package ctbrec.ui;

import static ctbrec.Settings.DirectoryStructure.*;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import ctbrec.Config;
import ctbrec.Hmac;
import ctbrec.Settings;
import ctbrec.Settings.DirectoryStructure;
import ctbrec.sites.ConfigUI;
import ctbrec.sites.Site;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.geometry.HPos;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.control.Accordion;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.ScrollPane;
import javafx.scene.control.Tab;
import javafx.scene.control.TextField;
import javafx.scene.control.TextInputDialog;
import javafx.scene.control.TitledPane;
import javafx.scene.control.ToggleGroup;
import javafx.scene.control.Tooltip;
import javafx.scene.layout.Border;
import javafx.scene.layout.BorderStroke;
import javafx.scene.layout.BorderStrokeStyle;
import javafx.scene.layout.BorderWidths;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.stage.DirectoryChooser;
import javafx.stage.FileChooser;;

public class SettingsTab extends Tab implements TabSelectionListener {

    private static final transient Logger LOG = LoggerFactory.getLogger(SettingsTab.class);

    public static final int CHECKBOX_MARGIN = 6;
    private TextField recordingsDirectory;
    private Button recordingsDirectoryButton;
    private Button postProcessingDirectoryButton;
    private TextField mediaPlayer;
    private TextField postProcessing;
    private TextField server;
    private TextField port;
    private CheckBox loadResolution;
    private CheckBox secureCommunication = new CheckBox();
    private CheckBox chooseStreamQuality = new CheckBox();
    private CheckBox multiplePlayers = new CheckBox();
    private RadioButton recordLocal;
    private RadioButton recordRemote;
    private ToggleGroup recordLocation;
    private ProxySettingsPane proxySettingsPane;
    private ComboBox<Integer> maxResolution;
    private ComboBox<SplitAfterOption> splitAfter;
    private ComboBox<DirectoryStructure> directoryStructure;
    private List<Site> sites;
    private Label restartLabel;
    private Accordion credentialsAccordion = new Accordion();

    public SettingsTab(List<Site> sites) {
        this.sites = sites;
        setText("Settings");
        createGui();
        setClosable(false);
        setRecordingMode(recordLocal.isSelected());
    }

    private void createGui() {
        // set up main layout, 2 columns with VBoxes 50/50
        GridPane mainLayout = createGridLayout();
        mainLayout.setHgap(15);
        mainLayout.setVgap(15);
        mainLayout.setPadding(new Insets(15));
        ColumnConstraints cc = new ColumnConstraints();
        cc.setPercentWidth(50);
        mainLayout.getColumnConstraints().setAll(cc, cc);
        setContent(new ScrollPane(mainLayout));
        VBox leftSide = new VBox(15);
        VBox rightSide = new VBox(15);
        GridPane.setHgrow(leftSide, Priority.ALWAYS);
        GridPane.setHgrow(rightSide, Priority.ALWAYS);
        GridPane.setFillWidth(leftSide, true);
        GridPane.setFillWidth(rightSide, true);
        mainLayout.add(leftSide, 0, 1);
        mainLayout.add(rightSide, 1, 1);

        // restart info label
        restartLabel = new Label("A restart is required to apply changes you made!");
        restartLabel.setVisible(false);
        restartLabel.setFont(Font.font(24));
        restartLabel.setTextFill(Color.RED);
        mainLayout.add(restartLabel, 0, 0);
        GridPane.setColumnSpan(restartLabel, 2);
        GridPane.setHalignment(restartLabel, HPos.CENTER);

        // left side
        leftSide.getChildren().add(createGeneralPanel());
        leftSide.getChildren().add(createLocationsPanel());
        leftSide.getChildren().add(createRecordLocationPanel());
        proxySettingsPane = new ProxySettingsPane(this);
        leftSide.getChildren().add(proxySettingsPane);

