#!/usr/bin/env bash
# Renders Homebrew Formula + Scoop manifest files for this release and
# pushes them into the shared tap repo (see .gitea/workflows/release.yml).
# Other tools publishing into the same tap repo can copy this script
# verbatim — only SRC_HOMEPAGE/BIN_NAME/DESC below need to change.
set -euo pipefail

: "${VERSION:?VERSION (e.g. v1.2.3) is required}"
: "${TAP_TOKEN:?TAP_TOKEN secret is required}"

TAP_REPO_URL="https://tap:${TAP_TOKEN}@git.morlana.online/f.weber/homebrew-tap.git"
TAP_BRANCH="main"

BIN_NAME="vault-tui"
DESC="Terminal UI and CLI for HashiCorp Vault"
SRC_HOMEPAGE="https://git.morlana.online/f.weber/vault-tui"
RELEASE_BASE="${SRC_HOMEPAGE}/releases/download/${VERSION}"
DIST="dist"
VER_NUM="${VERSION#v}" # Formula/manifest "version" fields conventionally omit the leading v

sha() { # sha <checksums-file> <asset-filename>
	grep " $2\$" "$1" | awk '{print $1}'
}

CK="${DIST}/checksums-${BIN_NAME}-${VERSION}.txt"
CK_CLOUD="${DIST}/checksums-${BIN_NAME}-cloud-${VERSION}.txt"

SHA_LINUX_AMD64=$(sha "$CK" "${BIN_NAME}-${VERSION}-linux-amd64.tar.gz")
SHA_LINUX_ARM64=$(sha "$CK" "${BIN_NAME}-${VERSION}-linux-arm64.tar.gz")
SHA_DARWIN_AMD64=$(sha "$CK" "${BIN_NAME}-${VERSION}-darwin-amd64.tar.gz")
SHA_DARWIN_ARM64=$(sha "$CK" "${BIN_NAME}-${VERSION}-darwin-arm64.tar.gz")
SHA_WINDOWS_AMD64=$(sha "$CK" "${BIN_NAME}-${VERSION}-windows-amd64.zip")

SHA_CLOUD_LINUX_AMD64=$(sha "$CK_CLOUD" "${BIN_NAME}-cloud-${VERSION}-linux-amd64.tar.gz")
SHA_CLOUD_LINUX_ARM64=$(sha "$CK_CLOUD" "${BIN_NAME}-cloud-${VERSION}-linux-arm64.tar.gz")
SHA_CLOUD_DARWIN_AMD64=$(sha "$CK_CLOUD" "${BIN_NAME}-cloud-${VERSION}-darwin-amd64.tar.gz")
SHA_CLOUD_DARWIN_ARM64=$(sha "$CK_CLOUD" "${BIN_NAME}-cloud-${VERSION}-darwin-arm64.tar.gz")
SHA_CLOUD_WINDOWS_AMD64=$(sha "$CK_CLOUD" "${BIN_NAME}-cloud-${VERSION}-windows-amd64.zip")

WORKDIR=$(mktemp -d)
trap 'rm -rf "$WORKDIR"' EXIT

git clone --depth 1 --branch "$TAP_BRANCH" "$TAP_REPO_URL" "$WORKDIR"
cd "$WORKDIR"
mkdir -p Formula bucket

render_formula() { # render_formula <class> <bin-prefix> <install-name>
	local class="$1" prefix="$2" install_name="$3"
	local sha_l_amd sha_l_arm sha_d_amd sha_d_arm
	if [ "$prefix" = "${BIN_NAME}-cloud" ]; then
		sha_l_amd="$SHA_CLOUD_LINUX_AMD64"; sha_l_arm="$SHA_CLOUD_LINUX_ARM64"
		sha_d_amd="$SHA_CLOUD_DARWIN_AMD64"; sha_d_arm="$SHA_CLOUD_DARWIN_ARM64"
	else
		sha_l_amd="$SHA_LINUX_AMD64"; sha_l_arm="$SHA_LINUX_ARM64"
		sha_d_amd="$SHA_DARWIN_AMD64"; sha_d_arm="$SHA_DARWIN_ARM64"
	fi
	cat <<EOF
class ${class} < Formula
  desc "${DESC}"
  homepage "${SRC_HOMEPAGE}"
  version "${VER_NUM}"

  on_macos do
    if Hardware::CPU.arm?
      url "${RELEASE_BASE}/${prefix}-${VERSION}-darwin-arm64.tar.gz"
      sha256 "${sha_d_arm}"
    else
      url "${RELEASE_BASE}/${prefix}-${VERSION}-darwin-amd64.tar.gz"
      sha256 "${sha_d_amd}"
    end
  end

  on_linux do
    if Hardware::CPU.arm?
      url "${RELEASE_BASE}/${prefix}-${VERSION}-linux-arm64.tar.gz"
      sha256 "${sha_l_arm}"
    else
      url "${RELEASE_BASE}/${prefix}-${VERSION}-linux-amd64.tar.gz"
      sha256 "${sha_l_amd}"
    end
  end

  def install
    Dir["${prefix}-*"].each { |f| bin.install f => "${install_name}" }
  end

  test do
    assert_match version.to_s, shell_output("#{bin}/${install_name} version")
  end
end
EOF
}

render_scoop() { # render_scoop <bin-prefix> <exe-name> <sha256>
	local prefix="$1" exe_name="$2" sha="$3"
	cat <<EOF
{
    "version": "${VER_NUM}",
    "description": "${DESC}",
    "homepage": "${SRC_HOMEPAGE}",
    "url": "${RELEASE_BASE}/${prefix}-${VERSION}-windows-amd64.zip",
    "hash": "${sha}",
    "bin": [["${prefix}-${VERSION}-windows-amd64.exe", "${exe_name}.exe"]]
}
EOF
}

render_formula "VaultTui" "${BIN_NAME}" "${BIN_NAME}" >Formula/vault-tui.rb
render_formula "VaultTuiCloud" "${BIN_NAME}-cloud" "${BIN_NAME}-cloud" >Formula/vault-tui-cloud.rb
render_scoop "${BIN_NAME}" "vault-tui" "${SHA_WINDOWS_AMD64}" >bucket/vault-tui.json
render_scoop "${BIN_NAME}-cloud" "vault-tui-cloud" "${SHA_CLOUD_WINDOWS_AMD64}" >bucket/vault-tui-cloud.json

git config user.name "vault-tui-release"
git config user.email "vault-tui-bot@users.noreply.git.morlana.online"
git add Formula/vault-tui.rb Formula/vault-tui-cloud.rb bucket/vault-tui.json bucket/vault-tui-cloud.json

if git diff --cached --quiet; then
	echo "tap already up to date with ${VERSION}, nothing to push"
	exit 0
fi

git commit -m "vault-tui ${VERSION}"
git push origin "HEAD:${TAP_BRANCH}"
echo "pushed vault-tui ${VERSION} to the tap"