//
// Copyright 2026 Novaloop AG
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
// Please see LICENSE files in the repository root for full details.
//

import Combine
import SwiftUI

typealias HealthChatInviteMemberScreenViewModelType = StateStoreViewModelV2<HealthChatInviteMemberScreenViewState, HealthChatInviteMemberScreenViewAction>

class HealthChatInviteMemberScreenViewModel: HealthChatInviteMemberScreenViewModelType, HealthChatInviteMemberScreenViewModelProtocol {
    private let apiService: HealthChatAPIServiceProtocol
    private let userIndicatorController: UserIndicatorControllerProtocol
    
    private let actionsSubject: PassthroughSubject<HealthChatInviteMemberScreenViewModelAction, Never> = .init()
    var actionsPublisher: AnyPublisher<HealthChatInviteMemberScreenViewModelAction, Never> {
        actionsSubject.eraseToAnyPublisher()
    }
    
    init(apiService: HealthChatAPIServiceProtocol,
         userIndicatorController: UserIndicatorControllerProtocol) {
        self.apiService = apiService
        self.userIndicatorController = userIndicatorController
        
        super.init(initialViewState: HealthChatInviteMemberScreenViewState(), mediaProvider: nil)
    }
    
    // MARK: - Public
    
    override func process(viewAction: HealthChatInviteMemberScreenViewAction) {
        switch viewAction {
        case .send:
            Task { await sendInvitation() }
        case .cancel:
            actionsSubject.send(.dismiss)
        }
    }
    
    // MARK: - Private
    
    private func sendInvitation() async {
        let indicatorID = "\(Self.self)-Sending"
        defer { userIndicatorController.retractIndicatorWithId(indicatorID) }
        userIndicatorController.submitIndicator(UserIndicator(id: indicatorID,
                                                              type: .modal(progress: .indeterminate, interactiveDismissDisabled: true, allowsInteraction: false),
                                                              title: L10n.commonLoading,
                                                              persistent: true),
                                                delay: .milliseconds(100))
        
        let email = state.bindings.email.trimmingCharacters(in: .whitespaces)
        let personalNote = state.bindings.personalNote.trimmingCharacters(in: .whitespacesAndNewlines)
        
        switch await apiService.inviteMember(email: email, personalNote: personalNote) {
        case .success:
            userIndicatorController.submitIndicator(UserIndicator(title: HealthChatL10n.screenInviteMemberSuccess, icon: \.check))
            actionsSubject.send(.dismiss)
        case .failure:
            state.bindings.alertInfo = .init(id: .sendFailed)
        }
    }
}