#!/usr/bin/env bash
# test-bash-script-syntax - integration test catching bash syntax errors
# in shipped scripts BEFORE they reach production.
#
# Real catch: 2026-06-12 12:00 UTC `bend-emit-pool.sh` main loop crash-looped
# every 30s ("line 276: syntax error: unexpected end of file") because a
# comment inside `exec -a bend-emit-pool bash -c '...'` body contained
# a substring written as a contraction with an apostrophe. A single-quote
# inside that bash -c body closed our outer wrapper early. Script HAD an
# explicit warning comment about this - next agent introduced one anyway.
#
# Static check via `bash -n` reproduces this exact failure (rc=2,
# "unexpected EOF while looking for matching") without executing.
# Running this gate in CI would have failed our commit pre-production.
#
# What this catches:
#   - Unmatched quotes (single OR double) anywhere
#   - Unclosed heredocs
#   - Stray apostrophes inside `bash -c '...'` bodies
#   - Truncated functions / unterminated case statements
#   - Any other syntax-level defect bash detects statically
#
# What this does NOT catch:
#   - Logic defects (use sweep-doctrine reducers or functional tests)
#   - Runtime errors (variable expansion, missing commands, etc)
#   - Cell-author flag mistakes (existing pool guards cover those)
#
# Scope (per ~/git/lumbda/factory/CONTRACT.md):
#   - Always scans $LUMBDA_FACTORY_DIR/*.sh + $LUMBDA_FACTORY_DIR/tests/integration/*.sh
#   - If $LUMBDA_DOMAIN_DIR is set, also scans $LUMBDA_DOMAIN_DIR/scripts/*.sh
#
# Exit: 0 if every .sh parses clean; non-zero with a per-file report otherwise.

set -u

LUMBDA_FACTORY_DIR="${LUMBDA_FACTORY_DIR:-$HOME/git/lumbda/factory}"
LUMBDA_TESTS_DIR="${LUMBDA_TESTS_DIR:-$HOME/git/lumbda/tests}"
LUMBDA_DOMAIN_DIR="${LUMBDA_DOMAIN_DIR:-}"

scripts=()
while IFS= read -r f; do scripts+=( "$f" ); done < <(
  find "$LUMBDA_FACTORY_DIR" -maxdepth 2 -name "*.sh" -type f 2>/dev/null
  find "$LUMBDA_TESTS_DIR/integration" -maxdepth 1 -name "*.sh" -type f 2>/dev/null
  find "$LUMBDA_TESTS_DIR/sweep-doctrine" -maxdepth 1 -name "*.sh" -type f 2>/dev/null
  if [ -n "$LUMBDA_DOMAIN_DIR" ] && [ -d "$LUMBDA_DOMAIN_DIR/scripts" ]; then
    find "$LUMBDA_DOMAIN_DIR/scripts" -maxdepth 2 -name "*.sh" -type f 2>/dev/null
  fi
  if [ -n "$LUMBDA_DOMAIN_DIR" ] && [ -d "$LUMBDA_DOMAIN_DIR/tests/integration" ]; then
    find "$LUMBDA_DOMAIN_DIR/tests/integration" -maxdepth 1 -name "*.sh" -type f 2>/dev/null
  fi
)

if [ "${#scripts[@]}" -eq 0 ]; then
  echo "ERROR: no .sh files found under $LUMBDA_FACTORY_DIR${LUMBDA_DOMAIN_DIR:+ or $LUMBDA_DOMAIN_DIR/scripts}"
  exit 1
fi

echo "[bash-syntax] checking ${#scripts[@]} script(s)"

errfile=$(mktemp /tmp/bash-n-err.XXXXXX)
trap 'rm -f "$errfile"' EXIT

fail_count=0
for s in "${scripts[@]}"; do
  if bash -n "$s" 2>"$errfile"; then
    : # pass - loud only on failure
  else
    fail_count=$((fail_count + 1))
    echo "FAIL $s:"
    sed 's/^/  /' "$errfile"
  fi
done

if [ "$fail_count" -gt 0 ]; then
  echo ""
  echo "[bash-syntax] FAIL - $fail_count script(s) failed bash -n"
  echo "Common cause: apostrophe inside an exec -a NAME bash -c ..."
  echo "wrapper closes our outer single-quote early. Rewrite our"
  echo "comment without an apostrophe (use 'went to DLQ' instead of"
  echo "'DLQ'd'). See bend-emit-pool.sh feb0408 for post-mortem."
  exit 1
fi

echo "[bash-syntax] PASS - all ${#scripts[@]} script(s) parse clean"
exit 0