#!/bin/bash
set -euo pipefail

## Discourse Installation Script for Netcup RS 8000
## Run this ON the Netcup server: ssh netcup "bash -s" < scripts/install.sh
## Or: ssh netcup, then cd /opt/discourse && bash scripts/install.sh

DISCOURSE_DIR="/opt/discourse"
REPO_URL="https://github.com/discourse/discourse_docker.git"

echo "=== Discourse Installation for cadCAD Community Forum ==="
echo ""

# 1. Check for swap (Discourse needs it for 2GB RAM limit)
echo "[1/6] Checking swap space..."
SWAP_TOTAL=$(free -m | awk '/^Swap:/ {print $2}')
if [ "$SWAP_TOTAL" -lt 2000 ]; then
    echo "  WARNING: Less than 2GB swap detected (${SWAP_TOTAL}MB)."
    echo "  Creating 2GB swap file..."
    if [ ! -f /swapfile ]; then
        fallocate -l 2G /swapfile
        chmod 600 /swapfile
        mkswap /swapfile
        swapon /swapfile
        echo '/swapfile none swap sw 0 0' >> /etc/fstab
        echo "  Swap file created and enabled."
    else
        echo "  /swapfile already exists. Enabling if not active..."
        swapon /swapfile 2>/dev/null || true
    fi
else
    echo "  Swap OK: ${SWAP_TOTAL}MB"
fi

# 2. Clone discourse_docker
echo ""
echo "[2/6] Setting up Discourse Docker..."
if [ -d "$DISCOURSE_DIR/.git" ]; then
    echo "  discourse_docker already cloned at $DISCOURSE_DIR"
    cd "$DISCOURSE_DIR"
    git pull
else
    echo "  Cloning discourse_docker..."
    git clone "$REPO_URL" "$DISCOURSE_DIR"
    cd "$DISCOURSE_DIR"
fi

# 3. Copy app.yml config
echo ""
echo "[3/6] Installing app.yml configuration..."
if [ -f "containers/app.yml" ]; then
    echo "  Backing up existing app.yml to containers/app.yml.backup"
    cp containers/app.yml "containers/app.yml.backup.$(date +%Y%m%d%H%M%S)"
fi

# The app.yml should already be in the repo root from our config
if [ -f "app.yml" ]; then
    cp app.yml containers/app.yml
    echo "  app.yml copied to containers/"
else
    echo "  ERROR: app.yml not found in repo root."
    echo "  Please copy it manually: cp /path/to/app.yml containers/app.yml"
    exit 1
fi

# 4. Ensure traefik-public network exists
echo ""
echo "[4/6] Checking Docker networks..."
if docker network inspect traefik-public >/dev/null 2>&1; then
    echo "  traefik-public network exists."
else
    echo "  Creating traefik-public network..."
    docker network create traefik-public
fi

# 5. Bootstrap Discourse (this takes 5-10 minutes)
echo ""
echo "[5/6] Bootstrapping Discourse container..."
echo "  This will take 5-10 minutes. Building image and precompiling assets..."
echo ""
./launcher bootstrap app

# 6. Start and connect to Traefik network
echo ""
echo "[6/6] Starting Discourse and connecting to Traefik..."
./launcher start app

# Connect to traefik-public network
CONTAINER_ID=$(docker ps -q -f name=app)
if [ -n "$CONTAINER_ID" ]; then
    docker network connect traefik-public "$CONTAINER_ID" 2>/dev/null || echo "  Already connected to traefik-public"
    echo "  Container connected to traefik-public network."
else
    echo "  WARNING: Could not find running discourse container."
fi

echo ""
echo "=== Discourse Installation Complete ==="
echo ""
echo "Next steps:"
echo "  1. Add cadcad-forum.jeffemmett.com to Cloudflare tunnel"
echo "  2. Create admin account:"
echo "     cd /opt/discourse && ./launcher enter app"
echo "     rake admin:create"
echo "  3. Configure SMTP in containers/app.yml when ready"
echo "  4. Visit https://cadcad-forum.jeffemmett.com"
echo ""
echo "Useful commands:"
echo "  ./launcher logs app        # View logs"
echo "  ./launcher restart app     # Restart"
echo "  ./launcher rebuild app     # Rebuild after config changes"
echo "  ./launcher enter app       # Shell into container"
echo "  ./launcher stop app        # Stop"