//
//  DeviceConfig.swift
//  Meshtastic Apple
//
//  Copyright (c) Garth Vander Houwen 6/13/22.
//

import MeshtasticProtobufs
import OSLog
import SwiftUI

struct DeviceConfig: View {

	@Environment(\.managedObjectContext) var context
	@EnvironmentObject var bleManager: BLEManager
	@Environment(\.dismiss) private var goBack

	var node: NodeInfoEntity?

	@State private var isPresentingNodeDBResetConfirm = false
	@State private var isPresentingFactoryResetConfirm = false
	@State var hasChanges = false
	@State var deviceRole = 0
	@State var buzzerGPIO = 0
	@State var buttonGPIO = 0
	@State var serialEnabled = true
	@State var debugLogEnabled = false
	@State var rebroadcastMode = 0
	@State var nodeInfoBroadcastSecs = 10800
	@State var doubleTapAsButtonPress = false
	@State var ledHeartbeatEnabled = true
	@State var isManaged = false
	@State var tzdef = ""

	var body: some View {
		VStack {
			Form {
				ConfigHeader(title: "Device", config: \.deviceConfig, node: node, onAppear: setDeviceValues)

				Section(header: Text("options")) {
					VStack(alignment: .leading) {
						Picker("Device Role", selection: $deviceRole ) {
							ForEach(DeviceRoles.allCases) { dr in
								Text(dr.name)
							}
						}
						Text(DeviceRoles(rawValue: deviceRole)?.description ?? "")
							.foregroundColor(.gray)
							.font(.callout)
					}
					.pickerStyle(DefaultPickerStyle())

					VStack(alignment: .leading) {
						Picker("Rebroadcast Mode", selection: $rebroadcastMode ) {
							ForEach(RebroadcastModes.allCases) { rm in
								Text(rm.name)
							}
						}
						Text(RebroadcastModes(rawValue: rebroadcastMode)?.description ?? "")
							.foregroundColor(.gray)
							.font(.callout)
					}
					.pickerStyle(DefaultPickerStyle())

					Toggle(isOn: $isManaged) {
						Label("Managed Device", systemImage: "gearshape.arrow.triangle.2.circlepath")
						Text("Enabling Managed mode will restrict access to all radio configurations, such as short/long names, regions, channels, modules, etc. and will only be accessible through the Admin channel. To avoid being locked out, make sure the Admin channel is working properly before enabling it.")
					}
					.toggleStyle(SwitchToggleStyle(tint: .accentColor))

					Picker("Node Info Broadcast Interval", selection: $nodeInfoBroadcastSecs ) {
						ForEach(UpdateIntervals.allCases) { ui in
							if ui.rawValue >= 3600 {
								Text(ui.description)
							}
						}
					}
					.pickerStyle(DefaultPickerStyle())
				}
				Section(header: Text("Hardware")) {

					Toggle(isOn: $doubleTapAsButtonPress) {
						Label("Double Tap as Button", systemImage: "hand.tap")
						Text("Treat double tap on supported accelerometers as a user button press.")
					}
					.toggleStyle(SwitchToggleStyle(tint: .accentColor))

					Toggle(isOn: $ledHeartbeatEnabled) {
						Label("LED Heartbeat", systemImage: "waveform.path.ecg")
						Text("Controls the blinking LED on the device.  For most devices this will control one of the up to 4 LEDS, the charger and GPS LEDs are not controllable.")
					}
					.toggleStyle(SwitchToggleStyle(tint: .accentColor))
				}
				Section(header: Text("Debug")) {
					Toggle(isOn: $serialEnabled) {
						Label("Serial Console", systemImage: "terminal")
					}
					.toggleStyle(SwitchToggleStyle(tint: .accentColor))
					Toggle(isOn: $debugLogEnabled) {
						Label("Debug Log", systemImage: "ant.fill")
					}
					.toggleStyle(SwitchToggleStyle(tint: .accentColor))
					VStack(alignment: .leading) {
						HStack {
							Label("Time Zone", systemImage: "clock.badge.exclamationmark")
							TextField("Time Zone", text: $tzdef, axis: .vertical)
								.foregroundColor(.gray)
								.onChange(of: tzdef, perform: { _ in
									let totalBytes = tzdef.utf8.count
									// Only mess with the value if it is too big
									if totalBytes > 63 {
										tzdef = String(tzdef.dropLast())
									}
								})
								.foregroundColor(.gray)

