import { BodyWeightRecord } from '../types';

const API_URL = '/api';

export const getWeightHistory = async (): Promise<BodyWeightRecord[]> => {
    const token = localStorage.getItem('token');
    if (!token) return [];

    try {
        const response = await fetch(`${API_URL}/weight`, {
            headers: {
                'Authorization': `Bearer ${token}`
            }
        });

        if (!response.ok) {
            throw new Error('Failed to fetch weight history');
        }

        return await response.json();
    } catch (error) {
        console.error('Error fetching weight history:', error);
        return [];
    }
};

export const logWeight = async (weight: number, dateStr?: string): Promise<BodyWeightRecord | null> => {
    const token = localStorage.getItem('token');
    if (!token) return null;

    try {
        // Default to today if no date provided
        const date = dateStr || new Date().toISOString().split('T')[0];

        const response = await fetch(`${API_URL}/weight`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Authorization': `Bearer ${token}`
            },
            body: JSON.stringify({ weight, dateStr: date })
        });

        if (!response.ok) {
            throw new Error('Failed to log weight');
        }

        return await response.json();
    } catch (error) {
        console.error('Error logging weight:', error);
        return null;
    }
};