//
//  UnifiedCouponsViewController.swift
//  SwiftWarplyFramework
//
//  Created by Manos Chorianopoulos on 20/10/23.
//

import Foundation
import UIKit
import SwiftEventBus

@objc public class UnifiedCouponsViewController: UIViewController {
    @IBOutlet weak var backgroundImage: UIImageView!
    @IBOutlet weak var tableView: UITableView!
    @IBOutlet weak var emptyView: UIView!
    @IBOutlet weak var emptyViewHeight: NSLayoutConstraint!
    @IBOutlet weak var emptyLabel: UILabel!
    @IBOutlet weak var submitButton: UIButton!
    
    public var unifiedCoupons:Array<swiftApi.UnifiedCouponModel> = []
    public var smCoupons:Array<swiftApi.CouponItemModel> = []
    public var smCouponsSelected:Array<swiftApi.CouponItemModel> = []
    
    // A reference to the Select All image view for later use
    var circleImageView: UIImageView!
    
    // Track the selection state
    var isSelectAllActive: Bool = false
    

    public override func viewDidLoad() {
        super.viewDidLoad()
        
        self.hidesBottomBarWhenPushed = true

        SwiftEventBus.onBackgroundThread(self, name: "unified_coupons_fetched") { result in

            DispatchQueue.main.async {
                self.unifiedCoupons = swiftApi().getUnifiedCouponList()
                // self.tableView.reloadData()
                // Reload the Unified Coupons section only
                self.tableView.reloadSections(IndexSet(integer: 0), with: .automatic)
                
                if (self.unifiedCoupons.count == 0 && self.smCoupons.count == 0) {
                    self.emptyView.isHidden = false
                    self.emptyViewHeight.constant = self.emptyView.intrinsicContentSize.height
                } else {
                    self.emptyView.isHidden = true
                    self.emptyViewHeight.constant = 0
                }
            }
        }

        SwiftEventBus.onBackgroundThread(self, name: "sm_coupons_fetched") { result in

            DispatchQueue.main.async {
                self.smCoupons = swiftApi().getSMCouponList()
                // self.tableView.reloadData()
                // Reload the SM Coupons section only
                self.tableView.reloadSections(IndexSet(integer: 1), with: .automatic)
                
                if (self.unifiedCoupons.count == 0 && self.smCoupons.count == 0) {
                    self.emptyView.isHidden = false
                    self.emptyViewHeight.constant = self.emptyView.intrinsicContentSize.height
                } else {
                    self.emptyView.isHidden = true
                    self.emptyViewHeight.constant = 0
                }
            }
        }
        
        setBackButton()
        setNavigationTitle("SUPERMARKET DEALS")
        // Setup the info button with an action
        setNavBarRightInfoButton() {
            // This closure is the action that will be executed when the info button is tapped
            self.presentInfoPopup()
        }
        
//        backgroundImage.image = UIImage(named: "coupons_scrollview_dark", in: MyEmptyClass.resourceBundle(), compatibleWith: nil)
        
        tableView.delegate = self
        tableView.dataSource = self
        
//        tableView.clipsToBounds = true
//        tableView.layer.cornerRadius = 30
//        tableView.layer.maskedCorners = [ .layerMinXMinYCorner] // Top left corner radius
//        tableView.contentInset.top = 30
        tableView.contentInset.bottom = 115
        
        emptyLabel.text = "Αυτήν τη στιγμή δεν έχεις κάποιο ενεργό κουπόνι. Στην ενότητα FOR YOU μπορείς να βρεις κουπόνια αποκλειστικά για σένα!"
        
        submitButton.setTitle("Συνδύασε τις προσφορές σε ένα κουπόνι", for: .normal)
        submitButton.setTitleColor(.white, for: .normal)
        submitButton.layer.cornerRadius = 16.0
//        submitButton.backgroundColor = UIColor(red: 0.05, green: 0.65, blue: 0.00, alpha: 1.00)
        submitButton.backgroundColor = UIColor(rgb: 0x9D9D9C)
        submitButton.isEnabled = false
//        submitButton.frame = CGRect(x: 0.0, y: 0.0, width: submitButton.intrinsicContentSize.width, height: 50)
//        submitButton.contentEdgeInsets = UIEdgeInsets(top: 0, left: 25, bottom: 0, right: 25)
        // Fix width for ipad
        if UIDevice.current.userInterfaceIdiom == .pad {
             // iPad
            submitButton.titleLabel?.font = UIFont(name: "PeridotPE-SBold", size: 18)
//            submitButton.widthAnchor.constraint(equalToConstant: 250).isActive = true
         } else {
             // not iPad (iPhone, mac, tv, carPlay, unspecified)
             submitButton.titleLabel?.font = UIFont(name: "PeridotPE-SBold", size: 16)
//             submitButton.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.6).isActive = true
         }
    }
    