						}
						.keyboardType(.default)
						.disableAutocorrection(true)
						Text("Time zone for dates on the device screen and log.")
							.foregroundColor(.gray)
							.font(.callout)
					}
				}
				Section(header: Text("GPIO")) {
					Picker("Button GPIO", selection: $buttonGPIO) {
						ForEach(0..<49) {
							if $0 == 0 {
								Text("unset")
							} else {
								Text("Pin \($0)")
							}
						}
					}
					.pickerStyle(DefaultPickerStyle())
					Picker("Buzzer GPIO", selection: $buzzerGPIO) {
						ForEach(0..<49) {
							if $0 == 0 {
								Text("unset")
							} else {
								Text("Pin \($0)")
							}
						}
					}
					.pickerStyle(DefaultPickerStyle())
				}
			}
			.disabled(self.bleManager.connectedPeripheral == nil || node?.deviceConfig == nil)
			// Only show these buttons for the BLE connected node
			if bleManager.connectedPeripheral != nil && node?.num ?? -1  == bleManager.connectedPeripheral.num {
				HStack {
					Button("Reset NodeDB", role: .destructive) {
						isPresentingNodeDBResetConfirm = true
					}
					.disabled(node?.user == nil)
					.buttonStyle(.bordered)
					.buttonBorderShape(.capsule)
					.controlSize(.regular)
					.padding(.leading)
					.confirmationDialog(
						"are.you.sure",
						isPresented: $isPresentingNodeDBResetConfirm,
						titleVisibility: .visible
					) {
						Button("Erase all device and app data?", role: .destructive) {
							if bleManager.sendNodeDBReset(fromUser: node!.user!, toUser: node!.user!) {
								DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
									bleManager.disconnectPeripheral()
									clearCoreDataDatabase(context: context, includeRoutes: false)
								}

