#!/usr/bin/env bash
# run-plan.sh — dispatch one plan-queue plan file to a cheap executor.
#
# Usage:
#   run-plan.sh [-d REPO_DIR] [-m TIER] [-t SECS] [-a "addendum"] [-p] plans/active/NNN-slug-hash.md
#
#   -d DIR   repo root the executor works in (default: cwd)
#   -m TIER  model tier alias for delegate.sh (default: haiku)
#   -t SECS  timeout (default: 1800)
#   -a TEXT  corrective addendum appended to the prompt (fix rounds)
#   -p       print the built prompt to stdout and exit (for Agent-tool mode)
set -euo pipefail

DIR="$(pwd)"
MODEL="haiku"
TIMEOUT=1800
ADDENDUM=""
PRINT_ONLY=0

while getopts "d:m:t:a:p" opt; do
  case "$opt" in
    d) DIR="$OPTARG" ;;
    m) MODEL="$OPTARG" ;;
    t) TIMEOUT="$OPTARG" ;;
    a) ADDENDUM="$OPTARG" ;;
    p) PRINT_ONLY=1 ;;
    *) exit 2 ;;
  esac
done
shift $((OPTIND - 1))
PLAN="${1:?usage: run-plan.sh [opts] <plan-file>}"
[ -f "$PLAN" ] || { echo "plan file not found: $PLAN" >&2; exit 1; }

PROMPT_FILE="$(mktemp)"
trap 'rm -f "$PROMPT_FILE"' EXIT

{
  cat <<'PREAMBLE'
You are a plan EXECUTOR. Apply the plan below exactly.

Rules:
- Follow the Steps in order. Do not explore beyond the files the plan names.
- Do not refactor, rename, or "improve" anything outside the Steps.
- Respect the "Out of scope / do NOT touch" section absolutely.
- Run the Verification commands after making the changes.
- Do NOT commit, do NOT push, do NOT create branches.
- Your final output must be ONLY, in this order:
  1. The full `git diff` (unified) of your changes.
  2. The raw output of the Verification commands.
  3. `Findings:` followed by at most 10 lines (surprises, deviations, skips).
No other prose, no explanations, no step-by-step narration.

=== PLAN ===
PREAMBLE
  cat "$PLAN"
  if [ -n "$ADDENDUM" ]; then
    printf '\n=== CORRECTION (a previous attempt failed — apply this too) ===\n%s\n' "$ADDENDUM"
  fi
} > "$PROMPT_FILE"

if [ "$PRINT_ONLY" -eq 1 ]; then
  cat "$PROMPT_FILE"
  exit 0
fi

exec "$HOME/.claude/skills/delegate-task/delegate.sh" \
  -m "$MODEL" -d "$DIR" -t "$TIMEOUT" -f "$PROMPT_FILE"