/*
 * Copyright (c) 2006-2017 DMDirc Developers
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.dmdirc.addons.nickcolours;

import com.dmdirc.addons.ui_swing.EDTInvocation;
import com.dmdirc.addons.ui_swing.UIUtilities;
import com.dmdirc.addons.ui_swing.components.IconManager;
import com.dmdirc.addons.ui_swing.injection.MainWindow;
import com.dmdirc.commandline.CommandLineOptionsModule.Directory;
import com.dmdirc.commandline.CommandLineOptionsModule.DirectoryType;
import com.dmdirc.config.ConfigBinder;
import com.dmdirc.config.ConfigBinding;
import com.dmdirc.config.GlobalConfig;
import com.dmdirc.config.prefs.PluginPreferencesCategory;
import com.dmdirc.config.prefs.PreferencesCategory;
import com.dmdirc.config.prefs.PreferencesSetting;
import com.dmdirc.config.prefs.PreferencesType;
import com.dmdirc.events.ChannelGotNamesEvent;
import com.dmdirc.events.ChannelJoinEvent;
import com.dmdirc.events.ClientPrefsOpenedEvent;
import com.dmdirc.events.DisplayProperty;
import com.dmdirc.events.eventbus.EventBus;
import com.dmdirc.interfaces.GroupChatUser;
import com.dmdirc.interfaces.User;
import com.dmdirc.interfaces.config.AggregateConfigProvider;
import com.dmdirc.parser.interfaces.StringConverter;
import com.dmdirc.plugins.PluginDomain;
import com.dmdirc.plugins.PluginInfo;
import com.dmdirc.ui.messages.ColourManager;
import com.dmdirc.util.colours.Colour;
import java.awt.Color;
import java.awt.Window;
import java.nio.file.Path;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import net.engio.mbassy.listener.Handler;

/**
 * Provides various features related to nickname colouring.
 */
@Singleton
public class NickColourManager {

    private static final String[] DEFAULT_RANDOM_COLOURS =
            {"E90E7F", "8E55E9", "B30E0E", "18B33C", "58ADB3", "9E54B3", "B39875", "3176B3"};

    /** Manager to parse colours with. */
    private final ColourManager colourManager;
    private final ConfigBinder configBinder;
    private final IconManager iconManager;
    private final Provider<Window> mainWindowProvider;
    private final EventBus eventBus;
    private final NickColourYamlStore nickColourYamlStore;
    private final Path path;
    private final PluginInfo pluginInfo;
    private String[] randColours = DEFAULT_RANDOM_COLOURS;
    private boolean useowncolour;
    private String owncolour;
    private boolean userandomcolour;
    private Map<String, Color> nickColours;

    @Inject
    public NickColourManager(
            @GlobalConfig final ColourManager colourManager,
            @PluginDomain(NickColourPlugin.class) final String domain,
            @GlobalConfig final AggregateConfigProvider globalConfig,
            final IconManager iconManager,
            @MainWindow final Provider<Window> mainWindowProvider,
            @PluginDomain(NickColourPlugin.class) final PluginInfo pluginInfo,
            final EventBus eventBus,
            final NickColourYamlStore nickColourYamlStore,
            @Directory(DirectoryType.BASE) final Path path) {
        this.colourManager = colourManager;
        this.iconManager = iconManager;
        this.mainWindowProvider = mainWindowProvider;
        this.pluginInfo = pluginInfo;
        this.eventBus = eventBus;
        this.nickColourYamlStore = nickColourYamlStore;
        this.path = path;
        configBinder = globalConfig.getBinder().withDefaultDomain(domain);
    }

    @Handler
    public void handleChannelNames(final ChannelGotNamesEvent event) {
        final String network = event.getChannel().getConnection().get().getNetwork();
        event.getChannel().getUsers().forEach(client -> colourClient(network, client));
    }

    @Handler
    public void handleChannelJoin(final ChannelJoinEvent event) {
        final String network = event.getChannel().getConnection().get().getNetwork();
        colourClient(network, event.getClient());
    }

    /**
     * Colours the specified client according to the user's config.
     *
     * @param network The network to use for the colouring
     * @param client  The client to be coloured
     */
    private void colourClient(final String network, final GroupChatUser client) {
        final StringConverter sc = client.getUser().getConnection().getParser().get()
                .getStringConverter();
        final User myself = client.getUser().getConnection().getLocalUser().orElse(null);
        final String nickOption1 = sc.toLowerCase(network + ':' + client.getNickname());
        final String nickOption2 = sc.toLowerCase("*:" + client.getNickname());

        if (useowncolour && client.getUser().equals(myself)) {
            final Colour color = colourManager.getColourFromString(owncolour, null);
            putColour(client, color);
        } else if (userandomcolour) {
            putColour(client, getColour(client.getNickname()));
        }