							} else {
								Logger.mesh.error("NodeDB Reset Failed")
							}
						}
					}
					Button("Factory Reset", role: .destructive) {
						isPresentingFactoryResetConfirm = true
					}
					.disabled(node?.user == nil)
					.buttonStyle(.bordered)
					.buttonBorderShape(.capsule)
					.controlSize(.regular)
					.padding(.trailing)
					.confirmationDialog(
						"All device and app data will be deleted.",
						isPresented: $isPresentingFactoryResetConfirm,
						titleVisibility: .visible
					) {
						Button("Factory reset your device and app? ", role: .destructive) {
							if bleManager.sendFactoryReset(fromUser: node!.user!, toUser: node!.user!) {
								DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
									bleManager.disconnectPeripheral()
									clearCoreDataDatabase(context: context, includeRoutes: false)
								}
							} else {
								Logger.mesh.error("Factory Reset Failed")
							}
						}
					}
				}
			}
			HStack {
				SaveConfigButton(node: node, hasChanges: $hasChanges) {
					let connectedNode = getNodeInfo(id: bleManager.connectedPeripheral.num, context: context)
					if connectedNode != nil {
						var dc = Config.DeviceConfig()
						dc.role = DeviceRoles(rawValue: deviceRole)!.protoEnumValue()
						dc.serialEnabled = serialEnabled
						dc.debugLogEnabled = debugLogEnabled
						dc.buttonGpio = UInt32(buttonGPIO)
						dc.buzzerGpio = UInt32(buzzerGPIO)
						dc.rebroadcastMode = RebroadcastModes(rawValue: rebroadcastMode)?.protoEnumValue() ?? RebroadcastModes.all.protoEnumValue()
						dc.nodeInfoBroadcastSecs = UInt32(nodeInfoBroadcastSecs)
						dc.doubleTapAsButtonPress = doubleTapAsButtonPress
						dc.isManaged = isManaged
						dc.tzdef = tzdef
						dc.ledHeartbeatDisabled = !ledHeartbeatEnabled
						if isManaged {
							serialEnabled = false
							debugLogEnabled = false
						}
						let adminMessageId = bleManager.saveDeviceConfig(config: dc, fromUser: connectedNode!.user!, toUser: node!.user!, adminIndex: connectedNode?.myInfo?.adminIndex ?? 0)
						if adminMessageId > 0 {
							// Should show a saved successfully alert once I know that to be true
							// for now just disable the button after a successful save
							hasChanges = false
							goBack()
						}
					}
				}
			}
			Spacer()
		}
		.navigationTitle("device.config")
		.navigationBarItems(
			trailing: ZStack {
				ConnectedDevice(
					bluetoothOn: bleManager.isSwitchedOn,
					deviceConnected: bleManager.connectedPeripheral != nil,
					name: bleManager.connectedPeripheral?.shortName ?? "?"
				)
			}
		)
		.onAppear {
			// Need to request a DeviceConfig from the remote node before allowing changes
			if bleManager.connectedPeripheral != nil && node?.deviceConfig == nil {
				Logger.mesh.info("empty device config")
				let connectedNode = getNodeInfo(id: bleManager.connectedPeripheral?.num ?? -1, context: context)
				if node != nil && connectedNode != nil && connectedNode?.user != nil {
					_ = bleManager.requestDeviceConfig(fromUser: connectedNode!.user!, toUser: node!.user!, adminIndex: connectedNode?.myInfo?.adminIndex ?? 0)
				}
			}
		}
		.onChange(of: deviceRole) {
			if $0 != node?.deviceConfig?.role ?? -1 { hasChanges = true }
		}
		.onChange(of: serialEnabled) {
			if $0 != node?.deviceConfig?.serialEnabled { hasChanges = true }
		}
		.onChange(of: debugLogEnabled) {
			if $0 != node?.deviceConfig?.debugLogEnabled { hasChanges = true }
		}
		.onChange(of: buttonGPIO) { newButtonGPIO in
			if newButtonGPIO != node?.deviceConfig?.buttonGpio ?? -1 { hasChanges = true }
		}
		.onChange(of: buzzerGPIO) { newBuzzerGPIO in
			if newBuzzerGPIO != node?.deviceConfig?.buttonGpio ?? -1 { hasChanges = true }
		}
		.onChange(of: rebroadcastMode) { newRebroadcastMode in
			if newRebroadcastMode != node?.deviceConfig?.rebroadcastMode ?? -1 { hasChanges = true }
		}
		.onChange(of: nodeInfoBroadcastSecs) { newNodeInfoBroadcastSecs in
			if newNodeInfoBroadcastSecs != node?.deviceConfig?.nodeInfoBroadcastSecs ?? -1 { hasChanges = true }
		}
		.onChange(of: doubleTapAsButtonPress) {
			if $0 != node?.deviceConfig?.doubleTapAsButtonPress { hasChanges = true }
		}
		.onChange(of: isManaged) {
			if $0 != node?.deviceConfig?.isManaged { hasChanges = true }
		}
		.onChange(of: tzdef) { newTzdef in
			if newTzdef != node?.deviceConfig?.tzdef { hasChanges = true }
		}
		.onChange(of: ledHeartbeatEnabled) { newLedHeartbeatEnabled in
			if node != nil && node?.deviceConfig != nil {
				if newLedHeartbeatEnabled != node!.deviceConfig!.ledHeartbeatEnabled { hasChanges = true }
			}
		}
	}
	func setDeviceValues() {
		self.deviceRole = Int(node?.deviceConfig?.role ?? 0)
		self.serialEnabled = (node?.deviceConfig?.serialEnabled ?? true)
		self.debugLogEnabled = node?.deviceConfig?.debugLogEnabled ?? false
		self.buttonGPIO = Int(node?.deviceConfig?.buttonGpio ?? 0)
		self.buzzerGPIO = Int(node?.deviceConfig?.buzzerGpio ?? 0)
		self.rebroadcastMode = Int(node?.deviceConfig?.rebroadcastMode ?? 0)
		self.nodeInfoBroadcastSecs = Int(node?.deviceConfig?.nodeInfoBroadcastSecs ?? 900)
		if nodeInfoBroadcastSecs < 3600 {
			nodeInfoBroadcastSecs = 3600
		}
		self.doubleTapAsButtonPress = node?.deviceConfig?.doubleTapAsButtonPress ?? false
		self.ledHeartbeatEnabled = node?.deviceConfig?.ledHeartbeatEnabled ?? true
		self.isManaged = node?.deviceConfig?.isManaged ?? false
		self.tzdef = node?.deviceConfig?.tzdef ?? ""
		if self.tzdef.isEmpty {
			self.tzdef = TimeZone.current.posixDescription
			self.hasChanges = true
		} else {
			self.hasChanges = false
		}
	}
}