#!/usr/bin/env bash
set -eo pipefail

if [ -x ./tea ]; then
  echo "tea already installed in current directory"; exit 0
fi

platform="${1:-linux-amd64}"
src="${2:-release.json}"

# obtain JSON: if src looks like a URL fetch it, otherwise treat as filename (or default file)
if [[ "$src" =~ ^https?:// ]]; then
  curl -fsSL "$src" -o /tmp/release.json.$$ 
  json="/tmp/release.json.$$"
  trap 'rm -f "$json"' EXIT
elif [ -f "$src" ]; then
  json="$src"
else
  echo "release JSON not found; provide a filename or URL as second arg" >&2
  exit 1
fi

# read tag and find binary URL (exclude archives/checksums/sigs)
tag=$(jq -r '.tag_name' "$json")
url=$(jq -r --arg p "$platform" '.assets[]
  | select(.name | test($p))
  | select(.name | test("\\.(xz|zip|gz|tar|bz2|7z|sha256|sha256sum|sig|asc)$") | not)
  | .browser_download_url' "$json" | head -n1)

[ -n "$url" ] || { echo "binary not found for $platform" >&2; exit 1; }

tmp="$(mktemp)"
trap 'rm -f "$tmp"' EXIT

curl -fsSL "$url" -o "$tmp"
mv "$tmp" tea
chmod +x tea
echo "Downloaded tag ${tag}: $url -> ./tea"