#!/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 "Installing $toolName via apt"; }
step_1_alias() { ALIAS="install"; }
step_1() {
  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..."
  raspi-config
  saveReturn $?
  endReturn
}

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


step_4_info() { echo "Create systemd service"; }
step_4() {
  if [ -f "$toolServiceFile" ] ; then
    mv "$toolServiceFile" "$toolServiceFile".bck
    echo -e "\n[WARN] existing service file renamed to $toolServiceFile.bck"
  fi
  echo "$toolServiceContent" > "$toolServiceFile"

  systemctl daemon reload
  systemctl enable kodi.service
  saveReturn $?
  endReturn
}

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 "Enabling text input for USB keyboards within $toolName"; }
step_5() {
  local udevFile="/etc/udev/rules.d/99-kodi.rules"
  local inputRule="KERNEL==\"tty[0-9]*\", GROUP=\"tty\", MODE=\"0660\""
  if [ -f "$udevFile" ] ; then
    echo "udev rule ($udevFile) already exists."
  else
    echo "inputRule" >> udevFile
  fi
}

step_6_info() { "Increase raspberry pi GPU memory to 320"; }
step_6() {
  local rpiBootConfig="/boot/config.txt"
  echo "
  # Modifications for $toolName
  start_x=1
  gpu_mem=320" >> $rpiBootConfig 
}

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 "To start $toolName anyway enter:"
      echo "service start kodi"
      ;;
  esac
}

VERSION_SEQREV=2
. sequencer.sh