import AppAccount
import DesignSystem
import Env
import Models
import Network
import NukeUI
import SwiftUI
import UserNotifications

struct PushNotificationsView: View {
  @EnvironmentObject private var theme: Theme
  @EnvironmentObject private var appAccountsManager: AppAccountsManager
  @EnvironmentObject private var pushNotifications: PushNotificationsService

  @StateObject public var subscription: PushNotificationSubscriptionSettings

  var body: some View {
    Form {
      Section {
        Toggle(isOn: .init(get: {
          subscription.isEnabled
        }, set: { newValue in
          subscription.isEnabled = newValue
          if newValue {
            updateSubscription()
          } else {
            deleteSubscription()
          }
        })) {
          Text("settings.push.main-toggle")
        }
      } footer: {
        Text("settings.push.main-toggle.description")
      }
      .listRowBackground(theme.primaryBackgroundColor)
        
      if subscription.isEnabled {
        Section {
          Toggle(isOn: .init(get: {
            subscription.isMentionNotificationEnabled
          }, set: { newValue in
            subscription.isMentionNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.mentions", systemImage: "at")
          }
          Toggle(isOn: .init(get: {
            subscription.isFollowNotificationEnabled
          }, set: { newValue in
            subscription.isFollowNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.follows", systemImage: "person.badge.plus")
          }
          Toggle(isOn: .init(get: {
            subscription.isFavoriteNotificationEnabled
          }, set: { newValue in
            subscription.isFavoriteNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.favorites", systemImage: "star")
          }
          Toggle(isOn: .init(get: {
            subscription.isReblogNotificationEnabled
          }, set: { newValue in
            subscription.isReblogNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.boosts", systemImage: "arrow.left.arrow.right.circle")
          }
          Toggle(isOn: .init(get: {
            subscription.isPollNotificationEnabled
          }, set: { newValue in
            subscription.isPollNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.polls", systemImage: "chart.bar")
          }
          Toggle(isOn: .init(get: {
            subscription.isNewPostsNotificationEnabled
          }, set: { newValue in
            subscription.isNewPostsNotificationEnabled = newValue
            updateSubscription()
          })) {
            Label("settings.push.new-posts", systemImage: "bubble.right")
          }
        }
        .listRowBackground(theme.primaryBackgroundColor)
      }
    }
    .navigationTitle("settings.push.navigation-title")
    .scrollContentBackground(.hidden)
    .background(theme.secondaryBackgroundColor)
    .task {
      await subscription.fetchSubscription()
    }
  }

  private func updateSubscription() {
    Task {
      await subscription.updateSubscription(forceCreate: true)
    }
  }
  
  private func deleteSubscription() {
    Task {
      await subscription.deleteSubscription()
    }
  }
}