/*
 *
 * AttributeTree
 *
 * Handles a players individual attribute tree
 *
 *
*/

package jesse.keeblarcraft.AttributeMgr;

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

import jesse.keeblarcraft.Keeblarcraft;
import jesse.keeblarcraft.AttributeMgr.AttributeNodes.AbstractNode;
import jesse.keeblarcraft.ConfigMgr.ConfigManager;
import jesse.keeblarcraft.Utils.ChatUtil;
import jesse.keeblarcraft.Utils.ChatUtil.CONSOLE_COLOR;
import jesse.keeblarcraft.Utils.CustomExceptions.FILE_WRITE_EXCEPTION;

public class AttributeTree {

    PlayerTree playerAttributeTree = new PlayerTree();
    ConfigManager config = new ConfigManager();
    private AbstractNode root = new RootNode();

    private class TreeNode {

        public TreeNode(AbstractNode node, Integer maxLevel, List<String> parents, List<String> children) {
            thisNode = node;
            parentNodes = parents;
            childrenNodes = children;
            maxNodeLevel = maxLevel;
            currentNodeLevel = 1;
        }

        AbstractNode thisNode;
        Integer currentNodeLevel;
        Integer maxNodeLevel;

        // Store the names of the parent and children nodes; this lets a node have any number of parents and children
        // NOTE TO DEVELOPERS: Be aware! The more nodes the harrier the tree will look in the GUI!!! Always test your
        // code before just adding stuff willy-nilly!
        List<String> parentNodes;
        List<String> childrenNodes;
    }

    // Separate structure as this is written to the config file
    private class PlayerTree {
        String uuid;
        // Key = name of AbstractNode
        // Val = The attribute itself
        HashMap<String, TreeNode> tree = new HashMap<String, TreeNode>();
    }

    private class RootNode extends AbstractNode {
        @Override
        public String GetNodeTitle() {
            return "root";
        }

        @Override
        public String GetNodeDescription() {
            return "This is the players tree root! All attributes extend from here";
        }

        @Override
        public HashMap<String, List<String>> GetDetails() {
            HashMap<String, List<String>> ret = new HashMap<String, List<String>>();

            ret.put("First Attribute", List.of("This is your skill tree", "All attributes grow from this root! Unlocking nodes requires all nodes connected to that previously to be unlocked first"));

            return ret;
        }
    }

    // Add a new node to the tree arbitrarily
    // Root can never be a child node
    // parents can never be empty or null (null or empty would imply you are adding root)
    //
    // developer warning: you must personally verify your nodes are in the tree. anywhere is fine, and the tree
    // is very dynamic (which is why self verification is required). When the tree is drawn in the GUI, it starts from
    // the root node. As long as your node is attached to this node anywhere in the indirected graph; then your attribute
    // will be drawn in the gui
    public Boolean AddNewNode(AbstractNode newNode, Integer maxNodeLevel, List<String> parents, List<String> children) {
        Boolean ret = false;
        TreeNode nodeReference = playerAttributeTree.tree.get(newNode.GetNodeTitle());

        System.out.println("Is node reference null? -> " + (nodeReference == null ? "YES":"NO"));
        System.out.println("Is root reference null? -> " + (root == null ? "YES":"NO"));
        System.out.println("Is parents null? -> " + (parents == null ? "YES":"NO"));

        // Some special handling is required on checking child list in case it is null
        Boolean validChildren = true;
        if (children != null) {
            validChildren = !children.contains(root.GetNodeTitle());
        }

        if (nodeReference == null && validChildren) {
            // Since these values can be left as null, we want to guarentee they are at least initialized here
            maxNodeLevel = (maxNodeLevel == null ? 1 : maxNodeLevel);
            parents = (parents == null ? new ArrayList<String>() : parents);
            children = (children == null ? new ArrayList<String>() : children);

            System.out.println("Parent size: " + parents.size());
            if (parents.size() == 0) {
                System.out.println("Root node title: " + root.GetNodeTitle());
                parents.add(root.GetNodeTitle()); // No disconnected nodes allowed! All parentless nodes are adopted by root by default
            }
            System.out.println("Parents size: " + parents.size());

