//
//  ViewController.swift
//  TestTableViewGroup
//
//  Created by USER1 on 09.11.19.
//  Copyright © 2019 HSHARZ. All rights reserved.
//

import UIKit

// WMIC memorychip get banklabel, datawidth,capacity,speed,totalwidth

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    
    
    var staedte = [Stadt]()
    let staedteDB:StaedteDB = StaedteDB()
    var group:Bool = false
    
    struct CitySection {
        var kontinent: Continent
        var staedte: [Stadt]
    }
    var sections = [CitySection]()
    
    // Referenzen
    @IBOutlet var labelRow: UILabel!
    @IBOutlet var labelInfo: UILabel!
    
    @IBOutlet var bnGroup: UIButton!
    @IBOutlet var bnChange: UIButton!
    @IBOutlet var bnNew: UIButton!
    @IBOutlet var tableview: UITableView!
    
    @IBAction func bnGroup(_ sender: UIButton) {
           group = !group
           tableview.reloadData()
    }
    
    
    func numberOfSections(in tableView: UITableView) -> Int {
        if group {
            return sections.count
        }
        else {
            return 1
        }
      }
    
    
      
      func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if group {
             let section = self.sections[section]
             return section.staedte.count
        }
        else {
          return staedte.count
        }
      }
    
    // SelectecIndexChanged
          func tableView(_: UITableView, didSelectRowAt: IndexPath) {
              bnChange.isEnabled=true
              let row = (didSelectRowAt as NSIndexPath).row
              labelRow.text="row: "+String(row)
                if group {
                    if let indexPath = tableview.indexPathForSelectedRow {
                       let section = self.sections[indexPath.section]
                        let stadt = section.staedte[indexPath.row]
                          labelInfo.text=stadt.name
                    }
                }
                else {
                    if let indexPath = tableview.indexPathForSelectedRow {
                        let stadt:Stadt = staedte[(indexPath as NSIndexPath).row]
                        labelInfo.text=stadt.name
                    }
                }
                
          }
       
    
    func getKontinentText(_ kontinent:Continent) -> String {
        switch (kontinent) {
         case Continent.AFRIKA:
            return "Afrika"
            case Continent.AMERIKA:
               return "Amerika"
            case Continent.ASIEN:
               return "Asien"
            case Continent.AUSTRALIA:
               return "Australien"
            case Continent.EUROPA:
               return "Europa"
            default:
                   return "Afrika"
        }
    }
    func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        if group {
            let section = self.sections[section]
            let kontinent = section.kontinent
            return getKontinentText(kontinent)
        }
        else {
            return "Liste"
        }
        
    }
   
      
      // UITableViewCellStyle.default: Bild links, Titel rechts
      // UITableViewCellStyle.subtitle: Bild links, Titel rechts, darunter Zusatzinformation
      // UITableViewCellStyle.value1: Bild links, Titel in der Mitte, rechts Zusatzinformation
      // UITableViewCellStyle.value2: Zusatzinformation links, rechts Titel
      // text, detailTextLabel, imageView

       func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
          var cell = tableView.dequeueReusableCell(withIdentifier: "cell")
          if cell == nil {
              cell = UITableViewCell(style: UITableViewCell.CellStyle.subtitle, reuseIdentifier: "cell")
          
          }
        let row = (indexPath as NSIndexPath).row
        if group {
            let section = self.sections[indexPath.section]
            let stadt = section.staedte[indexPath.row]
            cell?.textLabel?.text = stadt.name
            cell?.detailTextLabel?.text = stadt.bemerkung
            
            
                switch (stadt.kontinent) {
                 case Continent.AFRIKA:
                    cell?.imageView!.image = UIImage(named: "schwarz")
                    case Continent.AMERIKA:
                       cell?.imageView!.image = UIImage(named: "rot")
                    case Continent.ASIEN:
                       cell?.imageView!.image = UIImage(named: "gelb")
                    case Continent.AUSTRALIA:
                       cell?.imageView!.image = UIImage(named: "gruen")
                    case Continent.EUROPA:
                       cell?.imageView!.image = UIImage(named: "blau")
                    default:
                           cell?.imageView!.image = UIImage(named: "schwarz")
                }
            
        }
        else {
                  let stadt:Stadt = staedte[ row ]
                  cell?.textLabel!.text = stadt.name
                  cell?.detailTextLabel!.text=stadt.bemerkung
                   
                   switch (stadt.kontinent) {
                   case Continent.AFRIKA:
                      cell?.imageView!.image = UIImage(named: "schwarz")
                      case Continent.AMERIKA:
                         cell?.imageView!.image = UIImage(named: "rot")
                      case Continent.ASIEN:
                         cell?.imageView!.image = UIImage(named: "gelb")
                      case Continent.AUSTRALIA:
                         cell?.imageView!.image = UIImage(named: "gruen")
                      case Continent.EUROPA:
                         cell?.imageView!.image = UIImage(named: "blau")
                      default:
                             cell?.imageView!.image = UIImage(named: "schwarz")
                  }
            
        }

          return cell!
       }
    
    // Rücksprung vom ChangeViewController Abbruch
     @IBAction func unwindCancel(_ segue:UIStoryboardSegue) {
    // keine Aktion notwendig
    }  // unwindToEditViewCancel

    
    // Rücksprung vom ChangeViewController save
        @IBAction func unwindSave(_ segue:UIStoryboardSegue) {
       // keine Aktion notwendig
       }  // unwindSave
    
    // Rücksprung vom ChangeViewController save oder delete
        @IBAction func unwindDelete(_ segue:UIStoryboardSegue) {
       // keine Aktion notwendig
       }  // unwindDelete

         
    override func viewDidLoad() {
        super.viewDidLoad()
            let b=false
            staedte = staedteDB.loadStaedte(db: b)
            
            tableview.delegate = self
            tableview.dataSource = self
        
      
        
        let groups = Dictionary(grouping: self.staedte) {
            (stadt) in
            return stadt.kontinent
        }
        
        self.sections = groups.map {
            (key, values) in
            return CitySection(kontinent: key, staedte: values)
        }
    }


}