    public override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        swiftApi().logTrackersEvent("screen", "ActiveUnifiedCouponsScreen")
        
        self.unifiedCoupons = swiftApi().getUnifiedCouponList()
        self.smCoupons = swiftApi().getSMCouponList()
        self.tableView.reloadData()
        
        if (self.unifiedCoupons.count == 0 && self.smCoupons.count == 0) {
            self.emptyView.isHidden = false
            self.emptyViewHeight.constant = self.emptyView.intrinsicContentSize.height
        } else {
            self.emptyView.isHidden = true
            self.emptyViewHeight.constant = 0
        }

        self.navigationController?.hideHairline()
    }

    // MARK: - Functions
    // Button action for "select all"
    @objc func selectAllTapped() {
        // Toggle the selection state
        isSelectAllActive.toggle()
        
        // Update the image based on the new state
        if (isSelectAllActive) {
            circleImageView.image = UIImage(named: "circle_checked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil) // Selected image
            smCouponsSelected = smCoupons
        } else {
            circleImageView.image = UIImage(named: "circle_unchecked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil) // Unselected image
            smCouponsSelected = []
        }
        
        handleSubmitButtonUI()
        
        // Reload the SM Coupons section only
        tableView.reloadSections(IndexSet(integer: 1), with: .automatic)
    }
    
    func handleSelectCouponAction(indexPath: IndexPath) {
        let currentCoupon = self.smCoupons[indexPath.row]
        let isCouponSelected = self.smCouponsSelected.contains { $0.coupon == currentCoupon.coupon }
        
        if (isCouponSelected) {
            self.smCouponsSelected = self.smCouponsSelected.filter({ return $0.coupon != currentCoupon.coupon })
            if (isSelectAllActive) {
                isSelectAllActive = false
                // Reload the SM Coupons section only
                tableView.reloadSections(IndexSet(integer: 1), with: .automatic)
                
            } else {
                tableView.reloadRows(at: [indexPath], with: .automatic) // Reload the specific row
            }
            
        } else {
            self.smCouponsSelected.append(currentCoupon)
            if (self.smCouponsSelected.count == self.smCoupons.count) {
                isSelectAllActive = true
                // Reload the SM Coupons section only
                tableView.reloadSections(IndexSet(integer: 1), with: .automatic)
                
            } else {
                tableView.reloadRows(at: [indexPath], with: .automatic) // Reload the specific row
            }
        }
        handleSubmitButtonUI()
    }
    
    private func presentInfoPopup() {
        let storyboard = UIStoryboard(name: "Main", bundle: Bundle(for: MyEmptyClass.self))
        if let popupVC = storyboard.instantiateViewController(withIdentifier: "PopupInfoViewController") as? SwiftWarplyFramework.PopupInfoViewController {
            popupVC.modalPresentationStyle = .overCurrentContext
            popupVC.modalTransitionStyle = .crossDissolve
            self.present(popupVC, animated: true, completion: nil)
        }
    }
    
    func handleSubmitButtonUI() {
        if (self.smCouponsSelected.count > 0) {
            submitButton.backgroundColor = UIColor(rgb: 0x0EA600)
            submitButton.isEnabled = true
            
        } else {
            submitButton.backgroundColor = UIColor(rgb: 0x9D9D9C)
            submitButton.isEnabled = false
        }
    }
    
    func showSuccessDialog() -> Void {

        let alert = UIAlertController(title: "Δημιουργία Κουπονιού", message: "Το ενιαίο κουπόνι σου δημιουργήθηκε επιτυχώς.", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
            switch action.style{
                case .default:
                print("default")
//                self.navigationController?.popViewController(animated: true)
                // self.dismiss(animated: true, completion: {})

                case .cancel:
                print("cancel")

                case .destructive:
                print("destructive")

            }
        }))
        self.present(alert, animated: true, completion: nil)
    }
    
    func showFailureDialog() -> Void {

        let alert = UIAlertController(title: "Αποτυχία Δημιουργίας Κουπονιού", message: "Το ενιαίο κουπόνι σου δεν δημιουργήθηκε. Προσπάθησε ξανά.", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
            switch action.style{
                case .default:
                print("default")

                case .cancel:
                print("cancel")

                case .destructive:
                print("destructive")

