#!/usr/bin/env bash

# install location
LOCATION=/usr/local/bin

# exit top level program from subshell
trap "exit 1" TERM
export TOP_PID=$$
function fail() {
   kill -s TERM $TOP_PID
}

# platform IDs
LIN=linux
MAC=macos
WIN=windows

# returns this platform ID
function get_this_platform() {
    local this_platform="$(uname -s)"
    case $this_platform in
        Linux*) echo $LIN ;;
        Darwin*) echo $MAC ;;
        *)
            echo "Error: Unsupported platform $this_platform" >&2
            fail
        ;;
    esac
}

# actually sets this platform
THIS_PLATFORM=$(get_this_platform)

# fetches latest release download link for the platform
function get_latest_warp_link() {
    local this_platform=$1
    local info
    info=$(curl -fsSL https://api.github.com/repos/dgiagio/warp/releases)
    if [[ $? != 0 ]]; then
        echo "Error: Failed to get information about releases" >&2
        fail
    fi
    echo "$info" \
        | grep "browser_download_url" \
        | grep "$this_platform-x64.warp-packer" \
        | head -n 1 \
        | awk '{print $2}' \
        | sed -e 's/"//g'
}

# downloads and installs single binary
function install() {
    local name=$1
    local link=$2
    local temp_location="/tmp/$name"
    echo "Downloading $name..."
    curl -fsSL -o "$temp_location" "$link"
    if [[ $? != 0 ]]; then
        echo "Error: Failed to download $name" >&2
        fail
    fi
    echo "Installing $LOCATION/$name..."
    chmod 755 "$temp_location" && \
    sudo chown root:root "$temp_location" && \
    sudo mkdir -p "$LOCATION" && \
    sudo mv "$temp_location" "$LOCATION/$name"
    if [[ $? != 0 ]]; then
        echo "Error: Failed to install $name" >&2
        fail
    fi
}

WARP4J_LINK="https://raw.githubusercontent.com/guziks/warp4j/master/warp4j"

echo "Getting information about warp-packer releases..."
WARP_LINK=$(get_latest_warp_link $THIS_PLATFORM)

install "warp-packer" "$WARP_LINK" && \
install "warp4j" "$WARP4J_LINK" && \
echo "Successfully installed"