package eu.olli.cowmoonication.command;

import eu.olli.cowmoonication.Cowmoonication;
import eu.olli.cowmoonication.config.MooConfig;
import eu.olli.cowmoonication.config.MooGuiConfig;
import eu.olli.cowmoonication.util.TickDelay;
import eu.olli.cowmoonication.util.Utils;
import net.minecraft.client.Minecraft;
import net.minecraft.command.CommandBase;
import net.minecraft.command.CommandException;
import net.minecraft.command.ICommandSender;
import net.minecraft.event.ClickEvent;
import net.minecraft.event.HoverEvent;
import net.minecraft.util.*;

import java.awt.*;
import java.io.IOException;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;

public class MooCommand extends CommandBase {
    private final Cowmoonication main;

    public MooCommand(Cowmoonication main) {
        this.main = main;
    }

    @Override
    public void processCommand(ICommandSender sender, String[] args) throws CommandException {
        if (args.length == 0) {
            main.getChatHelper().sendMessage(new ChatComponentTranslation(getCommandUsage(sender)));
            return;
        }
        // sub commands: friends
        if (args.length == 2 && args[0].equalsIgnoreCase("add")) {
            handleBestFriendAdd(args[1]);
        } else if (args.length == 2 && args[0].equalsIgnoreCase("remove")) {
            handleBestFriendRemove(args[1]);
        } else if (args[0].equalsIgnoreCase("list")) {
            handleListBestFriends();
        } else if (args[0].equalsIgnoreCase("nameChangeCheck")) {
            main.getChatHelper().sendMessage(EnumChatFormatting.GOLD, "Looking for best friends that have changed their name... This will take a few seconds...");
            main.getFriends().updateBestFriends(true);
        } else if (args[0].equalsIgnoreCase("toggle")) {
            main.getConfig().toggleNotifications();
            main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "\u2714 Switched all non-best friend login/logout notifications " + (MooConfig.filterFriendNotifications ? EnumChatFormatting.DARK_GREEN + "off" : EnumChatFormatting.DARK_RED + "on"));
        }
        // sub-commands: miscellaneous
        else if (args[0].equalsIgnoreCase("config")) {
            new TickDelay(() -> Minecraft.getMinecraft().displayGuiScreen(new MooGuiConfig(null)), 1); // delay by 1 tick, because the chat closing would close the new gui instantly as well.
        } else if (args[0].equalsIgnoreCase("guiscale")) {
            int currentGuiScale = (Minecraft.getMinecraft()).gameSettings.guiScale;
            if (args.length == 1) {
                main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "\u279C Current GUI scale: " + EnumChatFormatting.DARK_GREEN + currentGuiScale);
            } else {
                int scale = Math.min(10, MathHelper.parseIntWithDefault(args[1], 6));
                Minecraft.getMinecraft().gameSettings.guiScale = scale;
                main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "\u2714 New GUI scale: " + EnumChatFormatting.DARK_GREEN + scale + EnumChatFormatting.GREEN + " (previous: " + EnumChatFormatting.DARK_GREEN + currentGuiScale + EnumChatFormatting.GREEN + ")");
            }
        }
        // sub-commands: update mod
        else if (args[0].equalsIgnoreCase("update")) {
            boolean updateCheckStarted = main.getVersionChecker().runUpdateCheck(true);

