CartController

//
//  CartController.swift
//  PeriplusApp
//
//  Created by Muhammad Husain on 7/18/17.
//  Copyright © 2017 Muhammad Husain All rights reserved.
//

import UIKit
import CoreData
import Alamofire

class CartController : BaseViewController {
    // MARK: Properties
    @IBOutlet weak var priceLabel: UILabel!
    @IBOutlet weak var checkoutButton: UIButton!
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var emptyCartImageView: UIImageView!
    @IBOutlet weak var deleteAllButton: UIBarButtonItem!
    var price : Double = 0
    var index : Int = 0
    var productDetail : [ProductDetail] = []
    var productList : [NSManagedObject] = []
    var productUpdate : [Double] = []
    var url : [String] = []
    var count: Int = 0



    // MARK: General
    override func setView() {
        super.setView()
        showProgressView()
        setupLayout()
        fetchCoreData()
        //self.navigationController?.navigationBar.topItem?.title = ""

    }

    // MARK: Actions

    @IBAction func deleteAll(_ sender: Any) {
        if productList.count != 0 {
            showCustomAlert("Confirmation", "Ok", "Cancel", "All data will be lost.","DeleteAll")
        } else {
            showAlert("Information", "You dont have any product on your cart")
        }
    }

    override func alertActionAgree(_ status: String) {
        if status == "DeleteAll" {
            self.deleteAllDataCore()
        }
        if status == "Login" {
            self.showLoginScreen()
        }
    }

    override func alertActionAgree(_ status: String, _ index: Int) {
        if status == "RemoveProduct" {
            self.deleteProduct(index: index)
        }
    }

    func fetchCoreData() {
        self.price = 0
        self.index = 0
        self.productDetail.removeAll()
        self.url.removeAll()
        guard let appDelegate =
            UIApplication.shared.delegate as? AppDelegate else {
                return
        }
        let managedContext =
            appDelegate.persistentContainer.viewContext

        let fetchRequest =
            NSFetchRequest<NSManagedObject>(entityName: "ProductList")

        do {
            productList = try managedContext.fetch(fetchRequest)
            if productList.count != 0 {
                self.emptyCartImageView.isHidden = true
                for i in 0..<productList.count{
                    if isLogin() {
                         self.url.append("\(url_productdetail2)&product_id=\(productList[i].value(forKey: "product_id") as! String)")
                    } else {
                         self.url.append("\(url_productdetail)&product_id=\(productList[i].value(forKey: "product_id") as! String)")
                    }

                }
                setupJSON()
            }
            else {
                self.hideProgressView()
                self.emptyCartImageView.isHidden = false
                self.priceLabel.backgroundColor = UIColor.white
                self.priceLabel.isHidden = true
                self.deleteAllButton.isEnabled = false
                self.checkoutButton.isHidden = true
            }
        } catch let error as NSError {
            print("Could not fetch. \(error), \(error.userInfo)")
        }
        self.tableView.reloadData()
    }

    func updateQuantity (id:String, quantity:Int, index:Int) {
        guard let appDelegate =
            UIApplication.shared.delegate as? AppDelegate else {
                return
        }

        let managedContext =
            appDelegate.persistentContainer.viewContext

        let fetchRequest =
            NSFetchRequest<NSManagedObject>(entityName: "ProductList")

        do {
            productList = try managedContext.fetch(fetchRequest)
            let product = productList[index]
            product.setValue(id, forKey: "product_id")
            product.setValue(quantity, forKey: "quantity")

            do {
                try managedContext.save()
            } catch let error as NSError  {
                print("Could not save \(error), \(error.userInfo)")
            }
        } catch let error as NSError {
            print("Could not fetch. \(error), \(error.userInfo)")
        }
    }

    func priceStringToDouble(price : String) -> Double {
        let a = price.replacingOccurrences(of: "Rp ", with: "", options: .literal, range: nil)
        let b : Double = Double(a.replacingOccurrences(of: ",0", with: "0", options: .literal, range: nil))!

        return b
    }

    func setupJSON() {
        Alamofire.request(self.url[index]).responseJSON { response in
            switch (response.result) {
            case .success:
                guard let product = response.result.value as? [NSDictionary] else {
                    print("didn't get todo object as JSON from API")
                    print("Error: \(String(describing: response.result.error))")
                    return
                }

                self.productDetail.append(ProductDetail(dictionary: product[0])!)
                if self.productDetail.count == self.productList.count {
                    for i in 0..<self.productDetail.count{

