package com.gmail.nossr50.util.skills;

import com.gmail.nossr50.config.AdvancedConfig;
import com.gmail.nossr50.config.Config;
import com.gmail.nossr50.config.HiddenConfig;
import com.gmail.nossr50.datatypes.interactions.NotificationType;
import com.gmail.nossr50.datatypes.player.McMMOPlayer;
import com.gmail.nossr50.datatypes.skills.PrimarySkillType;
import com.gmail.nossr50.datatypes.skills.SubSkillType;
import com.gmail.nossr50.datatypes.skills.SuperAbilityType;
import com.gmail.nossr50.datatypes.skills.XPGainReason;
import com.gmail.nossr50.datatypes.skills.subskills.AbstractSubSkill;
import com.gmail.nossr50.datatypes.skills.subskills.interfaces.RandomChance;
import com.gmail.nossr50.events.skills.secondaryabilities.SubSkillEvent;
import com.gmail.nossr50.events.skills.secondaryabilities.SubSkillWeightedActivationCheckEvent;
import com.gmail.nossr50.locale.LocaleLoader;
import com.gmail.nossr50.mcMMO;
import com.gmail.nossr50.util.EventUtils;
import com.gmail.nossr50.util.ItemUtils;
import com.gmail.nossr50.util.Misc;
import com.gmail.nossr50.util.StringUtils;
import com.gmail.nossr50.util.player.NotificationManager;
import com.gmail.nossr50.util.player.UserManager;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.Recipe;
import org.bukkit.inventory.ShapedRecipe;
import org.bukkit.inventory.ShapelessRecipe;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

public class SkillUtils {

    public static final DecimalFormat percent = new DecimalFormat("##0.00%");
    public static final DecimalFormat decimal = new DecimalFormat("##0.00");

    public static void applyXpGain(McMMOPlayer mcMMOPlayer, PrimarySkillType skill, float xp, XPGainReason xpGainReason) {
        mcMMOPlayer.beginXpGain(skill, xp, xpGainReason);
    }

    /*
     * Skill Stat Calculations
     */

    public static String[] calculateAbilityDisplayValues(double chance, boolean isLucky) {
        String[] displayValues = new String[2];

        displayValues[0] = percent.format(Math.min(chance, 100.0D) / 100.0D);
        displayValues[1] = isLucky ? percent.format(Math.min(chance * 1.3333D, 100.0D) / 100.0D) : null;

        return displayValues;
    }

    public static String[] calculateAbilityDisplayValues(float skillValue, SubSkillType subSkillType, boolean isLucky) {
        int maxBonusLevel = AdvancedConfig.getInstance().getMaxBonusLevel(subSkillType);

        if(Config.getInstance().getIsRetroMode())
            maxBonusLevel = maxBonusLevel * 10;

        return calculateAbilityDisplayValues((AdvancedConfig.getInstance().getMaxChance(subSkillType) / maxBonusLevel) * Math.min(skillValue, maxBonusLevel), isLucky);
    }

    public static String[] calculateAbilityDisplayValuesCustom(float skillValue, SubSkillType subSkillType, boolean isLucky, int maxBonusLevel, double maxChance) {
        if(Config.getInstance().getIsRetroMode())
            maxBonusLevel = maxBonusLevel * 10;

        return calculateAbilityDisplayValues((maxChance / maxBonusLevel) * Math.min(skillValue, maxBonusLevel), isLucky);
    }

    public static String[] calculateLengthDisplayValues(Player player, float skillValue, PrimarySkillType skill) {
        int maxLength = skill.getAbility().getMaxLength();
        int abilityLengthVar = Config.getInstance().getIsRetroMode() ? AdvancedConfig.getInstance().getAbilityLengthRetro() : AdvancedConfig.getInstance().getAbilityLengthStandard();
        int length = 2 + (int) (skillValue / abilityLengthVar);
        int enduranceLength = PerksUtils.handleActivationPerks(player, length, maxLength);

        if (maxLength != 0) {
            length = Math.min(length, maxLength);
        }

        return new String[] { String.valueOf(length), String.valueOf(enduranceLength) };
    }

