server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # Gestion des fichiers statiques
    location / {
        try_files $uri $uri/ /index.html;

        # Headers de sécurité
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }

    # Proxy vers sdk_relay WebSocket
    location /ws/ {
        proxy_pass http://sdk_relay_1:8090;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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_read_timeout 86400;
        proxy_send_timeout 86400;
    }

    # Proxy vers sdk_relay HTTP API
    location /api/ {
        proxy_pass http://sdk_relay_1:8091/;
        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;

        # CORS headers
        add_header Access-Control-Allow-Origin "*" always;
        add_header Access-Control-Allow-Methods "GET, POST, OPTIONS, PUT, DELETE" always;
        add_header Access-Control-Allow-Headers "Authorization,Content-Type,Accept,X-Requested-With" always;

        # Gestion des requêtes OPTIONS
        if ($request_method = 'OPTIONS') {
            add_header Access-Control-Allow-Origin "*";
            add_header Access-Control-Allow-Methods "GET, POST, OPTIONS, PUT, DELETE";
            add_header Access-Control-Allow-Headers "Authorization,Content-Type,Accept,X-Requested-With";
            add_header Content-Length 0;
            add_header Content-Type text/plain;
            return 204;
        }
    }

    # Proxy vers Bitcoin Core RPC (si nécessaire)
    location /bitcoin/ {
        proxy_pass http://bitcoin:18443/;
        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;

        # Authentification basique pour Bitcoin RPC
        auth_basic "Bitcoin RPC";
        auth_basic_user_file /etc/nginx/.htpasswd;
    }

    # Proxy vers Blindbit (si nécessaire)
    location /blindbit/ {
        proxy_pass http://blindbit:8000/;
        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;
    }

    # Cache pour les assets statiques
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri =404;
    }

    # Gestion des erreurs
    error_page 404 /index.html;
    error_page 500 502 503 504 /50x.html;

    location = /50x.html {
        root /usr/share/nginx/html;
    }

    # Logs
    access_log /var/log/nginx/ihm_client_access.log;
    error_log /var/log/nginx/ihm_client_error.log;
}