import SwiftUI
import Foundation
import AppKit

/// View for rendering a terminal panel
struct TerminalPanelView: View {
    @ObservedObject var panel: TerminalPanel
    let isFocused: Bool
    let isVisibleInUI: Bool
    let portalPriority: Int
    let isSplit: Bool
    let appearance: PanelAppearance
    let hasUnreadNotification: Bool
    let onFocus: () -> Void
    let onTriggerFlash: () -> Void

    var body: some View {
        ZStack(alignment: .topLeading) {
            GhosttyTerminalView(
                terminalSurface: panel.surface,
                isActive: isFocused,
                isVisibleInUI: isVisibleInUI,
                portalZPriority: portalPriority,
                showsInactiveOverlay: isSplit && !isFocused,
                showsUnreadNotificationRing: hasUnreadNotification,
                inactiveOverlayColor: appearance.unfocusedOverlayNSColor,
                inactiveOverlayOpacity: appearance.unfocusedOverlayOpacity,
                reattachToken: panel.viewReattachToken,
                onFocus: { _ in onFocus() },
                onTriggerFlash: onTriggerFlash
            )
            // Keep the NSViewRepresentable identity stable across bonsplit structural updates.
            // This prevents transient teardown/recreate that can momentarily detach the hosted terminal view.
            .id(panel.id)
            .background(Color.clear)

            // Search overlay
            if let searchState = panel.searchState {
                SurfaceSearchOverlay(
                    surface: panel.surface,
                    searchState: searchState,
                    onClose: {
                        panel.searchState = nil
                        panel.hostedView.moveFocus()
                    }
                )
            }
        }
    }
}

/// Shared appearance settings for panels
struct PanelAppearance {
    let dividerColor: Color
    let unfocusedOverlayNSColor: NSColor
    let unfocusedOverlayOpacity: Double

    static func fromConfig(_ config: GhosttyConfig) -> PanelAppearance {
        PanelAppearance(
            dividerColor: Color(nsColor: config.resolvedSplitDividerColor),
            unfocusedOverlayNSColor: config.unfocusedSplitOverlayFill,
            unfocusedOverlayOpacity: config.unfocusedSplitOverlayOpacity
        )
    }
}