map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

upstream web {
    server unix:/run/mastodon-web/mastodon-web.sock fail_timeout=0;
}

upstream streaming {
    # Instruct nginx to send connections to the server with the least number of connections
    # to ensure load is distributed evenly.
    least_conn;

    server unix:/run/mastodon-streaming/mastodon-streaming.sock fail_timeout=0;
    # Uncomment these lines for load-balancing multiple instances of streaming for scaling,
    # this assumes your running the streaming server on ports 4000, 4001, and 4002:
    # server 127.0.0.1:4001 fail_timeout=0;
    # server 127.0.0.1:4002 fail_timeout=0;
}

proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=CACHE:10m inactive=7d max_size=1g;

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name social.exozy.me;

    keepalive_timeout 70;
    sendfile on;
    client_max_body_size 99m;

    root /var/lib/mastodon/public;

    gzip on;
    gzip_disable "msie6";
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml image/x-icon;

    location / {
        try_files $uri @proxy;
    }

    # If Docker is used for deployment and Rails serves static files,
    # then needed must replace line `try_files $uri =404;` with `try_files $uri @proxy;`.
    location = /sw.js {
        add_header Cache-Control "public, max-age=604800, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/assets/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/avatars/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/emoji/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/headers/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/packs/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/shortcuts/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/sounds/ {
        add_header Cache-Control "public, max-age=2419200, must-revalidate";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        try_files $uri =404;
    }

    location ~ ^/system/ {
        add_header Cache-Control "public, max-age=2419200, immutable";
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";
        add_header X-Content-Type-Options nosniff;
        add_header Content-Security-Policy "default-src 'none'; form-action 'none'";
        try_files $uri =404;
    }

    location ^~ /api/v1/streaming {
        proxy_set_header Host $host;
        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 $scheme;
        proxy_set_header Proxy "";

        proxy_pass http://streaming;
        proxy_buffering off;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains";

        tcp_nodelay on;
    }

    location @proxy {
        proxy_set_header Host $host;
        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 $scheme;
        proxy_set_header Proxy "";
        proxy_pass_header Server;

        proxy_pass http://web;
        proxy_buffering on;
        proxy_redirect off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;

        proxy_cache CACHE;
        proxy_cache_valid 200 7d;
        proxy_cache_valid 410 24h;
        proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
        add_header X-Cached $upstream_cache_status;

        tcp_nodelay on;
    }

    error_page 404 500 501 502 503 504 /500.html;
}