            if (updateCheckStarted) {
                main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "\u279C Checking for a newer mod version...");
                // VersionChecker#handleVersionStatus will run with a 5 seconds delay
            } else {
                long nextUpdate = main.getVersionChecker().getNextCheck();
                String waitingTime = String.format("%02d:%02d",
                        TimeUnit.MILLISECONDS.toMinutes(nextUpdate),
                        TimeUnit.MILLISECONDS.toSeconds(nextUpdate) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(nextUpdate)));
                main.getChatHelper().sendMessage(EnumChatFormatting.RED, "\u26A0 Update checker is on cooldown. Please wait " + EnumChatFormatting.GOLD + EnumChatFormatting.BOLD + waitingTime + EnumChatFormatting.RESET + EnumChatFormatting.RED + " more minutes before checking again.");
            }
        } else if (args[0].equalsIgnoreCase("updateHelp")) {
            main.getChatHelper().sendMessage(new ChatComponentText("\u279C Update instructions:").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(true))
                    .appendSibling(new ChatComponentText("\n\u278A" + EnumChatFormatting.YELLOW + " download latest mod version").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(false)
                            .setChatClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, main.getVersionChecker().getDownloadUrl()))
                            .setChatHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ChatComponentText(EnumChatFormatting.YELLOW + "Download the latest version of Cowmoonication\n\u279C Click to download latest mod file")))))
                    .appendSibling(new ChatComponentText("\n\u278B" + EnumChatFormatting.YELLOW + " exit Minecraft").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(false)
                            .setChatHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ChatComponentText(EnumChatFormatting.GOLD + "\u278B" + EnumChatFormatting.YELLOW + " Without closing Minecraft first,\n" + EnumChatFormatting.YELLOW + "you can't delete the old .jar file!")))))
                    .appendSibling(new ChatComponentText("\n\u278C" + EnumChatFormatting.YELLOW + " copy " + EnumChatFormatting.GOLD + "Cowmoonication-" + main.getVersionChecker().getNewVersion() + ".jar" + EnumChatFormatting.YELLOW + " into mods folder").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(false)
                            .setChatClickEvent(new ClickEvent(ClickEvent.Action.RUN_COMMAND, "/moo folder"))
                            .setChatHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ChatComponentText(EnumChatFormatting.YELLOW + "Open mods folder with command " + EnumChatFormatting.GOLD + "/moo folder\n\u279C Click to open mods folder")))))
                    .appendSibling(new ChatComponentText("\n\u278D" + EnumChatFormatting.YELLOW + " delete old mod file " + EnumChatFormatting.GOLD + "Cowmoonication-" + Cowmoonication.VERSION + ".jar ").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(false)))
                    .appendSibling(new ChatComponentText("\n\u278E" + EnumChatFormatting.YELLOW + " start Minecraft again").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(false))));
        } else if (args[0].equalsIgnoreCase("version")) {
            main.getVersionChecker().handleVersionStatus(true);
        } else if (args[0].equalsIgnoreCase("folder")) {
            try {
                Desktop.getDesktop().open(main.getModsFolder());
            } catch (IOException e) {
                main.getChatHelper().sendMessage(EnumChatFormatting.RED, "\u2716 An error occurred trying to open the mod's folder. I guess you have to open it manually \u00af\\_(\u30c4)_/\u00af");
                e.printStackTrace();
            }
        }
        // "catch-all" remaining sub-commands
        else {
            main.getChatHelper().sendMessage(new ChatComponentTranslation(getCommandUsage(sender)));
        }
    }

    private void handleBestFriendAdd(String username) {
        if (!Utils.isValidMcName(username)) {
            main.getChatHelper().sendMessage(EnumChatFormatting.RED, EnumChatFormatting.DARK_RED + username + EnumChatFormatting.RED + "? This... doesn't look like a valid username.");
            return;
        }

        // TODO Add check if 'best friend' is on normal friend list
        if (main.getFriends().isBestFriend(username, true)) {
            main.getChatHelper().sendMessage(EnumChatFormatting.RED, EnumChatFormatting.DARK_RED + username + EnumChatFormatting.RED + " is a best friend already.");
        } else {
            main.getChatHelper().sendMessage(EnumChatFormatting.GOLD, "Fetching " + EnumChatFormatting.YELLOW + username + EnumChatFormatting.GOLD + "'s unique user id. This may take a few seconds...");
            // add friend async
            main.getFriends().addBestFriend(username);
        }
    }

    private void handleBestFriendRemove(String username) {
        if (!Utils.isValidMcName(username)) {
            main.getChatHelper().sendMessage(EnumChatFormatting.RED, EnumChatFormatting.DARK_RED + username + EnumChatFormatting.RED + "? This... doesn't look like a valid username.");
            return;
        }

        boolean removed = main.getFriends().removeBestFriend(username);
        if (removed) {
            main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "Removed " + EnumChatFormatting.DARK_GREEN + username + EnumChatFormatting.GREEN + " from best friends list.");
        } else {
            main.getChatHelper().sendMessage(EnumChatFormatting.RED, EnumChatFormatting.DARK_RED + username + EnumChatFormatting.RED + " isn't a best friend.");
        }
    }

    private void handleListBestFriends() {
        Set<String> bestFriends = main.getFriends().getBestFriends();

