#!/usr/bin/env bash

set -e

COMPOSE_OPTIONS="-f docker-compose.beamer-testbed.yml"

# Show usage
show_usage() {
  echo "Usage: $0 {start|stop|logs|console|bash|server|run-migrations} [options]"
  echo ""
  echo "Commands:"
  echo "  start              Build and start all services"
  echo "  stop               Stop all services"
  echo "  logs               Show logs (pass -f to follow)"
  echo "  console [node]     Open Rails console (default: fizzy-01)"
  echo "  bash [node]        Open bash shell (default: fizzy-01)"
  echo "  server             Start web server and beamer using foreman"
  echo "  run-migrations     Wait for beamer, then run migrations if primary"
  exit 1
}

# Get all fizzy-* services from docker compose
get_fizzy_services() {
  fizzy_services=$(docker compose $COMPOSE_OPTIONS config --services | grep '^fizzy-' | sort)

  if [ -z "$fizzy_services" ]; then
    echo "Error: No fizzy-* services found in docker-compose file"
    exit 1
  fi

  echo "$fizzy_services"
}

# Function to wait for a container to be healthy
wait_for_container() {
  local container=$1
  local max_attempts=60
  local attempt=0

  echo "Waiting for $container to be ready..."

  while [ $attempt -lt $max_attempts ]; do
    if docker compose $COMPOSE_OPTIONS exec -T "$container" curl -f -s http://localhost:3000/up >/dev/null 2>&1; then
      echo "$container is ready!"
      return 0
    fi
    attempt=$((attempt + 1))
    echo "$container isn't yet ready on attempt $attempt/$max_attempts"
    sleep 2
  done

  echo "Error: $container failed to become ready after $max_attempts attempts"
  return 1
}

# Function to configure kamal-proxy
# TODO: set up the other containers as read targets
configure_proxy() {
  local writer=$1
  local readers=${@:2}

  echo "Configuring kamal-proxy..."

  local writer_target="$writer:3000"
  local reader_target=""
  for reader in $readers; do
    if [ -n "$reader_target" ]; then
      reader_target+=","
    fi
    reader_target+="$reader:3000"
  done

  docker compose $COMPOSE_OPTIONS exec -T kamal-proxy \
    kamal-proxy deploy fizzy \
    --target $writer_target \
    --read-target $reader_target \
    --host fizzy.localhost

  echo "Configured kamal-proxy with target=${writer_target} and read-target=${reader_target}"
}

# Start command
cmd_start() {
  local fizzy_services=$(get_fizzy_services)
  local first_fizzy=$(echo "$fizzy_services" | head -n 1)

  # Get GitHub token from gh CLI
  echo "Getting GitHub token from gh CLI..."
  export GITHUB_TOKEN=$(gh auth token)

  if [ -z "$GITHUB_TOKEN" ]; then
    echo "Error: Failed to get GitHub token from gh CLI"
    echo "Make sure you're authenticated with: gh auth login"
    exit 1
  fi

  # Create tmp directories with proper permissions
  echo "Creating temporary directories..."
  for service in $fizzy_services; do
    mkdir -p "./tmp/beamer-testbed/$service/storage"
    mkdir -p "./tmp/beamer-testbed/$service/tmp"
  done

  echo "Building Docker image for $first_fizzy..."
  docker compose $COMPOSE_OPTIONS build "$first_fizzy"

  echo "Starting services in detached mode..."
  docker compose $COMPOSE_OPTIONS down
  docker compose $COMPOSE_OPTIONS up -d

  # Wait for and register each fizzy container
  for container in $fizzy_services; do
    wait_for_container "$container"
  done
  configure_proxy $fizzy_services

  echo ""
  echo "All containers are ready and registered!"
  echo "You can access the application at: http://fizzy.localhost:3006"
}

# Stop command
cmd_stop() {
  echo "Stopping services..."
  docker compose $COMPOSE_OPTIONS down
  echo "Services stopped."
}

# Logs command
cmd_logs() {
  docker compose $COMPOSE_OPTIONS logs "$@"
}

# Console command
cmd_console() {
  local node="${1:-fizzy-01}"

  echo "Opening Rails console in $node..."
  docker compose $COMPOSE_OPTIONS exec "$node" bin/rails console
}

# Bash command
cmd_bash() {
  local node="${1:-fizzy-01}"

  echo "Opening bash shell in $node..."
  docker compose $COMPOSE_OPTIONS exec "$node" bash
}

# Server command (runs inside container)
cmd_server() {
  # Check if foreman is installed
  if ! command -v foreman >/dev/null 2>&1; then
    echo "Foreman not found, installing..."
    gem install foreman
  fi

  # Clean up any stale .beamer.sock files
  echo "Cleaning up stale socket files..."
  find . -path '*/.beamer/*/.beamer.sock' -type s -delete 2>/dev/null || true

  mkdir -p ./storage/tenants
  mkdir -p ./storage/untenanted

  echo "Starting web server and beamer with foreman..."
  exec foreman start -f Procfile.beamer-testbed
}

# Run migrations command (runs inside container)
cmd_run_migrations() {
  # Store all arguments as BEAMER_OPTIONS
  BEAMER_OPTIONS="$*"

  echo "Waiting for beamer to be ready..."

  # Wait for beamer status to succeed
  while ! beamer $BEAMER_OPTIONS status >/dev/null 2>&1; do
    echo "Beamer not ready yet, waiting..."
    sleep 1
  done

  echo "Beamer is ready!"
  sleep 1

  # Check if this is the primary node
  if beamer $BEAMER_OPTIONS is-primary; then
    echo "This is the primary node, running migrations..."
    ./bin/rails db:prepare
    echo "Migrations complete!"
  else
    echo "This is not the primary node, skipping migrations."
  fi

  # Wait indefinitely until interrupted
  echo "Waiting indefinitely (press Ctrl-C to exit)..."
  while true; do
    sleep 3600
  done
}

# Main command dispatch
case "${1:-}" in
start)
  cmd_start
  ;;
stop)
  cmd_stop
  ;;
logs)
  shift
  cmd_logs "$@"
  ;;
console)
  shift
  cmd_console "$@"
  ;;
bash)
  shift
  cmd_bash "$@"
  ;;
server)
  cmd_server
  ;;
run-migrations)
  shift
  cmd_run_migrations "$@"
  ;;
*)
  show_usage
  ;;
esac