package com.gmail.nossr50.util.skills;

import com.gmail.nossr50.api.exceptions.MissingSkillPropertyDefinition;
import com.gmail.nossr50.config.hocon.skills.ranks.SkillRankProperty;
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.subskills.AbstractSubSkill;
import com.gmail.nossr50.listeners.InteractionManager;
import com.gmail.nossr50.runnables.skills.SkillUnlockNotificationTask;
import com.gmail.nossr50.util.Permissions;
import com.google.common.reflect.TypeToken;
import ninja.leaping.configurate.commented.CommentedConfigurationNode;
import ninja.leaping.configurate.objectmapping.ObjectMappingException;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;

import java.util.HashMap;

public class RankUtils {
    private static HashMap<String, HashMap<Integer, Integer>> subSkillRanks;
    private static int count = 0;

    /**
     * @param plugin           plugin instance ref
     * @param mcMMOPlayer      target player
     * @param primarySkillType target primary skill
     * @param newLevel         the new level of this skill
     */
    public static void executeSkillUnlockNotifications(Plugin plugin, McMMOPlayer mcMMOPlayer, PrimarySkillType primarySkillType, int newLevel) {
        for (SubSkillType subSkillType : primarySkillType.getSkillAbilities()) {
            int playerRankInSkill = getRank(mcMMOPlayer.getPlayer(), subSkillType);

            HashMap<Integer, Integer> innerMap = subSkillRanks.get(subSkillType.toString());

            //If the skill doesn't have registered ranks gtfo
            if (innerMap == null || innerMap.get(playerRankInSkill) == null)
                continue;

            //Don't send notifications if the player lacks the permission node
            if(!Permissions.isSubSkillEnabled(mcMMOPlayer.getPlayer(), subSkillType))
                continue;

            //The players level is the exact level requirement for this skill
            if (newLevel == innerMap.get(playerRankInSkill)) {
                SkillUnlockNotificationTask skillUnlockNotificationTask = new SkillUnlockNotificationTask(mcMMOPlayer, subSkillType);

                skillUnlockNotificationTask.runTaskLater(plugin, (count * 100));

                count++;
            }
        }
    }

    public static void resetUnlockDelayTimer() {
        count = 0;
    }

    /* NEW SYSTEM */
    private static void addRanks(AbstractSubSkill abstractSubSkill) {
        //Fill out the rank array
        for (int i = 0; i < abstractSubSkill.getNumRanks(); i++) {
            //This adds the highest ranks first
            addRank(abstractSubSkill, abstractSubSkill.getNumRanks() - i);

            //TODO: Remove debug code
            /*System.out.println("DEBUG: Adding rank "+(numRanks-i)+" to "+subSkillType.toString());*/
        }
    }

    private static void addRanks(SubSkillType subSkillType) {
        //Fill out the rank array
        for (int i = 0; i < subSkillType.getNumRanks(); i++) {
            //This adds the highest ranks first
            addRank(subSkillType, subSkillType.getNumRanks() - i);

            //TODO: Remove debug code
            /*System.out.println("DEBUG: Adding rank "+(numRanks-i)+" to "+subSkillType.toString());*/
        }
    }

    /**
     * Populates the ranks for every skill we know about
     */
    public static void populateRanks() {
        for (SubSkillType subSkillType : SubSkillType.values()) {
            addRanks(subSkillType);
        }

        for (AbstractSubSkill abstractSubSkill : InteractionManager.getSubSkillList()) {
            addRanks(abstractSubSkill);
        }
    }

    /**
     * Returns whether or not the player has unlocked the first rank in target subskill
     *
     * @param player       the player
     * @param subSkillType the target subskill
     * @return true if the player has at least one rank in the skill
     */
    public static boolean hasUnlockedSubskill(Player player, SubSkillType subSkillType) {
        int curRank = getRank(player, subSkillType);

        //-1 means the skill has no unlockable levels and is therefor unlocked
        return curRank == -1 || curRank >= 1;
    }

    /**
     * Returns whether or not the player has unlocked the first rank in target subskill
     *
     * @param player           the player
     * @param abstractSubSkill the target subskill
     * @return true if the player has at least one rank in the skill
     */
    public static boolean hasUnlockedSubskill(Player player, AbstractSubSkill abstractSubSkill) {
        int curRank = getRank(player, abstractSubSkill);

        //-1 means the skill has no unlockable levels and is therefor unlocked
        return curRank == -1 || curRank >= 1;
    }

    /**
     * Returns whether or not the player has reached the specified rank in target subskill
     *
     * @param rank         the target rank
     * @param player       the player
     * @param subSkillType the target subskill
     * @return true if the player is at least that rank in this subskill
     */
    public static boolean hasReachedRank(int rank, Player player, SubSkillType subSkillType) {
        return getRank(player, subSkillType) >= rank;
    }

