//
//  MasterViewController.swift
//  JSONCreator
//
//  Created by Scott Pfeil on 8/2/19.
//  Copyright © 2019 Verizon Wireless. All rights reserved.
//

import UIKit

class MasterViewController: UITableViewController {

    let folderPath = Bundle.main.resourcePath! + "/JSON"

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }

    // MARK: - Table View
    
    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return try! FileManager.default.contentsOfDirectory(atPath: folderPath)[section]
    }

    override func numberOfSections(in tableView: UITableView) -> Int {
        return try! FileManager.default.contentsOfDirectory(atPath: folderPath).count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return try! FileManager.default.contentsOfDirectory(atPath: folderPath + "/" + FileManager.default.contentsOfDirectory(atPath: folderPath)[section]).count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)

        let name = try! FileManager.default.contentsOfDirectory(atPath: folderPath + "/" + FileManager.default.contentsOfDirectory(atPath: folderPath)[indexPath.section])[indexPath.row]
        cell.textLabel?.text = name
        
        if cell.interactions.first == nil {
            let dragInteraction = UIDragInteraction(delegate: self)
            cell.addInteraction(dragInteraction)
        }
        return cell
    }

    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        // Return false if you do not want the specified item to be editable.
        return true
    }
}

extension MasterViewController: UIDragInteractionDelegate {
    func dragInteraction(_ interaction: UIDragInteraction, itemsForBeginning session: UIDragSession) -> [UIDragItem] {
        let location = session.location(in: tableView)
        let indexPath = tableView.indexPathForRow(at: location)
        let sectionName = try! FileManager.default.contentsOfDirectory(atPath: folderPath)[indexPath!.section]
        let path = try! folderPath + "/" + sectionName + "/" + FileManager.default.contentsOfDirectory(atPath: folderPath + "/" + sectionName)[indexPath!.row]
        let content = try! String.init(contentsOfFile: path)
        let provider = NSItemProvider(object: content as NSString)
        let item = UIDragItem(itemProvider: provider)
        return [item]
    }
}