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

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
DOMAIN="${KANBAN_DOMAIN:-gahow-pc.ipads-lab.se.sjtu.edu.cn}"
UPSTREAM_PORT="${KANBAN_PORT:-5180}"
ENABLE_HTTP_REDIRECT="${KANBAN_ENABLE_HTTP_REDIRECT:-0}"
GITEA_PORT="${KANBAN_GITEA_PORT:-3443}"
STOCK_FRONTEND_PORT="${KANBAN_STOCK_FRONTEND_PORT:-5443}"
STOCK_API_PORT="${KANBAN_STOCK_API_PORT:-8788}"

if [[ "${EUID}" -ne 0 ]]; then
  exec sudo -E bash "$0" "$@"
fi

mkdir -p /etc/nginx/certs
mkdir -p /var/www/local-kanban-portal
cp "${ROOT_DIR}/deploy/certs/local-kanban.crt" /etc/nginx/certs/gahow-pc.fullchain.pem
cp "${ROOT_DIR}/deploy/certs/local-kanban.key" /etc/nginx/certs/gahow-pc.key
cp "${ROOT_DIR}/portal/index.html" /var/www/local-kanban-portal/index.html
cp "${ROOT_DIR}/portal/portal.css" /var/www/local-kanban-portal/portal.css
rm -f /var/www/local-kanban-portal/portal.js
chmod 600 /etc/nginx/certs/gahow-pc.key

{
cat <<EOF
limit_req_zone \$binary_remote_addr zone=kanban_login:10m rate=5r/m;

EOF

if [[ "${ENABLE_HTTP_REDIRECT}" == "1" ]]; then
cat <<EOF
server {
    listen 80;
    server_name ${DOMAIN};
    return 301 https://\$host\$request_uri;
}

EOF
fi

cat <<EOF
server {
    listen 443 ssl http2;
    server_name ${DOMAIN};
    root /var/www/local-kanban-portal;
    index index.html;

    ssl_certificate /etc/nginx/certs/gahow-pc.fullchain.pem;
    ssl_certificate_key /etc/nginx/certs/gahow-pc.key;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers off;

    add_header Strict-Transport-Security "max-age=31536000" always;
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer" always;

    client_max_body_size 1m;

    location / {
        try_files \$uri \$uri/ /index.html;
    }
}

server {
    listen ${GITEA_PORT} ssl http2;
    server_name ${DOMAIN};

    ssl_certificate /etc/nginx/certs/gahow-pc.fullchain.pem;
    ssl_certificate_key /etc/nginx/certs/gahow-pc.key;
    ssl_protocols TLSv1.2 TLSv1.3;

    location / {
        proxy_pass http://127.0.0.1:3300;
        proxy_http_version 1.1;
        proxy_set_header Host \$host:${GITEA_PORT};
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
    }
}

server {
    listen ${STOCK_FRONTEND_PORT} ssl http2;
    server_name ${DOMAIN};

    ssl_certificate /etc/nginx/certs/gahow-pc.fullchain.pem;
    ssl_certificate_key /etc/nginx/certs/gahow-pc.key;
    ssl_protocols TLSv1.2 TLSv1.3;

    location /api/ {
        proxy_pass http://127.0.0.1:8787;
        proxy_http_version 1.1;
        proxy_set_header Host \$host:${STOCK_FRONTEND_PORT};
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
    }

    location / {
        proxy_pass http://127.0.0.1:5174;
        proxy_http_version 1.1;
        proxy_set_header Host \$host:${STOCK_FRONTEND_PORT};
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header Upgrade \$http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

server {
    listen ${STOCK_API_PORT} ssl http2;
    server_name ${DOMAIN};

    ssl_certificate /etc/nginx/certs/gahow-pc.fullchain.pem;
    ssl_certificate_key /etc/nginx/certs/gahow-pc.key;
    ssl_protocols TLSv1.2 TLSv1.3;

    location / {
        proxy_pass http://127.0.0.1:8787;
        proxy_http_version 1.1;
        proxy_set_header Host \$host:${STOCK_API_PORT};
        proxy_set_header X-Real-IP \$remote_addr;
        proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
    }
}
EOF
} >/etc/nginx/sites-available/local-kanban

ln -sf /etc/nginx/sites-available/local-kanban /etc/nginx/sites-enabled/local-kanban
rm -f /etc/nginx/sites-enabled/default
nginx -t
systemctl reload nginx || systemctl restart nginx

echo "Nginx portal is configured for https://${DOMAIN}/"
echo "Kanban remains available on its own port, for example https://${DOMAIN}:8443/"
echo "Gitea HTTPS is configured for https://${DOMAIN}:${GITEA_PORT}/"
echo "Stock Agent HTTPS is configured for https://${DOMAIN}:${STOCK_FRONTEND_PORT}/"
echo "Stock Agent API HTTPS is configured for https://${DOMAIN}:${STOCK_API_PORT}/"
if [[ "${ENABLE_HTTP_REDIRECT}" != "1" ]]; then
  echo "Port 80 redirect is disabled. Set KANBAN_ENABLE_HTTP_REDIRECT=1 only if port 80 is free."
fi