#!/bin/bash

# Retrieve arguments
app=$YNH_APP_INSTANCE_NAME
synapse_user="matrix-synapse"
synapse_db_name="matrix_synapse"
synapse_db_user="matrix_synapse"

get_app_version_from_json() {
   manifest_path="../manifest.json"
    if [ ! -e "$manifest_path" ]; then
    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
    fi
    echo $(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
}
APP_VERSION=$(get_app_version_from_json)

install_dependances() {
	ynh_install_app_dependencies coturn build-essential python2.7-dev libffi-dev python-pip python-setuptools sqlite3 libssl-dev python-virtualenv libxml2-dev libxslt1-dev python-lxml libjpeg-dev libpq-dev postgresql acl
	pip install --upgrade pip
	pip install --upgrade virtualenv
}

setup_dir() {
    # Create empty dir for synapse
    mkdir -p /var/lib/matrix-synapse
    mkdir -p /var/log/matrix-synapse
    mkdir -p /var/log/turnserver
    mkdir -p /etc/matrix-synapse/conf.d
    mkdir -p $final_path
}

install_source() {
	if [ -n "$(uname -m | grep arm)" ]
	then
		ynh_replace_string __APP_VERSION__ $APP_VERSION "$YNH_CWD/../conf/armv7.src"
		ynh_setup_source $final_path/ "armv7"
	else
		# Install virtualenv if it don't exist
		test -e $final_path/bin || virtualenv -p python2.7 $final_path

		# Install synapse in virtualenv
		PS1=""
		cp ../conf/virtualenv_activate $final_path/bin/activate
		source $final_path/bin/activate
		pip install --upgrade pip
		pip install --upgrade setuptools
		pip install --upgrade cffi ndg-httpsclient psycopg2 lxml
		pip install --upgrade https://github.com/matrix-org/synapse/archive/v$APP_VERSION.tar.gz
		deactivate
	fi

    # Set permission
    chown $synapse_user:root -R $final_path
    chown $synapse_user:root -R /var/lib/matrix-synapse
    chown $synapse_user:root -R /var/log/matrix-synapse
    chown turnserver:root -R /var/log/turnserver
    chown $synapse_user:root -R /etc/matrix-synapse
}

config_nginx() {
	cp ../conf/nginx.conf /etc/nginx/conf.d/$domain.d/$app.conf

	ynh_replace_string __PATH__ $path /etc/nginx/conf.d/$domain.d/$app.conf
	ynh_replace_string __PORT__ $synapse_port /etc/nginx/conf.d/$domain.d/$app.conf
	
	systemctl reload nginx.service
}

config_synapse() {
	cp ../conf/homeserver.yaml /etc/matrix-synapse/homeserver.yaml
	cp ../conf/log.yaml /etc/matrix-synapse/log.yaml
	
	ynh_replace_string __DOMAIN__ $domain /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __SYNAPSE_DB_USER__ $synapse_db_user /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __SYNAPSE_DB_PWD__ $synapse_db_pwd /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __PORT__ $synapse_port /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __TLS_PORT__ $synapse_tls_port /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __TURNSERVER_TLS_PORT__ $turnserver_tls_port /etc/matrix-synapse/homeserver.yaml
	ynh_replace_string __TURNPWD__ $turnserver_pwd /etc/matrix-synapse/homeserver.yaml

	if [ "$is_public" = "0" ]
	then
		ynh_replace_string __ALLOWED_ACCESS__ False /etc/matrix-synapse/homeserver.yaml
	else
		ynh_replace_string __ALLOWED_ACCESS__ True /etc/matrix-synapse/homeserver.yaml
	fi
}

config_coturn() {
	cp ../conf/default_coturn /etc/default/coturn
	cp ../conf/turnserver.conf /etc/turnserver.conf
	
	ynh_replace_string __TURNPWD__ $turnserver_pwd /etc/turnserver.conf
	ynh_replace_string __DOMAIN__ $domain /etc/turnserver.conf
	ynh_replace_string __TLS_PORT__ $turnserver_tls_port /etc/turnserver.conf
}

set_certificat_access() {
	set_access $synapse_user /etc/yunohost/certs/$domain/crt.pem
	set_access $synapse_user /etc/yunohost/certs/$domain/key.pem
	set_access $synapse_user /etc/yunohost/certs/$domain/dh.pem

	set_access turnserver /etc/yunohost/certs/$domain/crt.pem
	set_access turnserver /etc/yunohost/certs/$domain/key.pem
	set_access turnserver /etc/yunohost/certs/$domain/dh.pem
}

