import SwiftUI

struct SharedMember: Decodable {
  let ID: UInt64
  let Address: String
}
struct SharedPerson: Decodable, Identifiable {
  let Member: SharedMember
  let Role: String
  var id: UInt64 { Member.ID }
}
struct SharedLink: Decodable, Identifiable {
  let ID: UInt64
  let Role: String
  var id: UInt64 { self.ID }
}
struct SharingPage: Decodable {
  let People: [SharedPerson]?
  let Links: [SharedLink]?
  let NewLink: String
  let Notice: String
}
struct SheetSharing: View {
  @Bindable var model: SheetModel
  @State private var sharing: SharingPage?
  @State private var address = ""
  @State private var role = "viewer"
  @State private var linkRole = "viewer"
  var body: some View {
    Group {
      Text("People you share with can see your team’s name.").font(.callout)
      TextField("Email address", text: $address)
      Picker("Access", selection: $role) {
        ForEach(["viewer", "commenter", "editor", "owner"], id: \.self) {
          Text($0.capitalized).tag($0)
        }
      }
      Button("Grant access") {
        Task {
          await model.command("/share", ["address": address, "role": role])
          await load()
        }
      }.disabled(address.isEmpty)
      ForEach(sharing?.People ?? []) { person in
        LabeledContent(person.Member.Address, value: person.Role)
        Button("Remove access", role: .destructive) {
          Task {
            await model.command("/share/revoke", ["member": String(person.id)])
            await load()
          }
        }
      }
      Picker("Link access", selection: $linkRole) {
        Text("Viewer").tag("viewer")
        Text("Commenter").tag("commenter")
      }
      Button("Create link") {
        Task {
          do {
            sharing = try await model.form(model.base + "/share/link", ["role": linkRole])
          } catch { model.error = error.localizedDescription }
        }
      }
      if let sharing, !sharing.NewLink.isEmpty {
        Text(sharing.NewLink).textSelection(.enabled)
        ShareLink(item: sharing.NewLink)
        Text("Copy this link now. It is shown only once.").font(.caption)
      }
      ForEach(sharing?.Links ?? []) { link in
        Button("Revoke \(link.Role) link \(link.ID)", role: .destructive) {
          Task {
            await model.command("/share/link/revoke", ["link": String(link.ID)])
            await load()
          }
        }
      }
      Text(model.notice).font(.callout)
    }.task { await load() }
  }
  private func load() async {
    do { sharing = try await model.client.request(model.base + "/share") } catch {
      model.error = error.localizedDescription
    }
  }
}