backend/services/ai/transcribe.js

import { TRANSCRIPTION_PROMPT } from '../../../prompts/transcription.js';

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

export async function transcribe(media, mimeType, apiKey, isOwnApi = false) {
    const models = ['gemini-3-flash-preview', 'gemini-flash-lite-latest'];
    const systemPrompt = TRANSCRIPTION_PROMPT;
    return await tryModels(apiKey, models, async (ai, model) => {
        const response = await ai.models.generateContent({
            model: model,
            contents: { 
                parts: [
                    { inlineData: { data: media, mimeType } }, 
                    { text: "Transcribe accurately and completely. Do not skip any dialogue." }
                ] 
            },
            config: { 
                temperature: 0.1, 
                systemInstruction: systemPrompt, 
                safetySettings: DEFAULT_SAFETY_SETTINGS,
                thinkingConfig: { thinkingBudget: 0 }
            }
        });

        const text = response.text;
        if (!text || text.trim().length < 2) {
             throw new Error("EMPTY_RESPONSE_FROM_MODEL");
        }
        return text;
    });
}