    /*
     * Others
     */

    public static int handleFoodSkills(Player player, int eventFoodLevel, SubSkillType subSkillType) {
        int curRank = RankUtils.getRank(player, subSkillType);

        int currentFoodLevel = player.getFoodLevel();
        int foodChange = eventFoodLevel - currentFoodLevel;

        foodChange+=curRank;

        return currentFoodLevel + foodChange;
    }

    /**
     * Calculate the time remaining until the cooldown expires.
     *
     * @param deactivatedTimeStamp Time of deactivation
     * @param cooldown The length of the cooldown
     * @param player The Player to check for cooldown perks
     *
     * @return the number of seconds remaining before the cooldown expires
     */
    public static int calculateTimeLeft(long deactivatedTimeStamp, int cooldown, Player player) {
        return (int) (((deactivatedTimeStamp + (PerksUtils.handleCooldownPerks(player, cooldown) * Misc.TIME_CONVERSION_FACTOR)) - System.currentTimeMillis()) / Misc.TIME_CONVERSION_FACTOR);
    }

    /**
     * Check if the cooldown has expired.
     * This does NOT account for cooldown perks!
     *
     * @param deactivatedTimeStamp Time of deactivation in seconds
     * @param cooldown The length of the cooldown in seconds
     *
     * @return true if the cooldown is expired
     */
    public static boolean cooldownExpired(long deactivatedTimeStamp, int cooldown) {
        return System.currentTimeMillis() >= (deactivatedTimeStamp + cooldown) * Misc.TIME_CONVERSION_FACTOR;
    }

    /**
     * Checks if the given string represents a valid skill
     *
     * @param skillName The name of the skill to check
     * @return true if this is a valid skill, false otherwise
     */
    public static boolean isSkill(String skillName) {
        return Config.getInstance().getLocale().equalsIgnoreCase("en_US") ? PrimarySkillType.getSkill(skillName) != null : isLocalizedSkill(skillName);
    }

    public static void sendSkillMessage(Player player, NotificationType notificationType, String key) {
        Location location = player.getLocation();

        for (Player otherPlayer : player.getWorld().getPlayers()) {
            if (otherPlayer != player && Misc.isNear(location, otherPlayer.getLocation(), Misc.SKILL_MESSAGE_MAX_SENDING_DISTANCE)) {
                NotificationManager.sendNearbyPlayersInformation(player, notificationType, key);
            }
        }
    }

    public static void handleAbilitySpeedIncrease(Player player) {
        if (HiddenConfig.getInstance().useEnchantmentBuffs()) {
            ItemStack heldItem = player.getInventory().getItemInMainHand();

            if (heldItem == null || heldItem.getType() == Material.AIR) {
                return;
            }

            int efficiencyLevel = heldItem.getEnchantmentLevel(Enchantment.DIG_SPEED);
            ItemMeta itemMeta = heldItem.getItemMeta();
            List<String> itemLore = new ArrayList<String>();

            if (itemMeta.hasLore()) {
                itemLore = itemMeta.getLore();
            }

            itemLore.add("mcMMO Ability Tool");
            itemMeta.addEnchant(Enchantment.DIG_SPEED, efficiencyLevel + AdvancedConfig.getInstance().getEnchantBuff(), true);

            itemMeta.setLore(itemLore);
            heldItem.setItemMeta(itemMeta);
        }
        else {
            int duration = 0;
            int amplifier = 0;

            if (player.hasPotionEffect(PotionEffectType.FAST_DIGGING)) {
                for (PotionEffect effect : player.getActivePotionEffects()) {
                    if (effect.getType() == PotionEffectType.FAST_DIGGING) {
                        duration = effect.getDuration();
                        amplifier = effect.getAmplifier();
                        break;
                    }
                }
            }

            McMMOPlayer mcMMOPlayer = UserManager.getPlayer(player);
            PrimarySkillType skill = mcMMOPlayer.getAbilityMode(SuperAbilityType.SUPER_BREAKER) ? PrimarySkillType.MINING : PrimarySkillType.EXCAVATION;
            int abilityLengthVar = Config.getInstance().getIsRetroMode() ? AdvancedConfig.getInstance().getAbilityLengthRetro() : AdvancedConfig.getInstance().getAbilityLengthStandard();
            int ticks = PerksUtils.handleActivationPerks(player, 2 + (mcMMOPlayer.getSkillLevel(skill) / abilityLengthVar), skill.getAbility().getMaxLength()) * Misc.TICK_CONVERSION_FACTOR;