        //right side
        rightSide.getChildren().add(createSiteSelectionPanel());
        rightSide.getChildren().add(credentialsAccordion);
        for (int i = 0; i < sites.size(); i++) {
            Site site = sites.get(i);
            ConfigUI siteConfig = SiteUiFactory.getUi(site).getConfigUI();
            if(siteConfig != null) {
                TitledPane pane = new TitledPane(site.getName(), siteConfig.createConfigPanel());
                credentialsAccordion.getPanes().add(pane);
            }
        }
        credentialsAccordion.setExpandedPane(credentialsAccordion.getPanes().get(0));
    }

    private Node createSiteSelectionPanel() {
        Settings settings = Config.getInstance().getSettings();
        GridPane layout = createGridLayout();

        int row = 0;
        for (Site site : sites) {
            Label l = new Label(site.getName());
            layout.add(l, 0, row);
            CheckBox enabled = new CheckBox();
            enabled.setSelected(!settings.disabledSites.contains(site.getName()));
            enabled.setOnAction((e) -> {
                if(enabled.isSelected()) {
                    settings.disabledSites.remove(site.getName());
                } else {
                    settings.disabledSites.add(site.getName());
                }
                showRestartRequired();
            });
            GridPane.setMargin(l, new Insets(CHECKBOX_MARGIN, 0, 0, 0));
            GridPane.setMargin(enabled, new Insets(CHECKBOX_MARGIN, 0, 0, CHECKBOX_MARGIN));
            layout.add(enabled, 1, row++);
        }

        TitledPane siteSelection = new TitledPane("Enabled Sites", layout);
        siteSelection.setCollapsible(false);
        return siteSelection;
    }

    private Node createRecordLocationPanel() {
        GridPane layout = createGridLayout();
        Label l = new Label("Record Location");
        layout.add(l, 0, 0);
        recordLocation = new ToggleGroup();
        recordLocal = new RadioButton("Local");
        recordRemote = new RadioButton("Remote");
        recordLocal.setToggleGroup(recordLocation);
        recordRemote.setToggleGroup(recordLocation);
        recordLocal.setSelected(Config.getInstance().getSettings().localRecording);
        recordRemote.setSelected(!recordLocal.isSelected());
        layout.add(recordLocal, 1, 0);
        layout.add(recordRemote, 2, 0);
        recordLocation.selectedToggleProperty().addListener((e) -> {
            Config.getInstance().getSettings().localRecording = recordLocal.isSelected();
            setRecordingMode(recordLocal.isSelected());
            showRestartRequired();
        });
        GridPane.setMargin(l, new Insets(0, 0, CHECKBOX_MARGIN, 0));
        GridPane.setMargin(recordLocal, new Insets(0, 0, CHECKBOX_MARGIN, 0));
        GridPane.setMargin(recordRemote, new Insets(0, 0, CHECKBOX_MARGIN, 0));

        layout.add(new Label("Server"), 0, 1);
        server = new TextField(Config.getInstance().getSettings().httpServer);
        server.focusedProperty().addListener((e) -> {
            if(!server.getText().isEmpty()) {
                Config.getInstance().getSettings().httpServer = server.getText();
            }
        });
        GridPane.setFillWidth(server, true);
        GridPane.setHgrow(server, Priority.ALWAYS);
        GridPane.setColumnSpan(server, 2);
        layout.add(server, 1, 1);

        layout.add(new Label("Port"), 0, 2);
        port = new TextField(Integer.toString(Config.getInstance().getSettings().httpPort));
        port.focusedProperty().addListener((e) -> {
            if(!port.getText().isEmpty()) {
                try {
                    Config.getInstance().getSettings().httpPort = Integer.parseInt(port.getText());
                    port.setBorder(Border.EMPTY);
                    port.setTooltip(null);
                } catch (NumberFormatException e1) {
                    port.setBorder(new Border(new BorderStroke(Color.RED, BorderStrokeStyle.DASHED, new CornerRadii(2), new BorderWidths(2))));
                    port.setTooltip(new Tooltip("Port has to be a number in the range 1 - 65536"));
                }
            }
        });
        GridPane.setFillWidth(port, true);
        GridPane.setHgrow(port, Priority.ALWAYS);
        GridPane.setColumnSpan(port, 2);
        layout.add(port, 1, 2);

