#!/usr/bin/env zsh
set -e

if [[ "$ZSH_NAME" == "" ]]; then
  echo -e "\x1b[0;31mThe installer expects ZSH to be the executing shell, lmao.\x1b[0m"
  exit 1
fi

__filename="$(realpath "$0")"
__dirname="$(dirname "$__filename")"

if [[ "$TARGET" != "" ]]; then
  true; # no-op
elif [[ "$SYSROOT_PREFIX" != "" ]]; then
  TARGET="$SYSROOT_PREFIX/usr/share/zsh/plugins/zuwu"
elif [[ "$PREFIX" != "" ]]; then
  TARGET="$PREFIX/share/zsh/plugins/zuwu"
elif [[ "$(whoami)" == "root" ]]; then
  TARGET="/usr/local/share/zsh/plugins/zuwu"
else
  TARGET="$HOME/.local/share/zsh/plugins/zuwu"
fi
mkdir -p "$TARGET"

installFile() {
  mkdir -p "$(dirname "$TARGET/$1")"
  if [[ "$(basename "$__filename")" == "zsh" ]]; then
    (curl -fsSLo "$TARGET/$1" "https://git.estrogen.zone/zuwu.git/plain/$1?h=${REF:-master}" && ! grep 'Repository seems to be empty' "$TARGET/$1") || curl -fsSLo "$TARGET/$1" "https://raw.githubusercontent.com/dmpmem/zuwu/${REF:-"master"}/$1"
  else
    cp -r "$__dirname/$1" "$TARGET/$1"
  fi
}
installFile COPYING
installFile zuwu.zsh
installFile env.zsh

<<EOF_SETUPSCRIPT > "$TARGET/setup.zsh"
#!/usr/bin/env zsh
if [[ -f "\$HOME/.zshrc" ]]; then
  local NEWZSHRC="\$HOME/.zshrc.\$(date -u +%Y-%m-%dT%H:%M:%S%Z)"
  echo -e "\x1b[0;33mExitsing zshrc found, moving to \x1b[0;34m\$NEWZSHRC\x1b[0m"
  mv "\$HOME/.zshrc" "\$NEWZSHRC"
fi
<<EOF_ZSHRC > "\$HOME/.zshrc"
for d in /usr/share/zsh/plugins/zuwu /usr/local/share/zsh/plugins/zuwu "\\\$HOME/.local/share/zsh/plugins/zuwu"; do
  if [[ -d "\\\$d" ]]; then
    source "\\\$d/zuwu.zsh"
    # For debugging, calling _ZUWU_DETECTED_INSTALL_PATH=/dev/null zsh -c 'source ~/.zshrc && echo "\\\$_ZUWU_DETECTED_INSTALL_PATH"' may be useful
    if [[ "\\\$_ZUWU_DETECTED_INSTALL_PATH" != "" ]]; then
      _ZUWU_DETECTED_INSTALL_PATH="\\\$d"
    fi
    break
  fi
done
EOF_ZSHRC
echo -e "\x1b[0;32mPlease run \x1b[0;34msource \$HOME/.zshrc\x1b[0;32m to load zuwu into the current shell.\x1b[0m"
EOF_SETUPSCRIPT
chmod +x "$TARGET/setup.zsh"
if [[ "$_ZUWU_INSTALLED" != "1" ]] || ! [[ -f "$HOME/.zshrc" ]]; then
  echo -e "\x1b[0;32mPlease run \x1b[0;34m$TARGET/setup.zsh\x1b[0;32m to install zuwu for the current user.\x1b[0m"
else
  echo -e "\x1b[0;32mPlease run \x1b[0;34msource $HOME/.zshrc\x1b[0;32m to finish updating zuwu.\x1b[0m"
fi