LONDON-IOS/GMERemittance/Library/ItemPickerView/ItemsPickerViewController.swift

//
//  ItemsPickerViewController.swift
//  Sipradi
//
//  Created by shishir sapkota on 7/25/17.
//  Copyright © 2017 Ekbana. All rights reserved.
//

import UIKit

class ItemsPickerViewController: UIViewController {
    
    struct Constants {
        static let seperatorColor = "#DFDFDF"
        static let tintColor = UIColor.red
        static let gradientviewLeftColor = UIColor.init(hex: "#FF0000")
        static let gradientviewRightColor = UIColor.init(hex: "#9C272D")
    }
    
    @IBOutlet weak var titleView: UIView!
    @IBOutlet weak var tableVIew: UITableView!
    @IBOutlet weak var searchTextField: UITextField!
    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var noResultFoundLabel: UILabel!
    
    @IBOutlet weak var mainview: UIView!
    
    
    
    var data: [String] = []
    
    var filteredPlaces: [String] = [] {
        didSet {
            self.tableVIew.reloadData()
            self.setNoResultText()
            self.filteredPlaces.isEmpty ? (self.noResultFoundLabel.isHidden = false) : (self.noResultFoundLabel.isHidden = true)
        }
    }
    
    var allowMultipleSelection = false
    var allowSelection = true
    var doneAction: (([String]) -> ())?
    var defaultSelectedData: [String?] = []
    
    var searchText = ""
    var type: PickerTitle?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupTableView()
      
        self.setupSearchService()
        //        self.setupSearchTextFieldUi()
        self.setupPlaces()
        self.titleView.layer.cornerRadius = 10
        self.mainview.layer.cornerRadius = 10
        setTitle()
    }
    

    private func setNoResultText() {
        var text = ""
        if let type = self.type  {
            text = "No matching \(type.rawValue) found for "
        } else {
            text = "No matching result found for "
        }
        self.noResultFoundLabel.text = text + "'\(searchText)'"
    }
    
    private func setTitle() {
        self.titleLabel.text = "Select " + (self.type?.rawValue ?? "Location").capitalized
    }
    
    private func setupPlaces() {
        self.filteredPlaces = self.data
    }
    
    private func setupTableView() {
        self.tableVIew.delegate = self
        self.tableVIew.dataSource = self
        self.tableVIew.separatorColor = UIColor.init(hex: Constants.seperatorColor)
        self.tableVIew.allowsMultipleSelection = self.allowMultipleSelection
        self.tableVIew.allowsSelection = self.allowSelection
    }
    
    private func setupSearchTextFieldUi() {
        //        #imageLiteral(resourceName: "ic_search")
        let searchIconImageView = UIImageView(image: #imageLiteral(resourceName: "ic_search"))
        searchIconImageView.tintColor = Constants.tintColor
        self.searchTextField.leftView = searchIconImageView
        self.searchTextField.leftViewMode = .always
    }
    
    
    private func setupSearchService() {
        self.searchTextField.addTarget(self, action: #selector(self.search(sender:)), for: UIControlEvents.editingChanged)
    }
    
    
    @objc private func search(sender: UITextField) {
        let searchString = sender.text!
        self.searchText = searchString
        if searchString.isEmpty {
            self.filteredPlaces = self.data
            return
        }
        print("searchString : \(searchString), \(filteredPlaces)")
        self.filteredPlaces = self.data.filter({
            return searchString.isEmpty ||
                $0.lowercased().contains(searchString.lowercased())
        }).sorted(by: { (a, _) -> Bool in
            return (a.lowercased() ?? "").hasPrefix(searchString.lowercased())
        })
        print("after search")
        print(filteredPlaces)
    }
    // MARK: IBActions
    
    @IBAction func close(_ sender: Any?) {
        let selectedIndexPaths = self.tableVIew.indexPathsForSelectedRows ?? self.tableVIew.indexPathForSelectedRow.map({[$0]})
        let selectedData = selectedIndexPaths?.flatMap { indexPath -> String? in
            let value = data[indexPath.row]
            return value
        }
        self.doneAction?(selectedData ?? [])
        self.dismiss(animated: true, completion: nil)
    }
    
    
    
    @IBAction func dismiss(_ sender: Any) {
        self.dismiss(animated: true, completion: nil)
    }
    
    @IBAction func clear(_ sender: Any) {
        self.tableVIew.indexPathsForSelectedRows?.forEach({self.tableVIew.deselectRow(at: $0, animated: true)})
        self.tableVIew.indexPathForSelectedRow.map({self.tableVIew.deselectRow(at: $0, animated: true)})
        self.defaultSelectedData = []
        self.tableVIew.reloadData()
    }
    
}

extension ItemsPickerViewController: UITableViewDelegate {
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 75
    }
    
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let cell = tableView.cellForRow(at: indexPath)
        cell?.accessoryType = .checkmark
        
        if !self.allowMultipleSelection {
            self.close(nil)
        }
    }
    
    func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
        let cell = tableView.cellForRow(at: indexPath)
        cell?.accessoryType = .none
    }
}

extension ItemsPickerViewController: UITableViewDataSource {
    
    func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return filteredPlaces.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableVIew.dequeueReusableCell(withIdentifier: "ItemsPickerCell", for: indexPath) as! ItemsPickerCell
        cell.place = self.filteredPlaces.elementAt(index: indexPath.row)
        if let selected = self.defaultSelectedData.first {
            cell.selectedPlace = selected
        }
        cell.setup()
        return cell
    }
}