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// Copyright (c) 2017-2023 Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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// Mock cache backend - responds to GET (match), PUT (put), and PURGE (delete)
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export default {
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  async fetch(request) {
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    const url = new URL(request.url);
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    const headers = new Headers();
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    // Handle cache.match() operations (GET requests)
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    if (request.method === 'GET') {
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      // Check if this is a cache.match() request (has only-if-cached)
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      const cacheControl = request.headers.get('cache-control');
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      if (cacheControl?.includes('only-if-cached')) {
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        // Simulate cache HIT
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        if (url.pathname.includes('cached-resource')) {
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          headers.set('CF-Cache-Status', 'HIT');
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          return new Response('Cached content', { status: 200, headers });
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        }
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        // Simulate cache MISS
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        headers.set('CF-Cache-Status', 'MISS');
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        return new Response(null, { status: 504, headers });
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      }
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    }
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    // Handle cache.put() operations (PUT requests)
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    if (request.method === 'PUT') {
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      // Read the body (which contains the serialized response to cache)
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      await request.text();
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      // Simulate successful cache write
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      return new Response(null, { status: 204 });
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    }
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    // Handle cache.delete() operations (PURGE requests)
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    if (request.method === 'PURGE') {
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      // Simulate successful deletion
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      if (url.pathname.includes('delete-exists')) {
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        return new Response(null, { status: 200 });
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      }
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      // Simulate not found
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      return new Response(null, { status: 404 });
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    }
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    return new Response('Not Found', { status: 404 });
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  },
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};