            PotionEffect abilityBuff = new PotionEffect(PotionEffectType.FAST_DIGGING, duration + ticks, amplifier + 10);
            player.addPotionEffect(abilityBuff, true);
        }
    }

    public static void handleAbilitySpeedDecrease(Player player) {
        if (!HiddenConfig.getInstance().useEnchantmentBuffs()) {
            return;
        }

        for (ItemStack item : player.getInventory().getContents()) {
            removeAbilityBuff(item);
        }
    }

    public static void removeAbilityBuff(ItemStack item) {
        if (item == null || item.getType() == Material.AIR || (!ItemUtils.isPickaxe(item) && !ItemUtils.isShovel(item)) || !item.containsEnchantment(Enchantment.DIG_SPEED)) {
            return;
        }

        ItemMeta itemMeta = item.getItemMeta();

        if (itemMeta.hasLore()) {
            List<String> itemLore = itemMeta.getLore();

            if (itemLore.remove("mcMMO Ability Tool")) {
                int efficiencyLevel = item.getEnchantmentLevel(Enchantment.DIG_SPEED);

                if (efficiencyLevel <= AdvancedConfig.getInstance().getEnchantBuff()) {
                    itemMeta.removeEnchant(Enchantment.DIG_SPEED);
                }
                else {
                    itemMeta.addEnchant(Enchantment.DIG_SPEED, efficiencyLevel - AdvancedConfig.getInstance().getEnchantBuff(), true);
                }

                itemMeta.setLore(itemLore);
                item.setItemMeta(itemMeta);
            }
        }
    }

    public static void handleDurabilityChange(ItemStack itemStack, int durabilityModifier) {
        handleDurabilityChange(itemStack, durabilityModifier, 1.0);
    }

    /**
     * Modify the durability of an ItemStack.
     *
     * @param itemStack The ItemStack which durability should be modified
     * @param durabilityModifier the amount to modify the durability by
     * @param maxDamageModifier the amount to adjust the max damage by
     */
    public static void handleDurabilityChange(ItemStack itemStack, int durabilityModifier, double maxDamageModifier) {
        if (itemStack.hasItemMeta() && itemStack.getItemMeta().isUnbreakable()) {
            return;
        }

        Material type = itemStack.getType();
        short maxDurability = mcMMO.getRepairableManager().isRepairable(type) ? mcMMO.getRepairableManager().getRepairable(type).getMaximumDurability() : type.getMaxDurability();
        durabilityModifier = (int) Math.min(durabilityModifier / (itemStack.getEnchantmentLevel(Enchantment.DURABILITY) + 1), maxDurability * maxDamageModifier);

        itemStack.setDurability((short) Math.min(itemStack.getDurability() + durabilityModifier, maxDurability));
    }

    /**
     * Checks whether or not the given skill succeeds
     * @param subSkillType The ability corresponding to this check
     * @param player The player whose skill levels we are checking against
     * @param skillLevel The skill level of the corresponding skill
     * @param activationChance used to determine activation chance
     * @param maxChance maximum chance
     * @param maxLevel maximum skill level bonus
     * @return true if random chance succeeds and the event isn't cancelled
     */
    private static boolean performRandomSkillCheck(SubSkillType subSkillType, Player player, int skillLevel, int activationChance, double maxChance, int maxLevel) {
        if(Config.getInstance().getIsRetroMode())
            maxLevel = maxLevel * 10;

        double chance = (maxChance / maxLevel) * Math.min(skillLevel, maxLevel) / activationChance;
        return performRandomSkillCheckStatic(subSkillType, player, activationChance, chance);
    }

