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

ROOT=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)
LOCK="$ROOT/deploys/versions.lock.json"
VERSION=${1:-$(awk -F'"' '/"version"[[:space:]]*:/ {print $4; exit}' "$LOCK")}
[[ "$VERSION" =~ ^[0-9A-Za-z][0-9A-Za-z.+_-]*$ ]] || { echo 'invalid version' >&2; exit 2; }

RELEASE_DIR="$ROOT/dist/release-$VERSION"
STAGE="$ROOT/dist/package-$VERSION"
ARCHIVE="$ROOT/dist/packages/sip-go-agent-$VERSION-linux-amd64.tar.gz"
for output in "$RELEASE_DIR" "$STAGE" "$ARCHIVE" "$ARCHIVE.sha256"; do
  if [[ -e "$output" || -L "$output" ]]; then
    echo "package output already exists; refusing to replace it: $output" >&2
    exit 1
  fi
done
RELEASE_VERSION="$VERSION" "$ROOT/scripts/build-release.sh" "$RELEASE_DIR"
mkdir -p -- "$(dirname -- "$ARCHIVE")"
mkdir -- "$STAGE"
cp -a "$RELEASE_DIR/." "$STAGE/"
mkdir -p "$STAGE/systemd" "$STAGE/env" "$STAGE/config"
cp "$ROOT/deploys/install.sh" "$STAGE/install.sh"
cp "$ROOT/deploys/systemd/"*.service "$STAGE/systemd/"
cp "$ROOT/deploys/env/agent.env.example" "$ROOT/deploys/env/dispatcher.env.example" "$STAGE/env/"
cp "$ROOT/deploys/config/agent-endpoints.example.json" "$STAGE/config/"
cp "$LOCK" "$STAGE/versions.lock.json"
chmod 0755 "$STAGE/install.sh"
chmod 0644 "$STAGE/systemd/"*.service "$STAGE/env/"*.env.example "$STAGE/config/agent-endpoints.example.json" "$STAGE/versions.lock.json"
(
  cd "$STAGE"
  find . -type f ! -name package.SHA256SUMS -printf '%P\n' | sort | while IFS= read -r file; do
    sha256sum "$file"
  done > package.SHA256SUMS
)
tar -C "$STAGE" -czf "$ARCHIVE" .
(
  cd "$(dirname -- "$ARCHIVE")"
  sha256sum "$(basename -- "$ARCHIVE")" > "$(basename -- "$ARCHIVE").sha256"
)
rm -rf -- "$STAGE"
printf 'package=%s\nchecksum=%s\n' "$ARCHIVE" "$ARCHIVE.sha256"