package net.knarcraft.minecraftserverlauncher.userinterface;

import net.knarcraft.minecraftserverlauncher.profile.Collection;
import net.knarcraft.minecraftserverlauncher.profile.ServerLauncherController;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

/**
 * This class takes care of all server controls on the server control tab
 */
public class ServerControlTab implements ActionListener {

    private JComboBox<String> targetServerCombo;
    private JComboBox<String> targetPlayerCombo;
    private JButton kickButton;
    private JButton banButton;
    private JButton opButton;
    private JButton deopButton;
    private JButton customCommandButton;
    private JButton saveServerButton;
    private JButton reloadButton;
    private JButton showConsolesButton;
    private JTextField customCommandTextField;

    private final ServerLauncherController controller = ServerLauncherController.getInstance();
    private final ArrayList<String> globalPlayers;

    /**
     * Instantiates a new server control tab
     *
     * @param mainFrame      <p>The main frame of the GUI</p>
     * @param controlServers <p>The JPanel to attach the server controls to</p>
     */
    public ServerControlTab(JFrame mainFrame, JPanel controlServers) {
        this.globalPlayers = new ArrayList<>();
        initialize(mainFrame, controlServers);
    }

    /**
     * Initializes GUI elements for the server control tab
     *
     * @param mainFrame      <p>The main frame of the GUI</p>
     * @param controlServers <p>The JPanel to attach the server controls to</p>
     */
    private void initialize(JFrame mainFrame, JPanel controlServers) {
        SpringLayout springLayout = new SpringLayout();
        controlServers.setLayout(springLayout);
        targetServerCombo = new JComboBox<>();
        springLayout.putConstraint(SpringLayout.NORTH, targetServerCombo, 10, SpringLayout.NORTH, controlServers);
        controlServers.add(targetServerCombo);
        targetServerCombo.addActionListener(this);

        targetPlayerCombo = new JComboBox<>();
        springLayout.putConstraint(SpringLayout.NORTH, targetPlayerCombo, 6, SpringLayout.SOUTH, targetServerCombo);
        targetPlayerCombo.setEditable(true);
        controlServers.add(targetPlayerCombo);

        kickButton = new JButton("Kick");
        springLayout.putConstraint(SpringLayout.NORTH, kickButton, 10, SpringLayout.NORTH, controlServers);
        springLayout.putConstraint(SpringLayout.WEST, kickButton, 6, SpringLayout.EAST, targetServerCombo);
        springLayout.putConstraint(SpringLayout.EAST, kickButton, 104, SpringLayout.WEST, kickButton);
        springLayout.putConstraint(SpringLayout.SOUTH, targetServerCombo, 0, SpringLayout.SOUTH, kickButton);
        controlServers.add(kickButton);
        kickButton.addActionListener(this);

        banButton = new JButton("Ban");
        springLayout.putConstraint(SpringLayout.NORTH, banButton, 6, SpringLayout.SOUTH, kickButton);
        springLayout.putConstraint(SpringLayout.WEST, banButton, 6, SpringLayout.EAST, targetPlayerCombo);
        springLayout.putConstraint(SpringLayout.EAST, banButton, 104, SpringLayout.WEST, banButton);
        springLayout.putConstraint(SpringLayout.SOUTH, targetPlayerCombo, 0, SpringLayout.SOUTH, banButton);
        controlServers.add(banButton);
        banButton.addActionListener(this);

        opButton = new JButton("OP");
        springLayout.putConstraint(SpringLayout.NORTH, opButton, 10, SpringLayout.NORTH, controlServers);
        springLayout.putConstraint(SpringLayout.WEST, opButton, 6, SpringLayout.EAST, kickButton);
        springLayout.putConstraint(SpringLayout.EAST, opButton, -10, SpringLayout.EAST, controlServers);
        controlServers.add(opButton);
        opButton.addActionListener(this);

        deopButton = new JButton("DEOP");
        springLayout.putConstraint(SpringLayout.WEST, deopButton, 6, SpringLayout.EAST, banButton);
        springLayout.putConstraint(SpringLayout.NORTH, deopButton, 5, SpringLayout.SOUTH, opButton);
        springLayout.putConstraint(SpringLayout.EAST, deopButton, -10, SpringLayout.EAST, controlServers);
        controlServers.add(deopButton);
        deopButton.addActionListener(this);

