package net.uomc.mineshaft;

import com.mouldycheerio.dbot.CustomBot;
import com.mouldycheerio.dbot.commands.CommandDetails;
import com.mouldycheerio.dbot.commands.CommandFail;
import com.mouldycheerio.dbot.commands.DetailedCommand;

import com.mouldycheerio.dbot.util.PeelingUtils;
import com.vdurmont.emoji.EmojiParser;

import net.dv8tion.jda.api.EmbedBuilder;
import net.dv8tion.jda.api.events.message.MessageReceivedEvent;

public class EnchantCommand extends DetailedCommand {

    private static final String COMMAND_IMAGE = "https://minecraft.wiki/images/Enchanting_Table.gif";
    private static final double MIN_DISCOUNT = 0.4;
    private static final double MAX_BOOKSHELVES = 24;
    private static final String COMMAND_TITLE = "Enchanting Table";
    Mineshaft bot;

    public EnchantCommand(Mineshaft bot) {
        setCommandDetails(CommandDetails.from("enchant,enchanting,ench,etable,enchantingtable", "", "enchant"));
        this.bot = bot;
    }

    @Override
    public void execute(MessageReceivedEvent e, CustomBot b, String[] args) throws CommandFail  {

        long ench_tables = bot.getItem(e.getMember(), MineshaftItem.ENCHANTING_TABLE);

        if (ench_tables < 1) {
            b.sendErrorMessage(e, ":x: You need to have at least **"
                    + bot.getItem(MineshaftItem.ENCHANTING_TABLE).prettyValue(1)
                    + "** to use this!");
            return;
        }

        if (args.length > 0) {
            enchant(e, args);
            return;
        }

        int fortune = bot.getPickaxes().getPickaxeFortune(e.getMember());
        long bookshelves = bot.getItem(e.getMember(), MineshaftItem.BOOKSHELF);
        String bookshelfDiscountPercent = "-" + (int) Math.ceil((1 -bookshelfDiscount(bookshelves))*100) + "%";
        long xpLevel = getXpLevel(fortune, bookshelves);
        long lapisLevel = getLapisLevel(fortune, bookshelves);

        long xpLevelNormal = getXpLevel(fortune, 0);
        long lapisLevelNormal = getLapisLevel(fortune, 0);

        String curr = "";
        if (fortune > 0) {
            curr = "Your pickaxe has **Fortune " + Pickaxes.getRomanNumber(fortune) + "**\n\n";
        }

        String description = curr + "Enchant your pickaxe with `" + b.getPrefixManager().getPrefix(e.getGuild()) + "enchant fortune`\n\n";

        description += "**Cost:**\n";

        if (bookshelves > 0)
            description += "~~" + PeelingUtils.amountToString(lapisLevelNormal) + "~~ ";

        description += "**" + bot.getItem(MineshaftItem.LAPIS).prettyValue(lapisLevel) + "**";
        description += "\n";

        if (bookshelves > 0)
            description += "~~" + PeelingUtils.amountToString(xpLevelNormal) + "~~ ";

        description += "**" + bot.getItem(MineshaftItem.XP).prettyValue(xpLevel) + "**";

        if (bookshelves > 0) {
            description += "\n\nYour ";
            description += bot.getItem(MineshaftItem.BOOKSHELF).prettyValue(bookshelves);
            description += " are giving you a **" + bookshelfDiscountPercent + "** discount!";
        }

        EmbedBuilder em = new EmbedBuilder();
        em.setTitle(COMMAND_TITLE);
        em.setDescription(description);
        em.setThumbnail(COMMAND_IMAGE);
        em.setColor(PeelingUtils.hex2Rgb("#0a0711"));

        if (bookshelves == 0) {
            em.setFooter(EmojiParser.parseToUnicode(":bulb:") + "Bookshelves give you a discount on your enchantments");
        }

        e.getMessage().replyEmbeds(em.build()).queue();
    }

    private long getLapisLevel(int fortune, long bookshelves) {
        return (long) (Math.pow(2, fortune + 4) * bookshelfDiscount(bookshelves));
    }

    private double bookshelfDiscount(long bookshelves) {
        double b = Math.min(bookshelves, MAX_BOOKSHELVES);
        return MIN_DISCOUNT + Math.log10( 1.0 + (9.0 * ((MAX_BOOKSHELVES - b) / MAX_BOOKSHELVES))) * MIN_DISCOUNT;
    }

    private long getXpLevel(int fortune, long bookshelves) {
        return (long) (15000l * Math.pow(fortune + 1, 2) * bookshelfDiscount(bookshelves));
    }

    private void enchant(MessageReceivedEvent e, String[] args) {
        int fortune = bot.getPickaxes().getPickaxeFortune(e.getMember());
        long bookshelves = bot.getItem(e.getMember(), MineshaftItem.BOOKSHELF);
        long xpLevel = getXpLevel(fortune, bookshelves);
        long lapisLevel = getLapisLevel(fortune, bookshelves);

        long memberLapis = bot.getItem(e.getMember(), MineshaftItem.LAPIS);
        long memberXp = bot.getItem(e.getMember(), MineshaftItem.XP);

        if (memberLapis < lapisLevel) {
            bot.sendErrorMessage(e, ":x: You need " + bot.getItem(MineshaftItem.LAPIS).prettyValue(lapisLevel - memberLapis) + " more lapis!" );
            return;
        }

        if (memberXp < xpLevel) {
            bot.sendErrorMessage(e, ":x: You need " + bot.getItem(MineshaftItem.XP).prettyValue(xpLevel - memberXp) + " more xp!" );
            return;
        }

        bot.removeItem(e.getMember(), MineshaftItem.LAPIS, lapisLevel);
        bot.removeItem(e.getMember(), MineshaftItem.XP, xpLevel);
        int level = bot.getPickaxes().incrementFortune(e.getMember());

        bot.sendSuccessMessage(e, ":white_check_mark: You enchanted your pickaxe. Now it has **Fortune " + Pickaxes.getRomanNumber(level) + "**");

    }

}