//
//  CashExchangeRequestsViewController.swift
//  PayCash
//
//  Created by Saveliy Stavitsky on 7/21/21.
//  Copyright © 2021 AM. All rights reserved.
//

import UIKit
import class Resolver.Resolver

class CashExchangeRequestsViewController: UIViewController {

    @IBOutlet var segmentedControl: UISegmentedControl!
    @IBOutlet private weak var requestsTableView: UITableView!

    var requestsService: CCCP.Service.ExchangeRequests { Resolver.resolve() }

    private lazy var requestsEmptyView: CommonViewEmpty = {
        CommonViewEmpty(
            text: L10n.Cccp.Main.Requests.Empty.description,
            image: Asset.cccpRequestsEmpty1.image)
    }()

    private let refresh = UIRefreshControl()

    override func viewDidLoad() {
        super.viewDidLoad()

        navigationItem.title = L10n.Cash.ExchangeRequests.headerTitle
        navigationItem.leftBarButtonItem = .pop(self)

        segmentedControl.setTitle(L10n.Cccp.Main.Segment.myOrders, forSegmentAt: 0)
        segmentedControl.setTitle(L10n.Cccp.Main.Segment.debt, forSegmentAt: 1)

        refresh.addTarget(self, action: #selector(refreshViewApearance), for: .valueChanged)
        requestsTableView.addSubview(refresh)

        requestsTableView.allowsSelection = false
        requestsTableView.showsVerticalScrollIndicator = false
        requestsTableView.separatorStyle = .none
        requestsTableView.register(cell: CCCPCellExchangeRequest.self)

        Notification.subscribe(name: .didUpdateCryptocashExchangeRequests) {[weak self] _ in
            DispatchQueue.main.async {
                self?.refresh.endRefreshing()
                self?.requestsTableView.reloadData()
//                self?.requestsEmptyView.alpha = ((self?.requests.isEmpty ?? true) ? 1 : 0)
            }
        }

        self.setupRequestsEmptyView()
    }

    private func setupRequestsEmptyView() {
        requestsEmptyView.frame = CGRect(x: 0, y: 50, width: requestsTableView.frame.width,
                                 height: requestsTableView.frame.height - 50)
        requestsEmptyView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        requestsEmptyView.translatesAutoresizingMaskIntoConstraints = true
        requestsEmptyView.alpha = 0
        requestsTableView.addSubview(requestsEmptyView)
    }

    @objc func refreshViewApearance() {
        requestsService.fetch()
    }

    @IBAction func segmentChange(_ sender: Any) {
        requestsTableView.reloadData()
        self.requestsEmptyView.alpha = (self.requests.isEmpty ? 1 : 0)
    }

    @IBAction func onCreate(_: AnyObject?) {
        let createRequestViewController = StoryboardScene.Cccp.cccpControllerCreateExchangeRequest.instantiate()
        navigationController?.pushViewController(createRequestViewController, animated: true)
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        Accounts().isLocked = true

        if ((UIApplication.shared.windows.first!.rootViewController as? MainController)?.barNav.items?.count ?? 0) > 1 {
            (UIApplication.shared.windows.first!.rootViewController as? MainController)?.barNav.popItem(animated: true)
        }

        refreshViewApearance()
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        Accounts().isLocked = false
    }

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

extension CashExchangeRequestsViewController: UITableViewDelegate, UITableViewDataSource {

    var requests: [CCCP.Model.ExchangeRequest] {
        segmentedControl.selectedSegmentIndex == 0 ? (requestsService.requests) : requestsService.debts
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        let requestsTableViewCount = self.requests.count
        self.requestsEmptyView.alpha = (requestsTableViewCount == 0) ? 1 : 0
        return requestsTableViewCount
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(CCCPCellExchangeRequest.self, indexPath: indexPath)
        cell.tokens = Wallet.Service.Tokens.shared.balances.collection
        cell.setup(request: requests[indexPath.row])
        cell.parent = self
        return cell
    }
}