            }
        }))
        self.present(alert, animated: true, completion: nil)
    }
    
    // MARK: - Actions
    @IBAction func submitButtonAction(_ sender: Any) {
//        let smCouponsString = self.smCouponsSelected.map { $0.coupon ?? "" }.joined(separator: ",")
//        swiftApi().logTrackersEvent("click", ("UnifySMCoupons:" + (smCouponsString)))
        
        let smCouponCodes = self.smCouponsSelected.map { $0.coupon ?? "" }
        swiftApi().createUnifiedCouponAsync(couponCodes: smCouponCodes) { responseData in
            if (responseData != nil) {
                DispatchQueue.main.async {
                    if (responseData?.getStatus == 1) {
                        self.smCouponsSelected = []
                        self.circleImageView.image = UIImage(named: "circle_unchecked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil) // Unselected image
                        self.handleSubmitButtonUI()
                        // Reload the SM Coupons section only
                        self.tableView.reloadSections(IndexSet(integer: 1), with: .automatic)
                        
                        self.showSuccessDialog()
                    }
                    
                }
            }
        } failureCallback: { errorCode in
            self.showFailureDialog()
        }

    }
}

// MARK: - TableView
extension UnifiedCouponsViewController: UITableViewDelegate, UITableViewDataSource{
    
    public func numberOfSections(in tableView: UITableView) -> Int {
        return 2
    }
    
    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if (section == 0) {
            return self.unifiedCoupons.count
        } else if (section == 1) {
            return self.smCoupons.count
        } else {
            return 0
        }
    }
    
    public func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        if (indexPath.section == 0) {
            return 130.0 + 8.0
    //        return UITableViewAutomaticDimension
        } else if (indexPath.section == 1) {
            return 130.0 + 8.0
        } else {
            return 0.0
        }
    }
    
    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        if (indexPath.section == 0) {
            let cell = tableView.dequeueReusableCell(withIdentifier: "UnifiedCouponsTableViewCellId", for: indexPath) as! UnifiedCouponsTableViewCell
            cell.configureCell(coupon: unifiedCoupons[indexPath.row])
            return cell

        } else {
            let currentCoupon = self.smCoupons[indexPath.row]
            let isCouponSelected = self.smCouponsSelected.contains { $0.coupon == currentCoupon.coupon }
            
            let cell = tableView.dequeueReusableCell(withIdentifier: "CouponsTableViewCellId", for: indexPath) as! CouponsTableViewCell
            cell.configureCell(coupon: smCoupons[indexPath.row])
            cell.showSelectButton(isSelectViewVisible: true, isSelected: isCouponSelected) {
                self.handleSelectCouponAction(indexPath: indexPath)
            }
            return cell
        }
    }
    
    public func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        if (indexPath.section == 0) {
            let couponBarcode = unifiedCoupons[indexPath.row]._barcode
            swiftApi().logTrackersEvent("click", ("UnifiedCoupon:" + couponBarcode))

            let storyboard = UIStoryboard(name: "Main", bundle: Bundle(for: MyEmptyClass.self))
            let vc = storyboard.instantiateViewController(withIdentifier: "UnifiedCouponBarcodeViewController") as! SwiftWarplyFramework.UnifiedCouponBarcodeViewController
            vc.coupon = unifiedCoupons[indexPath.row]
            vc.isFromWallet = true
            self.navigationController?.pushViewController(vc, animated: true)

        } else if (indexPath.section == 1) {
            let couponSetData: swiftApi.CouponSetItemModel? = smCoupons[indexPath.row].couponset_data
            let couponName = couponSetData?.name ?? ""
            swiftApi().logTrackersEvent("click", ("Coupon:" + couponName))

            let storyboard = UIStoryboard(name: "Main", bundle: Bundle(for: MyEmptyClass.self))
            let vc = storyboard.instantiateViewController(withIdentifier: "CouponBarcodeViewController") as! SwiftWarplyFramework.CouponBarcodeViewController
            vc.coupon = smCoupons[indexPath.row]
            vc.isFromWallet = true
            vc.isSMCoupon = true
            self.navigationController?.pushViewController(vc, animated: true)

