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services/geminiService.ts

@@ -0,0 +1,53 @@
+import { GoogleGenAI } from "@google/genai";
+
+const getClient = () => {
+  const apiKey = process.env.API_KEY;
+  if (!apiKey) return null;
+  return new GoogleGenAI({ apiKey });
+};
+
+export const generateEmailContent = async (
+  prompt: string, 
+  section: 'header' | 'body' | 'footer'
+): Promise<string> => {
+  const client = getClient();
+  if (!client) {
+    throw new Error("API Key not found");
+  }
+
+  // Model selection based on text task complexity
+  const modelId = 'gemini-2.5-flash';
+
+  const systemInstruction = `
+    You are an expert email marketing developer. 
+    You are generating HTML content for an email template ${section}.
+    
+    RULES:
+    1. Return ONLY the HTML code. Do not include markdown ticks, 'html' labels, or explanations.
+    2. Use inline CSS styles for compatibility.
+    3. Use the Handlebars syntax for placeholders: {{variable_name}}.
+    4. If the user asks for a specific variable, format it correctly.
+    5. For Header: Include logo placeholders or standard menu links if asked.
+    6. For Footer: Include unsubscribe links and copyright info if asked.
+    7. For Body: Focus on clean, readable content.
+  `;
+
+  try {
+    const response = await client.models.generateContent({
+      model: modelId,
+      contents: prompt,
+      config: {
+        systemInstruction: systemInstruction,
+        temperature: 0.7,
+      }
+    });
+
+    let text = response.text || "";
+    // Cleanup if model adds markdown despite instructions
+    text = text.replace(/```html/g, '').replace(/```/g, '').trim();
+    return text;
+  } catch (error) {
+    console.error("Gemini API Error:", error);
+    throw new Error("Failed to generate content");
+  }
+};