/**
 * Moxiegen API Client
 * Handles all API calls to the backend with authentication
 */

class MoxieAPI {
    constructor() {
        this.baseUrl = CONFIG.api.baseUrl;
    }

    /**
     * Make authenticated API request
     */
    async request(endpoint, options = {}) {
        const token = await moxieAuth.getToken();

        const headers = {
            'Content-Type': 'application/json',
            ...options.headers
        };

        if (token) {
            headers['Authorization'] = `Bearer ${token}`;
        }

        const url = endpoint.startsWith('http') ? endpoint : this.baseUrl + endpoint;

        try {
            const response = await fetch(url, {
                ...options,
                headers
            });

            const data = await response.json();

            if (!response.ok) {
                throw new APIError(data.message || 'Request failed', response.status, data);
            }

            return data;

        } catch (error) {
            if (error instanceof APIError) {
                throw error;
            }
            throw new APIError(error.message, 0, { error: error.message });
        }
    }

    /**
     * GET request
     */
    async get(endpoint) {
        return this.request(endpoint, { method: 'GET' });
    }

    /**
     * POST request
     */
    async post(endpoint, data) {
        return this.request(endpoint, {
            method: 'POST',
            body: JSON.stringify(data)
        });
    }

    /**
     * PUT request
     */
    async put(endpoint, data) {
        return this.request(endpoint, {
            method: 'PUT',
            body: JSON.stringify(data)
        });
    }

    /**
     * DELETE request
     */
    async delete(endpoint, data) {
        return this.request(endpoint, {
            method: 'DELETE',
            body: data ? JSON.stringify(data) : undefined
        });
    }

    // ============================================
    // User Endpoints
    // ============================================

    /**
     * Get current user profile
     */
    async getProfile() {
        return this.get(CONFIG.api.endpoints.me);
    }

    /**
     * Update user profile
     */
    async updateProfile(data) {
        return this.put(CONFIG.api.endpoints.me, data);
    }

    /**
     * Deactivate account
     */
    async deactivateAccount() {
        return this.delete(CONFIG.api.endpoints.me);
    }

    // ============================================
    // Credits Endpoints
    // ============================================

    /**
     * Get credits balance and history
     */
    async getCredits(page = 1, limit = 10) {
        return this.get(`${CONFIG.api.endpoints.credits}?page=${page}&limit=${limit}`);
    }

    // ============================================
    // API Keys Endpoints
    // ============================================

    /**
     * Get all API keys
     */
    async getApiKeys() {
        return this.get(CONFIG.api.endpoints.apiKeys);
    }

    /**
     * Create new API key
     */
    async createApiKey(name = 'API Key') {
        return this.post(CONFIG.api.endpoints.apiKeys, { name });
    }

    /**
     * Revoke API key
     */
    async revokeApiKey(keyId) {
        return this.delete(`${CONFIG.api.endpoints.apiKeys}/${keyId}`);
    }

    // ============================================
    // Health Check
    // ============================================

    /**
     * Check API health
     */
    async checkHealth() {
        return this.get(CONFIG.api.endpoints.health);
    }
}

/**
 * Custom API Error class
 */
class APIError extends Error {
    constructor(message, status, data) {
        super(message);
        this.name = 'APIError';
        this.status = status;
        this.data = data;
    }
}

// Create singleton instance
const moxieAPI = new MoxieAPI();

// Export for use in other modules
window.moxieAPI = moxieAPI;
window.APIError = APIError;