        }  else {
            // Do nothing
        }
    }

    public func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
         if (section == 0) {
            if (self.unifiedCoupons.count > 0) {
                let view = UIView(frame: CGRect(x: 0, y: 0, width: tableView.frame.width, height: 70))
                 view.backgroundColor =  .clear

                let titleLabel = UILabel(frame: CGRect(x: 16, y: 25, width: view.frame.width - 32, height: 25))
                titleLabel.font = UIFont(name: "BTCosmo-Bold", size: 17)
//                titleLabel.textColor = UIColor(red: 0.13, green: 0.13, blue: 0.13, alpha: 1.00)
                titleLabel.textColor = UIColor(rgb: 0x212121)
                titleLabel.text = "Ενιαία κουπόνια"

                view.addSubview(titleLabel)
                return view
            } else {
                return nil
            }

         } else if (section == 1) {
            if (self.smCoupons.count > 0) {
                let headerView = UIView()
                headerView.backgroundColor = .clear
                
                // Create the title label (Κουπόνια)
                let titleLabel = UILabel()
                titleLabel.text = "Κουπόνια"
                titleLabel.font = UIFont(name: "BTCosmo-Bold", size: 17)
                
                // Create the select-all label (Επιλογή όλων)
                let selectAllLabel = UILabel()
                selectAllLabel.text = "Επιλογή όλων"
                selectAllLabel.font = UIFont(name: "PeridotPE-SBold", size: 17)
                
                // Create a UIImageView for the circle image
                circleImageView = UIImageView()
//                let circleImage = UIImage(named: "circle_unchecked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil)
                
                // Update the image based on the new state
                if (isSelectAllActive) {
                    circleImageView.image = UIImage(named: "circle_checked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil) // Selected image
                } else {
                    circleImageView.image = UIImage(named: "circle_unchecked", in: MyEmptyClass.resourceBundle(), compatibleWith: nil) // Unselected image
                }
//                circleImageView.image = circleImage
                circleImageView.contentMode = .scaleAspectFit
                circleImageView.translatesAutoresizingMaskIntoConstraints = false
                
                // Set size for the imageView
                circleImageView.widthAnchor.constraint(equalToConstant: 30).isActive = true
                circleImageView.heightAnchor.constraint(equalToConstant: 30).isActive = true
                
                // Create a transparent UIButton on top of the image
                let selectAllButton = UIButton(type: .custom)
                selectAllButton.backgroundColor = .clear // Keep it transparent
                selectAllButton.addTarget(self, action: #selector(selectAllTapped), for: .touchUpInside)
                selectAllButton.translatesAutoresizingMaskIntoConstraints = false
                
                // Set the button size to match the image size
                selectAllButton.widthAnchor.constraint(equalToConstant: 30).isActive = true
                selectAllButton.heightAnchor.constraint(equalToConstant: 30).isActive = true
                
                // Create a horizontal stack view to align the title, label, and image
                let mainStackView = UIStackView(arrangedSubviews: [titleLabel, selectAllLabel, circleImageView])
                mainStackView.axis = .horizontal
                mainStackView.alignment = .center // Centers them vertically
                mainStackView.spacing = 10
                
                // Add the stack view to the header view
                headerView.addSubview(mainStackView)
                headerView.addSubview(selectAllButton) // Add the button separately on top of the image view
                
                // Set constraints for stack view
                mainStackView.translatesAutoresizingMaskIntoConstraints = false
                mainStackView.leadingAnchor.constraint(equalTo: headerView.leadingAnchor, constant: 16).isActive = true
                mainStackView.trailingAnchor.constraint(equalTo: headerView.trailingAnchor, constant: -16).isActive = true
                mainStackView.topAnchor.constraint(equalTo: headerView.topAnchor, constant: 8).isActive = true
                mainStackView.bottomAnchor.constraint(equalTo: headerView.bottomAnchor, constant: -8).isActive = true
                
                // Set button position on top of the imageView
                selectAllButton.centerXAnchor.constraint(equalTo: circleImageView.centerXAnchor).isActive = true
                selectAllButton.centerYAnchor.constraint(equalTo: circleImageView.centerYAnchor).isActive = true
                
                return headerView

            } else {
                return nil
            }

         } else {
            return nil
         }
    }

    public func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
        if (section == 0) {
            if (self.unifiedCoupons.count > 0) {
                return 70.0
            } else {
                return 0.0
            }

        } else if (section == 1) {
            if (self.smCoupons.count > 0) {
                return 70.0
            } else {
                return 0.0
            }

        } else {
            return 0.0
        }
    }
    
    public func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
//        return CGFloat.leastNormalMagnitude
        return 0.0
    }

    public func tableView(_ tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
        return nil
    }
    
}