# nginx default.conf — Vue3 SPA (history mode) + /api reverse proxy to backend
# Mounted at /etc/nginx/conf.d/default.conf by the frontend Dockerfile.
# Spec §10: client_max_body_size 50m (ingest payloads can be large; Express limit is 50mb).

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

    # Spec §10 reliability: allow large ingest payloads up to 50m.
    client_max_body_size 50m;

    # Defense-in-depth: don't leak the nginx version in Server: headers / error pages.
    server_tokens off;

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

    # ---- gzip: text assets over the wire ----
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 5;
    gzip_types
        text/plain
        text/css
        text/xml
        application/json
        application/javascript
        text/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml
        font/ttf
        font/otf
        font/woff
        font/woff2;

    # ---- API reverse proxy: /api/* -> http://backend:8080/api/* ----
    # No trailing slash on proxy_pass => the /api prefix is preserved, so
    # /api/health -> http://backend:8080/api/health.
    location /api/ {
        proxy_pass http://backend: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 $scheme;
        # Clear Connection so upstream keep-alive isn't disabled by client headers.
        proxy_set_header Connection        "";

        # Backend has some slow queries; give them room.
        proxy_connect_timeout 10s;
        proxy_send_timeout    60s;
        proxy_read_timeout    60s;
    }

    # ---- Hashed static assets: long immutable cache ----
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, max-age=31536000, immutable";
        access_log off;
    }

    # ---- SPA history-mode fallback (CRITICAL) ----
    # vue-router uses createWebHistory, so deep links like /inquiries or
    # /inquiries/:id MUST fall back to index.html instead of 404.
    location / {
        try_files $uri $uri/ /index.html;
    }

    # index.html itself should never be aggressively cached, so deploys take
    # effect immediately (the asset files it references are content-hashed).
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        expires off;
    }
}