server {
    listen 80;
    server_name _;

    # /health pe HTTP — pentru healthcheck fără TLS
    location = /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

    # Docker DNS pentru upstream-uri dinamice
    resolver 127.0.0.11 valid=30s;

    # ── API + auth pe HTTP simplu (aplicația mobilă pe LAN nu acceptă
    #    certificatul self-signed; SPA-ul web rămâne pe HTTPS) ──
    location ^~ /api/ {
        set $kong_upstream didi-kong;
        proxy_pass http://$kong_upstream:8000;
        proxy_http_version 1.1;
        proxy_set_header Host localhost;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 660s;
        proxy_send_timeout 660s;
        proxy_connect_timeout 10s;
    }

    location ^~ /agent-v3/ {
        set $kong_upstream didi-kong;
        proxy_pass http://$kong_upstream:8000;
        proxy_http_version 1.1;
        proxy_set_header Host localhost;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_read_timeout 660s;
        proxy_send_timeout 660s;
        proxy_connect_timeout 10s;
    }

    location ^~ /auth/ {
        set $kc_upstream didi-keycloak;
        proxy_pass http://$kc_upstream:8080;
        proxy_http_version 1.1;
        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 http;
        proxy_set_header X-Forwarded-Port 80;
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }

    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl;
    server_name _;
    http2 on;

    # Self-signed cert (Keycloak PKCE cere Web Crypto = secure context)
    ssl_certificate     /etc/nginx/ssl/server.crt;
    ssl_certificate_key /etc/nginx/ssl/server.key;
    ssl_protocols TLSv1.2 TLSv1.3;

    root /usr/share/nginx/html;
    index index.html;

    # Upload-uri mari (video până la 500MB)
    client_max_body_size 500M;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript
               application/x-javascript application/xml+rss
               application/javascript application/json;

    # Security headers
    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 "no-referrer-when-downgrade" always;

    # Docker DNS — upstream-urile se rezolvă dinamic (rezistă la restart de containere)
    resolver 127.0.0.11 valid=30s;

    # ============================================================
    # Same-origin către stack-ul local (didi-network):
    #   /api/*      -> Kong (rutele Kong sunt host-bound; trimitem Host: localhost)
    #   /agent-v3/* -> Kong
    #   /auth/*     -> Keycloak (prefixul /auth e nativ în instalare)
    # ============================================================
    location ^~ /api/ {
        set $kong_upstream didi-kong;
        proxy_pass http://$kong_upstream:8000;
        proxy_http_version 1.1;
        proxy_set_header Host localhost;
        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 X-Forwarded-Host $host;
        # Procesarea video poate dura până la 11 min
        proxy_read_timeout 660s;
        proxy_send_timeout 660s;
        proxy_connect_timeout 10s;
    }

    location ^~ /agent-v3/ {
        set $kong_upstream didi-kong;
        proxy_pass http://$kong_upstream:8000;
        proxy_http_version 1.1;
        proxy_set_header Host localhost;
        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 X-Forwarded-Host $host;
        proxy_read_timeout 660s;
        proxy_send_timeout 660s;
        proxy_connect_timeout 10s;
    }

    location ^~ /auth/ {
        set $kc_upstream didi-keycloak;
        proxy_pass http://$kc_upstream:8080;
        proxy_http_version 1.1;
        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 https;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port 443;
        # Buffere pentru headerele mari Keycloak (JWT)
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }

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

    # Main application — SPA fallback (catch-all LAST)
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Health check endpoint
    location = /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

    # Error pages
    error_page 404 /index.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }
}