    /**
     * Returns whether or not the player has reached the specified rank in target subskill
     *
     * @param rank             the target rank
     * @param player           the player
     * @param abstractSubSkill the target subskill
     * @return true if the player is at least that rank in this subskill
     */
    public static boolean hasReachedRank(int rank, Player player, AbstractSubSkill abstractSubSkill) {
        return getRank(player, abstractSubSkill) >= rank;
    }

    /**
     * Gets the current rank of the subskill for the player
     *
     * @param player       The player in question
     * @param subSkillType Target subskill
     * @return The rank the player currently has achieved in this skill. -1 for skills without ranks.
     */
    public static int getRank(Player player, SubSkillType subSkillType) {
        String skillName = subSkillType.toString();
        int numRanks = subSkillType.getNumRanks();

        if (subSkillRanks == null)
            subSkillRanks = new HashMap<>();

        if (numRanks == 0)
            return -1; //-1 Means the skill doesn't have ranks

        if (subSkillRanks.get(skillName) == null && numRanks > 0)
            addRanks(subSkillType);

        //Get our rank map
        HashMap<Integer, Integer> rankMap = subSkillRanks.get(skillName);

        if (pluginRef.getUserManager().getPlayer(player) == null)
            return 0;

        //Skill level of parent skill
        int currentSkillLevel = pluginRef.getUserManager().getPlayer(player).getSkillLevel(subSkillType.getParentSkill());

        for (int i = 0; i < numRanks; i++) {
            //Compare against the highest to lowest rank in that order
            int rank = numRanks - i;
            int unlockLevel = getRankUnlockLevel(subSkillType, rank);

            //If we check all ranks and still cannot unlock the skill, we return rank 0
            if (rank == 0)
                return 0;

            //True if our skill level can unlock the current rank
            if (currentSkillLevel >= unlockLevel)
                return rank;
        }

        return 0; //We should never reach this
    }

    /**
     * Gets the current rank of the subskill for the player
     *
     * @param player           The player in question
     * @param abstractSubSkill Target subskill
     * @return The rank the player currently has achieved in this skill. -1 for skills without ranks.
     */
    public static int getRank(Player player, AbstractSubSkill abstractSubSkill) {
        String skillName = abstractSubSkill.getConfigKeyName();
        int numRanks = abstractSubSkill.getNumRanks();

        if (subSkillRanks == null)
            subSkillRanks = new HashMap<>();

        if (numRanks == 0)
            return -1; //-1 Means the skill doesn't have ranks

        if (subSkillRanks.get(skillName) == null && numRanks > 0)
            addRanks(abstractSubSkill);

        //Get our rank map
        HashMap<Integer, Integer> rankMap = subSkillRanks.get(skillName);

        if (pluginRef.getUserManager().getPlayer(player) == null)
            return 0;

        //Skill level of parent skill
        int currentSkillLevel = pluginRef.getUserManager().getPlayer(player).getSkillLevel(abstractSubSkill.getPrimarySkill());

        for (int i = 0; i < numRanks; i++) {
            //Compare against the highest to lowest rank in that order
            int rank = numRanks - i;
            int unlockLevel = getRankUnlockLevel(abstractSubSkill, rank);

            //If we check all ranks and still cannot unlock the skill, we return rank 0
            if (rank == 0)
                return 0;

            //True if our skill level can unlock the current rank
            if (currentSkillLevel >= unlockLevel)
                return rank;
        }

        return 0; //We should never reach this
    }

    /**
     * Adds ranks to our map
     *
     * @param abstractSubSkill The subskill to add ranks for
     * @param rank             The rank to add
     */
    private static void addRank(AbstractSubSkill abstractSubSkill, int rank) {
        initMaps(abstractSubSkill.getConfigKeyName());

        HashMap<Integer, Integer> rankMap = subSkillRanks.get(abstractSubSkill.getConfigKeyName());

        rankMap.put(rank, getRankUnlockLevel(abstractSubSkill, rank));
    }

    @Deprecated
    private static void addRank(SubSkillType subSkillType, int rank) {
        initMaps(subSkillType.toString());

