#!/bin/bash
# Project Tracker - One-shot deploy script
# Run on a fresh Debian/Ubuntu server as root

set -e

echo ""
echo "╔═══════════════════════════════════════════════╗"
echo "║       Project Tracker — Deploy Script         ║"
echo "╚═══════════════════════════════════════════════╝"
echo ""

# Check if running as root
if [ "$EUID" -ne 0 ]; then
  echo "ERROR: Please run as root: sudo $0"
  exit 1
fi

# Detect OS
if ! command -v apt-get &> /dev/null; then
  echo "ERROR: This script requires Debian/Ubuntu."
  exit 1
fi

# Require curl
if ! command -v curl &> /dev/null; then
  echo "ERROR: curl is required but not installed."
  echo ""
  echo "Install it with:"
  echo "  apt-get install curl"
  echo ""
  echo "Then run this command again:"
  echo "  curl -sL https://gitea.ledrew.me/ledadmin/project-tracker/raw/branch/master/deploy/setup.sh | bash"
  exit 1
fi

# Check for Docker
DOCKER_INSTALLED=false
if command -v docker &> /dev/null; then
  DOCKER_INSTALLED=true
  DOCKER_VERSION=$(docker --version 2>/dev/null | awk '{print $3}' | tr -d ',')
fi

# Check for docker-compose plugin
COMPOSE_INSTALLED=false
if docker compose version &> /dev/null; then
  COMPOSE_INSTALLED=true
fi

# Check if repo already exists
REPO_DIR="/root/project-tracker"
REPO_EXISTS=false
if [ -d "$REPO_DIR" ]; then
  REPO_EXISTS=true
fi

# Show pre-flight
echo "Pre-flight check:"
echo "  OS:          $(lsb_release -ds 2>/dev/null || cat /etc/os-release | grep PRETTY_NAME | cut -d'"' -f2)"
echo "  Docker:      ${DOCKER_INSTALLED:+$DOCKER_VERSION (installed)}"
echo "  Compose:     ${COMPOSE_INSTALLED:+installed}"
echo "  Repo dir:    ${REPO_EXISTS:+WARNING — $REPO_DIR already exists (will git pull)}"
echo ""

echo "This script will:"
echo "  1. Update system packages"
echo "  2. Install Docker (if not present)"
echo "  3. Clone/pull the Project Tracker repo to $REPO_DIR"
echo "  4. Build and start the app via Docker Compose"
echo ""
echo "Container ports used:"
echo "  Port 80 — Web UI + API"
echo ""
echo "Data: SQLite database is stored in a Docker named volume."
echo "      Use 'docker compose down -v' to DELETE the database."
echo ""

# Confirm — if stdin is a TTY, ask interactively. Otherwise auto-proceed after 5s.
if [ -t 0 ]; then
  echo -n "Continue? [Y/n]: "
  read -r CONFIRM
  CONFIRM=${CONFIRM:-Y}
  if [ "$CONFIRM" != "Y" ] && [ "$CONFIRM" != "y" ]; then
    echo "Aborted."
    exit 0
  fi
else
  echo -n "Continue? [Y/n] (auto-proceeding in 5s): "
  read -r -t 5 CONFIRM 2>/dev/null || true
  CONFIRM=${CONFIRM:-Y}
  if [ "$CONFIRM" != "Y" ] && [ "$CONFIRM" != "y" ]; then
    echo "Aborted."
    exit 0
  fi
fi

echo ""
echo "=== Starting deploy ==="
echo ""

# Update system
echo "[1/4] Updating system packages..."
rm -f /etc/apt/sources.list.d/docker.list 2>/dev/null || true
apt-get update -qq 2>/dev/null || apt-get update
apt-get install -y -qq curl git ca-certificates gnupg > /dev/null 2>&1

# Install Docker
echo "[2/4] Installing Docker..."
if [ "$DOCKER_INSTALLED" = "true" ] && [ "$COMPOSE_INSTALLED" = "true" ]; then
  echo "  Docker and Docker Compose already installed — skipping."
else
  if [ "$DOCKER_INSTALLED" = "false" ]; then
    echo "  Installing docker.io from Debian repos..."
    apt-get install -y -qq docker.io > /dev/null 2>&1 || {
      echo "  ERROR: Could not install docker.io."
      exit 1
    }
    echo "  docker.io installed."
  else
    echo "  Docker already installed ($DOCKER_VERSION)."
  fi

  if [ "$COMPOSE_INSTALLED" = "false" ]; then
    echo "  Installing docker-compose-plugin..."
    apt-get install -y -qq docker-compose-plugin > /dev/null 2>&1 || {
      echo "  ERROR: Could not install docker-compose-plugin."
      exit 1
    }
    echo "  docker-compose-plugin installed."
  else
    echo "  Docker Compose already installed."
  fi

  systemctl enable docker --now > /dev/null 2>&1 || true
fi

# Clone or update repo
echo "[3/4] Setting up Project Tracker..."
if [ "$REPO_EXISTS" = "true" ]; then
  echo "  Pulling latest changes into existing repo..."
  cd "$REPO_DIR"
  git pull
else
  echo "  Cloning repo..."
  git clone https://gitea.ledrew.me/ledadmin/project-tracker.git "$REPO_DIR"
  cd "$REPO_DIR"
fi

# Build and start
echo "[4/4] Building and starting containers..."
cd "$REPO_DIR/deploy"
docker compose down --remove-orphans 2>/dev/null || true
docker compose up -d --build

# Wait for backend
echo "Waiting for backend to start..."
sleep 4

# Verify
IP=$(hostname -I 2>/dev/null | awk '{print $1}' || echo "localhost")
HTTP_OK=$(curl -sf -o /dev/null -w "%{http_code}" http://localhost/api/projects 2>/dev/null || echo "000")

echo ""
echo "=== Deploy complete ==="
if [ "$HTTP_OK" = "200" ]; then
  echo "Project Tracker is LIVE at http://$IP"
else
  echo "App started — verify at http://$IP"
  echo "(Backend may still be initializing, give it a few seconds)"
fi
echo ""
echo "Useful commands:"
echo "  cd $REPO_DIR/deploy"
echo "  docker compose logs -f        # View logs"
echo "  docker compose restart        # Restart"
echo "  docker compose down           # Stop"
echo "  docker compose down -v        # Stop and DELETE database (CAREFUL!)"
echo ""