upstream frontend {
    server frontend:3000;
}

upstream backend {
    server backend:8000;
}

upstream mcp {
    server mcp:3100;
}

server {
    listen 80;
    server_name web-inspector.yakenator.io;

    client_max_body_size 10M;

    # MCP 엔드포인트 (Streamable HTTP)
    location /mcp {
        proxy_pass http://mcp;
        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 180s;
        proxy_buffering off;
        proxy_cache off;
        add_header X-Accel-Buffering no;
    }

    # API 요청 → Backend
    location /api/ {
        proxy_pass http://backend;
        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;

        # 타임아웃 (검사 최대 120초)
        proxy_read_timeout 120s;
        proxy_send_timeout 120s;
    }

    # SSE 스트리밍 전용 (모든 검사 타입: 단일/사이트/배치)
    location ~ ^/api/(inspections|site-inspections|batch-inspections)/[^/]+/stream$ {
        proxy_pass http://backend;
        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 Connection '';

        proxy_buffering off;
        proxy_cache off;
        proxy_read_timeout 600s;
        chunked_transfer_encoding off;

        # SSE content type
        add_header Content-Type text/event-stream;
        add_header Cache-Control no-cache;
        add_header X-Accel-Buffering no;
    }

    # 나머지 → Frontend
    location / {
        proxy_pass http://frontend;
        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;

        # Next.js HMR WebSocket (개발 시)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}