        JLabel lblTargetServer = new JLabel("Target server");
        springLayout.putConstraint(SpringLayout.WEST, targetServerCombo, 6, SpringLayout.EAST, lblTargetServer);
        springLayout.putConstraint(SpringLayout.EAST, targetServerCombo, 121, SpringLayout.EAST, lblTargetServer);
        springLayout.putConstraint(SpringLayout.NORTH, lblTargetServer, 10, SpringLayout.NORTH, controlServers);
        springLayout.putConstraint(SpringLayout.SOUTH, lblTargetServer, 0, SpringLayout.SOUTH, targetServerCombo);
        springLayout.putConstraint(SpringLayout.WEST, lblTargetServer, 10, SpringLayout.WEST, controlServers);
        controlServers.add(lblTargetServer);

        JLabel lblTargetPlayer = new JLabel("Target player");
        springLayout.putConstraint(SpringLayout.WEST, targetPlayerCombo, 7, SpringLayout.EAST, lblTargetPlayer);
        springLayout.putConstraint(SpringLayout.EAST, targetPlayerCombo, 122, SpringLayout.EAST, lblTargetPlayer);
        springLayout.putConstraint(SpringLayout.NORTH, lblTargetPlayer, 6, SpringLayout.SOUTH, lblTargetServer);
        springLayout.putConstraint(SpringLayout.SOUTH, lblTargetPlayer, 0, SpringLayout.SOUTH, targetPlayerCombo);
        springLayout.putConstraint(SpringLayout.WEST, lblTargetPlayer, 0, SpringLayout.WEST, lblTargetServer);
        controlServers.add(lblTargetPlayer);

        customCommandButton = new JButton("Custom command");
        springLayout.putConstraint(SpringLayout.WEST, customCommandButton, 250, SpringLayout.WEST, controlServers);
        springLayout.putConstraint(SpringLayout.EAST, customCommandButton, 0, SpringLayout.EAST, opButton);
        controlServers.add(customCommandButton);
        customCommandButton.addActionListener(this);
        mainFrame.getRootPane().setDefaultButton(customCommandButton);

        customCommandTextField = new JTextField();
        springLayout.putConstraint(SpringLayout.WEST, customCommandTextField, 10, SpringLayout.WEST, controlServers);
        springLayout.putConstraint(SpringLayout.EAST, customCommandTextField, -6, SpringLayout.WEST, customCommandButton);
        springLayout.putConstraint(SpringLayout.NORTH, customCommandButton, 0, SpringLayout.NORTH, customCommandTextField);
        springLayout.putConstraint(SpringLayout.SOUTH, customCommandTextField, 0, SpringLayout.SOUTH, customCommandButton);
        controlServers.add(customCommandTextField);
        customCommandTextField.setColumns(10);

        saveServerButton = new JButton("Save server");
        springLayout.putConstraint(SpringLayout.NORTH, customCommandTextField, 6, SpringLayout.SOUTH, saveServerButton);
        springLayout.putConstraint(SpringLayout.NORTH, saveServerButton, 6, SpringLayout.SOUTH, banButton);
        springLayout.putConstraint(SpringLayout.WEST, saveServerButton, 0, SpringLayout.WEST, kickButton);
        springLayout.putConstraint(SpringLayout.EAST, saveServerButton, 104, SpringLayout.WEST, kickButton);
        springLayout.putConstraint(SpringLayout.EAST, saveServerButton, 104, SpringLayout.WEST, kickButton);
        controlServers.add(saveServerButton);
        saveServerButton.addActionListener(this);

        reloadButton = new JButton("Reload");
        springLayout.putConstraint(SpringLayout.NORTH, reloadButton, 6, SpringLayout.SOUTH, deopButton);
        springLayout.putConstraint(SpringLayout.WEST, reloadButton, 0, SpringLayout.WEST, deopButton);
        springLayout.putConstraint(SpringLayout.EAST, reloadButton, 0, SpringLayout.EAST, opButton);
        controlServers.add(reloadButton);
        reloadButton.addActionListener(this);

        showConsolesButton = new JButton("View server consoles");
        springLayout.putConstraint(SpringLayout.NORTH, showConsolesButton, 0, SpringLayout.NORTH, saveServerButton);
        springLayout.putConstraint(SpringLayout.WEST, showConsolesButton, 0, SpringLayout.WEST, lblTargetServer);
        springLayout.putConstraint(SpringLayout.EAST, showConsolesButton, 0, SpringLayout.EAST, targetServerCombo);
        controlServers.add(showConsolesButton);
        showConsolesButton.addActionListener(this);
    }

