import Foundation
import UserNotifications
import UIKit

/// Surfaces WS events as local notifications while the app has an active
/// session (foregrounded or background-grace). APNs push lands at v1.1.
@MainActor
enum NotificationCenterBridge {
    static func requestAuthorizationIfNeeded() async {
        let center = UNUserNotificationCenter.current()
        let current = await center.notificationSettings()
        guard current.authorizationStatus == .notDetermined else { return }
        _ = try? await center.requestAuthorization(options: [.alert, .badge, .sound])
    }

    static func notifyTaskStatus(taskId: String, taskName: String, status: String) {
        let status = status.lowercased()
        let (title, body): (String?, String?) = {
            switch status {
            case "done", "completed":
                return ("TASK COMPLETED", "\(taskName) is done.")
            case "failed", "error":
                return ("TASK FAILED", "\(taskName) stopped with an error.")
            case "blocked":
                return ("TASK BLOCKED", "\(taskName) needs your input.")
            default:
                return (nil, nil)
            }
        }()
        guard let title, let body else { return }

        let content = UNMutableNotificationContent()
        content.title = title
        content.body = body
        content.sound = .default
        content.userInfo = ["deepLink": "makima://task/\(taskId)"]

        let request = UNNotificationRequest(
            identifier: "task-\(taskId)-\(status)",
            content: content,
            trigger: nil
        )
        UNUserNotificationCenter.current().add(request)
    }

    static func notifyDirectiveQuestion(directiveId: String, title: String) {
        let content = UNMutableNotificationContent()
        content.title = "DIRECTIVE QUESTION"
        content.body = "\(title) needs your answer."
        content.sound = .default
        content.userInfo = ["deepLink": "makima://directive/\(directiveId)"]

        let request = UNNotificationRequest(
            identifier: "directive-\(directiveId)",
            content: content,
            trigger: nil
        )
        UNUserNotificationCenter.current().add(request)
    }
}