    /* NEW VERSION */
    private static boolean performRandomSkillCheck(AbstractSubSkill abstractSubSkill, Player player, int skillLevel, int activationChance, double maxChance, int maxLevel) {
        if(Config.getInstance().getIsRetroMode())
            maxLevel = maxLevel * 10;

        double chance = (maxChance / maxLevel) * Math.min(skillLevel, maxLevel) / activationChance;
        return performRandomSkillCheckStatic(abstractSubSkill, player, activationChance, chance);
    }

    /**
     * This method is the final step in determining if a Sub-Skill / Secondary Skill in mcMMO successfully activates either from chance or otherwise
     *
     * There are 4 types of Sub-Skill / Secondary Skill activations in mcMMO
     * 1) Random Chance with a linear increase to 100% (At 100 Skill Level)
     * 2) Random Chance with a linear increase to 100% at 100 Skill Level but caps out earlier in the curve (At x/100 Skill Level)
     * 3) Random Chance with a pre-determined activation roll and threshold roll
     * 4) Skills that are not chance based
     *
     * Random skills check for success based on numbers and then fire a cancellable event, if that event is not cancelled they succeed
     * All other skills just fire the cancellable event and succeed if it is not cancelled
     *
     * @param subSkillType The identifier for this specific sub-skill
     * @param player The owner of this sub-skill
     * @param skill The identifier for the parent of our sub-skill
     * @param activationChance This is the value that we roll against, 100 is normal, and 75 is for lucky perk
     * @param skillActivationType this value represents what kind of activation procedures this sub-skill uses
     * @return returns true if all conditions are met and they event is not cancelled
     */
    public static boolean isActivationSuccessful(SkillActivationType skillActivationType, SubSkillType subSkillType, Player player,
                                                 PrimarySkillType skill, int skillLevel, int activationChance)
    {
        //Maximum chance to succeed
        double maxChance = AdvancedConfig.getInstance().getMaxChance(subSkillType);
        //Maximum roll we can make
        int maxBonusLevel = AdvancedConfig.getInstance().getMaxBonusLevel(subSkillType);

        switch(skillActivationType)
        {
            //100 Skill = Guaranteed
            case RANDOM_LINEAR_100_SCALE_NO_CAP:
                return performRandomSkillCheck(subSkillType, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), 100.0D, 100);
            case RANDOM_LINEAR_100_SCALE_WITH_CAP:
                return performRandomSkillCheck(subSkillType, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), maxChance, maxBonusLevel);
            case RANDOM_STATIC_CHANCE:
                //Grab the static activation chance of this skill
                double staticRoll = getSecondaryAbilityStaticChance(subSkillType) / activationChance;
                return performRandomSkillCheckStatic(subSkillType, player, activationChance, staticRoll);
            case ALWAYS_FIRES:
                SubSkillEvent event = EventUtils.callSubSkillEvent(player, subSkillType);
                return !event.isCancelled();
                default:
                    return false;
        }
    }

    /**
     * This method is for running a random success check with custom maxChance and maxBonusLevel values
     * Mostly used for RNG effects that can't be directly associated with a specific AbstractSubSkill
     * @param player target player
     * @param abstractSubSkill this abstract subskill
     * @param maxChance custom max chance
     * @param maxBonusLevel custom max bonus level
     * @return true if activation was successful
     */
    public static boolean isActivationSuccessfulCustom(Player player, AbstractSubSkill abstractSubSkill, double maxChance, int maxBonusLevel)
    {
        int skillLevel = UserManager.getPlayer(player).getSkillLevel(abstractSubSkill.getPrimarySkill());

        return performRandomSkillCheck(abstractSubSkill, player, skillLevel, PerksUtils.handleLuckyPerks(player, abstractSubSkill.getPrimarySkill()), maxChance, maxBonusLevel);
    }

    public static double getChanceOfSuccess(int skillLevel, double maxLevelBonus, double curve)
    {
        return getChanceOfSuccess((double) skillLevel, maxLevelBonus, curve);
    }

    public static double getChanceOfSuccess(double skillLevel, double maxLevelBonus, double curve)
    {
        if(skillLevel > maxLevelBonus)
            return maxLevelBonus / curve;

