# SecureBit.chat - Apache Configuration
# Comprehensive caching configuration for forced updates

# ============================================
# MIME TYPES - MUST BE FIRST (before other rules)
# ============================================
# Critical: Set MIME types BEFORE any other rules to ensure correct Content-Type headers
<IfModule mod_mime.c>
    # JavaScript modules - explicit order matters
    AddType application/javascript .jsx
    AddType application/javascript .mjs
    AddType application/javascript .js
    AddType application/json .json
    
    # Fonts
    AddType font/woff .woff
    AddType font/woff2 .woff2
    AddType application/font-woff .woff
    AddType application/font-woff2 .woff2
    
    # Service Worker
    AddType application/manifest+json .webmanifest
</IfModule>

# Force Content-Type headers (override any server defaults)
<IfModule mod_headers.c>
    # All JavaScript files including JSX - CRITICAL for ES modules
    <FilesMatch "\.(js|mjs|jsx)$">
        Header always set Content-Type "application/javascript; charset=utf-8"
    </FilesMatch>
</IfModule>

# Enable mod_rewrite
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
</IfModule>

# ============================================
# CRITICAL FILES - NO CACHING
# ============================================

# meta.json - versioning file (never cache)
<FilesMatch "meta\.json$">
    <IfModule mod_headers.c>
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
        Header set Pragma "no-cache"
        Header set Expires "0"
        Header set X-Content-Type-Options "nosniff"
    </IfModule>
</FilesMatch>

# HTML files - always fresh
<FilesMatch "\.(html|htm)$">
    <IfModule mod_headers.c>
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
        Header set Pragma "no-cache"
        Header set Expires "0"
        # Remove ETag for validation
        Header unset ETag
        FileETag None
    </IfModule>
</FilesMatch>

# Service Worker - no cache
<FilesMatch "sw\.js$">
    <IfModule mod_headers.c>
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
        Header set Pragma "no-cache"
        Header set Expires "0"
        Header set Service-Worker-Allowed "/"
    </IfModule>
</FilesMatch>

# manifest.json - no cache
<FilesMatch "manifest\.json$">
    <IfModule mod_headers.c>
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
        Header set Pragma "no-cache"
        Header set Expires "0"
    </IfModule>
</FilesMatch>

# ============================================
# STATIC RESOURCES - AGGRESSIVE CACHING
# ============================================

# JavaScript files in dist/ - no cache (for updates)
<FilesMatch "^dist/.*\.(js|mjs)$">
    <IfModule mod_headers.c>
        Header set Cache-Control "no-cache, no-store, must-revalidate, max-age=0"
        Header set Pragma "no-cache"
        Header set Expires "0"
        Header set X-Content-Type-Options "nosniff"
    </IfModule>
</FilesMatch>

# JavaScript files with hashes in other locations - long cache
<FilesMatch "\.(js|mjs)$">
    <IfModule mod_headers.c>
        # Files with hashes in name - cache for one year
        Header set Cache-Control "public, max-age=31536000, immutable"
        Header set X-Content-Type-Options "nosniff"
    </IfModule>
</FilesMatch>

# CSS files - long cache
<FilesMatch "\.css$">
    <IfModule mod_headers.c>
        Header set Cache-Control "public, max-age=31536000, immutable"
    </IfModule>
</FilesMatch>

# Images - long cache
<FilesMatch "\.(jpg|jpeg|png|gif|webp|svg|ico)$">
    <IfModule mod_headers.c>
        Header set Cache-Control "public, max-age=31536000, immutable"
    </IfModule>
</FilesMatch>

# Fonts - long cache
<FilesMatch "\.(woff|woff2|ttf|otf|eot)$">
    <IfModule mod_headers.c>
        Header set Cache-Control "public, max-age=31536000, immutable"
        Header set Access-Control-Allow-Origin "*"
    </IfModule>
</FilesMatch>

# Audio/Video - long cache
<FilesMatch "\.(mp3|mp4|webm|ogg)$">
    <IfModule mod_headers.c>
        Header set Cache-Control "public, max-age=31536000, immutable"
    </IfModule>
</FilesMatch>

# ============================================
# SECURITY
# ============================================

# XSS Protection
<IfModule mod_headers.c>
    Header set X-XSS-Protection "1; mode=block"
    Header set X-Content-Type-Options "nosniff"
    Header set Referrer-Policy "strict-origin-when-cross-origin"
    Header set X-Frame-Options "DENY"
</IfModule>

# Content Security Policy (frame-ancestors and report-uri only work in HTTP headers, not meta tags)
<IfModule mod_headers.c>
    Header set Content-Security-Policy "frame-ancestors 'none'; report-uri /csp-report; report-to csp-endpoint;"
</IfModule>

# ============================================
# GZIP COMPRESSION
# ============================================

<IfModule mod_deflate.c>
    # Compress text files
    AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript application/json application/xml
    
    # Compress fonts
    AddOutputFilterByType DEFLATE font/woff font/woff2 application/font-woff application/font-woff2
</IfModule>


# ============================================
# CLOUDFLARE RULES
# ============================================

# Cloudflare can cache static files, but should not cache:
# - meta.json
# - index.html
# - sw.js
# - manifest.json

# These rules are applied at Cloudflare Page Rules level
# (see CLOUDFLARE_SETUP.md documentation)

# ============================================
# SPA FALLBACK
# ============================================

# If file not found, redirect to index.html (for SPA routing)
<IfModule mod_rewrite.c>
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} !^/meta\.json$
    RewriteCond %{REQUEST_URI} !^/sw\.js$
    RewriteCond %{REQUEST_URI} !^/manifest\.json$
    RewriteRule ^(.*)$ /index.html [L]
</IfModule>

# ============================================
# LOGGING (optional)
# ============================================

# Uncomment for debugging
# LogLevel rewrite:trace3