//
//  ExploreTableViewController.swift
//  Gallerink
//
//  Created by Denis Lunyov on 1/20/17.
//  Copyright © 2017 Denis Lunyov. All rights reserved.
//

import UIKit
import Crashlytics

class ExploreTableViewController: UITableViewController, UICollectionViewDelegate, UICollectionViewDataSource, UISearchBarDelegate, UISearchDisplayDelegate, UISearchControllerDelegate {

    @IBOutlet weak var recentTitleLabel: UILabel!
    @IBOutlet weak var recentAllButton: UIButton!
    @IBOutlet weak var blockedUsersButton: UIButton!
    @IBOutlet weak var recentCollectionView: UICollectionView!
    @IBOutlet weak var recentPlaceholder: UIView!
    @IBOutlet weak var recentPlaceholderLabel: UILabel!
    
    @IBOutlet weak var stylesTitleLabel: UILabel!
    @IBOutlet weak var stylesAllButton: UIButton!
    @IBOutlet weak var stylesCollectionView: UICollectionView!
    @IBOutlet weak var categoriesTitleLabel: UILabel!
    @IBOutlet weak var categoriesAllButton: UIButton!
    @IBOutlet weak var categoriesCollectionView: UICollectionView!
    @IBOutlet weak var followingTitleLabel: UILabel!
    @IBOutlet weak var followingAllButton: UIButton!
    @IBOutlet weak var followingFindButton: UIButton!
    @IBOutlet weak var followingCollectionView: UICollectionView!
    @IBOutlet weak var followingPlaceholder: UIView!
    @IBOutlet weak var followingPlaceholderLabel: UILabel!
    
    let stylesArray = [9,11,8,2,3,10]
    let categoriesArray = [11,5,10,6]
    
    var recentPostsArray: Array<PostModel>?
    var followingPostsArray: Array<PostModel>?
    
    var searchBar = UISearchBar()
    var searchController: UISearchController!
    
    var cellsCount: Int = 0
    let spinner = UIActivityIndicatorView()
    
    var recentIsDownloaded: Bool = false
    var followingIsDownloaded: Bool = false {
        didSet {
            if (recentIsDownloaded == true) || (followingIsDownloaded == true) {
                stopActivityIndicator()
            }
        }
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        UIApplication.shared.statusBarStyle = .lightContent
        
        self.title = NSLocalizedString("exploreLabel", comment: "")
        
        self.refreshControl?.tintColor = UIColor(red: (222/255), green: (222/255), blue: (222/255), alpha: 1)
        self.refreshControl?.backgroundColor = UIColor.white
        self.refreshControl?.addTarget(self, action: #selector(refresh), for: UIControlEvents.valueChanged)
        
        // Recent Cell
        recentTitleLabel.text = NSLocalizedString("recentLabel", comment: "")
        recentTitleLabel.text = recentTitleLabel.text?.uppercased()
        recentAllButton.setTitle(NSLocalizedString("allButton", comment: ""), for: UIControlState.normal)
        blockedUsersButton.setTitle(NSLocalizedString("blockedUsersLabel2", comment: ""), for: UIControlState.normal)
        recentPlaceholderLabel.textColor = UIColor.greyLabel()
        recentPlaceholderLabel.text = NSLocalizedString("blockedAllUsers", comment: "")
        self.recentCollectionView.register(UINib(nibName: "ImageCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "ImageCollectionViewCell")
        recentCollectionView.delegate = self
        
        // Styles Cell
        stylesTitleLabel.text = NSLocalizedString("stylesLabel", comment: "")
        stylesTitleLabel.text = stylesTitleLabel.text?.uppercased()
        stylesAllButton.setTitle(NSLocalizedString("allButton", comment: ""), for: UIControlState.normal)
        self.stylesCollectionView.register(UINib(nibName: "StylesSmallCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "StylesSmallCollectionViewCell")
        stylesCollectionView.delegate = self
        
