#include "servers.hpp"
#include "server_env.hpp"
#include "service_runner.hpp"
#include "tableprint.hpp"
#include "interactive/interactive.hpp"
#include "utils/envmanager.hpp"
#include "utils/directories.hpp"
#include "services.hpp"
#include <iostream>
#include <fstream>
#include <iomanip>
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>

namespace fs = boost::filesystem;

namespace dropshell {

std::vector<ServerInfo> get_configured_servers() {
    std::vector<ServerInfo> servers;

    std::string servers_dir = get_local_config_servers_path();
    if (servers_dir.empty()) {
        return servers;
    }

    if (!fs::exists(servers_dir)) {
        std::cerr << "Error: Servers directory not found:" << servers_dir << std::endl;
        return servers;
    }

    for (const auto& entry : fs::directory_iterator(servers_dir)) {
        if (fs::is_directory(entry)) {
            std::string server_name = entry.path().filename().string();

            server_env env(server_name);
            if (!env.is_valid()) {
                std::cerr << "Error: Invalid server environment file: " << server_name << std::endl;
                continue;
            }
            servers.push_back({
                server_name,
                env.get_SSH_HOST(),
                env.get_SSH_USER(),
                env.get_SSH_PORT()
            });
        }
    }

    return servers;
}



void list_servers() {
    auto servers = get_configured_servers();

    tableprint tp("All DropShell Servers");
    tp.add_row({"Name", "Address", "Health", "Ports"});
    for (const auto& server : servers) {
        std::vector<int> ports_used;
        std::string serviceticks = "";
        std::vector<ServiceInfo> services = get_server_services_info(server.name);
        for (const auto& service : services) {
            service_runner ss;
            if (ss.init(server.name, service.service_name)) 
                serviceticks += ss.healthmark() + " ";
            else std::cout<<"Error: Failed to initialise service runner for server: ["<<server.name<<"] and service: ["<<service.service_name<<"]"<<std::endl;
            std::vector<int> ports = ss.get_ports();
            ports_used.insert(ports_used.end(), ports.begin(), ports.end());
        }
        // convert ports_used to string
        std::string ports_used_str = "";
        bool first = true;
        for (const auto& port : ports_used) {
            if (!first) {
                ports_used_str += ", ";
            }
            ports_used_str += std::to_string(port);
            first = false;
        }
        tp.add_row({server.name, server.ssh_host, serviceticks, ports_used_str});
    }
    tp.print();
}

void show_server_details(const std::string& server_name) {
    server_env env(server_name);
    if (!env.is_valid()) {
        std::cerr << "Error: Invalid server environment file: " << server_name << std::endl;
        return;
    }

    //---------------------
    // Check if server is reachable via SSH
    std::string ssh_address = env.get_SSH_HOST();
    std::string ssh_user = env.get_SSH_USER();
    std::string ssh_port = env.get_SSH_PORT();
    if (!ssh_address.empty()) {
        std::cout << std::endl << "Server Status:" << std::endl;
        std::cout << std::string(40, '-') << std::endl;
        
        // Try to connect to the server
        std::string cmd = "ssh -o ConnectTimeout=5 " + ssh_user + "@" + ssh_address + " -p " + ssh_port + " 'echo connected' 2>/dev/null";
        int result = system(cmd.c_str());
        if (result == 0) {
            std::cout << "Status: Online" << std::endl;
            
            // // Get uptime if possible
            // cmd = "ssh " + ssh_address + " 'uptime' 2>/dev/null";
            // int rval = system(cmd.c_str());
            // if (rval != 0) {
            //     std::cout << "Error: Failed to get uptime" << std::endl;
            // } 
        } else {
            std::cout << "Status: Offline" << std::endl;
        }
    }
    std::cout << std::endl;

    //---------------------
    {
        std::cout << std::endl;
        tableprint tp("Server Configuration: " + server_name, true);
        tp.add_row({"Key", "Value"});
        for (const auto& [key, value] : env.get_variables()) {
            tp.add_row({key, value});
        }
        tp.print();
    }

    //---------------------
    // list services, and run healthcheck on each
    {
        tableprint tp("Services: " + server_name, false);
        tp.add_row({"Status", "Service", "Ports"});
        
        std::vector<ServiceInfo> services = get_server_services_info(server_name);
        for (const auto& service : services) {
            std::string healthy = "?";
            std::vector<int> ports;
            service_runner ss;
            if (ss.init(server_name, service.service_name)) 
            {
                healthy = ss.healthmark();
                ports = ss.get_ports();
            }
            bool first = true;
            std::string ports_str = "";
            for (const auto& port : ports) {
                if (!first) {
                    ports_str += ", ";
                }
                ports_str += std::to_string(port);
                first = false;
            }
            tp.add_row({healthy, service.service_name, ports_str});
        } // end of for (const auto& service : services)
        tp.print();
    } // end of list services
} // end of show_server_details





void interactive_mode() {
    interactive::fullscreen_window iw("DropShell Servers");

    iw.set_input_text_display("Loading all servers' status...");

    auto servers = get_configured_servers();
    std::vector<std::string> server_names;
    for (const auto& server : servers) {
        server_names.push_back(server.name);
    }
    
    list_servers();

    while (true) {
        std::string server_name = iw.set_input_multiple_choice("Select a server", server_names);
        if (server_name.empty()) 
        {
            iw.close();
            return;
        }
        
        while (!server_name.empty()) {
            iw.clear_display();
            show_server_details(server_name);
            server_name = iw.set_input_multiple_choice("Select a server", server_names, server_name);
        }
        iw.clear_display();
        list_servers();
    }
}

} // namespace dropshell