#!/usr/bin/env bash
# Row 73 (#1567): rerun the role-file revert and the mutants against a tree
# with the candidate. Usage: mutants.sh <tree>. Each mutant edits one line,
# runs the row's tests, and restores the file from a saved copy, so the tree
# need not be committed. Prints "killed" or "SURVIVED" per mutant; exit 1 if
# any survives, a sed doesn't change its file, or the unmutated run fails.
# The tasks test is in the list but kills nothing here: the verb refuses a
# coder's task.reassign with or without the grant.
set -euo pipefail
TREE="$(cd "${1:?usage: mutants.sh <tree>}" && pwd)"
cd "$TREE"
ROLE=roles/coder.json
BROKER=packages/bus/src/broker.mjs
RESOLVE=packages/business/src/resolve.mjs
TOOLS=packages/harness/src/tools.mjs
TESTS=(
  packages/bus/tests/broker.test.mjs
  packages/business/tests/role.test.mjs
  packages/business/tests/resolve.test.mjs
  packages/harness/tests/tools.test.mjs
  packages/tasks/tests/verbs.test.mjs
)
run_tests() { node --test "${TESTS[@]}" >"$1" 2>&1; }

# name | file | sed expression
MUTANTS=(
  'role-keeps-reassign|'"$ROLE"'|s/"crossRole": \["task.scope.change"\]/"crossRole": ["task.reassign", "task.scope.change"]/'
  'broker-unlisted-cross|'"$BROKER"'|/^        ? .cross-role.$/{n;s/^        : .gated.;$/        : '"'"'cross-role'"'"';/}'
  'resolve-cross-unnarrowed|'"$RESOLVE"'|s/^    crossRole = crossRole.filter((a) => vars\["limits.authority"\].includes(a));$/    crossRole = [...crossRole];/'
  'classify-unlisted-cross|'"$RESOLVE"'|/^  if (resolved.limits.authority.crossRole.includes(action)) return "cross";$/{n;s/return "gated";/return "cross";/}'
  'tools-all-task-verbs|'"$TOOLS"'|s/^      if (held.has(action)) add(name, action, action, description, obj(properties, required));$/      add(name, action, action, description, obj(properties, required));/'
)

OUT="${OUT:-$TREE/.mutants}"
mkdir -p "$OUT"
run_tests "$OUT/baseline.log" || { echo "baseline run failed: $OUT/baseline.log" >&2; exit 1; }
echo "baseline: pass"
status=0
for m in "${MUTANTS[@]}"; do
  IFS='|' read -r name file expr <<<"$m"
  cp -p "$file" "$OUT/orig"
  sed -i -e "$expr" "$file"
  if cmp -s "$OUT/orig" "$file"; then
    echo "$name: NOT APPLIED (sed matched nothing)"; status=1; continue
  fi
  diff -u "$OUT/orig" "$file" >"$OUT/$name.diff" || true
  if run_tests "$OUT/$name.log"; then
    echo "$name: SURVIVED"; status=1
  else
    echo "$name: killed ($(grep -E '^✖' "$OUT/$name.log" | grep -v 'failing tests' | sed 's/ ([0-9.]*ms)$//' | sort -u | tr '\n' ';'))"
  fi
  cp -p "$OUT/orig" "$file"
  cmp -s "$OUT/orig" "$file" || { echo "restore failed: $file" >&2; exit 1; }
  rm -f "$OUT/orig"
done
exit "$status"