import SwiftUI
import Foundation
import UniformTypeIdentifiers

struct MeshLog: View {
	let logFile = MeshLogger.logFile
	var text = ""
	@State private var logs = [String]()
	@State private var isExporting: Bool = false
	@State private var document: LogDocument = LogDocument(logFile: "MESHTASTIC MESH ACTIVITY LOG\n")

	var body: some View {

		List(logs, id: \.self, rowContent: Text.init)
			.task {
				do {

					let url = logFile!
					logs.removeAll()
					for try await log in url.lines {
						logs.append(log)
						document.logFile.append("\(log) \n")
					}
					logs.reverse()
				} catch {
					// Stop adding logs when an error is thrown
				}
		}
		.fileExporter(
			isPresented: $isExporting,
			document: document,
			contentType: UTType.plainText,
			defaultFilename: "mesh-activity-log",
			onCompletion: { result in

				if case .success = result {
					print("Mesh activity log download: success.")
				} else {
					print("Mesh activity log download \(result).")
				}
			}
		)

		.textSelection(.enabled)
		.font(.caption2)

		HStack(alignment: .center) {
			Spacer()
			Button(action: {
				let text = ""
				do {
					 try text.write(to: logFile!, atomically: false, encoding: .utf8)
					 logs.removeAll()
				   } catch {
					 print(error)
				   }

			}) {
				Image(systemName: "trash.circle.fill")
					.symbolRenderingMode(.hierarchical)
					.imageScale(.large).foregroundColor(.accentColor)
				Text("Clear Log").font(.caption)
				.font(.caption)
					.foregroundColor(.accentColor)
			}
			.padding()
			.background(Color(.systemGray6))
			.clipShape(Capsule())

			Spacer()

			Button(action: {
				isExporting = true
			}) {
				Image(systemName: "arrow.down.circle.fill")
					.symbolRenderingMode(.hierarchical)
					.imageScale(.large).foregroundColor(.accentColor)
				Text("Download Log")
				.font(.caption)
				.foregroundColor(.accentColor)
			}
			.padding()
			.background(Color(.systemGray6))
			.clipShape(Capsule())

			Spacer()

		}
		.padding(.bottom, 10)
		.navigationTitle("Mesh Activity Log")
	}
}