package net.knarcraft.blacksmith.manager;

import net.knarcraft.blacksmith.BlacksmithPlugin;
import net.knarcraft.blacksmith.config.blacksmith.GlobalBlacksmithSettings;
import net.knarcraft.blacksmith.util.ItemHelper;
import net.milkbowl.vault.economy.Economy;
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;

import java.util.logging.Level;
import java.util.logging.Logger;

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

    /**
     * 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>
     * @return <p>Whether the player cannot pay for the salvage</p>
     */
    public static boolean cannotPayForSalvage(@NotNull Player player) {
        return economy.getBalance(player) - BlacksmithPlugin.getInstance().getGlobalScrapperSettings().getCost() < 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
     *
     * @return <p>The formatted cost</p>
     */
    @NotNull
    public static String formatScrapperCost() {
        double cost = BlacksmithPlugin.getInstance().getGlobalScrapperSettings().getCost();
        return economy.format(cost);
    }

    /**
     * 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>
     */
    public static void withdrawScrapper(Player player) {
        double cost = BlacksmithPlugin.getInstance().getGlobalScrapperSettings().getCost();
        if (cost > 0) {
            economy.withdrawPlayer(player, cost);
        }
    }

    /**
     * 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;
    }

    /**
     * Sets up Vault for economy
     *
     * @param servicesManager <p>The services manager to use for finding a Vault provider</p>
     * @param logger          <p>The logger to use for logging</p>
     * @return <p>True if Vault was successfully set up</p>
     */
    private static boolean setupVault(@NotNull ServicesManager servicesManager, @NotNull Logger logger) {
        // 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
            logger.log(Level.SEVERE, "Failed to load an economy plugin. Disabling...");
            return false;
        }
    }

}