#!/bin/sh

# Copyright (c) 2018-2022 Codenotary, Inc. All Rights Reserved.
# This software is released under Apache License 2.0.
# The full license information can be found under:
# https://www.apache.org/licenses/LICENSE-2.0


set -e

version_string=$(curl -sL https://api.github.com/repos/codenotary/cas/releases/latest | awk '/tag_name/ {gsub(/"/,""); gsub(/,/,""); print $2}')
base_url=https://github.com/codenotary/cas/releases/latest/download
echo "Latest available release for cas is: $version_string"
linux_file="$base_url/cas-$version_string-linux-amd64-static"
windows_file="$base_url/cas-version_string-windows-amd64.exe"
mac_file="$base_url/cas-$version_string-darwin-amd64"
os_name=$(uname -s)

case "${os_name}" in
    Linux*)     target=$linux_file;;
    Darwin*)    target=$mac_file;;
    FreeBSD*)    target=$linux_file;;
    CYGWIN*)    target="$windows_file" && out=".exe";;
    MINGW*)     target="$windows_file" && out=".exe";;
    *)          echo "Unsupported runner OS, aborting CAS Download" && exit 1;;
esac

http_code=$(curl -s -L  "$target" -o cas -w "%{http_code}\n")
echo "Downloading cas..."

if [[ "$http_code" -ne 200 ]]; then
    echo -en "Server responded with $http_code, please visit our releases page to manually download at https://github.com/codenotary/cas/releases\n"
    rm -f cas
    exit 2
fi
chmod +x ./cas


user_bin="$HOME/.local/bin"
case $PATH in
    *:"$user_bin":* | "$user_bin":* | *:"$user_bin")
        default_bin=$user_bin
        ;;
    *)
        default_bin='/usr/local/bin'
        ;;
esac

printf "Install location [default: %s]: " "$default_bin"
read -r bindir < /dev/tty
bindir=${bindir:-$default_bin}

while ! test -d "$bindir"; do
    echo "Directory $bindir does not exist"
    printf "Install location [default: %s]: " "$default_bin"
    read -r bindir < /dev/tty
    bindir=${bindir:-$default_bin}
done

if test -w "$bindir"; then
    mv cas "$bindir/"
else
    echo "Using SUDO to install $bindir/cas"
    sudo mv cas "$bindir/"
fi

echo "$("$bindir"/cas --version | head -1) has been installed to:"
echo " • $bindir/cas"
echo ""
echo -en "🎉Done \n\nYou can now use the community attestation service (https://cas.codenotary.com) by running: $ cas\n\n"
echo -en "To get started set your API key you received by email and login: $ export CAS_API_KEY=<your API_KEY>; cas login\n\n"
echo -en "You can find the online documentation here: https://github.com/codenotary/cas\n\n"