//
//  MyListVM.swift
//  WOKA
//
//  Created by MacBook Pro on 13/06/24.
//

import Foundation
import Alamofire

enum CollectionSelectionMyList{
    case webSeriesCV
    case webSeriesHindiCV
    case audioBooksCV
    case karaokeCV
    case gamesCV
}

class MyListVM{
    weak var vc : MyListVC!
    var favListingData : FavouriteListingDM.ResultData?
    
    var webSeriesHindi = [FavouriteListingDM.ResultData.ShowDatum]()
    
    let refreshControl = UIRefreshControl()
    let feedbackGenerator = UIImpactFeedbackGenerator(style: .light)
    
    var selectedCollection : CollectionSelectionMyList?
    
    func initView(){
        NotificationCenter.default.addObserver(self, selector: #selector(languageChanged), name: .languageDidChange, object: nil)
        
        if AuthFunc.shareInstance.getUserType() == 3{ // handle guest
            vc.guestLoginView.isHidden = false
            vc.guestLoginStack.isHidden = false
            vc.scrollView.isHidden = true
            return
        }
        
        setupCell()
        Utilities.startProgressHUD()
        getFavouriteListing()
    }
    
    func addGradient(){
        let color1 = #colorLiteral(red: 0.6745098039, green: 0.6235294118, blue: 0.1725490196, alpha: 1)
        let color2 = #colorLiteral(red: 0.5450980392, green: 0.6745098039, blue: 0.1725490196, alpha: 1)
        
        vc.gradientView.applyGradient(colors: [color2, color1], startPoint: CGPoint(x: 0, y: 0), endPoint: CGPoint(x: 0.8, y: 0))
    }
    
    @objc func languageChanged(){
        self.reloadCollections()
    }
    
    func setupCell(){
        vc.webSeriesCV.register(UINib(nibName: K.CellIdentifier.Home.favouriteCell, bundle: nil), forCellWithReuseIdentifier: K.CellIdentifier.Home.favouriteCell)
        vc.webSeriesCV.delegate = vc.self
        vc.webSeriesCV.dataSource = vc.self
        
        vc.webSeriesHindiCV.register(UINib(nibName: K.CellIdentifier.Home.favouriteCell, bundle: nil), forCellWithReuseIdentifier: K.CellIdentifier.Home.favouriteCell)
        vc.webSeriesHindiCV.delegate = vc.self
        vc.webSeriesHindiCV.dataSource = vc.self
        
        vc.audioBooksCV.register(UINib(nibName: K.CellIdentifier.Home.favouriteCell, bundle: nil), forCellWithReuseIdentifier: K.CellIdentifier.Home.favouriteCell)
        vc.audioBooksCV.delegate = vc.self
        vc.audioBooksCV.dataSource = vc.self
        
        vc.karaokeCV.register(UINib(nibName: K.CellIdentifier.Home.favouriteCell, bundle: nil), forCellWithReuseIdentifier: K.CellIdentifier.Home.favouriteCell)
        vc.karaokeCV.delegate = vc.self
        vc.karaokeCV.dataSource = vc.self
        
        vc.gamesCV.register(UINib(nibName: K.CellIdentifier.Home.favouriteCell, bundle: nil), forCellWithReuseIdentifier: K.CellIdentifier.Home.favouriteCell)
        vc.gamesCV.delegate = vc.self
        vc.gamesCV.dataSource = vc.self
    }
    
    // MARK: - Get Favourite Listing

    func getFavouriteListing(){
        
        let headers : HTTPHeaders = ["Accept-Language" : AuthFunc.shareInstance.languageSelected == .english ? "English" : "Hindi",
                                     "access-token": AuthFunc.shareInstance.getAccessToken()]
        NetworkManager.shareInstance.apiRequest(url: APIEndPoints.Home.favourite_listing, method: .post, headers: headers) { [weak self](result : Result<BaseResponseModel<FavouriteListingDM>, NetworkManager.APIError>) in
            switch result{
            case .success(let data):
                guard let self else{return}
                switch data.success{
                case 0:
                    self.refreshControl.endRefreshing()
                    Utilities.dismissProgressHUD()
                    self.vc.toast(msg: data.message ?? "Unrecognised error" , time: 2)
                    webSeriesHindi.removeAll()
                    favListingData = nil
                    reloadCollections()
                    checkNil()
                case 1:
                    self.refreshControl.endRefreshing()
                    Utilities.dismissProgressHUD()
                    guard let data = data.data?.result else{return}
                    favListingData = nil
                    webSeriesHindi.removeAll()
                    
                    favListingData = data
                    
                    if var hindiData = favListingData?.showData{
                        
                        /*
                         Taking out the hindi series , 1-> English , 18-> Hindi
                         And the saving it to hindi series, also modify the bookmark category ids
                         */
                        webSeriesHindi = hindiData.compactMap { $0 }.filter {
                            ($0.bookmarkCategoryIDS?.components(separatedBy: ",").first == "18" || $0.bookmarkCategoryIDS?.components(separatedBy: ",").last == "18")
                        }.map { element -> FavouriteListingDM.ResultData.ShowDatum in
                            var modifiedElement = element
                            modifiedElement.bookmarkCategoryIDS = "18"
                            return modifiedElement
                        }
                        
                        if let data = favListingData?.showData{
                            var indicesToRemove = [Int]()

                            // Deleting the hindi series from main (those with category ID "18")
                            for (index, element) in data.enumerated() {
                                if let bookMarkCatID = element.bookmarkCategoryIDS?.components(separatedBy: ","){
                                    if bookMarkCatID.count > 1{ // means multiple language
                                        /*
                                         if its greater than one , its for sure we have extracted the hindi episode
                                         */
                                        hindiData[index].bookmarkCategoryIDS = "1"
                                    }else{ // means single language
                                        if bookMarkCatID.first == "18"{
                                            indicesToRemove.append(index)
                                        }
                                    }
                                }
                            }
                            
