package com.it_jaros.jscanner;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.util.List;

public class Scan {
    private final List<String> hosts;
    private final ScanState state;
    private final String ports;
    private final Counter counter;
    private final ProgressBar progressBar;

    private Scan(List<String> hosts, String ports, ScanState state, boolean quiet) {
        this.hosts = hosts;
        this.ports = ports;
        this.state = state;
        this.counter = new Counter();
        this.progressBar = new ProgressBar(quiet);
    }

    public List<ScanResult> getResults() {
        return this.state.getCopyOfResults();
    }

    public int getPeakConcurrentConnects() {
        return counter.max();
    }

    public static Scan create(ScanOptions options) {
        if (options.hostsFile() != null) {
            return create(options.hostsFile(), options.ports(), options.quiet());
        }
        return create(options.hostsArgv(), options.ports(), options.quiet());
    }

    public static Scan create(String sourceFile, String ports, boolean quiet) {
        try (BufferedReader reader = Files.newBufferedReader(Path.of(sourceFile))) {
            return create(reader.lines().toList(), ports, quiet);
        } catch (FileNotFoundException | NoSuchFileException e) {
            System.out.printf("Could not open file %s%n", sourceFile);
        } catch (IOException e) {
            System.out.printf("Error while trying to read hosts: %s -> %s %n", e.getClass().getSimpleName(), e.getMessage());
        }

        return null;
    }

    public static Scan create(List<String> hostsArgv, String ports, boolean quiet) {
        return new Scan(hostsArgv, ports, new ScanState(), quiet);
    }

    public List<String> getHosts() {
        return hosts;
    }

    public String getPorts() {
        return ports;
    }

    public void start() {
        progressBar.start();
    }

    public void stop() {
        progressBar.stop();
    }

    public void addHostProgress(Progress progress) {
        progressBar.add(progress);
    }

    public void incSocketCounter() {
        counter.inc();
    }

    public void decSocketCounter() {
        counter.dec();
    }

    public void addScanResult(ScanResult scanResult) {
        state.addScanResult(scanResult);
    }
}