// API Client for Training Tracker

const API_BASE_URL = 'http://localhost:8080/api';

class ApiClient {
    constructor(baseUrl = API_BASE_URL) {
        this.baseUrl = baseUrl;
    }

    async request(endpoint, options = {}) {
        const url = `${this.baseUrl}${endpoint}`;
        const config = {
            headers: {
                'Content-Type': 'application/json',
                ...options.headers,
            },
            ...options,
        };

        if (config.body && typeof config.body === 'object') {
            config.body = JSON.stringify(config.body);
        }

        try {
            const response = await fetch(url, config);

            if (response.status === 204) {
                return null;
            }

            const data = await response.json();

            if (!response.ok) {
                throw new Error(data.error || 'API request failed');
            }

            return data;
        } catch (error) {
            console.error('API Error:', error);
            throw error;
        }
    }

    // Exercises
    async getExercises() {
        return this.request('/exercises');
    }

    async getExercise(id) {
        return this.request(`/exercises/${id}`);
    }

    async createExercise(data) {
        return this.request('/exercises', {
            method: 'POST',
            body: data,
        });
    }

    async updateExercise(id, data) {
        return this.request(`/exercises/${id}`, {
            method: 'PUT',
            body: data,
        });
    }

    async deleteExercise(id) {
        return this.request(`/exercises/${id}`, {
            method: 'DELETE',
        });
    }

    // Training Plans
    async getPlans() {
        return this.request('/plans');
    }

    async getPlan(id) {
        return this.request(`/plans/${id}`);
    }

    async createPlan(data) {
        return this.request('/plans', {
            method: 'POST',
            body: data,
        });
    }

    async updatePlan(id, data) {
        return this.request(`/plans/${id}`, {
            method: 'PUT',
            body: data,
        });
    }

    async deletePlan(id) {
        return this.request(`/plans/${id}`, {
            method: 'DELETE',
        });
    }

    // Sessions
    async getSessions() {
        return this.request('/sessions');
    }

    async getSession(id) {
        return this.request(`/sessions/${id}`);
    }

    async createSession(data) {
        return this.request('/sessions', {
            method: 'POST',
            body: data,
        });
    }

    async updateSession(id, data) {
        return this.request(`/sessions/${id}`, {
            method: 'PUT',
            body: data,
        });
    }

    async deleteSession(id) {
        return this.request(`/sessions/${id}`, {
            method: 'DELETE',
        });
    }

    async addSessionEntry(sessionId, data) {
        return this.request(`/sessions/${sessionId}/entries`, {
            method: 'POST',
            body: data,
        });
    }
}

const api = new ApiClient();