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

SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
REPO_ROOT=$(cd -- "$SCRIPT_DIR/.." && pwd)
default_instance=$(basename -- "$REPO_ROOT" | tr '[:upper:]_' '[:lower:]-')
instance=${1:-$default_instance}

if [[ ${#instance} -gt 42 || ! $instance =~ ^[a-z0-9]([a-z0-9-]*[a-z0-9])?$ ]]; then
  echo "instance must be 1-42 lowercase letters, digits, or internal hyphens: $instance" >&2
  exit 2
fi

namespace=${DEV_NAMESPACE:-vibes}
shared_root=${DEV_SHARED_ROOT:-/data/live}
destination="$shared_root/$instance"
state_dir="$shared_root/.hello-dev-state"
pid_file="$state_dir/$instance.pid"
log_file="$state_dir/$instance.log"
label="dev.mancave.link/instance=$instance"

if [[ $shared_root != /* || $shared_root == / ]]; then
  echo "DEV_SHARED_ROOT must be an absolute directory below /: $shared_root" >&2
  exit 2
fi

if [[ -f $pid_file ]]; then
  sync_pid=$(<"$pid_file")
  process_command=""
  if [[ $sync_pid =~ ^[0-9]+$ && -r /proc/$sync_pid/cmdline ]]; then
    process_command=$(tr '\0' ' ' <"/proc/$sync_pid/cmdline")
  fi
  if [[ $process_command == *"start.sh __sync $instance "* ]]; then
    kill "$sync_pid"
    for _ in {1..20}; do
      kill -0 "$sync_pid" 2>/dev/null || break
      sleep 0.1
    done
    kill -9 "$sync_pid" 2>/dev/null || true
  fi
fi

kubectl delete all,ingress,configmap,secret,pvc \
  --namespace "$namespace" \
  --selector "$label" \
  --ignore-not-found=true \
  --wait=true

if [[ -d $destination ]]; then
  find "$destination" -depth -delete
fi
rm -f -- "$pid_file" "$log_file"
rmdir -- "$state_dir" 2>/dev/null || true

echo "Development instance '$instance' was permanently removed"