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

# The composite action's executable boundary (#218). Keeping the GraphQL
# gather here lets the offline contract test replace `gh` and prove that
# failed and partial reads cannot accidentally produce a green verdict.

# THIS ACTION IS STILL gh-ONLY, AND SAYS SO (#198 spec 4, #199 ports it).
# Its entire gather is a single GraphQL query issued through `gh`, and
# Forgejo serves no
# GraphQL surface at all — `/api/graphql` 404s on this instance, and a real
# forgejo-runner job arrives with GITHUB_GRAPHQL_URL set to the empty string
# (lib/forge.sh's header). There is no endpoint to translate this to, so
# unlike every other call site the merge touched it cannot be ported here;
# it has to be re-expressed over REST, which is #199.
#
# Until then the declaration is the honest move: CEREMONY_FORGE_CLIENT names
# the client this file actually speaks, and forge_preflight refuses loudly on
# a forge that cannot serve it — rather than reading nothing and reporting a
# verdict. That is lib/forge.sh's own rule, "Never 'probably github'",
# applied to the one action that has not caught up yet.
# shellcheck source=lib/forge.sh
. "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/../../lib/forge.sh"
export CEREMONY_FORGE_CLIENT=gh
# The refusal and the SCHEDULING are two different questions, and #198's first
# head conflated them: preflight refused correctly on this forge and turned
# every PR's `Refs guard` red, which blocks the board rather than protecting
# it. A guard that cannot run here must not claim a verdict — but it also must
# not stand permanently red for a port that has its own issue.
#
# So: not-runnable-here is reported and skipped, loudly and by name, and only
# a preflight failure for any OTHER reason is fatal. The distinction is the
# forge, not the exit code — on a forge this action CAN speak, a preflight
# failure is still a hard refusal, which is the case the tests drive.
preflight_err="$(mktemp)"
trap 'rm -f "$preflight_err"' EXIT
if ! forge_preflight 2>"$preflight_err"; then
  cat "$preflight_err" >&2
  if [ "$(forge_detect 2>/dev/null)" != github ]; then
    printf '::notice::refs-not-closing: not run — this action is still gh-only (its gather is GraphQL, which this forge does not serve) and #199 ports it. No verdict was produced.\n'
    exit 0
  fi
  exit 1
fi

owner="${GITHUB_REPOSITORY%%/*}"
name="${GITHUB_REPOSITORY#*/}"
[ -n "${PR_NUMBER:-}" ] || {
  echo "refs-not-closing: pull request number is unavailable" >&2
  exit 1
}

# GraphQL variables are literal API syntax; the shell must not expand them.
# shellcheck disable=SC2016
facts="$(gh api graphql \
  -f query='query($owner: String!, $name: String!, $number: Int!) {
    repository(owner: $owner, name: $name) {
      pullRequest(number: $number) {
        body
        closingIssuesReferences(first: 100) {
          nodes { number }
          pageInfo { hasNextPage }
        }
      }
    }
  }' \
  -F owner="$owner" -F name="$name" -F number="$PR_NUMBER")"

body_file="$(mktemp)"
closing_file="$(mktemp)"
trap 'rm -f "$body_file" "$closing_file"' EXIT
jq -er '
  .data.repository.pullRequest
  | if . == null then error("pull request was not returned") else .body // "" end
' <<<"$facts" >"$body_file"
jq -r '
  .data.repository.pullRequest.closingIssuesReferences
  | if . == null then
      error("closing issue references were not returned")
    elif .pageInfo.hasNextPage then
      error("more than 100 closing issue references; refusing a partial verdict")
    else
      .nodes[].number
    end
' <<<"$facts" >"$closing_file"

mapfile -t closing_issues <"$closing_file"
bash "$GITHUB_ACTION_PATH/refs-not-closing.sh" \
  "$body_file" "${closing_issues[@]}"