@using Sandbox;
@using Sandbox.UI;
@inherits PanelComponent
@namespace VehicleProto

@* World & Terrain panel (public UX) — toggled by M ("World"). Switches the live world between the
   proving-grounds Test Track (proto) and the Playground, and toggles Playground terrain Flat ↔ Rolling
   Hills. F2/Esc are stolen by the s&box editor/host, so World rides a letter key. Every button drives
   GameBootstrap's REAL rebuild path (not a silent ConVar) so the change is visible immediately.
   Lab-family styling, cursor-interactive while open. *@

<root>
	@if ( UiState.WorldOpen )
	{
		<div class="panel">
			<div class="phead">
				<div class="ptitle">World &amp; Terrain</div>
				<div class="mono kbd">M</div>
			</div>

			<span class="section">World</span>
			<div class="worlds">
				<div class="wbtn @(IsPlayground ? "" : "on")" onclick=@( () => Apply( "proto", TerrainOn ) )>
					<span class="wname">Town</span>
					<span class="wsub">streets &amp; stations</span>
				</div>
				<div class="wbtn @(IsPlayground ? "on" : "")" onclick=@( () => Apply( "playground", TerrainOn ) )>
					<span class="wname">Stunt Track</span>
					<span class="wsub">jump park — coming soon</span>
				</div>
			</div>

			<div class="section">
				<span class="stitle">Terrain</span>
				@if ( !IsPlayground ) { <span class="hint">Playground only</span> }
			</div>
			<div class="terrain @(IsPlayground ? "" : "disabled")">
				<span class="seg @(TerrainOn ? "" : "on")" onclick=@( () => SetTerrain( false ) )>Flat</span>
				<span class="seg @(TerrainOn ? "on" : "")" onclick=@( () => SetTerrain( true ) )>Rolling Hills</span>
			</div>

			<span class="foot">M to close</span>
		</div>
	}
</root>

@code {
	string CurrentWorld => string.IsNullOrEmpty( VehicleBridge.World ) ? "proto" : VehicleBridge.World;
	bool IsPlayground => string.Equals( CurrentWorld, "playground", System.StringComparison.OrdinalIgnoreCase );
	bool TerrainOn => GameBootstrap.Terrain;

	/// <summary>Dev/test aid: open the panel on boot so automated UI verification can screenshot it
	/// (a real M keypress can't be injected through the editor MCP). Default off — M is the real
	/// toggle for players. Set <c>vp_panel_open 1</c> before Play. Read here in the LIVE component's
	/// own OnStart so the static it sets is the one this component's markup reads (avoids the
	/// hotload static-duplication that makes a plain ConCmd write miss the running panel).</summary>
	[ConVar( "vp_panel_open" )]
	public static bool OpenOnBoot { get; set; } = false;

	protected override void OnStart()
	{
		if ( OpenOnBoot )
			UiState.WorldOpen = true;
	}

	protected override void OnUpdate()
	{
		// Belt-and-braces: the panel is not even mounted while world switching is gated off, but guard
		// the hotkey here too so M can never toggle the panel until the feature returns.
		if ( !GameBootstrap.WorldSwitchEnabled )
			return;

		if ( Input.Pressed( "World" ) )
		{
			UiState.WorldOpen = !UiState.WorldOpen;
			Mouse.Visibility = UiState.WorldOpen ? MouseVisibility.Visible : MouseVisibility.Hidden;
		}

		if ( UiState.WorldOpen )
			Mouse.Visibility = MouseVisibility.Visible;
	}

	void Apply( string world, bool terrain )
	{
		GameBootstrap.RequestWorld( Scene, world, terrain );
		StateHasChanged();
	}

	// Terrain only applies to the Playground world; toggling it implies a Playground rebuild.
	void SetTerrain( bool on )
	{
		if ( !IsPlayground )
			return;
		Apply( "playground", on );
	}

	protected override int BuildHash() => System.HashCode.Combine( UiState.WorldOpen, CurrentWorld, TerrainOn );
}