        l = new Label("Require authentication");
        layout.add(l, 0, 3);
        secureCommunication.setSelected(Config.getInstance().getSettings().requireAuthentication);
        secureCommunication.setOnAction((e) -> {
            Config.getInstance().getSettings().requireAuthentication = secureCommunication.isSelected();
            if(secureCommunication.isSelected()) {
                byte[] key = Config.getInstance().getSettings().key;
                if(key == null) {
                    key = Hmac.generateKey();
                    Config.getInstance().getSettings().key = key;
                }
                TextInputDialog keyDialog = new TextInputDialog();
                keyDialog.setResizable(true);
                keyDialog.setTitle("Server Authentication");
                keyDialog.setHeaderText("A key has been generated");
                keyDialog.setContentText("Add this setting to your server's config.json:\n");
                keyDialog.getEditor().setText("\"key\": " + Arrays.toString(key));
                keyDialog.getEditor().setEditable(false);
                keyDialog.setWidth(800);
                keyDialog.setHeight(200);
                keyDialog.show();
            }
        });
        GridPane.setMargin(l, new Insets(4, CHECKBOX_MARGIN, 0, 0));
        GridPane.setMargin(secureCommunication, new Insets(4, 0, 0, 0));
        layout.add(secureCommunication, 1, 3);

        TitledPane recordLocation = new TitledPane("Record Location", layout);
        recordLocation.setCollapsible(false);
        return recordLocation;
    }

    private Node createLocationsPanel() {
        int row = 0;
        GridPane layout = createGridLayout();
        layout.add(new Label("Recordings Directory"), 0, row);
        recordingsDirectory = new TextField(Config.getInstance().getSettings().recordingsDir);
        recordingsDirectory.focusedProperty().addListener(createRecordingsDirectoryFocusListener());
        recordingsDirectory.setPrefWidth(400);
        GridPane.setFillWidth(recordingsDirectory, true);
        GridPane.setHgrow(recordingsDirectory, Priority.ALWAYS);
        GridPane.setColumnSpan(recordingsDirectory, 2);
        GridPane.setMargin(recordingsDirectory, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        layout.add(recordingsDirectory, 1, row);
        recordingsDirectoryButton = createRecordingsBrowseButton();
        layout.add(recordingsDirectoryButton, 3, row++);

        layout.add(new Label("Directory Structure"), 0, row);
        List<DirectoryStructure> options = new ArrayList<>();
        options.add(FLAT);
        options.add(ONE_PER_MODEL);
        options.add(ONE_PER_RECORDING);
        directoryStructure = new ComboBox<>(FXCollections.observableList(options));
        directoryStructure.setValue(Config.getInstance().getSettings().recordingsDirStructure);
        directoryStructure.setOnAction((evt) -> Config.getInstance().getSettings().recordingsDirStructure = directoryStructure.getValue());
        GridPane.setColumnSpan(directoryStructure, 2);
        GridPane.setMargin(directoryStructure, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        layout.add(directoryStructure, 1, row++);

        layout.add(new Label("Post-Processing"), 0, row);
        postProcessing = new TextField(Config.getInstance().getSettings().postProcessing);
        postProcessing.focusedProperty().addListener(createPostProcessingFocusListener());
        GridPane.setFillWidth(postProcessing, true);
        GridPane.setHgrow(postProcessing, Priority.ALWAYS);
        GridPane.setColumnSpan(postProcessing, 2);
        GridPane.setMargin(postProcessing, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        layout.add(postProcessing, 1, row);
        postProcessingDirectoryButton = createPostProcessingBrowseButton();
        layout.add(postProcessingDirectoryButton, 3, row++);

        layout.add(new Label("Player"), 0, row);
        mediaPlayer = new TextField(Config.getInstance().getSettings().mediaPlayer);
        mediaPlayer.focusedProperty().addListener(createMpvFocusListener());
        GridPane.setFillWidth(mediaPlayer, true);
        GridPane.setHgrow(mediaPlayer, Priority.ALWAYS);
        GridPane.setColumnSpan(mediaPlayer, 2);
        GridPane.setMargin(mediaPlayer, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        layout.add(mediaPlayer, 1, row);
        layout.add(createMpvBrowseButton(), 3, row++);

