#!/bin/bash

## Installing kodi on a raspberry pi
## Some measures are taken to prevent corrupting existing files
## but it's intendet use is for a blank rasperry pi.

toolName="Kodi"
toolUser="kodi"
toolServiceFile="/etc/systemd/system/kodi.service"

step_1_info() { echo "Install $toolName via apt"; }
step_1_alias() { ALIAS="install"; }
step_1() {
  exe apt update && apt install kodi
}

step_2_info() { echo "Set localisation and keyboard layout"; }
step_2() {
  echo "Goto \"Localisation Options\" in the following menu."
  read -p "Press ENTER to continue..."
  exe raspi-config
  saveReturn $?
  endReturn
}

step_3_info() { echo "Add $toolName user ($toolUser)"; }
step_3() {
  exep "id -u $toolUser >>/dev/null 2>&1"
  if [ $? -eq 0 ] ; then
    echo
    echo "User $toolUser exists."
    echo "Skipping user creation."
    return 0
  fi
  exe adduser \
    --disable-password \
    --gecos "User to run $toolName Media Center" \
    -G audio,video,plugdev,input,tty \
    $toolUser
  saveReturn $?
  endReturn
  echo "User $toolUser details:"
  exe id $tooLuser
}


step_4_info() { echo "Create systemd service"; }
step_4() {
  addConf -c "$toolServiceContent" "$toolServiceFile"

  if [ $? -eq 0 ] ; then
    exe systemctl daemon reload
    exe systemctl enable kodi.service
    saveReturn $?
    endReturn
  else
    echo "[ERROR] failed to setup systemd service"
  fi
}

toolServiceContent="\
[Unit]
Description = Kodi Media Center

# if you don't need the MySQL DB backend, this should be sufficient
After = systemd-user-sessions.service network.target sound.target

# if you need the MySQL DB backend, use this block instead of the previous
# After = systemd-user-sessions.service network.target sound.target mysql.service
# Wants = mysql.service

[Service]
User = kodi
Group = kodi
Type = simple
ExecStart = /usr/bin/kodi-standalone
Restart = always
RestartSec = 15

[Install]
WantedBy = multi-user.target" 

step_5_info() { echo "Enable text input for USB keyboards within $toolName"; }
step_5() {
  local udevFile="/etc/udev/rules.d/99-kodi.rules"
  local inputRule="KERNEL==\"tty[0-9]*\", GROUP=\"tty\", MODE=\"0660\""

  addConf -c "$inputRule" "$udevFile"
}

step_6_info() { echo "Increase raspberry pi GPU memory to 320"; }
step_6() {
  exep "grep -e '^[ ]*gpu_mem' \"$bootConfigLoc\" >>/dev/null 2>&1"
  if [ $? -ne 0 ] && [ -f "$bootConfigLoc" ] ; then
    # attach settings to raspberry boot configuration
    exe mount -o remount,rw /boot
    addConf -a "$bootConfig" "$bootConfigLoc"
    exe mount -o remount,ro /boot
  else
    # add to missing conf
    addConf -m "$bootConfig" "$bootConfigLoc"
  fi
}

bootConfigLoc="/boot/config.txt"
bootConfig="
# Modifications for $toolName
start_x=1
gpu_mem=320" 

step_7_info() { echo "Reboot is needed for all changes to take effect"; }
step_7() {
  if [ $QUIET -eq "1" ] ; then
    answer=n
  else
    read -p "Reboot now? y/n(default)" answer
  fi
  case $answer in
    y|Y)
      reboot
      ;;
    *)
      echo
      echo "Start $toolName manually:"
      echo "service kodi start"
      ;;
  esac
}

VERSION_SEQREV=4
. sequencer.sh