        // Categories Cell
        categoriesTitleLabel.text = NSLocalizedString("categoriesLabel", comment: "")
        categoriesTitleLabel.text = categoriesTitleLabel.text?.uppercased()
        categoriesAllButton.setTitle(NSLocalizedString("allButton", comment: ""), for: UIControlState.normal)
        self.categoriesCollectionView.register(UINib(nibName: "CategoriesSmallCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "CategoriesSmallCollectionViewCell")
        categoriesCollectionView.delegate = self
        
        // Following Cell
        followingTitleLabel.text = NSLocalizedString("followingLabel", comment: "")
        followingTitleLabel.text = followingTitleLabel.text?.uppercased()
        followingAllButton.setTitle(NSLocalizedString("allButton", comment: ""), for: UIControlState.normal)
        followingFindButton.setTitle(NSLocalizedString("findFriendsLabel", comment: ""), for: UIControlState.normal)
        followingPlaceholderLabel.textColor = UIColor.greyLabel()
        followingPlaceholderLabel.text = NSLocalizedString("findLabel", comment: "")
        self.followingCollectionView.register(UINib(nibName: "ImageCollectionViewCell", bundle: nil), forCellWithReuseIdentifier: "ImageCollectionViewCell")
        followingCollectionView.delegate = self
        
        activityIndicator(downloadPosts())
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    func refresh(sender:AnyObject) {
        PostApiClient().getRecentPosts(limit: 6, offset: 0, success: { (recentPosts: Array<PostModel>) in
            self.recentPostsArray = recentPosts
            
            if self.recentPostsArray?.count == 0 {
                self.recentAllButton.isHidden = true
                self.recentPlaceholder.isHidden = false
                self.blockedUsersButton.isHidden = false
            } else {
                self.recentAllButton.isHidden = false
                self.recentPlaceholder.isHidden = true
                self.blockedUsersButton.isHidden = true
            }
            
            PostApiClient().getFollowingPosts(limit: 6, offset: 0, success: { (followingPosts: Array<PostModel>) in
                self.followingPostsArray = followingPosts
                self.followingIsDownloaded = true
                self.recentIsDownloaded = true
                
                if self.followingPostsArray?.count == 0 {
                    self.followingAllButton.isHidden = true
                    self.followingPlaceholder.isHidden = false
                    self.followingFindButton.isHidden = false
                } else {
                    self.followingAllButton.isHidden = false
                    self.followingPlaceholder.isHidden = true
                    self.followingFindButton.isHidden = true
                }
                
                self.tableView.reloadData()
                self.recentCollectionView.reloadData()
                self.followingCollectionView.reloadData()
                self.refreshControl?.endRefreshing()
            }, failure: { (Void) in
                self.failureAlert()
            })
        }, failure: { (Void) in
            self.failureAlert()
        })
    }
    
    // MARK: - Collection view data source
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if collectionView.tag == 1 {
            return recentPostsArray!.count
        } else if collectionView.tag == 2 {
            return 6
        } else if collectionView.tag == 3 {
            return 4
        } else if collectionView.tag == 4 {
            return followingPostsArray!.count
        }
        return 0
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        if collectionView.tag == 1 {
            let cell: ImageCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageCollectionViewCell", for: indexPath) as! ImageCollectionViewCell
            let row = (indexPath as NSIndexPath).row
            if recentPostsArray!.count != 0 {
                cell.postUuid = self.recentPostsArray![row].postUuid
                cell.imageView.kf.setImage(with: URL(string: "\(self.recentPostsArray![row].postImageUuid!)"))
            }
            return cell
        } else if collectionView.tag == 2 {
            let cell: StylesSmallCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "StylesSmallCollectionViewCell", for: indexPath) as! StylesSmallCollectionViewCell
            let row = (indexPath as NSIndexPath).row
            cell.styleImage.image = StylesAndCategoriesHelper.getStyle(style: stylesArray[row]).image
            cell.styleTitle.text = StylesAndCategoriesHelper.getStyle(style: stylesArray[row]).title
            return cell
        } else if collectionView.tag == 3 {
            let cell: CategoriesSmallCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "CategoriesSmallCollectionViewCell", for: indexPath) as! CategoriesSmallCollectionViewCell
            let row = (indexPath as NSIndexPath).row
            cell.categoryImage.image = StylesAndCategoriesHelper.getCategory(category: categoriesArray[row]).image
            cell.categoryTitle.text = StylesAndCategoriesHelper.getCategory(category: categoriesArray[row]).title
            return cell
        } else {
            let cell: ImageCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageCollectionViewCell", for: indexPath) as! ImageCollectionViewCell
            let row = (indexPath as NSIndexPath).row
            if followingPostsArray!.count != 0 {
                cell.postUuid = self.followingPostsArray![row].postUuid
                cell.imageView.kf.setImage(with: URL(string: "\(self.followingPostsArray![row].postImageUuid!)"))
            }
            return cell
        }
    }
    
