#!/bin/bash
set -e
set -o pipefail

if [[ -z "$GITHUB_TOKEN" ]]; then
	echo "Set the GITHUB_TOKEN env variable."
	exit 1
fi

if [[ -z "$GITHUB_REPOSITORY" ]]; then
	echo "Set the GITHUB_REPOSITORY env variable."
	exit 1
fi

URI=https://api.github.com
API_VERSION=v3
API_HEADER="Accept: application/vnd.github.${API_VERSION}+json"
AUTH_HEADER="Authorization: token ${GITHUB_TOKEN}"

main(){
	local files

	if [ "$#" -eq 0 ]; then
		echo "Must pass files to be uploaded..."
		exit 1
	fi
	files=( "$@" )

	# Validate the GitHub token.
	curl -o /dev/null -sSL -H "${AUTH_HEADER}" -H "${API_HEADER}" "${URI}/repos/${GITHUB_REPOSITORY}" || { echo "Error: Invalid repo, token or network issue!";  exit 1; }

	tag_response=$(curl -sSL -H "${AUTH_HEADER}" -H "${API_HEADER}" "${URI}/repos/${GITHUB_REPOSITORY}/releases/latest")

	tag_name=$(echo $tag_response | jq -e --raw-output .tag_name)
	tag_id=$(echo $tag_response | jq -e --raw-output .id)

	echo "Uploading files: ${files[@]}"
	echo "For tag name: ${tag_name} tag id: ${tag_id}"

	for file in ${files[@]}; do
		filename=$(basename "$file")
		curl -sSL -H "${AUTH_HEADER}" -H "${API_HEADER}" \
			--data-binary @"$file" \
			-H "Content-Type: application/octet-stream" \
			"${URI}/repos/${GITHUB_REPOSITORY}/releases/${tag_id}/assets?name=${filename}"

		echo "Successfully uploaded: ${file}!"
	done

	echo "Uploading assets to ${tag_name} complete!"
}

main $@