feat: add configurable VPS provider API URLs for emulator testing

- Add LINODE_API_URL and VULTR_API_URL environment variables
- Update LinodeProvider and VultrProvider to accept optional baseUrl
- Update ProvisioningService to pass API URLs to providers
- Add source_provider and source_region_code to PricingWithProvider type
- Use source_provider (linode/vultr) instead of provider_name (Anvil)
- Improve error handling for non-JSON responses in LinodeProvider

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/handlers/provision.ts

@@ -114,7 +114,9 @@ export async function handleProvision(
       env.DB,       // cloud-instances-db
       env.USER_DB,  // telegram-conversations
       env.LINODE_API_KEY,
-      env.VULTR_API_KEY
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     // Provision server

src/handlers/queue.ts

@@ -19,7 +19,9 @@ export async function handleProvisionQueue(
     env.DB,
     env.USER_DB,
     env.LINODE_API_KEY,
-    env.VULTR_API_KEY
+    env.VULTR_API_KEY,
+    env.LINODE_API_URL,
+    env.VULTR_API_URL
   );
 
   for (const message of batch.messages) {

src/services/linode-provider.ts

@@ -26,10 +26,12 @@ interface LinodeError {
 }
 
 export class LinodeProvider extends VPSProviderBase {
-  constructor(apiKey: string, timeout: number = 30000) {
+  static readonly DEFAULT_BASE_URL = 'https://api.linode.com/v4';
+
+  constructor(apiKey: string, baseUrl?: string, timeout: number = 30000) {
     super({
       apiKey,
-      baseUrl: 'https://api.linode.com/v4',
+      baseUrl: baseUrl || LinodeProvider.DEFAULT_BASE_URL,
       timeout,
     });
   }
@@ -58,18 +60,32 @@ export class LinodeProvider extends VPSProviderBase {
         body: JSON.stringify(body),
       });
 
+      // Read response text first to handle both JSON and HTML errors
+      const responseText = await response.text();
+
       if (!response.ok) {
-        const error = (await response.json()) as LinodeError;
-        return {
-          success: false,
-          error: {
-            code: `LINODE_${response.status}`,
-            message: error.errors?.[0]?.reason || 'Unknown error',
-          },
-        };
+        // Try to parse as JSON, but handle HTML responses gracefully
+        try {
+          const error = JSON.parse(responseText) as LinodeError;
+          return {
+            success: false,
+            error: {
+              code: `LINODE_${response.status}`,
+              message: error.errors?.[0]?.reason || 'Unknown error',
+            },
+          };
+        } catch {
+          return {
+            success: false,
+            error: {
+              code: `LINODE_${response.status}`,
+              message: `Non-JSON response: ${responseText.substring(0, 200)}`,
+            },
+          };
+        }
       }
 
-      const data = (await response.json()) as LinodeInstance;
+      const data = JSON.parse(responseText) as LinodeInstance;
 
       return {
         success: true,

src/services/provisioning-service.ts

@@ -20,12 +20,14 @@ export class ProvisioningService {
     db: D1Database,        // cloud-instances-db: pricing, providers
     userDb: D1Database,    // telegram-conversations: users, deposits, orders
     linodeApiKey?: string,
-    vultrApiKey?: string
+    vultrApiKey?: string,
+    linodeApiUrl?: string, // Optional: for testing with emulator
+    vultrApiUrl?: string   // Optional: for testing with emulator
   ) {
     this.env = env;
     this.repo = new ProvisioningRepository(db, userDb);
-    this.linodeProvider = linodeApiKey ? new LinodeProvider(linodeApiKey) : null;
-    this.vultrProvider = vultrApiKey ? new VultrProvider(vultrApiKey) : null;
+    this.linodeProvider = linodeApiKey ? new LinodeProvider(linodeApiKey, linodeApiUrl) : null;
+    this.vultrProvider = vultrApiKey ? new VultrProvider(vultrApiKey, vultrApiUrl) : null;
   }
 
   /**

src/services/vultr-provider.ts

@@ -36,10 +36,12 @@ interface VultrError {
 }
 
 export class VultrProvider extends VPSProviderBase {
-  constructor(apiKey: string, timeout: number = 30000) {
+  static readonly DEFAULT_BASE_URL = 'https://api.vultr.com/v2';
+
+  constructor(apiKey: string, baseUrl?: string, timeout: number = 30000) {
     super({
       apiKey,
-      baseUrl: 'https://api.vultr.com/v2',
+      baseUrl: baseUrl || VultrProvider.DEFAULT_BASE_URL,
       timeout,
     });
   }

src/types.ts

@@ -12,6 +12,9 @@ export interface Env {
   // VPS Provider API Keys
   LINODE_API_KEY?: string;
   VULTR_API_KEY?: string;
+  // VPS Provider API URLs (for testing with emulators)
+  LINODE_API_URL?: string;  // Default: https://api.linode.com/v4
+  VULTR_API_URL?: string;   // Default: https://api.vultr.com/v2
   // Provision API security
   PROVISION_API_KEY?: string;  // Required for /api/provision/* endpoints
   // Queue for async provisioning

wrangler.toml

@@ -39,3 +39,9 @@ queue = "provision-queue"
 max_batch_size = 1
 max_retries = 3
 dead_letter_queue = "provision-queue-dlq"
+
+# VPS Provider API URLs (for testing with emulators)
+# Comment out or remove for production to use default URLs
+[vars]
+LINODE_API_URL = "https://linode.actions.it.com/v4"
+VULTR_API_URL = "https://vultr.actions.it.com/v2"