                        if self.productDetail[i].special != "" &&  self.productDetail[i].special != nil {
                            let a = Double(self.productDetail[i].special!)!
                            let qtty = self.productList[i].value(forKey: "quantity") as! Int
                            self.productUpdate.append(a)
                            self.price = self.price + (a * Double(qtty))
                        } else if self.productDetail[i].price_asli != "" &&  self.productDetail[i].price_asli != nil {
                            let a = Double(self.productDetail[i].price_asli!)!
                            let qtty = self.productList[i].value(forKey: "quantity") as! Int
                            self.productUpdate.append(a)
                            self.price = self.price + (a * Double(qtty))

                        }
                    }
                }


                self.index = self.index+1

                if self.index < self.url.count {
                    self.setupJSON()
                }
                else {
                    self.hideProgressView()
                    self.priceLabel.text = "Total: Rp. " + String.localizedStringWithFormat("%.0f", self.price)
                    self.tableView.reloadData()
                }
                break
            case .failure(let error):
                self.hideProgressView()
                if error._code == NSURLErrorTimedOut {
                    //HANDLE TIMEOUT HERE
                    self.showAlert("Alert", "Connection Problem: Request time out")
                }
                print("\n\nAuth request failed with error:\n \(error)")
                break
            }
        }
    }

    func deleteAllDataCore() {
        let delegate = UIApplication.shared.delegate as! AppDelegate
        let context = delegate.persistentContainer.viewContext

        let deleteFetch = NSFetchRequest<NSFetchRequestResult>(entityName: "ProductList")
        let deleteRequest = NSBatchDeleteRequest(fetchRequest: deleteFetch)

        do {
            try context.execute(deleteRequest)
            try context.save()
        }
        catch {
            print ("There was an error")
        }
        fetchCoreData()
    }

    @IBAction func checkoutClick(_ sender: Any) {
        checkSession()
    }

    func checkSession() {
        let getUserID = UserDefaults.standard.string(forKey: "customer_id")

        if getUserID != nil {
            let vc = storyboard?.instantiateViewController(withIdentifier: "Checkout") as! CheckoutController
            vc.hidesBottomBarWhenPushed = true
            self.navigationController?.pushViewController(vc, animated: true)
        } else {
            self.showCustomAlert("Information", "Login", "Cancel", "You should login if you want to order", "Login")
        }
    }
    func showLoginScreen() {
        let vc = storyboard?.instantiateViewController(withIdentifier: "Login") as! LoginAccountController
        vc.status = true
        let navController = UINavigationController(rootViewController: vc)
        self.present(navController, animated:false, completion: nil)
    }

    func deleteProduct(index: Int) {
        guard let appDelegate =
            UIApplication.shared.delegate as? AppDelegate else {
                return
        }

        let managedContext =
            appDelegate.persistentContainer.viewContext

        managedContext.delete(productList[index])
        do {
            try managedContext.save()
            productList.remove(at: index)
            fetchCoreData()
        }
        catch let error as NSError {
            print("Error While Deleting Note: \(error.userInfo)")
        }
    }

    @IBAction func deleteButtonClick(_ sender: UIButton) {
        showCustomAlert("Confirmation", "Yes", "No", "Are you sure to remove product from cart?", "RemoveProduct", sender.tag)
    }


    //    func deleteAddress(index: Int) {
//        showProgressView()
//        var parameters = [String:Any]()
//        parameters["address_id"] = address[index].address_id
//        parameters["customer_id"] = self.userId
//        parameters["key_id"] = self.keyId
//        //        requestPOST("\(url_getaddress)delete&customer_id=\(getUserId())&address_id=\((address[index].address_id)!)")
//        requestPOST("\(url_deleteaddress)",parameters)
//    }

    // onprogress
    func getTotalPrice(index: Int, quantity: Int, price: Double) -> Double {
        productUpdate[index] = Double(quantity) * price
        var total : Double = 0
        for i in 0..<productUpdate.count {
            total = total + productUpdate[i]
        }
        return total
    }