        HashMap<Integer, Integer> rankMap = subSkillRanks.get(subSkillType.toString());

        rankMap.put(rank, getRankUnlockLevel(subSkillType, rank));
    }

    private static void initMaps(String s) {
        if (subSkillRanks == null)
            subSkillRanks = new HashMap<>();

        subSkillRanks.computeIfAbsent(s, k -> new HashMap<>());
    }

/*    public static int getSubSkillUnlockRequirement(SubSkillType subSkillType)
    {
        String skillName = subSkillType.toString();
        int numRanks = subSkillType.getNumRanks();

        if(subSkillRanks == null)
            subSkillRanks = new HashMap<>();

        if(numRanks == 0)
            return -1; //-1 Means the skill doesn't have ranks

        if(subSkillRanks.get(skillName) == null && numRanks > 0)
            addRanks(subSkillType);

        return subSkillRanks.get(subSkillType.toString()).get(1);
    }*/

    /**
     * Gets the unlock level for a specific rank in a subskill
     *
     * @param subSkillType The target subskill
     * @param rank         The target rank
     * @return The level at which this rank unlocks
     */
    @Deprecated
    public static int getRankUnlockLevel(SubSkillType subSkillType, int rank) {
        return getSubSkillUnlockLevel(subSkillType, rank);
    }

    public static int getRankUnlockLevel(AbstractSubSkill abstractSubSkill, int rank) {
        return getSubSkillUnlockLevel(abstractSubSkill, rank);
    }

    /**
     * Get the level at which a skill is unlocked for a player (this is the first rank of a skill)
     *
     * @param subSkillType target subskill
     * @return The unlock requirements for rank 1 in this skill
     */
    public static int getUnlockLevel(SubSkillType subSkillType) {
        return getSubSkillUnlockLevel(subSkillType, 1);
    }

    /**
     * Get the level at which a skill is unlocked for a player (this is the first rank of a skill)
     *
     * @param abstractSubSkill target subskill
     * @return The unlock requirements for rank 1 in this skill
     */
    public static int getUnlockLevel(AbstractSubSkill abstractSubSkill) {
        return getSubSkillUnlockLevel(abstractSubSkill, 1);
    }

    /**
     * Get the highest rank of a subskill
     *
     * @param subSkillType target subskill
     * @return the last rank of a subskill
     */
    public static int getHighestRank(SubSkillType subSkillType) {
        return subSkillType.getNumRanks();
    }

    public static String getHighestRankStr(SubSkillType subSkillType) {
        return String.valueOf(subSkillType.getNumRanks());
    }

    /**
     * Get the highest rank of a subskill
     *
     * @param abstractSubSkill target subskill
     * @return the last rank of a subskill
     */
    public static int getHighestRank(AbstractSubSkill abstractSubSkill) {
        return abstractSubSkill.getNumRanks();
    }

    public static int getSuperAbilityUnlockRequirement(SuperAbilityType superAbilityType) {
        return getRankUnlockLevel(superAbilityType.getSubSkillTypeDefinition(), 1);
    }

    /**
     * Returns the unlock level for a subskill depending on the gamemode
     *
     * @param subSkillType target subskill
     * @param rank         the rank we are checking
     * @return the level requirement for a subskill at this particular rank
     */
    public static int getSubSkillUnlockLevel(SubSkillType subSkillType, int rank) {
        return findRankByRootAddress(rank, subSkillType);
    }

    /**
     * Returns the unlock level for a subskill depending on the level scaling
     *
     * @param abstractSubSkill target subskill
     * @param rank             the rank we are checking
     * @return the level requirement for a subskill at this particular rank
     */
    public static int getSubSkillUnlockLevel(AbstractSubSkill abstractSubSkill, int rank) {
        return findRankByRootAddress(rank, abstractSubSkill.getSubSkillType());
    }

    /**
     * Returns the unlock level for a subskill depending on the level scaling
     *
     * @param subSkillType target sub-skill
     * @param rank the rank we are checking
     * @return the level requirement for a subskill at this particular rank
     */
    private static int findRankByRootAddress(int rank, SubSkillType subSkillType) {

        CommentedConfigurationNode rankConfigRoot = pluginRef.getConfigManager().getConfigRanksRootNode();

        try {
            SkillRankProperty skillRankProperty
                    = (SkillRankProperty) rankConfigRoot.getNode(subSkillType.getParentSkill().getCapitalizedPrimarySkillName())
                    .getNode(subSkillType.getHoconFriendlyConfigName())
                    .getValue(TypeToken.of(SkillRankProperty.class));

            int unlockLevel = skillRankProperty.getUnlockLevel(pluginRef.isRetroModeEnabled(), rank);
            return unlockLevel;

        } catch (ObjectMappingException | MissingSkillPropertyDefinition | NullPointerException e) {
            pluginRef.getLogger().severe("Error traversing nodes to SkillRankProperty for "+subSkillType.toString());
            pluginRef.getLogger().severe("This indicates a problem with your rank config file, edit the file and correct the issue or delete it to generate a new default one with correct values.");
            e.printStackTrace();
        }

        //Default to the max level for the skill if any errors were encountered incorrect
        return pluginRef.getConfigManager().getConfigLeveling().getSkillLevelCap(subSkillType.getParentSkill());
    }

    public static boolean isPlayerMaxRankInSubSkill(Player player, SubSkillType subSkillType) {
        int playerRank = getRank(player, subSkillType);
        int highestRank = getHighestRank(subSkillType);

        return playerRank == highestRank;
    }
}