#!/usr/bin/env bash
# ci-test-review :: open/update a PR on recipe-maintainers/cc-ci from the current branch
# --------------------------------------------------------------------------------------
# Run from a dedicated cc-ci clone on the branch you want to PR.
# Optional env:
#   TITLE=...          override PR title (defaults to latest commit subject)
#   BODY=...           PR body
#   BODY_FILE=...      read body from file instead of BODY
#   BASE=main          base branch (default: main)
#   REVIEWERS=trav,notplants
set -o errexit -o nounset -o pipefail

TESTENV="${TESTENV:-/srv/cc-ci/.testenv}"
set -a; . "$TESTENV"; set +a
: "${GITEA_USERNAME:?}"
: "${GITEA_PASSWORD:?}"
: "${GITEA_URL:?}"

git rev-parse --is-inside-work-tree >/dev/null

repo_root="$(git rev-parse --show-toplevel)"
cd "$repo_root"

branch="$(git rev-parse --abbrev-ref HEAD)"
[ "$branch" != "HEAD" ] || { echo "ERROR: detached HEAD; check out a branch first" >&2; exit 1; }
[ "$branch" != "main" ] || { echo "ERROR: refuse to open PR from main; use a dedicated branch" >&2; exit 1; }

base="${BASE:-main}"
title="${TITLE:-$(git log -1 --pretty=%s)}"
if [ -n "${BODY_FILE:-}" ]; then
  body="$(<"${BODY_FILE}")"
else
  body="${BODY:-}"
fi

if [ -z "$body" ]; then
  commits="$(git log --pretty='- %h %s' "origin/${base}..HEAD" 2>/dev/null || git log --pretty='- %h %s' -5)"
  body="cc-ci test update PR.\n\nCommits on top of ${base}:\n\n${commits}\n\nNOT merged — for operator review."
fi

IFS=',' read -r -a reviewers <<< "${REVIEWERS:-trav,notplants}"
reviewers_json="$(printf '%s\n' "${reviewers[@]}" | jq -R . | jq -s 'map(select(length > 0))')"

api="https://${GITEA_URL}/api/v1"
auth=(-u "${GITEA_USERNAME}:${GITEA_PASSWORD}")
payload="$(jq -n \
  --arg title "$title" \
  --arg body "$body" \
  --arg head "$branch" \
  --arg base "$base" \
  --argjson reviewers "$reviewers_json" \
  '{title:$title, body:$body, head:$head, base:$base, reviewers:$reviewers}')"

resp="$(mktemp)"
code="$({ curl -sS -o "$resp" -w "%{http_code}" "${auth[@]}" \
  -H "Content-Type: application/json" \
  -X POST "${api}/repos/recipe-maintainers/cc-ci/pulls" \
  -d "$payload"; } || true)"

if [ "$code" = "201" ]; then
  jq -r '"PR_URL=" + (.html_url // "") + "\nPR_NUMBER=" + ((.number // 0) | tostring)' "$resp"
  rm -f "$resp"
  exit 0
fi

if [ "$code" = "409" ] || grep -q "pull request already exists" "$resp" 2>/dev/null; then
  existing="$(curl -sS "${auth[@]}" "${api}/repos/recipe-maintainers/cc-ci/pulls?state=open&head=recipe-maintainers:${branch}&base=${base}")"
  url="$(printf '%s' "$existing" | jq -r '.[0].html_url // empty')"
  num="$(printf '%s' "$existing" | jq -r '.[0].number // empty')"
  if [ -n "$url" ]; then
    printf 'PR_URL=%s\nPR_NUMBER=%s\n' "$url" "$num"
    rm -f "$resp"
    exit 0
  fi
fi

echo "ERROR: PR creation failed on recipe-maintainers/cc-ci (HTTP ${code})" >&2
cat "$resp" >&2 || true
rm -f "$resp"
exit 1