    // MARK: Utilities
    func setupLayout(){
        self.tableView.separatorStyle = UITableViewCellSeparatorStyle.none
        self.checkoutButton.tintColor = UIColor(hex: "009499")
        self.navigationController?.navigationBar.tintColor = UIColor.white
        self.navigationController?.navigationBar.barTintColor = UIColor(hex: "009499")
        self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName :UIColor.white]
    }



    @IBAction func imageButtonClick(_ sender: UIButton) {
            let vc = storyboard?.instantiateViewController(withIdentifier: "Promo") as! ProductDetailController
            if isLogin(){
                vc.url = "\(url_productdetail2)&product_id=\(productDetail[sender.tag].product_id ?? "")"
            } else {
                vc.url = "\(url_productdetail)&product_id=\(productDetail[sender.tag].product_id ?? "")"
            }
            vc.hidesBottomBarWhenPushed = true
        self.navigationController?.pushViewController(vc, animated: false)
    }
}


extension CartController: UITableViewDelegate {
    // Override to support editing the table view.
    func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
        if editingStyle == .delete {
            guard let appDelegate =
                UIApplication.shared.delegate as? AppDelegate else {
                    return
            }

            let managedContext =
                appDelegate.persistentContainer.viewContext

            managedContext.delete(productList[indexPath.row])
            productDetail.remove(at: indexPath.row)
            do {
                try managedContext.save()
            }
            catch let error as NSError {
                print("Error While Deleting Note: \(error.userInfo)")
            }
            tableView.deleteRows(at: [indexPath], with: .left)
            fetchCoreData()
        }
    }

    func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
        return true
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let item = productDetail[indexPath.row]
        let vc = storyboard?.instantiateViewController(withIdentifier: "Cart") as! ProductDetailController
        vc.url = "\(url_productdetail)&product_id=\(String(describing: item.product_id!))"
        vc.hidesBottomBarWhenPushed = true
        self.navigationController?.pushViewController(vc, animated: false)
    }
}

extension CartController: UITableViewDataSource {
    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell: CartCell = tableView.dequeueReusableCell(withIdentifier: "cartCell") as! CartCell
//        let cell: TestCell = tableView.dequeueReusableCell(withIdentifier: "TestCell") as! TestCell
        let item = productList[indexPath.row]
        count = productList.count
        cell.quantity = item.value(forKey: "quantity") as! Int
        if productList.count == productDetail.count {
            cell.cartTitleLabel.text = productDetail[indexPath.row].name
            cell.cartPriceLabel.text = productDetail[indexPath.row].price
//            let tap = UITapGestureRecognizer(target: self, action: #selector(UIViewController.tappedMe))
//
//            cell.cartImageView.addGestureRecognizer(tap)


            cell.cartQuantityNumberLabel.text = String(cell.quantity)
            let current_quantity = cell.quantity

            if productDetail[indexPath.row].image != nil {
                let url = URL(string: productDetail[indexPath.row].image!)
                let data = try? Data(contentsOf: url!)
                if data != nil {
                    cell.imageButton.setImage(UIImage(data: data!), for: .normal)
//                    cell.cartImageView.image = UIImage(data: data!)
                }
                else {
                    cell.imageButton.setImage(#imageLiteral(resourceName: "default_image"), for: .normal)}
//                    cell.cartImageView.image = #imageLiteral(resourceName: "default_image") }
            } else {
                cell.imageButton.setImage(#imageLiteral(resourceName: "default_image"), for: .normal)
//                cell.cartImageView.image = #imageLiteral(resourceName: "default_image")
            }

            DispatchQueue.main.async {
                if current_quantity != cell.quantity {
                    self.updateQuantity(id: item.value(forKey: "product_id") as! String, quantity: cell.quantity, index: indexPath.row)
                    self.fetchCoreData()
                }
                self.tableView.reloadData()
            }

            cell.imageButton.tag = indexPath.row
            cell.imageButton.addTarget(self, action: #selector(imageButtonClick(_:)), for: .touchUpInside)

            cell.deleteButton.tag = indexPath.row
            cell.deleteButton.addTarget(self, action: #selector(deleteButtonClick(_:)), for: .touchUpInside)
        }

        cell.backgroundColor = UIColor.clear
        return cell
    }



    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return productList.count
    }

}