            // Node implementation here
            playerAttributeTree.tree.put(newNode.GetNodeTitle(), new TreeNode(newNode, maxNodeLevel, parents, children));

            long pSize = playerAttributeTree.tree.get(newNode.GetNodeTitle()).parentNodes.size();
            System.out.println("parent size is " + pSize);
        } else {
            // Some fancy error handling for console log
            if (nodeReference != null) {
                Keeblarcraft.LOGGER.error("Attribute with name " + newNode.GetNodeTitle() + " was already found within the tree! Rename your node to add it");
            } else {
                Keeblarcraft.LOGGER.error("The attribute you attempted to add (name: " + newNode.GetNodeTitle() + "), has root in the children");
            }
            ret = false;
        }

        FlashConfig();
        return ret;
    }

    public void ChangeNodeLevel(String nodeName, Integer newLevel) {
        TreeNode nodeReference = playerAttributeTree.tree.get(nodeName);

        if (nodeReference != null) {
            if (newLevel <= nodeReference.maxNodeLevel) {
                nodeReference.currentNodeLevel = newLevel;
            }
        }

        FlashConfig();
    }

    public void DeleteNode(String nodeName) {
        // Do not delete root!
        if (nodeName != root.GetNodeTitle()) {
            playerAttributeTree.tree.remove(nodeName);
        }

        FlashConfig();
    }

    public HashMap<String, List<String>> GetNodeDetails(String nodeName) {
        HashMap<String, List<String>> ret = null;

        TreeNode nodeReference = playerAttributeTree.tree.get(nodeName);

        if (nodeReference != null) {
            ret = nodeReference.thisNode.GetDetails();
        }

        return ret;
    }

    // Returns the player's attribute tree
    public PlayerTree GetPlayerTree() {
        return playerAttributeTree;
    }

    public AttributeTree(String uuid) {
        // DEVELOPER NOTE:
        //  If you are testing this part of the code, please be reminded that anonymous testing starts a new
        //  player instance everytime you launch. This means the UUID CAN CHANGE when you launch the
        //  game! This is not an issue with proper registered accounts in production
        Boolean existingFile = false;
        try {
            playerAttributeTree = config.GetJsonObjectFromFile("attributes/" + uuid + ".json", PlayerTree.class);
            existingFile = true;
        } catch (Exception e) {
            // Do nothing. This means the file does not exist
        }

        // In the event the above code failed out, this means a new file has to be created for the player's uuid
        if (!existingFile)
        {
            System.out.println(ChatUtil.ColoredString("Trying to create new file", CONSOLE_COLOR.BLUE));
            try {
                playerAttributeTree.uuid = uuid;
                FlashConfig();
            } catch (Exception e) {
                System.out.println(ChatUtil.ColoredString("Could not write to file", CONSOLE_COLOR.RED));
            }
        } else {
            System.out.println(ChatUtil.ColoredString("Moving on", CONSOLE_COLOR.BLUE));
        }

        // It's possible the above code will return a blank class if a file doesn't exist. This will make
        // a new file with this players uuid
        if ("".equals(playerAttributeTree.uuid)) {
            System.out.println(ChatUtil.ColoredString("Assigning new config file for this uuid. No previous existing", CONSOLE_COLOR.BLUE));
            playerAttributeTree.uuid = uuid;
        }

        // If the tree is empty or missing root, add it!
        if (playerAttributeTree.tree.size() == 0 || playerAttributeTree.tree.containsKey(root.GetNodeTitle()) == false) {
            playerAttributeTree.tree.put(root.GetNodeTitle(), new TreeNode(root, 1, null, null));
        }
    }

    public void FlashConfig() {
        try {
            config.WriteToJsonFile("attributes/" + playerAttributeTree.uuid + ".json", playerAttributeTree);
        } catch (FILE_WRITE_EXCEPTION e) {
            System.out.println(ChatUtil.ColoredString("Could not flash notes configuration file", CONSOLE_COLOR.RED));
        }
    }
}