//
// 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 Foundation
import Observation

/// Loads the own account's status for the banners that advertise it.
/// Nothing is fetched until ``load()`` is called, so the settings screen decides when.
@Observable
final class HealthChatAccountStatusLoader {
    private(set) var status: HealthChatAccountStatus = .unknown
    
    @ObservationIgnored private let apiService: HealthChatAPIServiceProtocol?
    
    /// The load in flight — await this in tests before asserting.
    @ObservationIgnored @CancellableTask private(set) var loadingTask: Task<Void, Never>?
    
    init(apiService: HealthChatAPIServiceProtocol) {
        self.apiService = apiService
    }
    
    /// Creates a loader with a fixed status, for previews.
    init(status: HealthChatAccountStatus) {
        self.status = status
        apiService = nil
    }
    
    /// Fetches the status again, replacing a load still in flight.
    func load() {
        guard let apiService else { return }
        loadingTask = Task { await load(from: apiService) }
    }
    
    // MARK: - Private
    
    private func load(from apiService: HealthChatAPIServiceProtocol) async {
        // Every failure below leaves the status untouched: a banner must not report an error.
        guard case let .success(profile) = await apiService.ownProfile(), !Task.isCancelled else {
            return
        }
        
        guard profile.isApproved else {
            status = .pendingApproval
            return
        }
        
        guard case let .success(completeness) = await apiService.profileCompleteness(), !Task.isCancelled else {
            return
        }
        
        // The server words the hint itself; without one there is nothing to show.
        guard !completeness.isComplete, let message = completeness.message else {
            status = .ok
            return
        }
        
        status = .incompleteProfile(message: message)
    }
}