        TitledPane locations = new TitledPane("Locations", layout);
        locations.setCollapsible(false);
        return locations;
    }

    private Node createGeneralPanel() {
        GridPane layout = createGridLayout();
        int row = 0;
        Label l = new Label("Display stream resolution in overview");
        layout.add(l, 0, row);
        loadResolution = new CheckBox();
        loadResolution.setSelected(Config.getInstance().getSettings().determineResolution);
        loadResolution.setOnAction((e) -> {
            Config.getInstance().getSettings().determineResolution = loadResolution.isSelected();
            if(!loadResolution.isSelected()) {
                ThumbOverviewTab.queue.clear();
            }
        });
        //GridPane.setMargin(l, new Insets(CHECKBOX_MARGIN, 0, 0, 0));
        GridPane.setMargin(loadResolution, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        layout.add(loadResolution, 1, row++);

        l = new Label("Allow multiple players");
        layout.add(l, 0, row);
        multiplePlayers.setSelected(!Config.getInstance().getSettings().singlePlayer);
        multiplePlayers.setOnAction((e) -> Config.getInstance().getSettings().singlePlayer = !multiplePlayers.isSelected());
        GridPane.setMargin(l, new Insets(3, 0, 0, 0));
        GridPane.setMargin(multiplePlayers, new Insets(CHECKBOX_MARGIN, 0, 0, CHECKBOX_MARGIN));
        layout.add(multiplePlayers, 1, row++);

        l = new Label("Manually select stream quality");
        layout.add(l, 0, row);
        chooseStreamQuality.setSelected(Config.getInstance().getSettings().chooseStreamQuality);
        chooseStreamQuality.setOnAction((e) -> Config.getInstance().getSettings().chooseStreamQuality = chooseStreamQuality.isSelected());
        GridPane.setMargin(l, new Insets(CHECKBOX_MARGIN, 0, 0, 0));
        GridPane.setMargin(chooseStreamQuality, new Insets(CHECKBOX_MARGIN, 0, 0, CHECKBOX_MARGIN));
        layout.add(chooseStreamQuality, 1, row++);

        l = new Label("Maximum resolution (0 = unlimited)");
        layout.add(l, 0, row);
        List<Integer> resolutionOptions = new ArrayList<>();
        resolutionOptions.add(1080);
        resolutionOptions.add(720);
        resolutionOptions.add(600);
        resolutionOptions.add(480);
        resolutionOptions.add(0);
        maxResolution = new ComboBox<>(FXCollections.observableList(resolutionOptions));
        setMaxResolutionValue();
        maxResolution.setOnAction((e) -> Config.getInstance().getSettings().maximumResolution = maxResolution.getSelectionModel().getSelectedItem());
        layout.add(maxResolution, 1, row++);
        GridPane.setMargin(l, new Insets(CHECKBOX_MARGIN, 0, 0, 0));
        GridPane.setMargin(maxResolution, new Insets(CHECKBOX_MARGIN, 0, 0, CHECKBOX_MARGIN));

        l = new Label("Split recordings after (minutes)");
        layout.add(l, 0, row);
        List<SplitAfterOption> options = new ArrayList<>();
        options.add(new SplitAfterOption("disabled", 0));
        options.add(new SplitAfterOption("10 min", 10 * 60));
        options.add(new SplitAfterOption("15 min", 15 * 60));
        options.add(new SplitAfterOption("20 min", 20 * 60));
        options.add(new SplitAfterOption("30 min", 30 * 60));
        options.add(new SplitAfterOption("60 min", 60 * 60));
        splitAfter = new ComboBox<>(FXCollections.observableList(options));
        layout.add(splitAfter, 1, row++);
        setSplitAfterValue();
        splitAfter.setOnAction((e) -> Config.getInstance().getSettings().splitRecordings = splitAfter.getSelectionModel().getSelectedItem().getValue());
        GridPane.setMargin(l, new Insets(0, 0, 0, 0));
        GridPane.setMargin(splitAfter, new Insets(0, 0, 0, CHECKBOX_MARGIN));
        maxResolution.prefWidthProperty().bind(splitAfter.widthProperty());

