#!/bin/bash

### CONFIG
YAMAHA_IP="192.168.0.50"
### END CONFIG

read_dom() {
    local IFS=\>
    read -d \< ENTITY CONTENT
}
get_volume() {
    while read_dom; do
        if [[ $ENTITY = "Val" ]]; then
            echo $CONTENT
            exit
        fi
    done < <(curl -s -X POST -d '<YAMAHA_AV cmd="GET"><Main_Zone><Basic_Status>GetParam</Basic_Status></Main_Zone></YAMAHA_AV>' http://$YAMAHA_IP/YamahaRemoteControl/ctrl)
}

volume_up() {
    set_volume "$(( $(get_volume) + 10 ))"
}

volume_down() {
    set_volume "$(( $(get_volume) - 10 ))"
}

set_volume() {
    curl -s -X POST -d "<YAMAHA_AV cmd=\"PUT\"><Main_Zone><Volume><Lvl><Val>$1</Val><Exp>1</Exp><Unit>dB</Unit></Lvl></Volume></Main_Zone></YAMAHA_AV>" http://$YAMAHA_IP/YamahaRemoteControl/ctrl
}

power_on() {
    curl -X POST -d '<YAMAHA_AV cmd="PUT"><Main_Zone><Power_Control><Power>On</Power></Power_Control></Main_Zone></YAMAHA_AV>' http://$YAMAHA_IP/YamahaRemoteControl/ctrl
}

power_off() {
    curl -X POST -d '<YAMAHA_AV cmd="PUT"><Main_Zone><Power_Control><Power>Standby</Power></Power_Control></Main_Zone></YAMAHA_AV>' http://$YAMAHA_IP/YamahaRemoteControl/ctrl
}

set_input() {
echo "dsfsd $1"
    curl -s -X POST -d "<YAMAHA_AV cmd=\"PUT\"><Main_Zone><Input><Input_Sel>HDMI$1</Input_Sel></Input></Main_Zone></YAMAHA_AV>" http://$YAMAHA_IP/YamahaRemoteControl/ctrl
}

print_help() {
    echo -e "Bash script to control Yamaha Amplituner RX-V series."
    echo -e "Usage: $0 command\n"
    echo -e "Possible commands:"
    echo -e " -volup\t\t Set volume up by 1"
    echo -e " -voldown\t Set volume down by 1"
    echo -e " -input <i>\t Set input source 1-4"
    echo -e " -on\t\t Set power on"
    echo -e " -off\t\t Set power off"
    exit 0
}

# check arguments
case "$1" in
  -on)
    power_on
    ;;
  -off)
    power_off
    ;;
  -volup)
    volume_up
    ;;
  -voldown)
    volume_down
    ;;
  -input)
    set_input "$2"
    ;;
  *)
    print_help
esac


exit 0;