       return skillLevel / curve;
    }

    /* NEW VERSION */
    public static boolean isActivationSuccessful(SkillActivationType skillActivationType, AbstractSubSkill abstractSubSkill, Player player, double maxChance, int maxBonusLevel)
    {
        int skillLevel = UserManager.getPlayer(player).getSkillLevel(abstractSubSkill.getPrimarySkill());
        PrimarySkillType skill = abstractSubSkill.getPrimarySkill();

        switch(skillActivationType)
        {
            //100 Skill = Guaranteed
            case RANDOM_LINEAR_100_SCALE_NO_CAP:
                return performRandomSkillCheck(abstractSubSkill, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), 100.0D, 100);
            case RANDOM_LINEAR_100_SCALE_WITH_CAP:
                return performRandomSkillCheck(abstractSubSkill, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), maxChance, maxBonusLevel);
            case RANDOM_STATIC_CHANCE:
                //TODO: Add this in for the new system
                //Grab the static activation chance of this skill
                //double staticRoll = getSecondaryAbilityStaticChance(subSkillType) / activationChance;
                //return performRandomSkillCheckStatic(subSkillType, player, activationChance, staticRoll);
                return false;
            case ALWAYS_FIRES:
                SubSkillEvent event = EventUtils.callSubSkillEvent(player, abstractSubSkill);
                return !event.isCancelled();
            default:
                return false;
        }
    }

    public static boolean isActivationSuccessful(SkillActivationType skillActivationType, AbstractSubSkill abstractSubSkill, Player player)
    {
        //Maximum chance to succeed
        RandomChance randomChance = (RandomChance) abstractSubSkill;
        double maxChance = randomChance.getRandomChanceMaxChance();

        //Maximum roll we can make
        int maxBonusLevel = randomChance.getRandomChanceMaxBonus();
        int skillLevel = UserManager.getPlayer(player).getSkillLevel(abstractSubSkill.getPrimarySkill());
        PrimarySkillType skill = abstractSubSkill.getPrimarySkill();

        switch(skillActivationType)
        {
            //100 Skill = Guaranteed
            case RANDOM_LINEAR_100_SCALE_NO_CAP:
                return performRandomSkillCheck(abstractSubSkill, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), 100.0D, 100);
            case RANDOM_LINEAR_100_SCALE_WITH_CAP:
                return performRandomSkillCheck(abstractSubSkill, player, skillLevel, PerksUtils.handleLuckyPerks(player, skill), maxChance, maxBonusLevel);
            case RANDOM_STATIC_CHANCE:
                //TODO: Add this in for the new system
                //Grab the static activation chance of this skill
                //double staticRoll = getSecondaryAbilityStaticChance(subSkillType) / activationChance;
                //return performRandomSkillCheckStatic(subSkillType, player, activationChance, staticRoll);
                return false;
            case ALWAYS_FIRES:
                SubSkillEvent event = EventUtils.callSubSkillEvent(player, abstractSubSkill);
                return !event.isCancelled();
            default:
                return false;
        }
    }

    /**
     * Grabs static activation rolls for Secondary Abilities
     * @param subSkillType The secondary ability to grab properties of
     * @return The static activation roll involved in the RNG calculation
     */
    public static double getSecondaryAbilityStaticChance(SubSkillType subSkillType)
    {
        switch(subSkillType)
        {
            case AXES_ARMOR_IMPACT:
                return AdvancedConfig.getInstance().getImpactChance();
            case AXES_GREATER_IMPACT:
                return AdvancedConfig.getInstance().getGreaterImpactChance();
            case TAMING_FAST_FOOD_SERVICE:
                return AdvancedConfig.getInstance().getFastFoodChance();
                default:
                    return 100.0D;
        }
    }

    /**
     * Used to determine whether or not a sub-skill activates from random chance (using static values)
     * @param subSkillType The identifier for this specific sub-skill
     * @param player The owner of this sub-skill
     * @param activationChance This is the value that we roll against, 100 is normal, and 75 is for lucky perk
     * @param chance This is the static modifier for our random calculations
     * @return true if random chance was successful and the event wasn't cancelled
     */
    private static boolean performRandomSkillCheckStatic(SubSkillType subSkillType, Player player, int activationChance, double chance) {
        SubSkillWeightedActivationCheckEvent event = new SubSkillWeightedActivationCheckEvent(player, subSkillType, chance);
        mcMMO.p.getServer().getPluginManager().callEvent(event);
        return (event.getChance() * activationChance) > Misc.getRandom().nextInt(activationChance) && !event.isCancelled();
    }

