import DesignSystem
import EmojiText
import Env
import Models
import Status
import SwiftUI

struct NotificationRowView: View {
  @EnvironmentObject private var theme: Theme
  @EnvironmentObject private var routerPath: RouterPath
  @Environment(\.redactionReasons) private var reasons

  let notification: Models.Notification

  var body: some View {
    if let type = notification.supportedType {
      HStack(alignment: .top, spacing: 8) {
        makeAvatarView(type: type)
        VStack(alignment: .leading, spacing: 2) {
          makeMainLabel(type: type)
          makeContent(type: type)
        }
      }
    } else {
      EmptyView()
    }
  }

  private func makeAvatarView(type: Models.Notification.NotificationType) -> some View {
    ZStack(alignment: .topLeading) {
      AvatarView(url: notification.account.avatar)
      ZStack(alignment: .center) {
        Circle()
          .strokeBorder(Color.white, lineWidth: 1)
          .background(Circle().foregroundColor(theme.tintColor))
          .frame(width: 24, height: 24)

        Image(systemName: type.iconName())
          .resizable()
          .frame(width: 12, height: 12)
          .foregroundColor(.white)
      }
      .offset(x: -14, y: -4)
    }
    .contentShape(Rectangle())
    .onTapGesture {
      routerPath.navigate(to: .accountDetailWithAccount(account: notification.account))
    }
  }

  private func makeMainLabel(type: Models.Notification.NotificationType) -> some View {
    VStack(alignment: .leading, spacing: 0) {
      HStack(spacing: 0) {
        EmojiTextApp(notification.account.safeDisplayName.asMarkdown,
                     emojis: notification.account.emojis,
                     append: {
                       Text(" ") +
                         Text(type.label())
                         .font(.subheadline)
                         .fontWeight(.regular) +
                         Text(" ⸱ ")
                         .font(.footnote)
                         .fontWeight(.regular)
                         .foregroundColor(.gray) +
                         Text(notification.createdAt.formatted)
                         .font(.footnote)
                         .fontWeight(.regular)
                         .foregroundColor(.gray)
                     })
                     .font(.subheadline)
                     .fontWeight(.semibold)
        Spacer()
      }
    }
    .contentShape(Rectangle())
    .onTapGesture {
      routerPath.navigate(to: .accountDetailWithAccount(account: notification.account))
    }
  }

  @ViewBuilder
  private func makeContent(type: Models.Notification.NotificationType) -> some View {
    if let status = notification.status {
      HStack {
        if type == .mention {
          StatusRowView(viewModel: .init(status: status, isCompact: true, showActions: true))
        } else {
          StatusRowView(viewModel: .init(status: status, isCompact: true, showActions: false))
            .foregroundColor(.gray)
        }
        Spacer()
      }
    } else {
      Group {
        Text("@\(notification.account.acct)")
          .font(.callout)
          .foregroundColor(.gray)

        if type == .follow {
          EmojiTextApp(notification.account.note.asMarkdown,
                       emojis: notification.account.emojis)
            .lineLimit(3)
            .font(.callout)
            .foregroundColor(.gray)
            .environment(\.openURL, OpenURLAction { url in
              routerPath.handle(url: url)
            })
        }
      }
      .contentShape(Rectangle())
      .onTapGesture {
        routerPath.navigate(to: .accountDetailWithAccount(account: notification.account))
      }
    }
  }
}

struct NotificationRowView_Previews: PreviewProvider {
  static var previews: some View {
    NotificationRowView(notification: .placeholder())
  }
}