package me.km.snuviscript;

import me.km.KajetansMod;
import me.km.api.Module;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.UUID;
import net.minecraft.command.ICommandSender;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.text.TextFormatting;

public class ScriptAPI extends Module
{
    private final SnuviParser qparser;
    
    private int idCounter;
    
    private final HashMap<Integer, Script> questData;
    private final HashMap<UUID, Integer> playerQuestID;
    
    private final HashMap<Integer, Script> scripts;
    
    private final HashSet<String> scriptCommands;
    
    public ScriptAPI(String mname, String prefix, TextFormatting color) 
    {
        super(mname, prefix, color);
        
        questData = new HashMap<>();
        playerQuestID = new HashMap<>();
        scripts = new HashMap<>();
        idCounter = 0;
        qparser = new SnuviParser();
        scriptCommands = new HashSet<>();
    }
       
    // -------------------------------------------------------------------------
    // QuestParser
    // -------------------------------------------------------------------------
    
    public SnuviParser getQuestParser()
    {
        return qparser;
    }
    
    // -------------------------------------------------------------------------
    // custom commands
    // -------------------------------------------------------------------------
    
    public boolean isRegisteredScriptCommand(String s)
    {
        return scriptCommands.contains(s);
    }
    
    public void registerScriptCommand(String s)
    {
        scriptCommands.add(s);
    }
    
    public void unregisterScriptCommand(String s)
    {
        scriptCommands.remove(s);
    }
    
    public void clearScriptCommands()
    {
        scriptCommands.clear();
    }
    
    // -------------------------------------------------------------------------
    // Quest - Control
    // -------------------------------------------------------------------------

    private void addPlayerToQuest(EntityPlayer p, EntityPlayer p2, Script qd)
    {             
        if(hasQuest(p))
        {
            this.send(p, "Du hast bereits eine Quest.");;
            return;
        }       
        if(qd == null)
        {
            if(p2 != null)
            {
                this.send(p, p2.getName() + " hat keine aktive Quest.");
            }
            return;
        }
        if(qd.getBoolean("no-join"))
        {
            this.send(p, "Du darfst dieser Quest nicht beitreten.");
            return;
        }
        playerQuestID.put(p.getUniqueID(), qd.getId());
        qd.addPlayer(p);
        if(!qd.getBoolean("no-quest-msg"))
        {
            qparser.sendMessageWithSuffix(qd, p.getName() + " ist deiner Quest beigetreten.");
            if(p2 != null)
            {
                this.send(p, "Du bist nun in der Quest von " + p2.getName() + ".");
            }
            else
            {
                this.send(p, "Du bist einer bereits laufenden Quest beigetreten.");
            }
        }
        qd.setVar("event", "player-join");
        ScriptVars.setPlayerVars(qd, p); 
        qd.runCode();
    } 
    
    public void addPlayerToPlayer(EntityPlayer p, EntityPlayer p2)
    {             
        addPlayerToQuest(p, p2, getQuestData(p2)); 
    } 
    
    public void addPlayerToQuest(EntityPlayer p, Script qd)
    {             
        addPlayerToQuest(p, null, qd);  
    } 
    
    public Collection<Script> getQuests()
    {
        return questData.values();
    }
    
    public boolean hasQuest(EntityPlayer p)
    {
        return playerQuestID.containsKey(p.getUniqueID());
    }
    
    public Script getQuestData(EntityPlayer p)
    {
        Integer id = playerQuestID.get(p.getUniqueID());
        if(id == null)
        {
            return null;
        }
        Script qd = questData.get(id);
        if(qd == null)
        {
            qparser.sendWarningToAllDevs("Die ungültige Quest von '" + p.getName() + "' wurde entfernt.");
            return null;
        }
        return qd;
    }
    
    public void removePlayerFromQuest(EntityPlayer p, Script qd)
    {
        if(qd == null)
        {
            return;
        }
        if(qd.removePlayer(p))
        {
            qd.setIsValid(false);
            questData.remove(qd.getId());
        }       
        playerQuestID.remove(p.getUniqueID());
    }
    
    public void removeQuests()
    {
        questData.values().forEach(qd -> qd.setIsValid(false));
        questData.clear();
        playerQuestID.clear();
    }
    
    // -------------------------------------------------------------------------
    // Script - Control
    // -------------------------------------------------------------------------

    public Script getScript(int id)
    {
        return scripts.get(id);
    }
    
    public void removeScripts()
    {
        scripts.values().forEach(qd -> qd.setIsValid(false));
        scripts.clear();
    }
    
    public Collection<Script> getScripts()
    {
        return scripts.values();
    }
    
    // -------------------------------------------------------------------------
    // Quest / Script - Control
    // -------------------------------------------------------------------------
    
    public void add(Script qd, EntityPlayer p)
    {
        if(p != null)
        {
            questData.put(idCounter, qd);
            playerQuestID.put(p.getUniqueID(), qd.getId());
        }
        else
        {
            scripts.put(idCounter, qd);
        }
        idCounter++;
    }
    
    public boolean term(Script qd)
    {
        if(qd == null)
        {
            return false;
        }
        qd.setIsValid(false);
        int id = qd.getId();
        if(qd.isScript())
        {
            KajetansMod.scheduler.scheduleTask(() -> scripts.remove(id), 0);
            return scripts.containsKey(id);
        }
        qd.getPlayers().stream().forEach((player) -> 
        {
            playerQuestID.remove(player.getUniqueID());          
        });
        questData.remove(id);
        return true;
    }

    // -----------------------
    // Quests / Scripts loading and starting
    // -----------------------
    
    public void startQuest(ICommandSender sender, String chosenQuest, EntityPlayer p, Entity executor, String forcedQuest)
    {
        /*List<String> contents = getQuestCode(sender, chosenQuest, false);
        if(contents == null)
        {                       
            return;
        }         */   
        if(hasQuest(p))
        {
            this.send(sender, "Du hast bereits eine Quest.");
            return;
        }
        Script other = getQuests().stream()
                .filter(qd -> qd.getVar("add-if-name") != null)
                .filter(qd -> qd.getVar("add-if-name").equals(chosenQuest))
                .findAny().orElse(null);
        if(other != null)
        {            
            addPlayerToQuest(p, other);
            return;
        }
        Script qd = new Script(idCounter, p, chosenQuest, sender);
        ScriptVars.setPlayerVars(qd, p); 
        if(executor != null)
        {
            ScriptVars.setEntityVars(qd, executor);
        }
        if(forcedQuest != null)
        {
            qd.setVar("force", forcedQuest);
        }
        add(qd, p);
        qd.runCode();
    }
    
    public void startScript(ICommandSender sender, String chosenQuest)
    {
        /*List<String> contents = getQuestCode(sender, chosenQuest, true);
        if(contents == null)
        {                       
            return;
        }          */  
        Script qd = new Script(idCounter, null, chosenQuest, sender);
        add(qd, null);
        if(qd.isValid())
        {
            qd.runCode();
        }
    }
}