//
//  SearchViewController.swift
//  Mastodon
//
//  Created by sxiaojian on 2021/3/31.
//

import UIKit
import Combine

final class SearchViewController: UIViewController, NeedsDependency {
    
    weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
    weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
    
    var disposeBag = Set<AnyCancellable>()
    private(set) lazy var viewModel = SearchViewModel(context: context)
    
    let searchBar: UISearchBar = {
        let searchBar = UISearchBar()
        searchBar.placeholder = L10n.Scene.Search.Searchbar.placeholder
        searchBar.tintColor = Asset.Colors.buttonDefault.color
        searchBar.translatesAutoresizingMaskIntoConstraints = false
        let micImage = UIImage(systemName: "mic.fill")
        searchBar.setImage(micImage, for: .bookmark, state: .normal)
        searchBar.showsBookmarkButton = true
        return searchBar
    }()
    
    let recommendView: UICollectionView = {
        let flowLayout = UICollectionViewFlowLayout()
        flowLayout.scrollDirection = .horizontal
        let view = ControlContainableCollectionView(frame: .zero, collectionViewLayout: flowLayout)
        view.backgroundColor = .clear
        view.showsHorizontalScrollIndicator = false
        view.showsVerticalScrollIndicator = false
        view.layer.masksToBounds = false
        view.translatesAutoresizingMaskIntoConstraints = false
        return view
    }()
}

extension SearchViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        searchBar.delegate = self
        navigationItem.titleView = searchBar
        navigationItem.hidesBackButton = true
        viewModel.requestRecommendData()
    }
    
}

extension SearchViewController: UISearchBarDelegate {
    func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
        searchBar.setShowsCancelButton(true, animated: true)
    }
    
    func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
        searchBar.setShowsCancelButton(false, animated: true)
    }
    
    func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
        searchBar.setShowsCancelButton(false, animated: true)
        searchBar.text = ""
        searchBar.resignFirstResponder()
    }
    
    func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        viewModel.searchText.send(searchText)
    }
    
    func searchBarBookmarkButtonClicked(_ searchBar: UISearchBar) {
        
    }
}

extension SearchViewController {

}