#!/bin/sh

# sh-compatible version of Tridactyl native binary updater
# Python 3 is required. If it is not present, installation will fail.

# Installation:
#   curl -fsSl 'url to this script' | sh
# or:
#   wget -qO - 'url to this script' | sh

# Handle errors (bash only)
echoerr() {
    red="\033[31m"
    normal="\e[0m"
    echo -e "$red$@$normal" >&2
}
trap "echoerr 'Failed to install!'" ERR >/dev/null 2>&1 #can't trap ERR in sh

# Check requirements for native messenger
python_path=$(which python3) || python_path=""
if [ ! -x "$python_path" ]; then
    echoerr "Error: Python 3 must exist in PATH."
    echoerr "Please install it and run this script again."
    exit 1
fi

# Set up environment
manifest_loc="https://raw.githubusercontent.com/cmcaine/tridactyl/master/native/tridactyl.json"
native_loc="https://raw.githubusercontent.com/cmcaine/tridactyl/master/native/native_main.py"
OSTYPE="${OSTYPE:-`uname -s | tr '[:upper:]' '[:lower:]'`}"
XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
data_home="${XDG_LOCAL_HOME:-$XDG_DATA_HOME/tridactyl}"
native_file="$data_home/native_main.py.new"
native_file_final="$data_home/native_main.py"
# Decide where to put the manifest based on OS
case "$OSTYPE" in
    darwin*) manifest_home="$HOME/Library/Application Support/Mozilla/NativeMessagingHosts";;
    *)       manifest_home="$HOME/.mozilla/native-messaging-hosts";;
esac
manifest_file="$manifest_home/tridactyl.json"
# Test for curl
if ! command -v curl; then
    # Based on busybox-compatible wget
    dl="wget -qO"
else
    dl="curl -sSo"
fi

echo "Installing script here: $data_home"
echo "Installing manifest here: $manifest_home"

# Download files
mkdir -p "$manifest_home" "$data_home"
# Use local copy for testing and/or use in git repo
if [ "$1" == "local" ]; then
    cp -f native/tridactyl.json "$manifest_file"
    cp -f native/native_main.py "$native_file"
else
    $dl "$manifest_file" "$manifest_loc"
    $dl "$native_file" "$native_loc"
fi

# Fix file contents
sedEscape() {
    sed 's/[&/\]/\\&/g' <<_EOF_
$@
_EOF_
}
# Replace native executable path in manifest
sed -i.bak "s/REPLACE_ME_WITH_SED/$(sedEscape "$native_file_final")/" "$manifest_file"
chmod +x $native_file
# Replace python shebang in native messenger script
sed -i.bak "1s/.*/#!$(sedEscape /usr/bin/env) $(sedEscape "$python_path")/" "$native_file"
mv "$native_file" "$native_file_final"

echo
echo "Successfully installed Tridactyl native messenger!"
echo "Run ':native' in Firefox to check."