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        if collectionView.tag == 1 {
            let row = (indexPath as NSIndexPath).row
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let detailsViewController = storyboard.instantiateViewController(withIdentifier: "ExplorePostsDetailsViewController") as! ExplorePostsDetailsViewController
            detailsViewController.requestType = 1
            detailsViewController.offset = row
            self.navigationController?.pushViewController(detailsViewController, animated: true)
        } else if collectionView.tag == 2 {
            let row = (indexPath as NSIndexPath).row
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let styleViewController = storyboard.instantiateViewController(withIdentifier: "StyleViewController") as! StyleViewController
            styleViewController.style = stylesArray[row]
            self.navigationController?.pushViewController(styleViewController, animated: true)
        } else if collectionView.tag == 3 {
            let row = (indexPath as NSIndexPath).row
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let categoryViewController = storyboard.instantiateViewController(withIdentifier: "CategoryViewController") as! CategoryViewController
            categoryViewController.category = categoriesArray[row]
            self.navigationController?.pushViewController(categoryViewController, animated: true)
        } else {
            let row = (indexPath as NSIndexPath).row
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let detailsViewController = storyboard.instantiateViewController(withIdentifier: "ExplorePostsDetailsViewController") as! ExplorePostsDetailsViewController
            detailsViewController.requestType = 4
            detailsViewController.offset = row
            self.navigationController?.pushViewController(detailsViewController, animated: true)
        }
    }
    
    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return cellsCount
    }
    
    override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        if indexPath.row == 0 {
            return 172
        }
        if indexPath.row == 1 {
            return 142
        }
        if indexPath.row == 2 {
            return 172
        }
        if indexPath.row == 3 {
            return 172
        }
        return 0
    }
    
    // MARK: - View buttons actions
    
    @IBAction func recentAllButtonDidTap(_ sender: Any) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "RecentViewController")
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func blockedUsersButtonDidTap(_ sender: Any) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "BlockedUsersViewController")
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    
    @IBAction func stylesAllButtonDidTap(_ sender: Any) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "StylesViewController")
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func categoriesAllButtonDidTap(_ sender: Any) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "CategoriesViewController")
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func followingAllButtonDidTap(_ sender: Any) {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let vc = storyboard.instantiateViewController(withIdentifier: "FollowingViewController")
        self.navigationController?.pushViewController(vc, animated: true)
    }
    
    @IBAction func followingFindButtonDidTap(_ sender: Any) {
        showSearchBar()
    }
    
    @IBAction func searchButtonDidTap(_ sender: AnyObject) {
        showSearchBar()
    }
    
    func showSearchBar() {
        Answers.logSearch(withQuery: "mobile analytics",
                          customAttributes: [:])
        
        // Result Table
        let searchResultController = storyboard!.instantiateViewController(withIdentifier: "SearchResultTableViewController") as! SearchResultTableViewController
        searchController = UISearchController(searchResultsController: searchResultController)
        searchController.searchResultsUpdater = searchResultController

        // Search Controller
        searchController.hidesNavigationBarDuringPresentation = false
        searchController.searchBar.barTintColor = UIColor.panelsColor()
        searchController.searchBar.tintColor = UIColor.mainColor()
        searchController.searchBar.isTranslucent = false
        
        let textField = searchController.searchBar.value(forKey: "searchField") as! UITextField
        textField.backgroundColor = UIColor(red: 30/255, green: 36/255, blue: 51/255, alpha: 1)
        textField.textColor = UIColor.white
        
        self.searchController.searchBar.delegate = self
        present(searchController, animated: true, completion: nil)
        searchController.delegate = self
        
