const folder = require('../models/folder.model');

exports.getFoldersByHierarchy = async (req, res) => {
    let folders = await folder.findAll();
    let hierarchy = []

    for (let i = 0; i < folders.length; i++) {
        folders[i].dataValues.subFolders = []
    }

    let curNode = findByValue(folders, "folderParent", null);
    while (folders.length > 0 && curNode != null) {
        
        let childNode = findByValue(folders, "folderParent", curNode.folderId)

        if (childNode) {
            curNode.dataValues.subFolders.push(childNode);
            curNode = childNode;
        }
        else if (curNode.folderParent != null) {
            folders.splice(folders.indexOf(curNode), 1);
            curNode = findByValue(folders, "folderId", curNode.folderParent);
        }
        else {
            folders.splice(folders.indexOf(curNode), 1);
            hierarchy.push(curNode);
            curNode = findByValue(folders, "folderParent", null);
            
        }

    }

    res.json(hierarchy);
}

exports.getFolders = async (req, res) => {
    const folders = await folder.findAll();
    res.json(folders);
}

exports.getFoldersById = async (req, res) => {

    const id = req.params.id

    const folders = await folder.findAll({
        where: {
            folderId: id,
        }},
    );
    res.json(folders);
}

exports.createFolder = async (req, res) => {
    const jsonFolder = req.body;

    await folder.create({
        folderName: jsonFolder.name,
        folderParent: jsonFolder.parent,
    });

    res.status(201).json("ok");
}

exports.updateFolder = async (req, res) => {
    
    const folderId = req.params.id
    const jsonFolder = req.body;

    await folder.update({
        folderName: jsonFolder.name,
        folderParent: jsonFolder.parent,
    },
    {
        where: {
            folderId: folderId,
        },
    });

    res.status(200).json("ok");
}

function findByValue(list, key, value) {

    for (el of list) {
        if (el[key] == value) {
            return el;
        }
    }

    return null;
}