#!/bin/bash
#
# Shahi Kitchen Production Deploy Script
# Run as: sudo -u deploy /var/www/shahikitchen.se/scripts/deploy.sh
#
# This script supports two modes:
# 1. Tarball mode (current primary method): Place new shahi.tar.gz in /tmp or /root and run
# 2. Git mode (if you initialize git in the future)
#
set -euo pipefail

APP_DIR="/var/www/shahikitchen.se"
PM2_APP_NAME="shahikitchen"
PORT=3001

echo "=========================================="
echo "  Shahi Kitchen - Production Deploy"
echo "  $(date)"
echo "=========================================="

cd "$APP_DIR"

# --- Detect mode ---
if [ -f "/tmp/shahi.tar.gz" ] || [ -f "/root/shahi.tar.gz" ]; then
    echo "[1/6] Tarball update detected"
    TARBALL=""
    if [ -f "/tmp/shahi.tar.gz" ]; then TARBALL="/tmp/shahi.tar.gz"; fi
    if [ -f "/root/shahi.tar.gz" ]; then TARBALL="/root/shahi.tar.gz"; fi

    echo "Using tarball: $TARBALL"

    echo "Stopping PM2 app (graceful)..."
    pm2 stop "$PM2_APP_NAME" || true

    echo "Backing up current .next (quick safety)..."
    rm -rf .next.bak 2>/dev/null || true
    cp -a .next .next.bak 2>/dev/null || true

    echo "Extracting new tarball..."
    tar --strip-components=1 -xzf "$TARBALL"

    echo "Cleaning shipped node_modules + cache..."
    rm -rf node_modules .next/cache 2>/dev/null || true

    echo "Running npm ci..."
    npm ci

    echo "Building..."
    npm run build

elif git rev-parse --git-dir > /dev/null 2>&1; then
    echo "[1/6] Git update mode"
    pm2 stop "$PM2_APP_NAME" || true
    git fetch --all
    git reset --hard origin/main || git reset --hard origin/master
    npm ci
    npm run build
else
    echo "ERROR: No tarball found in /tmp or /root, and no git repository."
    echo "Please either:"
    echo "  - scp your new shahi.tar.gz to the server, or"
    echo "  - Run: cp /path/to/shahi.tar.gz /tmp/shahi.tar.gz"
    exit 1
fi

echo "[2/6] Dependencies and build complete"

echo "[3/6] Starting / restarting PM2..."
pm2 start ecosystem.config.cjs --only "$PM2_APP_NAME" || pm2 reload "$PM2_APP_NAME" --update-env || true
pm2 save

echo "[4/6] Reloading Nginx..."
sudo nginx -t && sudo systemctl reload nginx

echo "[5/6] Post-deploy health checks..."
echo "PM2 status:"
pm2 list | grep -E "shahikitchen|App name" || true

echo ""
echo "Testing local Next.js process..."
curl -s --max-time 5 "http://127.0.0.1:${PORT}" | head -c 300 || echo "(first request may be slow)"

echo ""
echo "[6/6] Deploy finished successfully at $(date)"
echo "=========================================="
echo "Website should be live at: http://76.13.210.183"
echo "=========================================="