import MeshtasticProtobufs
import OSLog
import SwiftUI
import DatadogSessionReplay

struct MessageText: View {
	static let linkBlue = Color(red: 0.4627, green: 0.8392, blue: 1) /* #76d6ff */
	static let localeDateFormat = DateFormatter.dateFormat(
		fromTemplate: "yyMMddjmmssa",
		options: 0,
		locale: Locale.current
	)
	static let dateFormatString = (localeDateFormat ?? "MM/dd/YY j:mm:ss:a")
	@Environment(\.managedObjectContext) var context
	@EnvironmentObject var accessoryManager: AccessoryManager
	
	let message: MessageEntity
	let tapBackDestination: MessageDestination
	let isCurrentUser: Bool
	let onReply: () -> Void
	// State for handling channel URL sheet
	@State private var saveChannels = false
	@State private var channelSettings: String?
	@State private var addChannels = false
	@State private var isShowingDeleteConfirmation = false
	
	var body: some View {
		
		SessionReplayPrivacyView(textAndInputPrivacy: .maskAll) {
			
			let markdownText = LocalizedStringKey(message.messagePayloadMarkdown ?? (message.messagePayload ?? "EMPTY MESSAGE"))
			return Text(markdownText)
				.tint(Self.linkBlue)
				.padding(.vertical, 10)
				.padding(.horizontal, 8)
				.foregroundColor(.white)
				.background(isCurrentUser ? .accentColor : Color(.gray))
				.cornerRadius(15)
				.overlay {
					/// Show the lock if the message is pki encrypted and has a real ack if sent by the current user, or is pki encrypted for incoming messages
					if message.pkiEncrypted && message.realACK || !isCurrentUser && message.pkiEncrypted {
						VStack(alignment: .trailing) {
							Spacer()
							HStack {
								Spacer()
								Image(systemName: "lock.circle.fill")
									.symbolRenderingMode(.palette)
									.foregroundStyle(.white, .green)
									.font(.system(size: 20))
									.offset(x: 8, y: 8)
							}
						}
					}
					let isStoreAndForward = message.portNum == Int32(PortNum.storeForwardApp.rawValue)
					let isDetectionSensorMessage = message.portNum == Int32(PortNum.detectionSensorApp.rawValue)
					if isStoreAndForward {
						VStack(alignment: .trailing) {
							Spacer()
							HStack {
								Spacer()
								Image(systemName: "envelope.circle.fill")
									.symbolRenderingMode(.palette)
									.foregroundStyle(.white, .gray)
									.font(.system(size: 20))
									.offset(x: 8, y: 8)
							}
						}
					}
					if tapBackDestination.overlaySensorMessage {
						VStack {
							isDetectionSensorMessage ? Image(systemName: "sensor.fill")
								.padding()
								.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topTrailing)
								.foregroundStyle(Color.orange)
								.symbolRenderingMode(.multicolor)
								.symbolEffect(.variableColor.reversing.cumulative, options: .repeat(20).speed(3))
								.offset(x: 20, y: -20)
							: nil
						}
					} else {
						EmptyView()
					}
				}
				.contextMenu {
					MessageContextMenuItems(
						message: message,
						tapBackDestination: tapBackDestination,
						isCurrentUser: isCurrentUser,
						isShowingDeleteConfirmation: $isShowingDeleteConfirmation,
						onReply: onReply
					)
				}
				.environment(\.openURL, OpenURLAction { url in
					channelSettings = nil
					if url.absoluteString.lowercased().contains("meshtastic.org/v/#") {
						// Handle contact URL
						ContactURLHandler.handleContactUrl(url: url, accessoryManager: AccessoryManager.shared)
						return .handled // Prevent default browser opening
					} else if url.absoluteString.lowercased().contains("meshtastic.org/e/") {
						// Handle channel URL
						let components = url.absoluteString.components(separatedBy: "#")
						guard !components.isEmpty, let lastComponent = components.last else {
							Logger.services.error("No valid components found in channel URL: \(url.absoluteString, privacy: .public)")
							return .discarded
						}
						self.addChannels = Bool(url.query?.contains("add=true") ?? false)
						guard let lastComponent = components.last else {
							Logger.services.error("Channel URL missing fragment component: \(url.absoluteString, privacy: .public)")
							self.channelSettings = nil
							return .discarded
						}
						self.channelSettings = lastComponent.components(separatedBy: "?").first ?? ""
						Logger.services.debug("Add Channel: \(self.addChannels, privacy: .public)")
						self.saveChannels = true
						Logger.mesh.debug("Opening Channel Settings URL: \(url.absoluteString, privacy: .public)")
						return .handled // Prevent default browser opening
					}
					return .systemAction // Open other URLs in browser
				})
			// Display sheet for channel settings
				.sheet(isPresented: Binding(
					get: {
						saveChannels && !(channelSettings == nil)
					},
					set: { newValue in
						saveChannels = newValue
						if !newValue {
							channelSettings = nil
						}
					}
				)) {
					SaveChannelQRCode(
						channelSetLink: channelSettings ?? "Empty Channel URL",
						addChannels: addChannels,
						accessoryManager: accessoryManager
					)
					.presentationDetents([.large])
					.presentationDragIndicator(.visible)
				}
				.confirmationDialog(
					"Are you sure you want to delete this message?",
					isPresented: $isShowingDeleteConfirmation,
					titleVisibility: .visible
				) {
					Button("Delete Message", role: .destructive) {
						context.delete(message)
						do {
							try context.save()
						} catch {
							Logger.data.error("Failed to delete message \(message.messageId, privacy: .public): \(error.localizedDescription, privacy: .public)")
						}
					}
					Button("Cancel", role: .cancel) {}
				}
		}
	}
}

private extension MessageDestination {
	var overlaySensorMessage: Bool {
		switch self {
		case .user: return false
		case .channel: return true
		}
	}
}