import SwiftUI

enum SubscriptionDeletionConfirmation {
  static func title(for name: String) -> String {
    String(localized: "删除订阅「\(name)」及其整棵子树？")
  }

  static let actionTitle = String(localized: "删除订阅")
  static let message =
    String(localized: "将移除订阅源、固定分组与全部远端成员；若代理正走此订阅，代理会停止。此操作不可撤销。")
}

/// 「添加订阅」表单（工具栏入口）：粘贴 HTTPS 订阅地址；创建后立即首次刷新。
struct AddSubscriptionSheet: View {
  let workflow: CatalogWorkflow
  let errors: ErrorAlertPresenter
  @Environment(\.dismiss) private var dismiss

  @State private var urlString = ""

  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      Text("粘贴订阅地址（必须 HTTPS，返回 SIP-008 JSON；Content-Type 需为 application/json; charset=utf-8）。")
        .font(.callout)
        .foregroundStyle(.secondary)
      TextField("https://example.com/subscription.json", text: $urlString)
        .textFieldStyle(.roundedBorder)
      HStack {
        Spacer()
        Button("取消", role: .cancel) { dismiss() }
        Button("添加并刷新") { create() }
          .keyboardShortcut(.defaultAction)
          .disabled(urlString.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
      }
    }
    .padding(20)
    .frame(minWidth: 480)
  }

  private func create() {
    Task {
      do {
        _ = try await workflow.createSubscription(urlString: urlString)
        dismiss()
      } catch {
        errors.present(error)
      }
    }
  }
}

/// 「编辑订阅 URL」表单（保留订阅与固定分组身份）；保存后立即刷新。
/// URL 明文经显式命令读取。
struct EditSubscriptionURLSheet: View {
  let workflow: CatalogWorkflow
  let errors: ErrorAlertPresenter
  let summary: SubscriptionSummary
  @Environment(\.dismiss) private var dismiss

  @State private var urlString = ""
  @State private var loaded = false

  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      Text("编辑订阅地址。订阅身份与固定分组全部保留；新地址刷新成功前保留最后一次成功内容。")
        .font(.callout)
        .foregroundStyle(.secondary)
      TextField("https://example.com/subscription.json", text: $urlString)
        .textFieldStyle(.roundedBorder)
      HStack {
        Spacer()
        Button("取消", role: .cancel) { dismiss() }
        Button("保存并刷新") { save() }
          .keyboardShortcut(.defaultAction)
          .disabled(urlString.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty)
      }
    }
    .padding(20)
    .frame(minWidth: 480)
    .onAppear {
      guard !loaded else { return }
      loaded = true
      do {
        urlString = try workflow.subscriptionURL(for: summary.id)
      } catch {
        errors.present(error)
      }
    }
  }

  private func save() {
    Task {
      do {
        try await workflow.editSubscriptionURL(summary.id, urlString: urlString)
        dismiss()
      } catch {
        errors.present(error)
      }
    }
  }
}