import Defaults
import SwiftUI

struct AdvancedSettings: View {
    @Default(.showMPVPlaybackStats) private var showMPVPlaybackStats
    @Default(.mpvCacheSecs) private var mpvCacheSecs
    @Default(.mpvCachePauseWait) private var mpvCachePauseWait
    @Default(.mpvCachePauseInital) private var mpvCachePauseInital
    @Default(.mpvDeinterlace) private var mpvDeinterlace
    @Default(.mpvEnableLogging) private var mpvEnableLogging
    @Default(.mpvHWdec) private var mpvHWdec
    @Default(.mpvDemuxerLavfProbeInfo) private var mpvDemuxerLavfProbeInfo
    @Default(.mpvInitialAudioSync) private var mpvInitialAudioSync
    @Default(.mpvSetRefreshToContentFPS) private var mpvSetRefreshToContentFPS
    @Default(.showCacheStatus) private var showCacheStatus
    @Default(.feedCacheSize) private var feedCacheSize
    @Default(.showPlayNowInBackendContextMenu) private var showPlayNowInBackendContextMenu
    @Default(.videoLoadingRetryCount) private var videoLoadingRetryCount
    @Default(.avPlayerAllowsNonStreamableFormats) private var avPlayerAllowsNonStreamableFormats

    @State private var filesToShare = [MPVClient.logFile]
    @State private var presentingShareSheet = false

    @ObservedObject private var player = PlayerModel.shared
    private var settings = SettingsModel.shared

    var body: some View {
        VStack(alignment: .leading) {
            #if os(macOS)
                advancedSettings
                Spacer()
            #else
                List {
                    advancedSettings
                }
                #if os(tvOS)
                .listStyle(.plain)
                #elseif os(iOS)
                .sheet(isPresented: $presentingShareSheet) {
                    ShareSheet(activityItems: filesToShare)
                        .id("logs-\(filesToShare.count)")
                }
                .listStyle(.insetGrouped)
                #endif
            #endif
        }
        #if os(tvOS)
        .buttonStyle(.plain)
        .toggleStyle(TVOSPlainToggleStyle())
        .frame(maxWidth: 1000)
        #endif
        .navigationTitle("Advanced")
    }

    var logButton: some View {
        Button {
            #if os(macOS)
                NSWorkspace.shared.selectFile(MPVClient.logFile.path, inFileViewerRootedAtPath: YatteeApp.logsDirectory.path)
            #else
                presentingShareSheet = true
            #endif
        } label: {
            #if os(macOS)
                let labelText = "Open logs in Finder".localized()
            #else
                let labelText = "Share Logs...".localized()
            #endif
            Text(labelText)
        }
    }

    @ViewBuilder var advancedSettings: some View {
        Section(header: SettingsHeader(text: "Advanced")) {
            showPlayNowInBackendButtonsToggle
            videoLoadingRetryCountField
        }

        Section(header: SettingsHeader(text: "AVPlayer"), footer: avPlayerNonStreamableFormatsFooter) {
            avPlayerAllowsNonStreamableFormatsToggle
        }

        Section(header: SettingsHeader(text: "MPV"), footer: mpvFooter) {
            showMPVPlaybackStatsToggle
            #if !os(tvOS)
                mpvEnableLoggingToggle
            #endif

            Toggle(isOn: $mpvCachePauseInital) {
                HStack {
                    Text("cache-pause-initial")
                    #if !os(tvOS)
                        Image(systemName: "link")
                            .font(.footnote)
                        #if os(iOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-pause-initial")!)
                            }
                        #elseif os(macOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-pause-initial")!)
                            }
                            .onHover(perform: onHover(_:))
                        #endif
                    #endif
                }
            }

            HStack {
                Text("cache-secs")
                #if !os(tvOS)
                    Image(systemName: "link")
                        .font(.footnote)
                    #if os(iOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-secs")!)
                        }
                    #elseif os(macOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-secs")!)
                        }
                        .onHover(perform: onHover(_:))
                    #endif

                #endif
                TextField("cache-secs", text: $mpvCacheSecs)
                #if !os(macOS)
                    .keyboardType(.numberPad)
                #endif
            }
            .multilineTextAlignment(.trailing)

            HStack {
                Group {
                    Text("cache-pause-wait")
                    #if !os(tvOS)
                        Image(systemName: "link")
                            .font(.footnote)
                        #if os(iOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-pause-wait")!)
                            }
                        #elseif os(macOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-cache-pause-wait")!)
                            }
                            .onHover(perform: onHover(_:))
                        #endif
                    #endif
                }.frame(minWidth: 140, alignment: .leading)

                TextField("cache-pause-wait", text: $mpvCachePauseWait)
                #if !os(macOS)
                    .keyboardType(.numberPad)
                #endif
            }
            .multilineTextAlignment(.trailing)

            Toggle(isOn: $mpvDeinterlace) {
                HStack {
                    Text("deinterlace")
                    #if !os(tvOS)
                        Image(systemName: "link")
                            .font(.footnote)
                        #if os(iOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-deinterlace")!)
                            }
                        #elseif os(macOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-deinterlace")!)
                            }
                            .onHover(perform: onHover(_:))
                        #endif
                    #endif
                }
            }

            Toggle(isOn: $mpvInitialAudioSync) {
                HStack {
                    Text("initial-audio-sync")
                    #if !os(tvOS)
                        Image(systemName: "link")
                            .font(.footnote)
                        #if os(iOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-initial-audio-sync")!)
                            }
                        #elseif os(macOS)
                            .accessibilityAddTraits([.isButton, .isLink])
                            .onTapGesture {
                                NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-initial-audio-sync")!)
                            }
                            .onHover(perform: onHover(_:))
                        #endif
                    #endif
                }
            }

