#!/usr/bin/env bash
# Shared helpers for packaging and publishing. Source from other scripts:
#   ROOT=...; . "$ROOT/scripts/lib_release.sh"
# Safe to source multiple times.
[[ -n "${_CST_LIB_RELEASE:-}" ]] && return 0
_CST_LIB_RELEASE=1

: "${ROOT:=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)}"

# Print MAJOR.MINOR.PATCH from include/cst_version.h
cst_version() {
  sed -n 's/^#define CST_VERSION_\(MAJOR\|MINOR\|PATCH\) \([0-9]*\)$/\2/p' \
    "$ROOT/include/cst_version.h" | paste -sd.
}

# Write FILE.sha256 next to FILE (relative to cwd of FILE's directory).
cst_sha256_write() {
  local f="$1" dir base
  dir="$(cd "$(dirname "$f")" && pwd)"
  base="$(basename "$f")"
  (cd "$dir" && sha256sum "$base" >"$base.sha256")
}

# Pack DIR (relative to PARENT) as PARENT/NAME.tar.gz + .sha256
#   cst_pack_tgz dist cst-agent-0.9.33-linux-x86_64
cst_pack_tgz() {
  local parent="$1" name="$2"
  mkdir -p "$parent"
  tar -C "$parent" -czf "$parent/$name.tar.gz" "$name"
  cst_sha256_write "$parent/$name.tar.gz"
  echo "$parent/$name.tar.gz"
}

# Host arch for release asset names (x86_64|x86|aarch64) or empty.
cst_host_release_arch() {
  case "$(uname -m)" in
  x86_64 | amd64) echo x86_64 ;;
  aarch64 | arm64) echo aarch64 ;;
  i686 | i386 | x86) echo x86 ;;
  *) return 1 ;;
  esac
}

# Download URL candidates for a Gitea/GitHub release asset.
#   cst_release_asset_urls VER NAME  -> prints urls
cst_release_asset_urls() {
  local ver="$1" name="$2"
  local server="${CST_GITEA:-${GITHUB_SERVER_URL:-https://git.whcself.xyz}}"
  local repo="${CST_REPO:-${GITHUB_REPOSITORY:-WHC/CST-agent}}"
  printf '%s\n' \
    "$server/$repo/releases/download/v$ver/$name" \
    "https://ghfast.top/$server/$repo/releases/download/v$ver/$name"
}

# Fetch URL list to OUT; first success wins. Returns 0 on success.
cst_fetch() {
  local out="$1"
  shift
  local u
  for u in "$@"; do
    echo "  try $u" >&2
    if curl -fsSL --retry 2 --connect-timeout 15 --max-time 600 -o "$out.part" "$u"; then
      mv "$out.part" "$out"
      return 0
    fi
  done
  rm -f "$out.part"
  return 1
}

# Fingerprint for incremental release rebuilds (compiler + version).
cst_build_stamp() {
  local cc="${1:?}"
  local machine
  machine="$("$cc" -dumpmachine 2>/dev/null || echo unknown)"
  printf '%s %s\n' "$machine" "$(cst_version)"
}