#!/usr/bin/env bash
# Build a glibc NativeAOT Backend OCI image with statically linked SQLite; publishing is optional.
# glibc and a dynamic executable are required: the musl AotAnywhere output is fully static and cannot dlopen libssl, so the signing code fails at startup.
set -euo pipefail

arch="${1:?usage: release-linux.sh <amd64|arm64>}"
root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
tag="${CI_COMMIT_TAG:-}"
if [[ -n "$tag" ]]; then
  [[ "$tag" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z.-]+)?$ ]] || {
    echo "release must run from a vMAJOR.MINOR.PATCH tag" >&2
    exit 2
  }
  version="${tag#v}"
else
  [[ "${CI_PIPELINE_EVENT:-}" == push && "${CI_COMMIT_BRANCH:-}" == main && "${CI_COMMIT_MESSAGE:-}" == *"[CI]"* ]] || {
    echo "untagged backend builds require a main push with [CI] in the commit message" >&2
    exit 2
  }
  version=main
fi
image_publish="${IMAGE_PUBLISH:-true}"
[[ "$image_publish" == true || "$image_publish" == false ]] || {
  echo "IMAGE_PUBLISH must be true or false" >&2; exit 2;
}
if [[ "$image_publish" == true ]]; then
  [[ -n "${ZOT_USERNAME:-}" && -n "${ZOT_SECRET:-}" ]] || {
    echo "Zot credentials are required" >&2; exit 2;
  }
fi
case "$arch" in
  amd64) rid=linux-x64 ;;
  arm64) rid=linux-arm64 ;;
  *) echo "unsupported architecture: $arch" >&2; exit 2 ;;
esac

project_version="$(sed -n 's#.*<Version>\(.*\)</Version>.*#\1#p' "$root/backend/Directory.Build.props" | head -1)"
if [[ -n "$tag" && "$version" != "$project_version" ]]; then
  echo "tag version $version does not match project version $project_version" >&2
  exit 1
fi

registry="${ZOT_REGISTRY:-registry.oeo.one}"
image="${ZOT_IMAGE_REPOSITORY:-$registry/moshiro/moshiro-backend}"
output="$root/.release/linux-$arch/backend"
build_root="$root/.release/build/linux-$arch-backend"
container_context="$root/.release/container/linux-$arch"
mkdir -p "$output" "$build_root" "$container_context/app" "$container_context/data"

# 构建信息：tag 发布用 tag，main 构建用 main-<提交>
export MOSHIRO_TAG="${MOSHIRO_TAG:-${tag:-main-${CI_COMMIT_SHA:0:10}}}"
export MOSHIRO_COMMIT="${MOSHIRO_COMMIT:-${CI_COMMIT_SHA:0:10}}"
export MOSHIRO_BUILT_AT="${MOSHIRO_BUILT_AT:-$(date -u +%Y-%m-%dT%H:%M:%SZ)}"

(cd "$root/backend" && dotnet publish src/MoShiro.Backend \
  -m:3 -c Release -r "$rid" --self-contained true \
  -p:DebugType=none -p:DebugSymbols=false \
  -p:PublishAot=true -p:UseAotAnywhere=true -p:SqliteStaticLink=true -p:OpenApiGenerateDocuments=false \
  --artifacts-path "$build_root" -o "$output")
[[ -x "$output/moshiro-backend" ]] || { echo "NativeAOT Backend executable is missing" >&2; exit 1; }
[[ "$(wc -c < "$output/moshiro-backend")" -gt 2000000 ]] || { echo "Backend output is an apphost, not a NativeAOT executable" >&2; exit 1; }
install -m 0755 "$output/moshiro-backend" "$container_context/app/moshiro-backend"
: > "$container_context/data/.keep"

# Woodpecker's local backend isolates HOME per workflow. Keep Buildah's image
# store outside that temporary directory so the runtime base image is reusable
# across releases. Separate stores avoid concurrent amd64/arm64 writers.
buildah_home="${BUILDAH_HOME:-/home/justme/woodpecker/buildah-home/$arch}"
mkdir -p "$buildah_home"
export HOME="$buildah_home"

local_image="localhost/moshiro-backend:$version-$arch"
buildah bud --tls-verify=true --arch "$arch" \
  --build-arg "APP_VERSION=$version" \
  -f "$root/packaging/container/Backend.Containerfile" \
  -t "$local_image" "$container_context"
if [[ "$image_publish" == false ]]; then
  echo "built local Backend image for $arch; not publishing it"
  exit 0
fi
export REGISTRY_AUTH_FILE="$root/.release/auth/zot-linux-$arch.json"
mkdir -p "$(dirname "$REGISTRY_AUTH_FILE")"
logged_in=false
for attempt in 1 2 3 4; do
  if buildah login --tls-verify=true --username "$ZOT_USERNAME" --password-stdin "$registry" <<< "$ZOT_SECRET" >/dev/null; then
    logged_in=true
    break
  fi
  if [[ "$attempt" -lt 4 ]]; then
    echo "Zot login attempt $attempt failed; retrying in 3 seconds" >&2
    sleep 3
  fi
done
[[ "$logged_in" == true ]] || { echo "could not authenticate to Zot after 4 attempts" >&2; exit 1; }
push_tag() {
  local target_tag="$1" pushed=false
  for attempt in 1 2 3; do
    if buildah push --tls-verify=true --digestfile "$output/image.digest" "$local_image" "docker://$image:$target_tag"; then
      pushed=true
      break
    fi
    if [[ "$attempt" -lt 3 ]]; then
      echo "Zot push attempt $attempt failed; retrying in 5 seconds" >&2
      sleep 5
    fi
  done
  [[ "$pushed" == true ]] || { echo "could not push image to Zot after 3 attempts" >&2; return 1; }
  echo "pushed Zot image $image:$target_tag"
}

if [[ -n "${IMAGE_TAGS:-}" ]]; then
  IFS=',' read -r -a image_tags <<< "$IMAGE_TAGS"
  ((${#image_tags[@]} > 0)) || { echo "IMAGE_TAGS must contain at least one tag" >&2; exit 2; }
  for image_tag in "${image_tags[@]}"; do
    [[ "$image_tag" =~ ^[A-Za-z0-9_][A-Za-z0-9_.-]{0,127}$ ]] || {
      echo "invalid image tag: $image_tag" >&2
      exit 2
    }
    push_tag "$image_tag"
  done
else
  push_tag "$version-$arch"
  if [[ -z "$tag" ]]; then
    push_tag "$version"
  fi
fi

if [[ -z "$tag" ]]; then
  bash "$root/ci/publish-release-offer.sh" backend "$image" "$(cat "$output/image.digest")" "$MOSHIRO_TAG" dev "$output/release"
fi