// API Client for communicating with the backend

class ApiClient {
    constructor() {
        // Auto-detect server URL based on current location
        const currentHost = window.location.hostname;
        const currentPort = window.location.port;
        
        // If accessing from localhost, use localhost:3001
        // If accessing from another device, use the same hostname but port 3001
        if (currentHost === 'localhost' || currentHost === '127.0.0.1') {
            this.baseUrl = 'http://localhost:3001';
        } else {
            // Use the same hostname but port 3001
            this.baseUrl = `http://${currentHost}:3001`;
        }
        
        console.log('API Client initialized with base URL:', this.baseUrl);
    }

    async request(path, { method = 'GET', headers = {}, body = undefined, query = undefined, isForm = false } = {}) {
        const url = new URL(`${this.baseUrl}${path}`);
        if (query && typeof query === 'object') {
            Object.entries(query).forEach(([k, v]) => {
                if (v !== undefined && v !== null) url.searchParams.set(k, String(v));
            });
        }
        const finalHeaders = { 'Accept': 'application/json', ...headers };
        const options = { method, headers: finalHeaders };
        if (body !== undefined) {
            if (isForm) {
                options.body = body;
            } else {
                options.headers['Content-Type'] = options.headers['Content-Type'] || 'application/json';
                options.body = typeof body === 'string' ? body : JSON.stringify(body);
            }
        }
        const response = await fetch(url.toString(), options);
        let data;
        const text = await response.text();
        try {
            data = text ? JSON.parse(text) : null;
        } catch (_) {
            data = text; // Non-JSON payload
        }
        if (!response.ok) {
            const message = (data && data.message) || `HTTP ${response.status}: ${response.statusText}`;
            throw new Error(message);
        }
        return data;
    }

    async getClusterMembers() {
        return this.request('/api/cluster/members', { method: 'GET' });
    }

    async getClusterMembersFromNode(ip) {
        return this.request(`/api/cluster/members`, { 
            method: 'GET',
            query: { ip: ip }
        });
    }

    async getDiscoveryInfo() {
        return this.request('/api/discovery/nodes', { method: 'GET' });
    }

    async selectRandomPrimaryNode() {
        return this.request('/api/discovery/random-primary', {
            method: 'POST',
            body: { timestamp: new Date().toISOString() }
        });
    }

    async getNodeStatus(ip) {
        return this.request(`/api/node/status/${encodeURIComponent(ip)}`, { method: 'GET' });
    }

    async getTasksStatus(ip) {
        return this.request('/api/tasks/status', { method: 'GET', query: ip ? { ip } : undefined });
    }

    async getCapabilities(ip) {
        return this.request('/api/capabilities', { method: 'GET', query: ip ? { ip } : undefined });
    }

    async callCapability({ ip, method, uri, params }) {
        return this.request('/api/proxy-call', {
            method: 'POST',
            body: { ip, method, uri, params }
        });
    }

    async uploadFirmware(file, nodeIp) {
        const formData = new FormData();
        formData.append('file', file);
        return this.request(`/api/node/update`, {
            method: 'POST',
            query: { ip: nodeIp },
            body: formData,
            isForm: true,
            headers: {},
        });
    }
}

// Global API client instance
window.apiClient = new ApiClient();