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

script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
subject="$script_dir/release-ancestry-gate.sh"
fixture_dir="$(mktemp -d)"
trap 'rm -rf -- "$fixture_dir"' EXIT

git -C "$fixture_dir" init -q
git -C "$fixture_dir" config user.email "test@example.com"
git -C "$fixture_dir" config user.name "Release Gate Test"

printf 'zero\n' > "$fixture_dir/value.txt"
git -C "$fixture_dir" add value.txt
git -C "$fixture_dir" commit -qm "before requirement"
before_sha="$(git -C "$fixture_dir" rev-parse HEAD)"

printf 'one\n' > "$fixture_dir/value.txt"
git -C "$fixture_dir" commit -qam "required"
required_sha="$(git -C "$fixture_dir" rev-parse HEAD)"

printf 'two\n' >> "$fixture_dir/value.txt"
git -C "$fixture_dir" commit -qam "pipeline"
pipeline_sha="$(git -C "$fixture_dir" rev-parse HEAD)"

printf 'three\n' >> "$fixture_dir/value.txt"
git -C "$fixture_dir" commit -qam "release"
release_sha="$(git -C "$fixture_dir" rev-parse HEAD)"

fake_bin="$fixture_dir/bin"
mkdir -p "$fake_bin"
# The generated fake reads FAKE_SUCCESS_SHA when it runs, not while this fixture is created.
# shellcheck disable=SC2016
printf '#!/usr/bin/env bash\nprintf "%%s\\n" "$FAKE_SUCCESS_SHA"\n' > "$fake_bin/gh"
chmod +x "$fake_bin/gh"

run_gate() {
  (
    cd "$fixture_dir"
    PATH="$fake_bin:$PATH" \
      FAKE_SUCCESS_SHA="$1" \
      MAX_ATTEMPTS=1 \
      POLL_SECONDS=0 \
      bash "$subject" "Example Data Pipeline" "$required_sha" "$release_sha"
  )
}

run_gate "$required_sha"
run_gate "$pipeline_sha"

if run_gate "$before_sha" 2>/dev/null; then
  echo "expected a run before the requirement to fail" >&2
  exit 1
fi

echo "workflow ancestry tests passed"