        // Hide Tab Bar
        UIView.animate(withDuration: 1) {
            self.tabBarController?.tabBar.alpha = 0.0
        }
        
        searchResultController.selectedProfile = { profileUuid in
            UIView.animate(withDuration: 0.3) {
                self.tabBarController?.tabBar.alpha = 1.0
            }
            self.dismiss(animated: true, completion: nil)
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let userProfileTableViewController = storyboard.instantiateViewController(withIdentifier: "UserProfileTableViewController") as! UserProfileTableViewController
            userProfileTableViewController.profileUuid = profileUuid
            self.navigationController?.pushViewController(userProfileTableViewController, animated: true)
        }
    }
    
    func willDismissSearchController(_ searchController: UISearchController) {
        UIView.animate(withDuration: 0.3) {
            self.tabBarController?.tabBar.alpha = 1.0
        }
    }
    
    func didDismissSearchController(_ searchController: UISearchController) {
        UIView.animate(withDuration: 0.3) {
            self.tabBarController?.tabBar.alpha = 1.0
        }
    }
    
    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        UIView.animate(withDuration: 0.3) {
            self.tabBarController?.tabBar.alpha = 1.0
        }
    }
    
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        let searchResultTableViewController = searchController.searchResultsController as! SearchResultTableViewController
        searchResultTableViewController.requestString = searchText
    }
    
    func activityIndicator() {
        
        let width: CGFloat = 30
        let height: CGFloat = 30
        let x = (self.view.frame.width / 2) - (width / 2)
        let y = (self.view.frame.height / 2) - (height / 2) - (self.tabBarController?.tabBar.frame.height)! - 10
        
        self.spinner.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.gray
        self.spinner.frame = CGRect(x: x, y: y, width: 30, height: 30)
        self.view.addSubview(self.spinner)
        self.spinner.startAnimating()
        
        tableView.isScrollEnabled = false
    }
    
    func stopActivityIndicator() {
        
        self.spinner.stopAnimating()
        self.spinner.hidesWhenStopped = true
        
        cellsCount = 4
        
        tableView.reloadData()
        tableView.isScrollEnabled = true
    }
    
    func downloadPosts() {
        PostApiClient().getRecentPosts(limit: 6, offset: 0, success: { (recentPosts: Array<PostModel>) in
            self.recentPostsArray = recentPosts
            
            if self.recentPostsArray?.count == 0 {
                self.recentAllButton.isHidden = true
                self.recentPlaceholder.isHidden = false
                self.blockedUsersButton.isHidden = false
            } else {
                self.recentAllButton.isHidden = false
                self.recentPlaceholder.isHidden = true
                self.blockedUsersButton.isHidden = true
            }
            
            PostApiClient().getFollowingPosts(limit: 6, offset: 0, success: { (followingPosts: Array<PostModel>) in
                self.followingPostsArray = followingPosts
                self.followingIsDownloaded = true
                self.recentIsDownloaded = true
                
                if self.followingPostsArray?.count == 0 {
                    self.followingAllButton.isHidden = true
                    self.followingPlaceholder.isHidden = false
                    self.followingFindButton.isHidden = false
                } else {
                    self.followingAllButton.isHidden = false
                    self.followingPlaceholder.isHidden = true
                    self.followingFindButton.isHidden = true
                }
                
                self.tableView.reloadData()
            }, failure: { (Void) in
                self.failureAlert()
            })
        }, failure: { (Void) in
            self.failureAlert()
        })
    }
    
    func failureAlert() {
        let alertController = UIAlertController(title: NSLocalizedString("errorLabel", comment: ""), message: NSLocalizedString("serverError", comment: ""), preferredStyle: .alert)
        let OKAction = UIAlertAction(title: "OK", style: .default) { (action) in }
        alertController.addAction(OKAction)
        self.present(alertController, animated: true)
    }
}