//
//  SignOutViewModel.swift
//  SodaLive
//
//  Created by klaus on 2023/08/10.
//

import Foundation
import Combine

final class SignOutViewModel: ObservableObject {
    
    private let repository = UserRepository()
    private var subscription = Set<AnyCancellable>()
    
    let reasons = I18n.Settings.SignOut.reasons
    
    @Published var reasonSelectedIndex = -1
    @Published var reason = ""
    @Published var password = ""
    
    @Published var errorMessage = ""
    @Published var isShowPopup = false
    @Published var isLoading = false
    
    func signOut() {
        if validate() {
            isLoading = true
            let reason = reasonSelectedIndex == reasons.count - 1 ? self.reason : reasons[reasonSelectedIndex]
            repository.signOut(reason: reason, password: password.trimmingCharacters(in: .whitespacesAndNewlines))
                .sink { result in
                    switch result {
                    case .finished:
                        DEBUG_LOG("finish")
                    case .failure(let error):
                        ERROR_LOG(error.localizedDescription)
                    }
                } receiveValue: { [unowned self] response in
                    self.isLoading = false
                    let responseData = response.data
                    
                    do {
                        let jsonDecoder = JSONDecoder()
                        let decoded = try jsonDecoder.decode(ApiResponseWithoutData.self, from: responseData)
                        
                        if decoded.success {
                            UserDefaults.reset()
                            AppState.shared.isRestartApp = true
                            AppState.shared.setAppStep(step: .splash)
                        } else {
                            if let message = decoded.message {
                                self.errorMessage = message
                            } else {
                                self.errorMessage = I18n.Common.commonError
                            }
                            
                            self.isShowPopup = true
                        }
                    } catch {
                        self.errorMessage = I18n.Common.commonError
                        self.isShowPopup = true
                    }
                }
                .store(in: &subscription)
        }
    }
    
    private func validate() -> Bool {
        if reasonSelectedIndex < 0 || (reasonSelectedIndex == reasons.count - 1 && self.reason.trimmingCharacters(in: .whitespaces).isEmpty) {
            errorMessage = I18n.Settings.SignOut.selectReasonRequired
            isShowPopup = true
            return false
        }
        
        return true
    }
}