#!/usr/bin/env bash
# T-FOLLOW-002 v2: state-class pre-commit reminder
#
# When the developer commits, this hook scans working-tree changes
# against the 9 state classes (decisions/ waitpoints/ tasks/ missions/
# plans/ dispatch/ workflows/ skills/ branches/registry.json) and
# prints a reminder if any of them are unstaged / untracked.
#
# It does NOT block the commit. The intent is to surface a forgotten
# `git add` before the commit lands, not to force a workflow.
#
# To disable: `git -C .agent commit --no-verify`.
# To uninstall: `git -C .agent config --unset core.hooksPath`.
#
# Wiring (one-time, per clone):
#   git -C .agent config core.hooksPath .githooks
#
# This is part of the state-sync flow. Run
#   cortex-agent state-sync --add
# (or --commit / --push) to do the staged work in one shot.

set -e

STATE_DIRS=(
  "decisions"
  "waitpoints"
  "tasks"
  "missions"
  "plans"
  "dispatch"
  "workflows"
  "skills"
)
STATE_FILES=(
  "branches/registry.json"
)

is_state_path() {
  local f="$1"
  for d in "${STATE_DIRS[@]}"; do
    if [ "$f" = "$d" ] || [[ "$f" == "$d/"* ]]; then
      return 0
    fi
  done
  for sf in "${STATE_FILES[@]}"; do
    if [ "$f" = "$sf" ]; then
      return 0
    fi
  done
  return 1
}

# git status --porcelain --untracked-files=all
# Lines look like:
#   " M foo"   unstaged modification
#   "M  foo"   staged modification
#   "?? foo"   untracked
unstaged_state=()
while IFS= read -r line; do
  [ -z "$line" ] && continue
  # Extract filename: skip the 2-char XY status + 1 space, then handle " -> " rename.
  rest="${line:3}"
  if [[ "$rest" == *" -> "* ]]; then
    file="${rest##* -> }"
  else
    file="$rest"
  fi
  # Skip if already staged (XY[0] is not ' ' and not '?').
  xy="${line:0:2}"
  xy_staged_char="${xy:0:1}"
  if [ "$xy_staged_char" != " " ] && [ "$xy_staged_char" != "?" ]; then
    continue
  fi
  if is_state_path "$file"; then
    unstaged_state+=("$file")
  fi
done < <(git status --porcelain --untracked-files=all 2>/dev/null || true)

if [ "${#unstaged_state[@]}" -gt 0 ]; then
  echo ""
  echo "⚠️  state-sync reminder: ${#unstaged_state[@]} state-class file(s) are unstaged / untracked:"
  for f in "${unstaged_state[@]}"; do
    echo "    $f"
  done
  echo ""
  echo "  Run \`cortex-agent state-sync --add\` to stage them,"
  echo "  or \`--commit\` / \`--push\` to finish in one shot."
  echo "  (This is a reminder, not a blocker — proceeding with commit.)"
  echo ""
fi

exit 0