set_access() { # example : set_access USER FILE
    user="$1"
    file_to_set="$2"
    while [[ 0 ]]
    do
        path_to_set=""
        oldIFS="$IFS"
        IFS="/"
        for dirname in $file_to_set
        do
            if [[ -n "$dirname" ]]
            then
                test -f "$path_to_set"/"$dirname" && setfacl -m d:u:$user:r "$path_to_set"
                
                path_to_set="$path_to_set/$dirname"
                
                if $(sudo -u $user test ! -r "$path_to_set")
                then
                    test -d "$path_to_set" && setfacl -m user:$user:rx  "$path_to_set"
                    test -f "$path_to_set" && setfacl -m user:$user:r  "$path_to_set"
                fi
            fi
        done
        IFS="$oldIFS"
        
        if $(test -L "$file_to_set")
        then
            if [[ -n "$(readlink "$file_to_set" | grep -e "^/")" ]]
            then
                file_to_set=$(readlink "$file_to_set") # If it is an absolute path
            else
                file_to_set=$(realpath -s -m "$(echo "$file_to_set" | cut -d'/' -f-$(echo "$file_to_set" | grep -o '/' | wc -l))/$(readlink "$file_to_set")") # If it is an relative path (we get with realpath the absolute path)
            fi
        else
            break
        fi
    done
}


####### Solve issue https://dev.yunohost.org/issues/1006

# Install package(s)
#
# usage: ynh_package_install name [name [...]]
# | arg: name - the package name to install
ynh_package_try_install() {
    ynh_apt -o Dpkg::Options::=--force-confdef \
            -o Dpkg::Options::=--force-confold install $@
}


# Build and install a package from an equivs control file
#
# example: generate an empty control file with `equivs-control`, adjust its
#          content and use helper to build and install the package:
#              ynh_package_install_from_equivs /path/to/controlfile
#
# usage: ynh_package_install_from_equivs controlfile
# | arg: controlfile - path of the equivs control file
ynh_package_install_from_equivs () {
    controlfile=$1

    # Check if the equivs package is installed. Or install it.
    ynh_package_is_installed 'equivs' \
        || ynh_package_install equivs

    # retrieve package information
    pkgname=$(grep '^Package: ' $controlfile | cut -d' ' -f 2)	# Retrieve the name of the debian package
    pkgversion=$(grep '^Version: ' $controlfile | cut -d' ' -f 2)	# And its version number
    [[ -z "$pkgname" || -z "$pkgversion" ]] \
        && echo "Invalid control file" && exit 1	# Check if this 2 variables aren't empty.

    # Update packages cache
    ynh_package_update

    # Build and install the package
    TMPDIR=$(mktemp -d)
    # Note that the cd executes into a sub shell
    # Create a fake deb package with equivs-build and the given control file
    # Install the fake package without its dependencies with dpkg
    # Install missing dependencies with ynh_package_install
    (cp "$controlfile" "${TMPDIR}/control" && cd "$TMPDIR" \
     && equivs-build ./control 1>/dev/null \
     && sudo dpkg --force-depends \
          -i "./${pkgname}_${pkgversion}_all.deb" 2>&1 \
     && ynh_package_try_install -f)
    [[ -n "$TMPDIR" ]] && rm -rf $TMPDIR	# Remove the temp dir.

    # check if the package is actually installed
    ynh_package_is_installed "$pkgname"
}

# Define and install dependencies with a equivs control file
# This helper can/should only be called once per app
#
# usage: ynh_install_app_dependencies dep [dep [...]]
# | arg: dep - the package name to install in dependence
ynh_install_app_dependencies () {
    dependencies=$@
    manifest_path="../manifest.json"
    if [ ! -e "$manifest_path" ]; then
    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
    fi
    version=$(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)	# Retrieve the version number in the manifest file.
    dep_app=${app//_/-}	# Replace all '_' by '-'

    if ynh_package_is_installed "${dep_app}-ynh-deps"; then
		echo "A package named ${dep_app}-ynh-deps is already installed" >&2
    else
        cat > /tmp/${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
Section: misc
Priority: optional
Package: ${dep_app}-ynh-deps
Version: ${version}
Depends: ${dependencies// /, }
Architecture: all
Description: Fake package for ${app} (YunoHost app) dependencies
 This meta-package is only responsible of installing its dependencies.
EOF
        ynh_package_install_from_equivs /tmp/${dep_app}-ynh-deps.control \
            || (ynh_package_autopurge; ynh_die "Unable to install dependencies")	# Install the fake package and its dependencies
        rm /tmp/${dep_app}-ynh-deps.control
        ynh_app_setting_set $app apt_dependencies $dependencies
    fi
}