#!/bin/bash -e

COLOR_RED=`tput setaf 1`
COLOR_GREEN=`tput setaf 2`
COLOR_YELLOW=`tput setaf 3`
COLOR_BLUE=`tput setaf 4`
COLOR_RESET=`tput sgr0`

trap 'handleError' ERR

handleError() {
  cat <<EOT

Leider ist ein Fehler aufgetreten.

Bitte hilf mit dieses Skript zu verbessern und sende einen
Fehlerbericht per EMail an installer@logseq.eu
EOT
}

showLogo() {
  echo -n "${COLOR_GREEN}"
  cat <<-'EOT'
	.____
	|    |    ____   ____  ______ ____  ______
	|    |   /  _ \ / ___\/  ___// __ \/ ____/
	|    |__(  <_> ) /_/  >___ \\  ___< <_|  |
	|_______ \____/\___  /____  >\___  >__   |
	        \/    /_____/     \/     \/   |__|
	EOT

  echo -n "${COLOR_YELLOW}"
  cat <<-'EOT'
	.___                 __         .__  .__
	|   | ____   _______/  |______  |  | |  |   ___________
	|   |/    \ /  ___/\   __\__  \ |  | |  | _/ __ \_  __ \
	|   |   |  \\___ \  |  |  / __ \|  |_|  |_\  ___/|  | \/
	|___|___|  /____  > |__| (____  /____/____/\___  >__|
	         \/     \/            \/               \/


	EOT
  echo -n "${COLOR_RESET}"
}

getVersionLatest() {
  VERSION_LATEST="$( wget -qO - https://github.com/logseq/logseq/releases/latest | grep -Poi "Logseq-linux-x64-\K\d\.\d\.\d" | head -n 1 )"
}

getVersionCurrent() {
  local FILENAME="$( find ~/.local/bin/ -iname Logseq-\*AppImage )"
  if [ -n "$FILENAME" ]; then
    VERSION_CURRENT="$( echo $FILENAME | grep -Poi "Logseq-linux-x64-\K\d\.\d\.\d" | head -n 1 )"
  else
    VERSION_CURRENT=
  fi
}

getLatest() {
  local URL="https://github.com$( wget -qO - https://github.com/logseq/logseq/releases/latest | grep -Poi "/logseq.*AppImage" )"
  local DIR_DEST=~/.local/bin

  FILENAME_LOGSEQ="$( basename "$URL" )"
  mkdir -p $DIR_DEST
  wget $URL --show-progress -qO $DIR_DEST/$FILENAME_LOGSEQ
  chmod u+x $DIR_DEST/$FILENAME_LOGSEQ
}

createDesktop() {
  local FILE_PNG=${HOME}/.local/share/applications/logseq.png
  [ -e $FILE_PNG ] || wget https://raw.githubusercontent.com/logseq/logseq/master/resources/icons/logseq.png -qO $FILE_PNG

  cat > ~/.local/share/applications/logseq.desktop <<-EOF
	[Desktop Entry]
	Encoding=UTF-8
	Name=Logseq
	Comment=Wissensmanagement mit Logseq
	Exec=${HOME}/.local/bin/$FILENAME_LOGSEQ
	Icon=${HOME}/.local/share/applications/logseq.png
	Type=Application
	Categories=Office;
	X-GNOME-SingleWindow=true
	SingleMainWindow=true
	EOF

	update-desktop-database ~/.local/share/applications
}

showLogo
getVersionLatest
getVersionCurrent
echo "Neuste verfügbare Version...... $COLOR_GREEN$VERSION_LATEST$COLOR_RESET"
echo "Derzeit installierte Version... $COLOR_GREEN${VERSION_CURRENT:-${COLOR_RED}Keine installiert}$COLOR_RESET"

[ "$VERSION_CURRENT" != "$VERSION_LATEST" ] || exit

echo "Logseq Download gestartet"
getLatest
createDesktop
echo "Logseq wurde installiert"