//
//  CryptoChatViewCreateChat.swift
//  Wallet
//
//  Created by Saveliy Stavitsky on 8/27/20.
//  Copyright © 2020 List. All rights reserved.
//

import UIKit
import EosioSwift
import Combine

final class CryptoChatViewCreateChat: CommonViewCustom, CommonTextFieldDelegate {

    @IBOutlet private var textField: CommonTextField!
    @IBOutlet private var submitButton: CommonButtonAction!
    
    private let usernameSubject = PassthroughSubject<String, Never>()
    lazy var succeedPublisher: AnyPublisher<String, Never> = self.usernameSubject.eraseToAnyPublisher()

    @IBAction private func onSubmit(_ : AnyObject?) {
        let username = textField.value.lowercased().trimmingCharacters(in: CharacterSet.whitespaces)
        
        guard username.count > 0,
              username != Accounts().current?.name else { return }
        
        let environment = ApplicationEnvironment.shared().current
        guard let node = environment.node,
              let url = URL(string: node) else {
            self.textField.error = L10n.CryptoChat.Chats.createTextFieldError
            return
        }
        
        EosioRpcProvider(endpoint: url, headers: environment.headers)
            .getAccount(requestParameters: EosioRpcAccountRequest(accountName: username), completion: { [weak self] in
            switch $0 {
            case .success:
                self?.usernameSubject.send(username)
            case let .failure(error):
                self?.textField.error = L10n.CryptoChat.Chats.createTextFieldError
                print(error)
            }
        })
    }

    override func setup() {
        super.setup()

        self.textField.lzTitle = L10n.CryptoChat.Chats.createTextFieldTitle
        self.textField.lzPlaceholder = L10n.CryptoChat.Chats.createTextFieldTitle
        self.textField.delegate = self
        self.submitButton.isEnabled = false
    }
    
    // MARK: - CommonTextFieldDelegate
    
    func textFieldDidSubmit(_ textField: CommonTextField) {
        self.onSubmit(nil)
    }
    
    func textFieldDidChange(_ textField: CommonTextField) {
        self.submitButton.isEnabled = !textField.value.isEmpty
        textField.error = nil
    }
}