        TitledPane general = new TitledPane("General", layout);
        general.setCollapsible(false);
        return general;
    }

    private void setSplitAfterValue() {
        int value = Config.getInstance().getSettings().splitRecordings;
        for (SplitAfterOption option : splitAfter.getItems()) {
            if(option.getValue() == value) {
                splitAfter.getSelectionModel().select(option);
            }
        }
    }

    private void setMaxResolutionValue() {
        int value = Config.getInstance().getSettings().maximumResolution;
        for (Integer option : maxResolution.getItems()) {
            if(option == value) {
                maxResolution.getSelectionModel().select(option);
            }
        }
    }

    void showRestartRequired() {
        restartLabel.setVisible(true);
    }

    public static GridPane createGridLayout() {
        GridPane layout = new GridPane();
        layout.setPadding(new Insets(10));
        layout.setHgap(5);
        layout.setVgap(5);
        return layout;
    }

    private void setRecordingMode(boolean local) {
        server.setDisable(local);
        port.setDisable(local);
        secureCommunication.setDisable(local);
        recordingsDirectory.setDisable(!local);
        recordingsDirectoryButton.setDisable(!local);
        splitAfter.setDisable(!local);
        maxResolution.setDisable(!local);
        postProcessing.setDisable(!local);
        postProcessingDirectoryButton.setDisable(!local);
        directoryStructure.setDisable(!local);
    }

    private ChangeListener<? super Boolean> createRecordingsDirectoryFocusListener() {
        return new ChangeListener<Boolean>() {
            @Override
            public void changed(ObservableValue<? extends Boolean> arg0, Boolean oldPropertyValue, Boolean newPropertyValue) {
                if (newPropertyValue) {
                    recordingsDirectory.setBorder(Border.EMPTY);
                    recordingsDirectory.setTooltip(null);
                } else {
                    String input = recordingsDirectory.getText();
                    File newDir = new File(input);
                    setRecordingsDir(newDir);
                }
            }
        };
    }

    private ChangeListener<? super Boolean> createMpvFocusListener() {
        return new ChangeListener<Boolean>() {
            @Override
            public void changed(ObservableValue<? extends Boolean> arg0, Boolean oldPropertyValue, Boolean newPropertyValue) {
                if (newPropertyValue) {
                    mediaPlayer.setBorder(Border.EMPTY);
                    mediaPlayer.setTooltip(null);
                } else {
                    String input = mediaPlayer.getText();
                    File program = new File(input);
                    setMpv(program);
                }
            }
        };
    }

    private ChangeListener<? super Boolean> createPostProcessingFocusListener() {
        return new ChangeListener<Boolean>() {
            @Override
            public void changed(ObservableValue<? extends Boolean> arg0, Boolean oldPropertyValue, Boolean newPropertyValue) {
                if (newPropertyValue) {
                    postProcessing.setBorder(Border.EMPTY);
                    postProcessing.setTooltip(null);
                } else {
                    String input = postProcessing.getText();
                    if(!input.trim().isEmpty()) {
                        File program = new File(input);
                        setPostProcessing(program);
                    } else {
                        Config.getInstance().getSettings().postProcessing = "";
                    }
                }
            }
        };
    }

    private void setMpv(File program) {
        String msg = validateProgram(program);
        if (msg != null) {
            mediaPlayer.setBorder(new Border(new BorderStroke(Color.RED, BorderStrokeStyle.DASHED, new CornerRadii(2), new BorderWidths(2))));
            mediaPlayer.setTooltip(new Tooltip(msg));
        } else {
            Config.getInstance().getSettings().mediaPlayer = mediaPlayer.getText();
        }
    }

