backend.java

package com.zavachat.backend;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.*;
import org.springframework.stereotype.Service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CompletableFuture;

// ---------------------------------------------------------
// "IMPORTS" FROM LLAMA AND BANANA PRO (Simulated)
// In a real build, these would be dependencies in your pom.xml
// ---------------------------------------------------------
// import com.meta.llama.LlamaModel;
// import com.bananapro.sdk.BananaImageGenerator;

@SpringBootApplication
public class AiBackendApplication {

    public static void main(String[] args) {
        // Powering up the Zava engine!
        SpringApplication.run(AiBackendApplication.class, args);
        System.out.println("☕ Zava Backend is running on port 8080...");
    }
}

/**
 * REST Controller to handle user interactions.
 */
@RestController
@RequestMapping("/api/v1")
@CrossOrigin(origins = "*") // Allow frontend access
class BotController {

    private final LlamaService llamaService;
    private final BananaProImageService bananaService;

    @Autowired
    public BotController(LlamaService llamaService, BananaProImageService bananaService) {
        this.llamaService = llamaService;
        this.bananaService = bananaService;
    }

    /**
     * Endpoint for Chatting (Text-to-Text)
     * Payload: { "prompt": "Hello bot!" }
     */
    @PostMapping("/chat")
    public ResponseEntity<Map<String, String>> chat(@RequestBody Map<String, String> payload) {
        String userPrompt = payload.get("prompt");
        String response = llamaService.generateResponse(userPrompt);
        
        Map<String, String> result = new HashMap<>();
        result.put("reply", response);
        return ResponseEntity.ok(result);
    }

    /**
     * Endpoint for Generating AI Images
     * Payload: { "prompt": "A futuristic city" }
     */
    @PostMapping("/generate-image")
    public ResponseEntity<Map<String, Object>> generateImage(@RequestBody Map<String, String> payload) {
        String prompt = payload.get("prompt");
        
        // Asynchronous call to Banana Pro service
        String imageUrl = bananaService.generateImage(prompt);

        Map<String, Object> result = new HashMap<>();
        result.put("status", "success");
        result.put("image_url", imageUrl);
        result.put("provider", "Banana Pro v1.0");
        
        return ResponseEntity.ok(result);
    }
}

/**
 * Service to handle Text Generation (Simulating Llama integration)
 */
@Service
class LlamaService {

    // Hypothetical Llama Client
    // private final LlamaModel llamaModel = new LlamaModel("llama-3-70b");

    public String generateResponse(String prompt) {
        // Logic to call local Llama model or API would go here.
        // For now, we simulate the intelligence.
        
        System.out.println("🦙 Llama processing: " + prompt);
        
        if (prompt == null || prompt.trim().isEmpty()) {
            return "Even a Llama needs a prompt to spit out wisdom.";
        }

        // Simulating a response
        return "Llama (Zava Edition) says: I have processed '" + prompt + "'. As an AI, I am ready to help.";
    }
}

/**
 * Service to handle Image Generation (Simulating Banana Pro integration)
 */
@Service
class BananaProImageService {

    // Hypothetical Banana Pro Client
    // private final BananaProClient bananaClient = new BananaProClient(apiKey);

    public String generateImage(String prompt) {
        System.out.println("🍌 Banana Pro generating image for: " + prompt);

        // In production, this would make an HTTP POST to the Banana.dev or similar API
        // Example:
        // HttpClient.post("https://api.banana.dev/start/v4/", jsonBody);

        try {
            // Simulate GPU processing time
            Thread.sleep(1500); 
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }

        // Return a mock URL for the generated image
        return "https://api.bananapro.mock/images/gen_" + System.currentTimeMillis() + ".png";
    }
}