import SwiftUI
import FirebaseStorage
import FirebaseFirestore
import AVFoundation
import UIKit
import FirebaseAuth

struct Phonogram: Identifiable {
    var id = UUID()
    var name: String
    var url: String
}

struct PhonogramsView: View {
    @State private var phonograms: [Phonogram] = []
    @State private var player: AVAudioPlayer?
    @State private var isUploading = false
    @State private var isAdmin = false
    @State private var showPicker = false
    
    var body: some View {
        NavigationView {
            List {
                ForEach(phonograms, id: \.id) { phonogram in
                    HStack {
                        Text(phonogram.name)
                            .onTapGesture {
                                playMP3(urlString: phonogram.url)
                            }
                    }
                }
            }
            .navigationTitle("Phonograms")
            .navigationBarItems(trailing: isAdmin ? uploadButton : nil)
            .onAppear {
                fetchPhonograms()
                checkIfAdmin() // Check if the user is an admin
            }
            .sheet(isPresented: $showPicker) {
                DocumentPicker()
            }
        }
    }
    
    private var uploadButton: some View {
        Button(action: {
            showPicker = true  // This triggers the presentation of the sheet
        }) {
            Text("Upload")
        }
    }
    
    private func fetchPhonograms() {
        let db = Firestore.firestore()
        db.collection("phonograms")
            .getDocuments { snapshot, error in
                if let error = error {
                    print("Error fetching documents: \(error)")
                } else {
                    phonograms = snapshot?.documentspactMap { doc in
                        guard let name = doc["name"] as? String,
                              let url = doc["url"] as? String else { return nil }
                        return Phonogram(name: name, url: url)
                    } ?? []
                    
                    phonograms.sort { $0.name.localizedCompare($1.name) == .orderedAscending }
                }
            }
    }
    
    private func checkIfAdmin() {
        if let user = Auth.auth().currentUser {
            // Replace with your admin email check
            isAdmin = user.email == "[email protected]"
        }
    }
    
    private func uploadMP3(fileURL: URL) {
        let storage = Storage.storage()
        let storageRef = storage.reference().child("phonograms/\(fileURL.lastPathComponent)")
        
        let metadata = StorageMetadata()
        metadata.contentType = "audio/mp3"
        
        storageRef.putFile(from: fileURL, metadata: metadata) { _, error in
            if let error = error {
                print("Error uploading file: \(error.localizedDescription)")
            } else {
                storageRef.downloadURL { url, error in
                    if let error = error {
                        print("Error getting download URL: \(error.localizedDescription)")
                    } else if let downloadURL = url {
                        savePhonogramToFirestore(fileURL: fileURL, downloadURL: downloadURL.absoluteString)
                    }
                }
            }
        }
    }
    
    
    
    private func savePhonogramToFirestore(fileURL: URL, downloadURL: String) {
        let db = Firestore.firestore()
        let phonogramData: [String: Any] = [
            "name": fileURL.lastPathComponent,
            "url": downloadURL
        ]

        db.collection("phonograms").addDocument(data: phonogramData) { error in
            if let error = error {
                print("Error saving to Firestore: \(error.localizedDescription)")
            } else {
                fetchPhonograms()  // Reload the list after saving
            }
        }
    }
    
    private func playMP3(urlString: String) {
        guard let url = URL(string: urlString) else { return }
        
        do {
            player = try AVAudioPlayer(contentsOf: url)
            player?.play()
        } catch {
            print("Error playing MP3: \(error)")
        }
    }
}

struct DocumentPicker: UIViewControllerRepresentable {
    class Coordinator: NSObject, UIDocumentPickerDelegate {
        var parent: DocumentPicker
        
        init(parent: DocumentPicker) {
            self.parent = parent
        }
        
        func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
            if let url = urls.first {
                parent.uploadMP3(fileURL: url)
            }
        }
        
        func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
            print("Document Picker was cancelled")
        }
    }
    
    func makeCoordinator() -> Coordinator {
        return Coordinator(parent: self)
    }
    
    func makeUIViewController(context: Context) -> UIDocumentPickerViewController {
        let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [.audio])
        documentPicker.allowsMultipleSelection = false
        documentPicker.delegate = context.coordinator
        return documentPicker
    }
    
    func updateUIViewController(_ uiViewController: UIDocumentPickerViewController, context: Context) {}
    
    func uploadMP3(fileURL: URL) {
        if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
            appDelegate.uploadMP3(fileURL: fileURL)
        }
    }
}

// this is the code but it lets me select a file closes the file folder and then it does not same to app or firebase. the debug says:

AX Lookup problem - errorCode:1100 error:Permission denied portName:'com.apple.iphone.axserver' PID:5049 ( 0 AXRuntime 0x00000001d9c67758 _AXGetPortFromCache + 796 1 AXRuntime 0x00000001d9c6d02c AXUIElementPerformFencedActionWithValue + 700 2 UIKit 0x000000025fac3488 7F0274D9-D3C9-3193-B606-1C74BE53B86C + 1537160 3 libdispatch.dylib 0x0000000100f0088c _dispatch_call_block_and_release + 32 4 libdispatch.dylib 0x0000000100f02578 _dispatch_client_callout + 20 5 libdispatch.dylib 0x0000000100f0a454 _dispatch_lane_serial_drain + 840 6 libdispatch.dylib 0x0000000100f0b25c _dispatch_lane_invoke + 408 7 libdispatch.dylib 0x0000000100f186fc _dispatch_root_queue_drain_deferred_wlh + 328 8 libdispatch.dylib 0x0000000100f17d0c _dispatch_workloop_worker_thread + 580 9 libsystem_pthread.dylib 0x000000022ce6c680 _pthread_wqthread + 288 10 libsystem_pthread.dylib 0x000000022ce6a474 start_wqthread + 8 ) The view service did terminate with error: Error Domain=_UIViewServiceErrorDomain Code=1 "(null)" UserInfo={Terminated=disconnect method}

Expecting to save to app and firebase an MP3 file