                            // Remove items in reverse order to avoid index shifting issues
                            for index in indicesToRemove.reversed() {
                                hindiData.remove(at: index)
                            }
                        }
                        
                                                
                        // Updating the showData with the filtered list
                        favListingData?.showData = hindiData
                    }
                    reloadCollections()
                    feedbackGenerator.impactOccurred()
                    checkNil()
                default:
                    break
                }
            case .failure(let error):
                guard let self else{return}
                self.refreshControl.endRefreshing()
                Utilities.dismissProgressHUD()
                checkNil()
                self.vc.toast(msg: error.localizedDescription , time: 2)
            }
        }
    }
    
    // MARK: - Like , unlike

    func likePost(postID : Int, postType : Int, index : Int , onCompletion : @escaping (Bool) -> Void){
        Utilities.startProgressHUD()
        let headers : HTTPHeaders = ["Accept-Language" : AuthFunc.shareInstance.languageSelected == .english ? "English" : "Hindi",
                                     "access-token": AuthFunc.shareInstance.getAccessToken()]
        
        let params : Parameters = ["post_id" : postID,
                                   "post_type" : postType]
        
        NetworkManager.shareInstance.apiRequest(url: APIEndPoints.Home.post_like, method: .post, parameters: params, headers: headers) { [weak self](result : Result<CommonResponseModel, NetworkManager.APIError>) in
            switch result{
            case .success(let data):
                guard let self else{return}
                switch data.success{
                case 0:
                    Utilities.dismissProgressHUD()
                    self.vc.toast(msg: data.message ?? "Unrecognised error" , time: 2)
                    onCompletion(false)
                case 1:
                    Utilities.dismissProgressHUD()
                    onCompletion(true)
                default:
                    Utilities.dismissProgressHUD()
                    onCompletion(false)
                }
            case .failure(let error):
                guard let self else{return}
                Utilities.dismissProgressHUD()
                self.vc.toast(msg: error.localizedDescription , time: 2)
                onCompletion(false)
            }
        }
    }
    
    func unlikePost(postID : Int, postType : Int , index : Int, onCompletion : @escaping (Bool) -> Void){
        Utilities.startProgressHUD()
        let headers : HTTPHeaders = ["Accept-Language" : AuthFunc.shareInstance.languageSelected == .english ? "English" : "Hindi",
                                     "access-token": AuthFunc.shareInstance.getAccessToken()]
        
        let params : Parameters = ["post_id" : postID,
                                   "post_type" : postType]
        NetworkManager.shareInstance.apiRequest(url: APIEndPoints.Home.post_unlike, method: .post, parameters: params, headers: headers) { [weak self](result : Result<BaseResponseModel<CommonResponseModel>, NetworkManager.APIError>) in
            switch result{
            case .success(let data):
                guard let self else{return}
                switch data.success{
                case 0:
                    Utilities.dismissProgressHUD()
                    self.vc.toast(msg: data.message ?? "Unrecognised error" , time: 2)
                    onCompletion(false)
                case 1:
                    Utilities.dismissProgressHUD()
                    onCompletion(true)
                default:
                    Utilities.dismissProgressHUD()
                    onCompletion(false)
                }
            case .failure(let error):
                guard let self else{return}
                Utilities.dismissProgressHUD()
                self.vc.toast(msg: error.localizedDescription , time: 2)
                onCompletion(false)
            }
        }
    }
    
    
    // MARK: - Remove Favourite

    func removeFavourite(postID : Int, postType : Int, categoryID : String, index : Int , onCompletion : @escaping (Bool) -> Void){
        Utilities.startProgressHUD()
        let headers : HTTPHeaders = ["Accept-Language" : AuthFunc.shareInstance.languageSelected == .english ? "English" : "Hindi",
                                     "access-token": AuthFunc.shareInstance.getAccessToken()]
        
        let params : Parameters = ["id" : postID,
                                   "post_type" : postType,
                                   "category_id" : categoryID]
        NetworkManager.shareInstance.apiRequest(url: APIEndPoints.Home.favourite_remove, method: .post, parameters: params, headers: headers) { [weak self](result : Result<CommonResponseModel, NetworkManager.APIError>) in
            switch result{
            case .success(let data):
                guard let self else{return}
                switch data.success{
                case 0:
                    Utilities.dismissProgressHUD()
                    self.vc.toast(msg: data.message ?? "Unrecognised error" , time: 2)
                    onCompletion(false)
                case 1:
                    Utilities.dismissProgressHUD()
                    onCompletion(true)
                default:
                    Utilities.dismissProgressHUD()
                    onCompletion(false)
                }
            case .failure(let error):
                guard let self else{return}
                Utilities.dismissProgressHUD()
                self.vc.toast(msg: error.localizedDescription , time: 2)
                onCompletion(false)
            }
        }
    }
    
    func checkNil(){
        guard let data = favListingData else{
            self.vc.noDataStack.isHidden = false
            return
        }
        if data.showData?.count == 0 && data.singKaraokeData?.count == 0 && data.gameData?.count == 0 && data.audioData?.count == 0 && webSeriesHindi.count == 0{
            self.vc.noDataStack.isHidden = false
        }else{
            self.vc.noDataStack.isHidden = true
        }
    }
    
    func reloadCollections(){
        vc.webSeriesCV.reloadData()
        vc.webSeriesHindiCV.reloadData()
        vc.audioBooksCV.reloadData()
        vc.karaokeCV.reloadData()
        vc.gamesCV.reloadData()
    }
}