        Color color = null;
        if (nickColours.containsKey(nickOption1)) {
            color = nickColours.get(nickOption1);
        } else if (nickColours.containsKey(nickOption2)) {
            color = nickColours.get(nickOption2);
        }
        if (color != null) {
            putColour(client, NickColourUtils.getColourfromColor(color));
        }
    }

    /**
     * Puts the specified colour into the given map. The keys are determined by config settings.
     *
     * @param user       The map to colour
     * @param colour     Text colour to be inserted
     */
    private void putColour(final GroupChatUser user, final Colour colour) {
        user.setDisplayProperty(DisplayProperty.FOREGROUND_COLOUR, colour);
    }

    /**
     * Retrieves a pseudo-random colour for the specified nickname.
     *
     * @param nick The nickname of the client whose colour we're determining
     *
     * @return Colour of the specified nickname
     */
    private Colour getColour(final CharSequence nick) {
        int count = 0;

        for (int i = 0; i < nick.length(); i++) {
            count += nick.charAt(i);
        }

        count %= randColours.length;

        return colourManager.getColourFromString(randColours[count], null);
    }

    /**
     * Loads this plugin.
     */
    public void onLoad() {
        eventBus.subscribe(this);
        configBinder.bind(this, NickColourManager.class);
        nickColours = nickColourYamlStore.readNickColourEntries(path.resolve("nickcolours.yml"));
    }

    /**
     * Unloads this plugin.
     */
    public void onUnload() {
        eventBus.unsubscribe(this);
        configBinder.unbind(this);
        saveNickColourStore(nickColours);
    }

    public void saveNickColourStore(final Map<String, Color> savingNickColours) {
        nickColourYamlStore.writeNickColourEntries(path.resolve("nickcolours.yml"), savingNickColours);
    }

    @ConfigBinding(key = "useowncolour", invocation = EDTInvocation.class)
    public void handleUseOwnColour(final boolean value) {
        useowncolour = value;
    }

    @ConfigBinding(key = "userandomcolour", invocation = EDTInvocation.class)
    public void handleUseRandomColour(final boolean value) {
        userandomcolour = value;
    }

    @ConfigBinding(key = "owncolour", invocation = EDTInvocation.class)
    public void handleOwnColour(final String value) {
        owncolour = value;
    }

    @ConfigBinding(key = "randomcolours", invocation = EDTInvocation.class)
    public void handleRandomColours(final List<String> value) {
        randColours = value.isEmpty() ? DEFAULT_RANDOM_COLOURS : value.toArray(new String[value.size()]);
    }

    @Handler
    public void handlePrefsOpened(final ClientPrefsOpenedEvent event) {
        final PreferencesCategory general =
                new PluginPreferencesCategory(pluginInfo, "Nick Colours",
                        "General configuration for NickColour plugin.");
        final PreferencesCategory colours = new PluginPreferencesCategory(pluginInfo, "Colours",
                "Set colours for specific nicknames.", UIUtilities.invokeAndWait(
                () -> new NickColourPanel(mainWindowProvider.get(), iconManager,
                        colourManager, this, nickColours)));

        general.addSetting(new PreferencesSetting(PreferencesType.BOOLEAN, pluginInfo.getDomain(),
                        "userandomcolour", "Use random colour",
                        "Use a pseudo-random colour for each person?",
                        event.getModel().getConfigManager(), event.getModel().getIdentity()));
        general.addSetting(new PreferencesSetting(PreferencesType.BOOLEAN, pluginInfo.getDomain(),
                        "useowncolour", "Use colour for own nick",
                        "Always use the same colour for our own nickname?",
                        event.getModel().getConfigManager(), event.getModel().getIdentity()));
        general.addSetting(new PreferencesSetting(PreferencesType.COLOUR, pluginInfo.getDomain(),
                        "owncolour", "Colour to use for own nick",
                        "Colour used for our own nickname, if above setting is enabled.",
                        event.getModel().getConfigManager(), event.getModel().getIdentity()));

        general.addSubCategory(colours);
        event.getModel().getCategory("Plugins").addSubCategory(general);
    }

}