# Office Translator - Local Nginx Config (HTTP only, no SSL)
# Used by: docker-compose.local.yml
# Upstreams (backend, frontend) and rate limit zones are defined in nginx.conf

server {
    listen 80;
    listen [::]:80;
    server_name _;

    # File upload size
    client_max_body_size 100M;
    client_body_timeout 300s;

    # Proxy settings
    proxy_connect_timeout 60s;
    proxy_send_timeout 300s;
    proxy_read_timeout 300s;
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;

    # API routes -> Backend
    location /api/ {
        limit_req zone=api_limit burst=20 nodelay;
        limit_conn conn_limit 10;

        proxy_pass http://backend;
        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 $scheme;
        proxy_set_header Connection "";

        # CORS headers
        add_header Access-Control-Allow-Origin $cors_origin always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "Authorization, Content-Type, X-Requested-With, X-API-Key" always;
        add_header Access-Control-Allow-Credentials "true" always;

        if ($request_method = 'OPTIONS') {
            return 204;
        }
    }

    # File upload / translate endpoint
    location /translate {
        limit_req zone=upload_limit burst=5 nodelay;
        limit_conn conn_limit 5;

        proxy_pass http://backend/translate;
        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 $scheme;

        proxy_connect_timeout 60s;
        proxy_send_timeout 600s;
        proxy_read_timeout 600s;
    }

    # Health check endpoint
    location /health {
        proxy_pass http://backend/health;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
    }

    # Readiness check
    location /ready {
        proxy_pass http://backend/ready;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
    }

    # OpenAPI docs
    location /docs {
        proxy_pass http://backend/docs;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
    }

    location /redoc {
        proxy_pass http://backend/redoc;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
    }

    location /openapi.json {
        proxy_pass http://backend/openapi.json;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
    }

    # Admin UI -> Frontend (Next.js page)
    location /admin {
        proxy_pass http://frontend;
        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 $scheme;
    }

    # Frontend static assets with caching
    location /_next/static/ {
        proxy_pass http://frontend;
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Frontend -> Next.js
    location / {
        proxy_pass http://frontend;
        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 $scheme;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}