            HStack {
                Text("hwdec")

                #if !os(tvOS)
                    Image(systemName: "link")
                        .font(.footnote)
                    #if os(iOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-hwdec")!)
                        }
                    #elseif os(macOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-hwdec")!)
                        }
                        .onHover(perform: onHover(_:))
                    #endif
                #endif

                Picker("", selection: $mpvHWdec) {
                    ForEach(["auto", "auto-safe", "auto-copy"], id: \.self) {
                        Text($0)
                    }
                }
                #if !os(tvOS)
                .pickerStyle(MenuPickerStyle())
                #endif
            }

            HStack {
                Text("demuxer-lavf-probe-info")

                #if !os(tvOS)
                    Image(systemName: "link")
                        .font(.footnote)
                    #if os(iOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            UIApplication.shared.open(URL(string: "https://mpv.io/manual/stable/#options-demuxer-lavf-probe-info")!)
                        }
                    #elseif os(macOS)
                        .accessibilityAddTraits([.isButton, .isLink])
                        .onTapGesture {
                            NSWorkspace.shared.open(URL(string: "https://mpv.io/manual/stable/#options-demuxer-lavf-probe-info")!)
                        }
                        .onHover(perform: onHover(_:))
                    #endif
                #endif

                Picker("", selection: $mpvDemuxerLavfProbeInfo) {
                    ForEach(["yes", "no", "auto", "nostreams"], id: \.self) {
                        Text($0)
                    }
                }
                #if !os(tvOS)
                .pickerStyle(MenuPickerStyle())
                #endif
            }

            Toggle(isOn: $mpvSetRefreshToContentFPS) {
                HStack {
                    Text("Sync refresh rate with content FPS – EXPERIMENTAL")
                }
            }

            if mpvEnableLogging {
                logButton
            }
        }

        Section(header: SettingsHeader(text: "Cache"), footer: cacheSize) {
            showCacheStatusToggle
            feedCacheSizeTextField
            clearCacheButton
        }
    }

    @ViewBuilder var mpvFooter: some View {
        let url = "https://mpv.io/manual/stable/"

        VStack(alignment: .leading) {
            Text("Restart the app to apply the settings above.")
                .padding(.bottom, 1)
            VStack(alignment: .leading, spacing: 2) {
                #if os(tvOS)
                    Text("More info can be found in MPV reference manual:")
                    Text(url)
                #else
                    Text("Further information can be found in the ")
                        + Text("MPV reference manual").underline().bold()
                        + Text(" by clicking on the link icon next to the option.")
                #endif
            }
        }
        .foregroundColor(.secondary)
    }

    var showPlayNowInBackendButtonsToggle: some View {
        Toggle("Show video context menu options to force selected backend", isOn: $showPlayNowInBackendContextMenu)
    }

    private var videoLoadingRetryCountField: some View {
        HStack {
            Text("Maximum retries for video loading")
                .frame(minWidth: 200, alignment: .leading)
                .multilineTextAlignment(.leading)
            TextField("Limit", value: $videoLoadingRetryCount, formatter: NumberFormatter())
                .multilineTextAlignment(.trailing)
            #if !os(macOS)
                .keyboardType(.numberPad)
            #endif
        }
    }

    var showMPVPlaybackStatsToggle: some View {
        Toggle("Show playback statistics", isOn: $showMPVPlaybackStats)
    }

    var mpvEnableLoggingToggle: some View {
        Toggle("Enable logging", isOn: $mpvEnableLogging)
    }

    #if os(macOS)
        private func onHover(_ inside: Bool) {
            if inside {
                NSCursor.pointingHand.push()
            } else {
                NSCursor.pop()
            }
        }
    #endif

    private var feedCacheSizeTextField: some View {
        HStack {
            Text("Maximum feed items")
                .frame(minWidth: 200, alignment: .leading)
                .multilineTextAlignment(.leading)
            TextField("Limit", text: $feedCacheSize)
                .multilineTextAlignment(.trailing)
            #if !os(macOS)
                .keyboardType(.numberPad)
            #endif
        }
    }

    private var showCacheStatusToggle: some View {
        Toggle("Show cache status", isOn: $showCacheStatus)
    }

    private var clearCacheButton: some View {
        Button {
            settings.presentAlert(
                Alert(
                    title: Text(
                        "Are you sure you want to clear cache?"
                    ),
                    primaryButton: .destructive(Text("Clear"), action: BaseCacheModel.shared.clear),
                    secondaryButton: .cancel()
                )
            )
        } label: {
            Text("Clear all")
                .foregroundColor(.red)
        }
    }

    var cacheSize: some View {
        Text(String(format: "Total size: %@".localized(), BaseCacheModel.shared.totalSizeFormatted))
            .foregroundColor(.secondary)
    }

    var avPlayerAllowsNonStreamableFormatsToggle: some View {
        Toggle("Enable non-streamable formats (MP4/AVC1)", isOn: $avPlayerAllowsNonStreamableFormats)
            .onChange(of: avPlayerAllowsNonStreamableFormats) { _ in
                // Trigger refresh of available streams when setting changes
                if let video = player.currentVideo {
                    player.loadAvailableStreams(video)
                }
            }
    }

    @ViewBuilder var avPlayerNonStreamableFormatsFooter: some View {
        Text("Non-streamable video formats (MP4/AVC1) may take a long time to start playback with AVPlayer. These formats require downloading metadata before playback can begin. Limited to 1080p maximum. For better performance with these formats, use MPV backend instead.")
            .foregroundColor(.secondary)
            .fixedSize(horizontal: false, vertical: true)
    }
}

struct AdvancedSettings_Previews: PreviewProvider {
    static var previews: some View {
        AdvancedSettings()
            .injectFixtureEnvironmentObjects()
    }
}