//
//  attendanceViewController.swift
//  studentHandbook
//
//  Created by Rengar Tsoi on 11/4/2017.
//  Copyright © 2017年 Rengar Tsoi. All rights reserved.
//

import UIKit

class attendanceViewController: UIViewController,UITableViewDelegate, UITableViewDataSource {

    @IBOutlet weak var table: UITableView!


    override func viewDidLoad() {
        super.viewDidLoad()

        table.dataSource = self
        table.delegate = self

        let username = "parentX"
        let password = "pw"


        let urlString = "https://lenchan139.org/myWorks/fyp/android/attendDetails.php?username=" + username + "&password=" + password;

        get_data(urlString)

        print(urlString)

        //print(get_data(urlString))

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)

    }

    var list:[MyStruct] = [MyStruct]()

    struct MyStruct
    {
        var attend = ""


        init(_ attend:String)
        {
            self.attend = attend

        }
    }




    func get_data(_ link:String)
    {
        let url:URL = URL(string: link)!
        let session = URLSession.shared

        let request = URLRequest(url: url)

        let task = session.dataTask(with: request, completionHandler: {
            (data, response, error) in

            self.extract_data(data)

        })

        task.resume()
    }


    func extract_data(_ data:Data?)
    {
        let json:Any?

        if(data == nil)
        {
            return
        }

        do{
            json = try JSONSerialization.jsonObject(with: data!, options: [])
        }
        catch
        {
            return
        }

        guard let data_array = json as? NSArray else
        {
            return
        }


        for i in 0 ..< data_array.count
        {
            if let data_object = data_array[i] as? NSDictionary
            {
                if let data_code = data_object["attend_date"] as? String

                {
                    list.append(MyStruct(data_code))
                }

            }
        }


        refresh_now()


    }

    func refresh_now()
    {
        DispatchQueue.main.async(
            execute:
            {
                self.table.reloadData()

        })
    }



    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
    {

        return list.count
    }

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


        cell.textLabel?.text = list[indexPath.row].attend


        return cell
    }





    @IBAction func logoutBtn(_ sender: Any) {
        UserDefaults.standard.set(nil, forKey: "username");
        UserDefaults.standard.set(nil, forKey: "password");
        UserDefaults.standard.synchronize()

        let username = UserDefaults.standard.string(forKey: "username");
        let password = UserDefaults.standard.string(forKey: "password");

        if(username == nil && password == nil){

            performSegue(withIdentifier: "loginPage", sender: self)

        }
    }






    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}