apps/api/src/services/ai/mock-provider.ts

import { LLMProvider, OnePagerSchema, PitchDeckSchema, PersonalizedLessonSchema, FeedbackSchema } from './types';
import {
    MOCK_ONE_PAGER_CEREAL, MOCK_ONE_PAGER_FISH, MOCK_ONE_PAGER_COUTURE,
    MOCK_DECK_CEREAL, MOCK_DECK_FISH, MOCK_DECK_COUTURE,
    MOCK_FEEDBACK
} from './__fixtures__/mock-data';

/**
 * A Provider for local development that doesn't require an API Key.
 * It ignores the prompt and returns dummy data matching the requested schema.
 */
export class MockLLMProvider implements LLMProvider {
    async generateStructuredData<T>(prompt: string, schema: any): Promise<T> {
        console.log('[MOCK LLM] Prompt received:', prompt.substring(0, 100) + '...');

        const isFish = prompt.includes('Kayar') || prompt.includes('Poisson') || prompt.includes('transformation');
        const isCereal = prompt.includes('Kaolack') || prompt.includes('Céréales') || prompt.includes('mils');

        if (schema === OnePagerSchema) {
            if (isCereal) return schema.parse(MOCK_ONE_PAGER_CEREAL) as any;
            if (isFish) return schema.parse(MOCK_ONE_PAGER_FISH) as any;
            return schema.parse(MOCK_ONE_PAGER_COUTURE) as any;
        }

        if (schema === PitchDeckSchema) {
            if (isCereal) return schema.parse(MOCK_DECK_CEREAL) as any;
            if (isFish) return schema.parse(MOCK_DECK_FISH) as any;
            return schema.parse(MOCK_DECK_COUTURE) as any;
        }

        if (schema === PersonalizedLessonSchema) {
            return schema.parse({
                lessonText: `Voici une leçon adaptée à votre secteur (${isFish ? 'Poisson' : isCereal ? 'Céréales' : 'Mode'}): Pensez à votre entreprise comme un moteur de valeur locale...`
            }) as any;
        }

        if (schema === FeedbackSchema) {
            return schema.parse(MOCK_FEEDBACK) as any;
        }

        throw new Error("MockLLMProvider does not support this schema.");
    }

    async transcribeAudio(_audioBuffer: Buffer, filename: string): Promise<{ text: string, confidence: number }> {
        console.log(`[MOCK LLM] Transcribing audio from ${filename}...`);
        return { text: "INSCRIPTION", confidence: 100 };
    }

    async generateSpeech(text: string): Promise<Buffer> {
        console.log(`[MOCK LLM] Generating speech for text: ${text.substring(0, 30)}...`);
        return Buffer.from("mock_audio_data");
    }

    async generateImage(prompt: string): Promise<string> {
        console.log(`[MOCK LLM] Generating image for prompt: ${prompt.substring(0, 30)}...`);
        return "https://via.placeholder.com/1024x1024.png?text=Mock+AI+Image";
    }
}