#!/usr/bin/env bash
#
# selftest.sh — quick, dependency-light verification for agent-queue.
#
# Runs:
#   1. shellcheck (if installed) at --severity=error on the runner
#   2. bash -n syntax check on the runner + this script
#   3. node --check on the dashboard (if node installed)
#   4. a live init/add/run --once cycle against a throwaway queue using a
#      no-op engine stub (no real agent CLI is ever invoked)
#
# It uses its own temp AGENT_QUEUE_ROOT so it never touches a real queue.
# Exit 0 = all good. Run it before every commit.
#
set -euo pipefail

HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
AQ="$HERE/agent-queue.sh"

pass() { printf '  \033[32m✓\033[0m %s\n' "$*"; }
info() { printf '  \033[36m•\033[0m %s\n' "$*"; }
fail() { printf '  \033[31m✗ %s\033[0m\n' "$*" >&2; exit 1; }

tmp="$(mktemp -d "${TMPDIR:-/tmp}/aq-selftest.XXXXXX")"
cleanup() { rm -rf "$tmp"; }
trap cleanup EXIT

echo "agent-queue self-test"

# 1. shellcheck (optional)
if command -v shellcheck >/dev/null 2>&1; then
  shellcheck --severity=error --shell=bash "$AQ" "${BASH_SOURCE[0]}" && pass "shellcheck (errors): clean"
else
  info "shellcheck not installed — skipping"
fi

# 2. syntax
bash -n "$AQ" && pass "bash -n agent-queue.sh"
bash -n "${BASH_SOURCE[0]}" && pass "bash -n selftest.sh"

# 3. dashboard syntax (optional)
if command -v node >/dev/null 2>&1; then
  node --check "$HERE/dashboard.mjs" && pass "node --check dashboard.mjs"
else
  info "node not installed — skipping dashboard check"
fi

# 4. live no-op cycle
export AGENT_QUEUE_ROOT="$tmp/queue"
stub="$tmp/noop-engine"
printf '#!/usr/bin/env bash\n# no-op engine stub: drain stdin, succeed\ncat >/dev/null 2>&1 || true\nexit 0\n' > "$stub"
chmod +x "$stub"

work="$tmp/work"; mkdir -p "$work"
task="$tmp/task.md"
printf '%s\n' '---' 'engine: devin' "cwd: $work" 'yolo: true' '---' '' '# self-test no-op task' > "$task"

"$AQ" init >/dev/null
DEVIN_BIN="$stub" "$AQ" add "$task" >/dev/null
DEVIN_BIN="$stub" "$AQ" run --once >/dev/null 2>&1

if ls "$AGENT_QUEUE_ROOT"/done/*.md >/dev/null 2>&1; then
  pass "init/add/run --once → task landed in done/"
else
  echo "--- queue state ---" >&2
  ls -R "$AGENT_QUEUE_ROOT" >&2 || true
  fail "no-op cycle did not complete (expected a file in done/)"
fi

# status must not error
"$AQ" status >/dev/null 2>&1 && pass "status runs clean"

echo "self-test PASS"