//
//  StudyMaterialsViewController.swift
//  LMS
//
//  Created by Suraj Kumar Mandal on 24/08/22.
//

import UIKit
import SideMenu
import Toast_Swift

class StudyMaterialsViewController: UIViewController {

    @IBOutlet var navigationBar: UINavigationBar!
    @IBOutlet var pageNameLabel: UILabel!
    @IBOutlet var unitsCollectionView: UICollectionView!
    
    let userData = DBManager.sharedInstance.database.objects(UserDetailsModel.self)
    
    var viewModel = StudyMaterialsViewModel()
    var unitModel = [UnitsListModel]()
        
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        viewModel.delegate = self
        unitsCollectionView.delegate = self
        unitsCollectionView.dataSource = self
        setupUI()
        getUnitList()
    }
    
    func setupUI() {
        navigationBar.topItem?.title = "Study Materials"
    }
    
    func getUnitList() {
        if Reachability.isConnectedToNetwork() {
            viewModel.getUnitsList(userId: userData[0].id)
        } else {
            Alert.showInternetFailureAlert(on: 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.destination.
        // Pass the selected object to the new view controller.
    }
    */
    
    @IBAction func sideMenuAction(_ sender: UIBarButtonItem) {
        let menu = storyboard!.instantiateViewController(withIdentifier: "SideMenuNavigationController") as! SideMenuNavigationController
        present(menu, animated: true, completion: nil)
    }

}

extension StudyMaterialsViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return unitModel.count
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "UnitsCollectionViewCell", for: indexPath as IndexPath) as! UnitsCollectionViewCell
        
        cell.customView.layer.borderWidth = 1
        cell.customView.layer.borderColor = #colorLiteral(red: 0.8039215803, green: 0.8039215803, blue: 0.8039215803, alpha: 1)
        cell.customView.layer.cornerRadius = 5
        cell.serialNumberLabel.text = "\(indexPath.row + 1)"
        cell.subjectNameLabel.text = unitModel[indexPath.row].name
        
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vc = self.storyboard?.instantiateViewController(withIdentifier: "LessonViewController") as! LessonViewController
        vc.unitId = unitModel[indexPath.row].id ?? 0
        vc.interventionId = unitModel[indexPath.row].intervention?.id ?? 0
        vc.interventionLevelId = unitModel[indexPath.row].level?.id ?? 0
        vc.lessonName = unitModel[indexPath.row].name ?? ""
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        return CGSize(width: (collectionView.frame.size.width-10)/2, height: 240)
    }
}

extension StudyMaterialsViewController: StudyMaterialsProtocol {
    func startLoader() {
        ActivityIndicator.start()
    }
    
    func stopLoader() {
        ActivityIndicator.stop()
    }
    
    func showError(error: String) {
        self.view.makeToast(error)
    }
    
    func unitsModel(model: [UnitsListModel]) {
        self.unitModel = model
        self.unitsCollectionView.reloadData()
    }
}