package de.anura.core;

import java.sql.ResultSet;
import java.sql.SQLException;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.UUID;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerKickEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.permissions.PermissionAttachment;

public final class Permissions implements Listener {
    
        private final HashMap<Integer, String> groupNames = new HashMap<>();
        private final HashMap<Integer, ArrayList<String>> groupPerms = new HashMap<>();
        private final HashMap<UUID, ArrayList<Integer>> playerGroups = new HashMap<>();
        private final HashMap<Integer, Integer> groupParents = new HashMap<>();
        private final HashMap<Integer, String> groupPrefix = new HashMap<>();
        private final HashMap<Integer, String> groupSuffix = new HashMap<>();
        private final HashMap<Integer, String> groupListColor = new HashMap<>();
        private final HashMap<Player, PermissionAttachment> permAttachments = new HashMap<>();
        
        private int groupAutoIncrement = 0;
        private final AnuraCore plugin;
        
        public Permissions(AnuraCore plugin)
	{
            plugin.getServer().getPluginManager().registerEvents(this,  plugin);
            this.reload();
            this.plugin = plugin;
            this.createPermAttachs();
            this.updateAllPlayers();
	}
        
        //Event handlers
        @EventHandler
        public void playerJoin(PlayerJoinEvent event)
        {
            Player P = event.getPlayer();
            this.permAttachments.put(P, P.addAttachment(this.plugin));
            this.updatePlayer(P);
        }
        
        @EventHandler
        public void playerKick(PlayerKickEvent event)
        {
            Player P = event.getPlayer();
            if(this.permAttachments.get(P) == null) return;
            P.removeAttachment(this.permAttachments.get(P));
            this.permAttachments.remove(P);
        }
        
        @EventHandler
        public void playerQuit(PlayerQuitEvent event)
        {
            Player P = event.getPlayer();
            if(this.permAttachments.get(P) == null) return;
            P.removeAttachment(this.permAttachments.get(P));
            this.permAttachments.remove(P);
        }
        
        //The permission stuff
        private void createPermAttachs()
        {
            for(Player P : Bukkit.getOnlinePlayers())
            {
                this.permAttachments.put(P, P.addAttachment(this.plugin));
            }
        }
        public void updateAllPlayers()
        {
            for(Player P : Bukkit.getOnlinePlayers())
            {
                this.updatePlayer(P);
            }
        }
        public void updatePlayer(Player P)
        {
            PermissionAttachment pa = this.permAttachments.get(P);
            for(String p : pa.getPermissions().keySet())
            {
                pa.unsetPermission(p);
            }
            if(!this.playerGroups.containsKey(P.getUniqueId()))
            {
                this.playerGroups.put(P.getUniqueId(), new ArrayList<Integer>());
            }
            ArrayList<Integer> groups = this.playerGroups.get(P.getUniqueId());
            ArrayList<Integer> assignedGroups = new ArrayList<>();
            String prefixes = "";
            String suffixes = "";
            String listColor = "";
            for(Integer g : groups)
            {
                if(assignedGroups.contains(g)) continue;
                assignedGroups.add(g);
                for(String perm : this.groupPerms.get(g))
                {
                    pa.setPermission(perm, true);
                }
                ArrayList<String> perms = this.getParentPerms(g, assignedGroups);
                for(String perm : perms)
                {
                    pa.setPermission(perm, true);
                }
                if(this.groupPrefix.containsKey(g)) prefixes += this.groupPrefix.get(g);
                if(this.groupSuffix.containsKey(g)) suffixes += this.groupSuffix.get(g);
                if(this.groupListColor.containsKey(g)) listColor = this.groupListColor.get(g);
            }
            String name = prefixes + P.getName() + suffixes;
            P.setDisplayName(name);
            P.setPlayerListName(listColor + P.getName());
        }
        private ArrayList<String> getParentPerms(Integer group, ArrayList<Integer> assigned)
        {
            ArrayList<String> toReturn = new ArrayList<>();
            if(this.groupParents.get(group) == -1)
            {
                return toReturn;
            }
            if(assigned.contains(this.groupParents.get(group)))
            {
                return toReturn;
            }
            for(String perm : this.groupPerms.get(this.groupParents.get(group)))
            {
                toReturn.add(perm);
            }
            for(String perm : this.getParentPerms(this.groupParents.get(group), assigned))
            {
                toReturn.add(perm);
            }
            return toReturn;
        }
        public String reload()
        {       
            ResultSet groupsRs = AnuraCore.sql.querySelect("SELECT prefix, suffix, parent, name, id, listColor FROM permGroups");
            ResultSet permsRs = AnuraCore.sql.querySelect("SELECT `group`, name FROM permPerms");
            ResultSet userRs = AnuraCore.sql.querySelect("SELECT playerUUID, `group` FROM permPlayerGroups");
            this.groupNames.clear();
            this.groupPerms.clear();
            this.playerGroups.clear();
            this.groupParents.clear();
            this.groupPrefix.clear();
            this.groupSuffix.clear();
            HashMap<Integer, Integer> groupIds = new HashMap<>();
            this.groupAutoIncrement = 0;
            try {
                groupsRs.last();
                if(groupsRs.getRow() != 0)
                {
                    groupsRs.beforeFirst();
                    while(groupsRs.next())
                    {
                        int id = this.groupAutoIncrement;
                        this.groupNames.put(id, groupsRs.getString("name"));
                        this.groupPerms.put(id, new ArrayList<String>());
                        this.groupParents.put(id, groupsRs.getInt("parent"));
                        if(groupsRs.getString("prefix") != null) this.groupPrefix.put(id, groupsRs.getString("prefix"));
                        if(groupsRs.getString("suffix") != null) this.groupSuffix.put(id, groupsRs.getString("suffix"));
                        if(groupsRs.getString("listColor") != null) this.groupListColor.put(id, groupsRs.getString("listColor"));
                        groupIds.put(groupsRs.getInt("id"), id);
                        this.groupAutoIncrement++;
                    }
                }
                permsRs.last();
                if(permsRs.getRow() != 0)
                {
                    permsRs.beforeFirst();
                    while(permsRs.next())
                    {
                        int groupId = groupIds.get(permsRs.getInt("group"));
                        if(this.groupNames.containsKey(groupId))
                        {
                            
                            this.groupPerms.get(groupId).add(permsRs.getString("name"));
                        }
                    }
                }
                userRs.last();
                if(userRs.getRow() != 0)
                {
                    userRs.beforeFirst();
                    while(userRs.next())
                    {
                        int groupId = groupIds.get(userRs.getInt("group"));
                        if(this.groupNames.containsKey(groupId))
                        {
                            ArrayList<Integer> groupList = this.playerGroups.get(UUID.fromString(userRs.getString("playerUUID")));
                            if(groupList == null)
                            {
                                groupList = new ArrayList<>();
                            }
                            groupList.add(groupId);
                            this.playerGroups.put(UUID.fromString(userRs.getString("playerUUID")), groupList);
                        }
                    }
                    
                }
            } catch (SQLException ex) {
                System.err.println("Was not able to load permissions. Sorry. ("+ex.getLocalizedMessage()+")");
            } 
            return ChatColor.GREEN + "Permissions reloaded!";
        }
        
    
}