    private void setPostProcessing(File program) {
        String msg = validateProgram(program);
        if (msg != null) {
            postProcessing.setBorder(new Border(new BorderStroke(Color.RED, BorderStrokeStyle.DASHED, new CornerRadii(2), new BorderWidths(2))));
            postProcessing.setTooltip(new Tooltip(msg));
        } else {
            Config.getInstance().getSettings().postProcessing = postProcessing.getText();
        }
    }

    private String validateProgram(File program) {
        if (program == null || !program.exists()) {
            return "File does not exist";
        } else if (!program.isFile() || !program.canExecute()) {
            return "This is not an executable application";
        }
        return null;
    }

    private Button createRecordingsBrowseButton() {
        Button button = new Button("Select");
        button.setOnAction((e) -> {
            DirectoryChooser chooser = new DirectoryChooser();
            File currentDir = new File(Config.getInstance().getSettings().recordingsDir);
            if (currentDir.exists() && currentDir.isDirectory()) {
                chooser.setInitialDirectory(currentDir);
            }
            File selectedDir = chooser.showDialog(null);
            if(selectedDir != null) {
                setRecordingsDir(selectedDir);
            }
        });
        return button;
    }

    private Node createMpvBrowseButton() {
        Button button = new Button("Select");
        button.setOnAction((e) -> {
            FileChooser chooser = new FileChooser();
            File program = chooser.showOpenDialog(null);
            if(program != null) {
                try {
                    mediaPlayer.setText(program.getCanonicalPath());
                } catch (IOException e1) {
                    LOG.error("Couldn't determine path", e1);
                    Alert alert = new AutosizeAlert(Alert.AlertType.ERROR);
                    alert.setTitle("Whoopsie");
                    alert.setContentText("Couldn't determine path");
                    alert.showAndWait();
                }
                setMpv(program);
            }
        });
        return button;
    }

    private Button createPostProcessingBrowseButton() {
        Button button = new Button("Select");
        button.setOnAction((e) -> {
            FileChooser chooser = new FileChooser();
            File program = chooser.showOpenDialog(null);
            if(program != null) {
                try {
                    postProcessing.setText(program.getCanonicalPath());
                } catch (IOException e1) {
                    LOG.error("Couldn't determine path", e1);
                    Alert alert = new AutosizeAlert(Alert.AlertType.ERROR);
                    alert.setTitle("Whoopsie");
                    alert.setContentText("Couldn't determine path");
                    alert.showAndWait();
                }
                setPostProcessing(program);
            }
        });
        return button;
    }

    private void setRecordingsDir(File dir) {
        if (dir != null && dir.isDirectory()) {
            try {
                String path = dir.getCanonicalPath();
                Config.getInstance().getSettings().recordingsDir = path;
                recordingsDirectory.setText(path);
            } catch (IOException e1) {
                LOG.error("Couldn't determine directory path", e1);
                Alert alert = new AutosizeAlert(Alert.AlertType.ERROR);
                alert.setTitle("Whoopsie");
                alert.setContentText("Couldn't determine directory path");
                alert.showAndWait();
            }
        } else {
            recordingsDirectory.setBorder(new Border(new BorderStroke(Color.RED, BorderStrokeStyle.DASHED, new CornerRadii(2), new BorderWidths(2))));
            if (!dir.isDirectory()) {
                recordingsDirectory.setTooltip(new Tooltip("This is not a directory"));
            }
            if (!dir.exists()) {
                recordingsDirectory.setTooltip(new Tooltip("Directory does not exist"));
            }

        }
    }

    @Override
    public void selected() {
    }

    @Override
    public void deselected() {
        saveConfig();
    }

    public void saveConfig() {
        proxySettingsPane.saveConfig();
    }

    public static class SplitAfterOption {
        private String label;
        private int value;

        public SplitAfterOption(String label, int value) {
            super();
            this.label = label;
            this.value = value;
        }

        public int getValue() {
            return value;
        }

        @Override
        public String toString() {
            return label;
        }
    }
}