package net.knarcraft.blacksmith.manager;

import net.knarcraft.blacksmith.BlacksmithPlugin;
import net.knarcraft.blacksmith.config.blacksmith.GlobalBlacksmithSettings;
import net.knarcraft.blacksmith.config.scrapper.GlobalScrapperSettings;
import net.knarcraft.blacksmith.property.SalvageMethod;
import net.knarcraft.blacksmith.util.ItemHelper;
import net.knarcraft.knarlib.formatting.StringReplacer;
import net.milkbowl.vault.economy.Economy;
import net.objecthunter.exp4j.Expression;
import net.objecthunter.exp4j.ExpressionBuilder;
import org.bukkit.Material;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.RegisteredServiceProvider;
import org.bukkit.plugin.ServicesManager;
import org.jetbrains.annotations.NotNull;

/**
 * A class which deals with everything economy
 */
public class EconomyManager {

    private static Economy economy;

    private EconomyManager() {

    }

    /**
     * Sets up Vault economy support
     *
     * @param servicesManager <p>The services manager to use for finding a Vault provider</p>
     * @return <p>True if Vault was successfully set up</p>
     */
    public static boolean setUp(@NotNull ServicesManager servicesManager) {
        //If already set up, there is nothing to do
        if (economy != null) {
            return true;
        }
        return setupVault(servicesManager);
    }

    /**
     * Gets whether the given player cannot pay for re-forging their held item
     *
     * @param player <p>The player holding an item</p>
     * @return <p>Whether the player cannot pay for the reforge</p>
     */
    public static boolean cannotPayForHeldItemReforge(@NotNull Player player) {
        return economy.getBalance(player) - getHeldItemCost(player) < 0;
    }

    /**
     * Gets whether the given player cannot pay for salvaging an item
     *
     * @param player        <p>The player holding an item</p>
     * @param salvageMethod <p>The salvage method to check</p>
     * @param item          <p>The item to be salvaged</p>
     * @return <p>Whether the player cannot pay for the salvage</p>
     */
    public static boolean cannotPayForSalvage(@NotNull Player player, @NotNull SalvageMethod salvageMethod, @NotNull ItemStack item) {
        // TODO: Account for advanced cost options
        return economy.getBalance(player) - getSalvageCost(salvageMethod, item, player) < 0;
    }

    /**
     * Gets the human-readable cost of the given player's held item
     *
     * @param player <p>The player holding an item</p>
     * @return <p>The formatted cost</p>
     */
    @NotNull
    public static String formatBlacksmithCost(@NotNull Player player) {
        double cost = getHeldItemCost(player);
        return economy.format(cost);
    }

    /**
     * Gets the human-readable cost of salvaging an item
     *
     * @param salvageMethod <p>The salvage method to get the cost for</p>
     * @param item          <p>The item to be salvaged</p>
     * @param player        <p>The player to provide the cost to</p>
     * @return <p>The formatted cost</p>
     */
    @NotNull
    public static String formatSalvageCost(@NotNull SalvageMethod salvageMethod, @NotNull ItemStack item,
                                           @NotNull Player player) {
        return economy.format(getSalvageCost(salvageMethod, item, player));
    }

    /**
     * Gets whether the given player has enough money to pay the given cost
     *
     * @param player <p>The player to check</p>
     * @param cost   <p>The required cost</p>
     * @return <p>True if the player has enough money to cover the cost</p>
     */
    public static boolean hasEnough(@NotNull Player player, double cost) {
        return economy.getBalance(player) >= cost;
    }

    /**
     * Formats a number as an economy cost
     *
     * @param cost <p>The cost to format</p>
     * @return <p>The formatted cost</p>
     */
    @NotNull
    public static String format(double cost) {
        return economy.format(cost);
    }

    /**
     * Gets the cost of salvaging using the specified method
     *
     * @param salvageMethod <p>The salvage method to get cost for</p>
     * @param item          <p>The item to be salvaged</p>
     * @return <p>The salvage cost</p>
     */
    private static double getSalvageCost(@NotNull SalvageMethod salvageMethod, @NotNull ItemStack item,
                                         @NotNull Player player) {
        GlobalScrapperSettings settings = BlacksmithPlugin.getInstance().getGlobalScrapperSettings();
        double baseCost = switch (salvageMethod) {
            case SALVAGE, EXTENDED_SALVAGE -> settings.getSalvageCost();
            case NETHERITE -> settings.getNetheriteSalvageCost();
            case ARMOR_TRIM -> settings.getArmorTrimSalvageCost();
            case ENCHANTED_BOOK -> getEnchantedBookSalvageCost(item);
        };

        StringReplacer replacer = new StringReplacer(settings.getSalvageCostIncrease());
        replacer.add("{cost}", String.valueOf(baseCost));
        replacer.add("{timesUsed}", String.valueOf(PlayerUsageManager.getUsages(player,
                System.currentTimeMillis() - 3600000)));
        Expression expression = new ExpressionBuilder(replacer.replace()).build();
        return Math.max(expression.evaluate(), baseCost);
    }

