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//
//  LibraryDetailView.swift
//  Jel
//
//  Created by zerocool on 12/22/23.
//

import SwiftUI
import JellyfinKit

struct LibraryDetailView: View {
  @EnvironmentObject var jellyfinClient: JellyfinClientController
  @StateObject var authState: AuthStateController = AuthStateController.shared
  
  @State var library: BaseItemDto
  
  @State var items: [BaseItemDto]? = []
  
  @State var loading: Bool = true
  
  
  @State var searchText: String = ""
  @State var searchResultHints: SearchHintResult?
  @State var searchResultItems: [BaseItemDto]?
  let columns = [
    GridItem(.adaptive(minimum: 150))
  ]
  var body: some View {
    if loading {
      ProgressView()
        .progressViewStyle(.circular)
    } else {
      EmptyView()
    }
    ScrollView {
      LazyVGrid(columns: columns) {
        if !searchText.isEmpty {
          ForEach(searchResultItems ?? []) {item in
            NavigationLink {
              ItemView(item: item)
            } label: {
              LibraryIconView(library: item, imageType: "Primary", width: 170)
                .padding()
            }
            .buttonStyle(PlainButtonStyle())
          }
        } else {
          ForEach(items ?? []) {item in
            NavigationLink {
              ItemView(item: item)
            } label: {
              LibraryIconView(library: item, imageType: "Primary", width: 170)
                .padding()
            }
            .buttonStyle(PlainButtonStyle())
          }
        }
      }
    }
    .if(!loading) {view in
      view.searchable(text: $searchText)
      .onChange(of: searchText) {
        Task {
          let parameters = Paths.GetParameters(
            userID: AuthStateController.shared.userId,
            searchTerm: searchText.lowercased(),
            parentID: library.id
          )
          searchResultHints = await jellyfinClient.search(parameters: parameters)
          
          searchResultItems = items?.filter { item in
            for hint in searchResultHints?.searchHints ?? [] {
              if hint.name == item.name {
                return true
              }
            }
            return false
          }
        }
      }
    }
    .navigationTitle(library.name ?? "Unknown")
    .onAppear {
      Task {
        let params = Paths.GetItemsParameters(userID: authState.userId, parentID: library.id)
        let request = Paths.getItems(parameters: params)
        
        do {
          let res = try await jellyfinClient.send(request)
          items = res.value.items
          items?.sort(by: {$0.name?.lowercased() ?? "" < $1.name?.lowercased() ?? ""})
          loading = false
        } catch {
        }
      }
    }
  }
}

//#Preview {
//  LibraryDetailView(library: BaseItemDto())
//}