backend/services/ai/creator.js

import { CONTENT_CREATOR_PROMPT } from '../../../prompts/contentCreator.js';

import { tryModels, getPrompt, DEFAULT_SAFETY_SETTINGS } from '@/backend/services/ai/utils';

export async function contentCreator(topic, category, subTopics, contentType, gender, targetLang, apiKey, isOwnApi = false) {
    const models = ['gemini-3-flash-preview', 'gemini-flash-lite-latest'];
    const isBurmese = targetLang.toLowerCase().includes('burm') || targetLang.includes('မြန်မာ');
    const finalPrompt = CONTENT_CREATOR_PROMPT(topic, category, subTopics, contentType, gender, targetLang);
    return await tryModels(apiKey, models, async (ai, model) => {
        const response = await ai.models.generateContent({ 
            model, 
            contents: [{ parts: [{ text: `Topic: ${topic}. Category: ${category}.` }] }], 
            config: { temperature: 0.8, systemInstruction: finalPrompt, safetySettings: DEFAULT_SAFETY_SETTINGS } 
        });
        return response.text;
    });
}

export async function generateImage(prompt, apiKey, isOwnApi = false) {
    const models = ['gemini-2.5-flash-image', 'gemini-3-pro-image-preview'];
    
    // Improved visual prompt for better generation
    const visualPrompt = `High-quality cinematic illustrative 3D character design or scene showing: ${prompt}. Vivid colors, detailed environment, 8k resolution style.`;

    return await tryModels(apiKey, models, async (ai, model) => {
        const response = await ai.models.generateContent({
            model: model,
            contents: { 
                parts: [
                    { text: visualPrompt }
                ] 
            },
            config: { 
                imageConfig: { aspectRatio: "1:1" }
            }
        });

        // Thoroughly check all candidates and parts for inlineData
        for (const candidate of response.candidates || []) {
            for (const part of candidate.content?.parts || []) {
                if (part.inlineData) {
                    return `data:image/png;base64,${part.inlineData.data}`;
                }
            }
        }
        
        throw new Error("EMPTY_IMAGE_DATA_RESPONSE");
    });
}