// API Client for communicating with the backend

class ApiClient {
    constructor() {
        this.baseUrl = 'http://localhost:3001'; // Backend server URL
    }

    async getClusterMembers() {
        try {
            const response = await fetch(`${this.baseUrl}/api/cluster/members`, {
                method: 'GET',
                headers: {
                    'Accept': 'application/json'
                }
            });

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

            return await response.json();
        } catch (error) {
            throw new Error(`Request failed: ${error.message}`);
        }
    }

    async getDiscoveryInfo() {
        try {
            const response = await fetch(`${this.baseUrl}/api/discovery/nodes`, {
                method: 'GET',
                headers: {
                    'Accept': 'application/json'
                }
            });

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

            return await response.json();
        } catch (error) {
            throw new Error(`Request failed: ${error.message}`);
        }
    }

    async selectRandomPrimaryNode() {
        try {
            const response = await fetch(`${this.baseUrl}/api/discovery/random-primary`, {
                method: 'POST',
                headers: {
                    'Accept': 'application/json',
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({
                    timestamp: new Date().toISOString()
                })
            });

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

            return await response.json();
        } catch (error) {
            throw new Error(`Request failed: ${error.message}`);
        }
    }

    async getNodeStatus(ip) {
        try {
            const response = await fetch(`${this.baseUrl}/api/node/status/${encodeURIComponent(ip)}`, {
                method: 'GET',
                headers: {
                    'Accept': 'application/json'
                }
            });

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

            return await response.json();
        } catch (error) {
            throw new Error(`Request failed: ${error.message}`);
        }
    }

    async getTasksStatus(ip) {
        try {
            const url = ip
                ? `${this.baseUrl}/api/tasks/status?ip=${encodeURIComponent(ip)}`
                : `${this.baseUrl}/api/tasks/status`;
            const response = await fetch(url, {
                method: 'GET',
                headers: {
                    'Accept': 'application/json'
                }
            });

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

            return await response.json();
        } catch (error) {
            throw new Error(`Request failed: ${error.message}`);
        }
    }

    async uploadFirmware(file, nodeIp) {
        try {
            const formData = new FormData();
            formData.append('file', file);
            
            const response = await fetch(`${this.baseUrl}/api/node/update?ip=${encodeURIComponent(nodeIp)}`, {
                method: 'POST',
                body: formData
            });
            
            if (!response.ok) {
                const errorData = await response.json();
                throw new Error(errorData.message || `HTTP ${response.status}: ${response.statusText}`);
            }
            
            return await response.json();
        } catch (error) {
            throw new Error(`Upload failed: ${error.message}`);
        }
    }
}

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