package com.gmail.nossr50.config;

import com.gmail.nossr50.datatypes.skills.SubSkillType;
import com.gmail.nossr50.datatypes.skills.subskills.AbstractSubSkill;
import com.gmail.nossr50.mcMMO;

import java.util.ArrayList;
import java.util.List;

public class RankConfig extends ConfigValidated {
    private static RankConfig instance;

    public RankConfig() {
        //super(McmmoCore.getDataFolderPath().getAbsoluteFile(),"skillranks.yml", true);
        super(mcMMO.p.getDataFolder().getAbsoluteFile(),"skillranks.yml", true);
        this.instance = this;
    }

    public static RankConfig getInstance() {
        if (instance == null)
            return new RankConfig();

        return instance;
    }

    @Override
    public void unload() {
        instance = null;
    }

    /**
     * The version of this config
     *
     * @return
     */
    @Override
    public double getConfigVersion() {
        return 1;
    }

    @Override
    public List<String> validateKeys() {
        List<String> reason = new ArrayList<String>();

        /*
         * In the future this method will check keys for all skills, but for now it only checks overhauled skills
         */
        checkKeys(reason);

        return reason;
    }

    /**
     * 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 int getSubSkillUnlockLevel(SubSkillType subSkillType, int rank) {
        String key = subSkillType.getRankConfigAddress();

        return findRankByRootAddress(rank, key);
    }

    /**
     * Returns the unlock level for a subskill depending on the gamemode
     *
     * @param abstractSubSkill target subskill
     * @param rank             the rank we are checking
     * @return the level requirement for a subskill at this particular rank
     */
    public int getSubSkillUnlockLevel(AbstractSubSkill abstractSubSkill, int rank) {
        String key = abstractSubSkill.getPrimaryKeyName() + "." + abstractSubSkill.getConfigKeyName();

        return findRankByRootAddress(rank, key);
    }

    /**
     * Returns the unlock level for a subskill depending on the gamemode
     *
     * @param key  root address of the subskill in the rankskills.yml file
     * @param rank the rank we are checking
     * @return the level requirement for a subskill at this particular rank
     */
    private int findRankByRootAddress(int rank, String key) {
        String scalingKey = MainMainConfig.getInstance().getIsRetroMode() ? ".RetroMode." : ".Standard.";

        String targetRank = "Rank_" + rank;

        key += scalingKey;
        key += targetRank;

        return getIntValue(key);
    }

    /**
     * Checks for valid keys for subskill ranks
     */
    private void checkKeys(List<String> reasons) {
        //For now we will only check ranks of stuff I've overhauled
        for (SubSkillType subSkillType : SubSkillType.values()) {
            //Keeping track of the rank requirements and making sure there are no logical errors
            int curRank = 0;
            int prevRank = 0;

            for (int x = 0; x < subSkillType.getNumRanks(); x++) {
                if (curRank > 0)
                    prevRank = curRank;

                curRank = getSubSkillUnlockLevel(subSkillType, x);

                //Do we really care if its below 0? Probably not
                if (curRank < 0) {
                    reasons.add(subSkillType.getAdvConfigAddress() + ".Rank_Levels.Rank_" + curRank + ".LevelReq should be above or equal to 0!");
                }

                if (prevRank > curRank) {
                    //We're going to allow this but we're going to warn them
                    plugin.getLogger().info("You have the ranks for the subskill " + subSkillType.toString() + " set up poorly, sequential ranks should have ascending requirements");
                }
            }
        }
    }
}