#!/bin/bash

CONFIG_FILE=$SNAP_DATA/config_options

function get_app_to_run()
{
    # Use a default in case config file doesn't exist
    local app=photoviewer
    if [ -e ${CONFIG_FILE} ]; then
        app=$(grep app ${CONFIG_FILE} | cut -d'=' -f2)
    fi

    echo ${app}
}

if [ "$SNAP_ARCH" == "amd64" ]; then
    ARCH="x86_64-linux-gnu"
elif [ "$SNAP_ARCH" == "armhf" ]; then
    ARCH="arm-linux-gnueabihf"
elif [ "$SNAP_ARCH" == "arm64" ]; then
    ARCH="aarch64-linux-gnu"
else
    ARCH="$SNAP_ARCH-linux-gnu"
fi

export MIR_LIBS=${SNAP}/mir-libs/$ARCH
if [ ! -d ${MIR_LIBS} ] ; then
    echo "####################################################################"
    echo "ERROR: It appears ${SNAP_NAME}:mir-libs plug has not been connected."
    echo "Please run:"
    echo ""
    echo "    snap install mir-libs --edge"
    echo "    snap connect ${SNAP_NAME}:mir-libs mir-libs:mir-libs"
    echo "    snap disable ${SNAP_NAME}"
    echo "    sudo /usr/lib/snapd/snap-discard-ns ${SNAP_NAME}"
    echo "    snap enable ${SNAP_NAME}"
    echo ""
    echo "###################################################################"
    exit 1
fi

# XKB config
export XKB_CONFIG_ROOT=${SNAP}/usr/share/X11/xkb

# Qt Platform to Mir
export QT_QPA_PLATFORM=ubuntumirclient
export QTCHOOSER_NO_GLOBAL_DIR=1
export QT_SELECT=snappy-qt5

# Qt Modules
export QT_PLUGIN_PATH=${SNAP}/usr/lib/$ARCH/qt5/plugins
export QML2_IMPORT_PATH=${SNAP}/usr/lib/$ARCH/qt5/qml

# XDG Config
export XDG_CONFIG_DIRS=${SNAP}/etc/xdg:$XDG_CONFIG_DIRS
export XDG_DATA_DIRS=${SNAP}/usr/share:$XDG_DATA_DIRS

# Needed for fontconfig
export XDG_DATA_HOME=${SNAP}/usr/share
export FONTCONFIG_PATH=${SNAP}/etc/fonts/conf.d
export FONTCONFIG_FILE=${SNAP}/etc/fonts/fonts.conf

# Mesa libs
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${MIR_LIBS}/mesa-egl

# Mir config
export MIR_SOCKET=/run/mir_socket
export MIR_CLIENT_PLATFORM_PATH=${MIR_LIBS}/mir/client-platform
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:${MIR_LIBS}

while true; do

    app_to_run=$(get_app_to_run)

    echo "Running ${app_to_run}"
    $SNAP/apps/${app_to_run} &
    app_pid=$!

    # Config file should exist but let's make sure
    # otherwise, inotifywait will exit immediately and loop will
    # keep restarting server
    if [ -e "${CONFIG_FILE}" ]; then