        // TODO show fancy gui with list of best friends; maybe with buttons to delete them
        main.getChatHelper().sendMessage(EnumChatFormatting.GREEN, "\u279C Best friends: " + EnumChatFormatting.DARK_GREEN + String.join(EnumChatFormatting.GREEN + ", " + EnumChatFormatting.DARK_GREEN, bestFriends));
    }

    @Override
    public String getCommandName() {
        return "moo";
    }

    @Override
    public String getCommandUsage(ICommandSender sender) {
        IChatComponent usage = new ChatComponentText("\u279C Cowmoonication commands:").setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(true))
                .appendSibling(createCmdHelpSection(1, "Friends"))
                .appendSibling(createCmdHelpEntry("add", "Add best friends"))
                .appendSibling(createCmdHelpEntry("remove", "Remove best friends"))
                .appendSibling(createCmdHelpEntry("list", "View list of best friends"))
                .appendSibling(createCmdHelpEntry("nameChangeCheck", "Force a scan for changed names of best friends"))
                .appendSibling(createCmdHelpEntry("toggle", "Toggle show/hide all join/leave notifications"))
                .appendSibling(createCmdHelpSection(2, "Miscellaneous"))
                .appendSibling(createCmdHelpEntry("config", "Open mod's configuration"))
                .appendSibling(createCmdHelpEntry("guiScale", "Change GUI scale"))
                .appendSibling(createCmdHelpSection(3, "Update mod"))
                .appendSibling(createCmdHelpEntry("update", "Check for new mod updates"))
                .appendSibling(createCmdHelpEntry("updateHelp", "Show mod update instructions"))
                .appendSibling(createCmdHelpEntry("version", "View results of last mod update check"))
                .appendSibling(createCmdHelpEntry("folder", "Open Minecraft's mods folder"));
        sender.addChatMessage(usage);
        return "";
    }

    private IChatComponent createCmdHelpSection(int nr, String title) {
        String prefix = Character.toString((char) (0x2789 + nr));
        return new ChatComponentText("\n").appendSibling(new ChatComponentText(prefix + " " + title).setChatStyle(new ChatStyle().setColor(EnumChatFormatting.GOLD).setBold(true)));
    }

    private IChatComponent createCmdHelpEntry(String cmd, String usage) {
        String command = "/" + this.getCommandName() + " " + cmd;
        ChatStyle clickableMsg = new ChatStyle()
                .setChatHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new ChatComponentText(EnumChatFormatting.YELLOW + "Run " + EnumChatFormatting.GOLD + command)))
                .setChatClickEvent(new ClickEvent(ClickEvent.Action.SUGGEST_COMMAND, command));
        return new ChatComponentText("\n").appendSibling(new ChatComponentText(command).setChatStyle(clickableMsg.createDeepCopy().setColor(EnumChatFormatting.GOLD)))
                .appendSibling(new ChatComponentText(" \u27A1 " + usage).setChatStyle(clickableMsg.createDeepCopy().setColor(EnumChatFormatting.YELLOW)));
    }

    @Override
    public int getRequiredPermissionLevel() {
        return 0;
    }

    @Override
    public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
        if (args.length == 1) {
            return getListOfStringsMatchingLastWord(args,
                    /* friends */  "add", "remove", "list", "nameChangeCheck", "toggle",
                    /* miscellaneous */ "guiscale", "config",
                    /* update mod */ "update", "updateHelp", "version", "folder",
                    /* help */ "help");
        }
        return null;
    }
}