    /**
     * Updates available servers according to existing collections
     */
    public void update() {
        this.targetServerCombo.removeAllItems();
        this.targetServerCombo.addItem("All");
        for (Collection collection : ServerLauncherController.getInstance().getCurrentProfile().getCollections()) {
            this.targetServerCombo.addItem(collection.getName());
        }
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        //Registers actions on the server control tab
        handleServerControlTabButtons(actionEvent.getSource());
    }

    /**
     * Handles buttons and combos on the server control tab
     *
     * @param actionSource <p>The object being interacted with</p>
     */
    private void handleServerControlTabButtons(Object actionSource) {
        String selectedServerValue = null;
        String selectedPlayerValue = null;
        Object selectedServer = targetServerCombo.getSelectedItem();
        if (selectedServer != null) {
            selectedServerValue = selectedServer.toString();
        }
        Object selectedPlayer = targetPlayerCombo.getSelectedItem();
        if (selectedPlayer != null) {
            selectedPlayerValue = selectedPlayer.toString();
        }
        //Register actions on all commands executed on a specific player
        handlePlayerCommands(actionSource, selectedServerValue, selectedPlayerValue);
        //Registers actions on all commands executed on a specific server
        handleServerCommands(actionSource, selectedServerValue);

        if (actionSource == showConsolesButton) {
            ServerConsoles.setAsVisible();
        } else if (actionSource == targetServerCombo) {
            updatePlayers();
        }
    }

    /**
     * Updates the list of players currently online on the selected server
     */
    private void updatePlayers() {
        String selectedServerValue;
        Object selectedServer = targetServerCombo.getSelectedItem();
        if (selectedServer != null) {
            targetPlayerCombo.removeAllItems();
            selectedServerValue = selectedServer.toString();
            if (selectedServerValue.equals("All")) {
                for (String player : this.globalPlayers) {
                    targetPlayerCombo.addItem(player);
                }
            } else {
                for (String player : controller.getCurrentProfile().getCollection(selectedServerValue).getServer().getPlayers()) {
                    targetPlayerCombo.addItem(player);
                }
            }
        }
    }

    /**
     * Adds a player to the global player list, and updates the players combo
     *
     * @param name <p>The name of the player to add</p>
     */
    public void addPlayer(String name) {
        this.globalPlayers.add(name);
        this.updatePlayers();
    }

    /**
     * Removes a player from the global list of players
     *
     * @param name <p>The name of the player to remove</p>
     */
    public void removePlayer(String name) {
        globalPlayers.removeIf(playerName -> playerName.equals(name));
        this.updatePlayers();
    }

    /**
     * Handles command buttons acting on a specific server
     *
     * @param actionSource        <p>The object being interacted with</p>
     * @param selectedServerValue <p>The server currently selected</p>
     */
    private void handleServerCommands(Object actionSource, String selectedServerValue) {
        if (selectedServerValue == null) {
            return;
        }
        if (actionSource == customCommandButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, customCommandTextField.getText());
            customCommandTextField.setText("");
        } else if (actionSource == saveServerButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "save-all");
        } else if (actionSource == reloadButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "reload");
        }
    }

    /**
     * Handles command buttons which act on a player
     *
     * @param actionSource        <p>The clicked object</p>
     * @param selectedServerValue <p>The server currently selected</p>
     * @param selectedPlayerValue <p>The player currently selected</p>
     */
    private void handlePlayerCommands(Object actionSource, String selectedServerValue, String selectedPlayerValue) {
        if (selectedServerValue == null || selectedPlayerValue == null) {
            return;
        }
        if (actionSource == kickButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "kick " + selectedPlayerValue);
        } else if (actionSource == banButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "ban " + selectedPlayerValue);
        } else if (actionSource == opButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "op " + selectedPlayerValue);
        } else if (actionSource == deopButton) {
            controller.getCurrentProfile().sendCommand(selectedServerValue, "deop " + selectedPlayerValue);
        }
    }
}