    /* NEW VERSION */
    private static boolean performRandomSkillCheckStatic(AbstractSubSkill abstractSubSkill, Player player, int activationChance, double chance) {
        SubSkillWeightedActivationCheckEvent event = new SubSkillWeightedActivationCheckEvent(player, abstractSubSkill, chance);
        mcMMO.p.getServer().getPluginManager().callEvent(event);
        return (event.getChance() * activationChance) > Misc.getRandom().nextInt(activationChance) && !event.isCancelled();
    }

    public static boolean treasureDropSuccessful(Player player, double dropChance, int activationChance) {
        SubSkillWeightedActivationCheckEvent event = new SubSkillWeightedActivationCheckEvent(player, SubSkillType.EXCAVATION_TREASURE_HUNTER, dropChance / activationChance);
        mcMMO.p.getServer().getPluginManager().callEvent(event);
        return (event.getChance() * activationChance) > (Misc.getRandom().nextDouble() * activationChance) && !event.isCancelled();
    }

    private static boolean isLocalizedSkill(String skillName) {
        for (PrimarySkillType skill : PrimarySkillType.values()) {
            if (skillName.equalsIgnoreCase(LocaleLoader.getString(StringUtils.getCapitalized(skill.toString()) + ".SkillName"))) {
                return true;
            }
        }

        return false;
    }

    protected static Material getRepairAndSalvageItem(ItemStack inHand) {
        if (ItemUtils.isDiamondTool(inHand) || ItemUtils.isDiamondArmor(inHand)) {
            return Material.DIAMOND;
        }
        else if (ItemUtils.isGoldTool(inHand) || ItemUtils.isGoldArmor(inHand)) {
            return Material.GOLD_INGOT;
        }
        else if (ItemUtils.isIronTool(inHand) || ItemUtils.isIronArmor(inHand)) {
            return Material.IRON_INGOT;
        }
        else if (ItemUtils.isStoneTool(inHand)) {
            return Material.COBBLESTONE;
        }
        else if (ItemUtils.isWoodTool(inHand)) {
            return Material.OAK_WOOD;
        }
        else if (ItemUtils.isLeatherArmor(inHand)) {
            return Material.LEATHER;
        }
        else if (ItemUtils.isStringTool(inHand)) {
            return Material.STRING;
        }
        else {
            return null;
        }
    }

    public static int getRepairAndSalvageQuantities(ItemStack item) {
        return getRepairAndSalvageQuantities(item, getRepairAndSalvageItem(item), (byte) -1);
    }

    public static int getRepairAndSalvageQuantities(ItemStack item, Material repairMaterial, byte repairMetadata) {
        // Workaround for Bukkit bug where damaged items would not return any recipes
        item = item.clone();
        item.setDurability((short) 0);

        int quantity = 0;
        List<Recipe> recipes = mcMMO.p.getServer().getRecipesFor(item);

        if (recipes.isEmpty()) {
            return quantity;
        }

        Recipe recipe = recipes.get(0);

        if (recipe instanceof ShapelessRecipe) {
            for (ItemStack ingredient : ((ShapelessRecipe) recipe).getIngredientList()) {
                if (ingredient != null && (repairMaterial == null || ingredient.getType() == repairMaterial) && (repairMetadata == -1 || ingredient.getType().equals(repairMaterial))) {
                    quantity += ingredient.getAmount();
                }
            }
        }
        else if (recipe instanceof ShapedRecipe) {
            for (ItemStack ingredient : ((ShapedRecipe) recipe).getIngredientMap().values()) {
                if (ingredient != null && (repairMaterial == null || ingredient.getType() == repairMaterial) && (repairMetadata == -1 || ingredient.getType().equals(repairMaterial))) {
                    quantity += ingredient.getAmount();
                }
            }
        }

        return quantity;
    }
}