server {
    listen 80;
    listen 443 ssl;
    server_name localhost;

    ssl_certificate /etc/nginx/certs/localhost.crt;
    ssl_certificate_key /etc/nginx/certs/localhost.key;

    add_header Access-Control-Allow-Origin $http_origin always;
    add_header Access-Control-Allow-Credentials "true" always;
    add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
    add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization" always;

    # Handle preflight requests generically
    if ($request_method = OPTIONS) {
        return 204;
    }

    # Serve Matrix client well-known metadata
    location /.well-known/matrix/client {
        default_type application/json;
        add_header Access-Control-Allow-Origin $http_origin always;
        add_header Access-Control-Allow-Credentials "true" always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization" always;
        alias /var/www/well-known/matrix-client.json;
    }

    # Optional Matrix server discovery stub (useful for federation later)
    location /.well-known/matrix/server {
        default_type application/json;
        return 200 '{"m.server":"localhost:8008"}';
    }

    # Proxy Matrix Client/Server and Synapse admin APIs to the Synapse container
    location / {
        proxy_pass http://synapse:8008;
        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;
        client_max_body_size 50m;

        # Hide upstream CORS headers and set our own
        proxy_hide_header Access-Control-Allow-Origin;
        proxy_hide_header Access-Control-Allow-Methods;
        proxy_hide_header Access-Control-Allow-Headers;
        proxy_hide_header Access-Control-Expose-Headers;
        add_header Access-Control-Allow-Origin $http_origin always;
        add_header Access-Control-Allow-Credentials "true" always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept, Authorization" always;
    }
}