#!/usr/bin/env bash

# Color makes everything nicer
COLOR_GREEN="\033[0;32m"
COLOR_ORANGE="\033[0;33m"
COLOR_PURPLE_LIGHT="\033[1;35m"
FORMAT_BOLD="\033[1m"
FORMAT_UNDERLINE="\033[4m"
FORMAT_END="\033[0m"

echo -e "\n${FORMAT_BOLD}${FORMAT_UNDERLINE}${COLOR_PURPLE_LIGHT}Installing jinx:${FORMAT_END}\n"

# Relevant installation files and folders
JINX_TMP="/tmp/jinx"
JINX_ETC="/usr/local/etc/jinx"
JINX_BIN="/usr/local/bin/jinx"

# Grab the relevant tarball
JINX_RELEASE_URL="https://api.github.com/repos/pretzelhands/jinx/releases/latest"
JINX_TARBALL=$(curl -sq ${JINX_RELEASE_URL} | awk -F\" '/"tarball_url"/ {print $4;}')

# Detect system variables
OSTYPE=$(uname -s | tr '[:upper:]' '[:lower:]')

echo -n "Checking requirements... "

if [[ "$OSTYPE" == "darwin"* ]] && [[ ! -f "/usr/local/bin/gsed" ]]
then
    echo -e "\n\n${COLOR_ORANGE}Hold up! It looks like you're missing GNU sed.${FORMAT_END}"
    echo -e "Please install GNU sed and try again:\n"
    echo -e "    ${FORMAT_BOLD}brew install gnu-sed --with-default-names${FORMAT_END}\n"

    exit 1
fi

echo -e "${COLOR_GREEN}done.${FORMAT_END}"

# Backup in case an existing jinx installation is there
[ -d "$JINX_ETC" ] && mv $JINX_ETC "$JINX_ETC.backup.$JINX_VERSION"
[ -f "$JINX_BIN" ] && mv $JINX_BIN "$JINX_BIN.backup.$JINX_VERSION"

# Prepare temporary directory
mkdir -p $JINX_TMP/unpacked

# Create directory for module and helper scripts
mkdir -p $JINX_ETC/helpers
mkdir -p $JINX_ETC/modules

# Fetch the tarball
echo -n "Grabbing latest tarball from GitHub... "
curl -L "$JINX_TARBALL" -o "$JINX_TMP/jinx.tar.gz" --silent
tar xzf "$JINX_TMP/jinx.tar.gz" -C "$JINX_TMP/unpacked" --strip-components 1
echo -e "${COLOR_GREEN}done.${FORMAT_END}"

# Move everything to where it belongs
echo -n "Installing files... "
mv "$JINX_TMP/unpacked/jinx" "$JINX_BIN"
mv "$JINX_TMP/unpacked/helpers" "$JINX_ETC"
mv "$JINX_TMP/unpacked/modules" "$JINX_ETC"

# Make the script executable
chmod a+x "$JINX_BIN"
echo -e "${COLOR_GREEN}done.${FORMAT_END}"

# Always clean up behind yourself
echo -n "Cleaning up... "
rm -r $JINX_TMP
echo -e "${COLOR_GREEN}done.${FORMAT_END}"

echo -e "\n${FORMAT_BOLD}${COLOR_PURPLE_LIGHT}All done!${FORMAT_END} jinx is now ready to use.\n"