#!/bin/sh
# Build only; this never starts services.
#
# The revision is validated and baked into the image (BUILD_ID + the OCI
# revision label), so the result can always be traced back to a commit and
# /api/build can report it at runtime. Plain `docker compose build` does not set
# GIT_REVISION and produces an image labelled "unknown" — which is why this is
# the supported way to build.
#
# The image is tagged twice: ped-ai-local:<revision> is immutable and is what a
# deploy should name, ped-ai-local:latest is the convenience pointer.
set -eu
cd "$(dirname "$0")/.."
if [ -e .git ]; then
  GIT_REVISION=$(env -i PATH="$PATH" HOME="${HOME:-}" git rev-parse --verify 'HEAD^{commit}')
  printf '%s\n' "$GIT_REVISION" | grep -Eq '^[0-9a-f]{40}$' || {
    echo 'Expected a full lowercase Git SHA' >&2
    exit 1
  }
else
  GIT_REVISION=unknown
  echo 'Unversioned development build: revision unknown' >&2
fi
export GIT_REVISION

# A local build always writes the local tag, even when .env pins PED_AI_IMAGE to
# a deployed registry image — otherwise building here would quietly overwrite
# the tag a deploy is pinned to.
PED_AI_IMAGE=ped-ai-local:latest
export PED_AI_IMAGE

docker compose build "$@" pediatric-scribe

if [ "$GIT_REVISION" != unknown ]; then
  docker tag ped-ai-local:latest "ped-ai-local:$GIT_REVISION"
  echo "Built ped-ai-local:$GIT_REVISION (also tagged :latest)" >&2
else
  echo 'Built ped-ai-local:latest with no recorded revision' >&2
fi

# Building is not deploying. `docker compose up` takes its image from
# PED_AI_IMAGE in .env, which this script does not move, so a pin left behind by
# an earlier deploy starts that older image while every signal reports success:
# the build completes, `up` says the container started, and /api/health returns
# {ok:true} from the wrong revision.
#
# scripts/deploy.sh is the answer to this and has been since it landed: it moves
# the pin, waits for health, then asks /api/build which revision is actually
# serving and rolls back if it is not the one requested. Running `up` by hand
# skips all three. This points at it rather than repeating half of it.
if [ "$GIT_REVISION" != unknown ] && [ -f .env ]; then
  PINNED=$(sed -n 's/^PED_AI_IMAGE=//p' .env | tail -1)
  case "$PINNED" in
    '') ;;
    *"$GIT_REVISION") ;;
    *)
      echo >&2
      echo "NOTE: .env still pins PED_AI_IMAGE=$PINNED" >&2
      echo "      so 'docker compose up' would start that image, not this build." >&2
      echo >&2
      echo "      Deploy this build with:" >&2
      echo "        scripts/deploy.sh ped-ai-local:$GIT_REVISION $GIT_REVISION" >&2
      echo >&2
      echo "      which moves the pin and then verifies /api/build, rolling back" >&2
      echo "      if the container comes up on a different revision." >&2
      echo >&2
      ;;
  esac
fi