#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
OUT_BASE="$ROOT_DIR/.diagnostics"
TS="$(date +%Y%m%d_%H%M%S)"
OUT_DIR="$OUT_BASE/diag_$TS"

mkdir -p "$OUT_DIR"

log() {
  printf '[collect-diagnostics] %s\n' "$1"
}

capture_cmd() {
  local name="$1"
  shift
  {
    echo "# $name"
    echo "# cmd: $*"
    "$@"
  } >"$OUT_DIR/$name.txt" 2>&1 || true
}

log "output: $OUT_DIR"

capture_cmd "env_uname" uname -a
capture_cmd "env_node_version" node --version
capture_cmd "env_npm_version" npm --version
capture_cmd "env_git_status" git -C "$ROOT_DIR" status --short
capture_cmd "env_git_head" git -C "$ROOT_DIR" rev-parse --short HEAD

if [[ -f "$ROOT_DIR/webview.log" ]]; then
  cp "$ROOT_DIR/webview.log" "$OUT_DIR/webview.log" || true
fi

if [[ -f "$ROOT_DIR/backend.log" ]]; then
  cp "$ROOT_DIR/backend.log" "$OUT_DIR/backend.log" || true
fi

if [[ -f "$ROOT_DIR/frontend/package.json" ]]; then
  capture_cmd "frontend_lint" bash -lc "cd '$ROOT_DIR/frontend' && npm run -s lint"
  capture_cmd "frontend_build" bash -lc "cd '$ROOT_DIR/frontend' && npm run -s build"
fi

PY=""
for p in \
  "$ROOT_DIR/.venv312/bin/python3.12" \
  "$ROOT_DIR/.venv312/bin/python" \
  "$ROOT_DIR/.venv/bin/python3" \
  "$ROOT_DIR/.venv/bin/python" \
  "$ROOT_DIR/venv/bin/python3" \
  "$ROOT_DIR/venv/bin/python"; do
  if [[ -x "$p" ]]; then
    PY="$p"
    break
  fi
done

if [[ -n "$PY" ]]; then
  capture_cmd "backend_python_version" "$PY" --version
  capture_cmd "backend_health_check" "$PY" -c "import importlib; importlib.import_module('backend.main'); print('backend import OK')"
fi

capture_cmd "list_recent_files" find "$ROOT_DIR" -maxdepth 2 -type f | head -n 200

if command -v tar >/dev/null 2>&1; then
  tar -czf "$OUT_DIR.tar.gz" -C "$OUT_BASE" "diag_$TS"
  log "archive: $OUT_DIR.tar.gz"
fi

log "done"