#!/usr/bin/env bash
# Single headless poll via Grok for the heavy-duty org watcher.
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
# shellcheck source=lib/common.sh
source "${SCRIPT_DIR}/lib/common.sh"

mkdir -p "${LOG_DIR}"
TS="$(utc_now)"
PROMPT_FILE="${WATCHER_DIR}/.poll-prompt.txt"

case "${FORGE_BACKEND}" in
  github)
    DISCOVERY_HINT="gh search prs/issues --owner ${ORG} (review-requested=@me / assignee=@me)"
    POST_HINT="Prefer gh pr review / gh issue comment"
    BACKEND_LABEL="GitHub"
    ;;
  forgejo)
    DISCOVERY_HINT="bash ${WATCHER_DIR}/scripts/discover.sh  # FORGE_BACKEND=forgejo"
    POST_HINT="Prefer stoke pr review / stoke pr comment (Forgejo at ${FORGEJO_URL})"
    BACKEND_LABEL="Forgejo"
    ;;
  *)
    echo "error: unknown FORGE_BACKEND=${FORGE_BACKEND}" >&2
    exit 2
    ;;
esac

cat > "${PROMPT_FILE}" <<EOF
Execute ONE full poll cycle for the heavy-duty org ${BACKEND_LABEL} watcher.

1. Read ${WATCHER_DIR}/POLL_INSTRUCTIONS.md and ${WATCHER_DIR}/state.json
2. Bot: ${BOT_LOGIN}. Scope: ALL repos under org ${ORG} (not a single repo). Backend: ${FORGE_BACKEND}.
3. Discover open Issues/PRs where bot is assignee OR review-requested:
   ${DISCOVERY_HINT}
   Or run: FORGE_BACKEND=${FORGE_BACKEND} bash ${WATCHER_DIR}/scripts/discover.sh
4. For each match: read ALL comments/reviews/inline threads/diff/checks first; never repeat prior ${BOT_LOGIN} comments.
5. Comment/review only if first assignment, new commits (head SHA change vs state), new human comments needing reply, material CI change, or explicit re-request. Else silent.
6. Style: clear Verdict (Approve/Comment/Request changes) or Status (Aligned/Feedback/Need info). Specific, non-redundant, actionable. Blockers vs nits. ${POST_HINT}. Keep reviewing across updates until you fully agree (then Approve).
7. Never merge/close/reassign/drive-by on unassigned items.
8. Update ${WATCHER_DIR}/state.json (keys like ${ORG}/repo#pr:N) + append one line to ${WATCHER_DIR}/logs/poll.log
9. Brief report only. If zero assignments, log and exit.
EOF

watcher_log "${LOG_DIR}/poll.log" "poll-once.sh starting headless grok (org:${ORG} backend:${FORGE_BACKEND})"

if ! command -v grok >/dev/null 2>&1; then
  watcher_log "${LOG_DIR}/poll.log" "poll-once.sh failed: grok CLI not found"
  echo "error: grok CLI not found on PATH" >&2
  exit 127
fi

if grok --always-approve --cwd "${HOME}" --max-turns 80 \
  --single "$(cat "${PROMPT_FILE}")" \
  >> "${LOG_DIR}/poll-headless.log" 2>&1; then
  watcher_log "${LOG_DIR}/poll.log" "poll-once.sh finished ok"
else
  rc=$?
  watcher_log "${LOG_DIR}/poll.log" "poll-once.sh failed rc=${rc}"
  exit "${rc}"
fi