import { env } from '$env/dynamic/public';

const API_BASE = env.PUBLIC_BACKEND_URL || 'http://localhost:3002';

export interface NutritionAnalysis {
	foodName: string;
	calories: number;
	protein: number;
	carbohydrates: number;
	fat: number;
	fiber: number;
	sugar: number;
	sodium: number;
	servingSize: string;
	confidence: number;
	ingredients?: string[];
	healthTips?: string[];
}

export interface Meal {
	id: string;
	user_id: string;
	food_name: string;
	image_url?: string;
	calories: number;
	protein: number;
	carbohydrates: number;
	fat: number;
	fiber: number;
	sugar: number;
	sodium: number;
	serving_size: string;
	meal_type?: string;
	notes?: string;
	created_at: string;
	updated_at: string;
}

export interface DailySummary {
	date: string;
	totalCalories: number;
	totalProtein: number;
	totalCarbohydrates: number;
	totalFat: number;
	totalFiber: number;
	totalSugar: number;
	totalSodium: number;
	mealCount: number;
}

class ApiService {
	private async request<T>(endpoint: string, options?: RequestInit): Promise<T> {
		const response = await fetch(`${API_BASE}/api${endpoint}`, {
			...options,
			headers: {
				'Content-Type': 'application/json',
				...options?.headers,
			},
		});

		if (!response.ok) {
			throw new Error(`API error: ${response.status}`);
		}

		return response.json();
	}

	async analyzeImage(imageBase64: string): Promise<NutritionAnalysis> {
		return this.request('/meals/analyze/image', {
			method: 'POST',
			body: JSON.stringify({ imageBase64 }),
		});
	}

	async analyzeText(description: string): Promise<NutritionAnalysis> {
		return this.request('/meals/analyze/text', {
			method: 'POST',
			body: JSON.stringify({ description }),
		});
	}

	async getMeals(userId: string, date?: string): Promise<Meal[]> {
		const params = date ? `?date=${date}` : '';
		return this.request(`/meals/user/${userId}${params}`);
	}

	async getDailySummary(userId: string, date: string): Promise<DailySummary> {
		return this.request(`/meals/user/${userId}/summary?date=${date}`);
	}

	async createMeal(meal: Partial<Meal> & { userId: string }): Promise<Meal> {
		return this.request('/meals', {
			method: 'POST',
			body: JSON.stringify(meal),
		});
	}

	async updateMeal(id: string, updates: Partial<Meal>): Promise<Meal> {
		return this.request(`/meals/${id}`, {
			method: 'PUT',
			body: JSON.stringify(updates),
		});
	}

	async deleteMeal(id: string): Promise<void> {
		await this.request(`/meals/${id}`, {
			method: 'DELETE',
		});
	}

	async healthCheck(): Promise<{ status: string; timestamp: string; service: string }> {
		return this.request('/health');
	}
}

export const api = new ApiService();