_die "Unable to find arch"
    fi
}

install_arm_package_dep() {

    wget -q -O '/tmp/python-nacl.deb' "http://ftp.ch.debian.org/debian/pool/main/p/python-nacl/python-nacl_${python_nacl_version}_armhf.deb"

    if ([[ ! -e '/tmp/python-nacl.deb' ]] || [[ $(md5sum '/tmp/python-nacl.deb' | cut -d' ' -f1) != $md5sum_python_nacl ]]) && \
        ([[ ! -e '/tmp/python-ujson.deb' ]] || [[ $(md5sum '/tmp/python-ujson.deb' | cut -d' ' -f1) != $md5sum_python_ujson ]])
    then
        ynh_die "Error : can't get debian dependance package"
    fi
    
    sudo dpkg -i /tmp/python-nacl.deb
    sudo dpkg -i /tmp/python-ujson.deb
}

GET_DEBIAN_VERSION() {
    debian_version=$(sudo lsb_release -sc)
    test -z $debian_version && ynh_die "Can't find debian version"
    test $debian_version == 'jessie' || ynh_die "This package is not available for your debian version"
}

enable_backport_repos() {
    if [[ -z "$(grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list ; grep -e "^deb .*/.* $debian_version-backports main" /etc/apt/sources.list.d/*)" ]]
    then
        echo "deb $(grep -m 1 "^deb .* $debian_version .*main" /etc/apt/sources.list | cut -d ' ' -f2) $debian_version-backports main contrib non-free" | sudo tee -a "/etc/apt/sources.list"
    fi
    ynh_package_update
}

CHECK_VAR () {	# Vérifie que la variable n'est pas vide.
# $1 = Variable à vérifier
# $2 = Texte à afficher en cas d'erreur
	test -n "$1" || (echo "$2" >&2 && false)
}

######## End of common fonctions

# Init script
init_script

# Retrieve arguments
domain=$(ynh_app_setting_get $app domain)
synapse_port=$(ynh_app_setting_get $app synapse_port)
synapse_tls_port=$(ynh_app_setting_get $app synapse_tls_port)
turnserver_port=$(ynh_app_setting_get $app turnserver_port)
turnserver_tls_port=$(ynh_app_setting_get $app turnserver_tls_port)

# Restore Nginx
conf=/etc/nginx/conf.d/$domain.d/$app.conf
if [ -f $conf ]; then
    ynh_die "There is already a nginx conf file at this path: $conf"
fi
sudo cp -a ./nginx.conf "/etc/nginx/conf.d/${domain}.d/${app}.conf"

# Make dh cert for synapse if it not exist
test ! -e /etc/yunohost/certs/$domain/dh.pem && sudo openssl dhparam -out /etc/yunohost/certs/$domain/dh.pem 2048 > /dev/null

# Get Matrix key repos
wget -q -O '/tmp/matrix-repo-key.asc' "https://matrix.org/packages/debian/repo-key.asc"
sudo apt-key add "/tmp/matrix-repo-key.asc"

echo "matrix-synapse matrix-synapse/server-name select $domain" | sudo debconf-set-selections # Configure dpkg for no questions
echo "matrix-synapse matrix-synapse/report-stats select false" | sudo debconf-set-selections # Configure dpkg for no questions

# Enable debian-backports repos
enable_backport_repos

# Install coturn (the turn server)
ynh_package_install coturn

# Enable Synapse repos
if [[ -n "$(uname -m | grep arm)" ]]
then
        # Use special conf for arm arch because some binary are not available in jessie backport or in matrix repos
        install_arm_package_dep
        ynh_package_install -t $debian_version-backports -f
        echo "deb [arch=i386] http://matrix.org/packages/debian/ $debian_version main" | sudo tee -a "/etc/apt/sources.list.d/matrix.list"
        ynh_package_update
else
        echo "deb http://matrix.org/packages/debian/ $debian_version main" | sudo tee -a "/etc/apt/sources.list.d/matrix.list"
        ynh_package_update
fi

# Install synapse package
# We neet to install python-cryptography to Solve a python error about dependance (from cryptography.hazmat.primitives.asymmetric.utils)
ynh_package_install -t $debian_version-backports matrix-synapse python-matrix-synapse-ldap3 python-cryptography

# Restaure la configuration de logrotate
sudo cp -a ./logrotate /etc/logrotate.d/$app

# Restore synapse config
sudo cp -a ./synapse_config/. "/etc/matrix-synapse/."

# Restore coturn server
sudo cp -a ./coturn_config "/etc/turnserver.conf"

# Restore synapse database
sudo cp -a ./data/. "/var/lib/matrix-synapse/."

# Configure access for certificates
sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/crt.pem
sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/key.pem
sudo setfacl -m user:matrix-synapse:r /etc/yunohost/certs/$domain/dh.pem

sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/crt.pem
sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/key.pem
sudo setfacl -m user:turnserver:r /etc/yunohost/certs/$domain/dh.pem

# Ouvre le port dans le firewall
sudo yunohost firewall allow --no-upnp TCP $synapse_tls_port > /dev/null 2>&1
sudo yunohost firewall allow --no-upnp Both $turnserver_port > /dev/null 2>&1
sudo yunohost firewall allow --no-upnp Both $turnserver_tls_port > /dev/null 2>&1

# Régénère la configuration de SSOwat
sudo yunohost app ssowatconf

# Reload webserver
sudo service nginx reload
sudo service matrix-synapse restart
sudo service coturn restart