    /**
     * Withdraws the reforging cost from the given player
     *
     * <p>The cost is automatically calculated from the item in the player's main hand.</p>
     *
     * @param player <p>The player to withdraw from</p>
     */
    public static void withdrawBlacksmith(@NotNull Player player) {
        double cost = getHeldItemCost(player);
        if (cost > 0) {
            economy.withdrawPlayer(player, cost);
        }
    }

    /**
     * Withdraws the salvaging cost from the given player
     *
     * @param player        <p>The player to withdraw from</p>
     * @param salvageMethod <p>The salvage method to withdraw for</p>
     */
    public static void withdrawScrapper(@NotNull Player player, @NotNull SalvageMethod salvageMethod) {
        double cost = getSalvageCost(salvageMethod, player.getInventory().getItemInMainHand(), player);
        if (cost > 0) {
            economy.withdrawPlayer(player, cost);
        }
    }

    /**
     * Withdraws money from a player
     *
     * @param player       <p>The player to withdraw from</p>
     * @param monetaryCost <p>The cost to withdraw</p>
     * @throws IllegalArgumentException <p>If a negative cost is given</p>
     */
    public static void withdraw(@NotNull Player player, double monetaryCost) {
        if (monetaryCost < 0) {
            throw new IllegalArgumentException("Cannot withdraw a negative amount");
        }
        economy.withdrawPlayer(player, monetaryCost);
    }

    /**
     * Gets the cost of the item in the given player's main hand
     *
     * @param player <p>The player to calculate the cost for</p>
     * @return <p>The calculated cost</p>
     */
    private static double getHeldItemCost(@NotNull Player player) {
        return getCost(player.getInventory().getItemInMainHand());
    }

    /**
     * Gets the cost of repairing the given item
     *
     * @param item <p>The item to be repaired</p>
     * @return <p>The cost of the repair</p>
     */
    private static double getCost(@NotNull ItemStack item) {
        GlobalBlacksmithSettings globalBlacksmithSettings = BlacksmithPlugin.getInstance().getGlobalBlacksmithSettings();
        Material material = item.getType();

        //Calculate the base price
        double price = globalBlacksmithSettings.getBasePrice(material);

        // Adjust price based on durability
        double pricePerDurabilityPoint = globalBlacksmithSettings.getPricePerDurabilityPoint(material);
        if (globalBlacksmithSettings.getUseNaturalCost()) {
            //Cost increases with damage
            price += ((double) ItemHelper.getDamage(item)) * pricePerDurabilityPoint;
        } else {
            //Cost decreases with damage
            price += ((double) ItemHelper.getDurability(item)) * pricePerDurabilityPoint;
        }

        //Increase price for any enchantments
        price += getEnchantmentCost(item);

        //Override the cost for anvils
        if (ItemHelper.isAnvil(material, true)) {
            price = globalBlacksmithSettings.getAnvilCost(material);
        }
        return price;
    }

    /**
     * Gets the cost resulting from all enchantments on the given item
     *
     * @param item <p>The item to calculate enchantment cost for</p>
     * @return <p>The resulting enchantment cost</p>
     */
    private static double getEnchantmentCost(@NotNull ItemStack item) {
        GlobalBlacksmithSettings settings = BlacksmithPlugin.getInstance().getGlobalBlacksmithSettings();
        double price = 0;
        for (Enchantment enchantment : item.getEnchantments().keySet()) {
            price += settings.getEnchantmentCost(enchantment) * item.getEnchantmentLevel(enchantment);
        }
        return price;
    }

    /**
     * Gets the cost of scrapping an enchanted book
     *
     * @param item <p>The enchanted book to calculate cost for</p>
     * @return <p>The cost of scrapping the enchanted book</p>
     */
    private static double getEnchantedBookSalvageCost(@NotNull ItemStack item) {
        // TODO: Properly implement this
        /*GlobalScrapperSettings settings = BlacksmithPlugin.getInstance().getGlobalScrapperSettings();
        
        double cost = settings.getEnchantedBookSalvageCost();
        if (settings.multiplyEnchantedBookSalvageCost()) {
            cost *= SalvageHelper.getEnchantmentCount(item) - 1;
        }
        return SalvageHelper.getEnchantmentCount(item) * cost;*/
        return 1000000;
    }

    /**
     * Sets up Vault for economy
     *
     * @param servicesManager <p>The services manager to use for finding a Vault provider</p>
     * @return <p>True if Vault was successfully set up</p>
     */
    private static boolean setupVault(@NotNull ServicesManager servicesManager) {
        // Setup Vault
        RegisteredServiceProvider<Economy> economyProvider = servicesManager.getRegistration(Economy.class);
        if (economyProvider != null) {
            economy = economyProvider.getProvider();
            return true;
        } else {
            // Disable if no economy plugin was found
            BlacksmithPlugin.error("Failed to load an economy plugin. Disabling...");
            return false;
        }
    }

}