namespace AdvancedMappingTools;

public sealed class BusShelterSettings : PropSettings
{
	[Property, Group( "Bus Shelter" ), Range( 48, 512, slider: false ), WideMode, Description( "Length along the street." )]
	public float Length { get; set; } = 160.0f;

	[Property, Group( "Bus Shelter" ), Title( "Side Walls" ), WideMode, Description( "Glass walls at both ends." )]
	public bool SideWalls { get; set; } = true;

	[Property, Group( "Bus Shelter" ), WideMode]
	public bool Bench { get; set; } = true;

	[Property, Group( "Bus Shelter" ), Title( "Stop Sign" ), WideMode, Description( "A pole with the stop sign and a timetable next to the shelter." )]
	public bool Sign { get; set; } = true;

	[Property, Group( "Bus Shelter" ), Title( "Advert Panel" ), WideMode, Description( "A lit advertising case as one end wall." )]
	public bool AdPanel { get; set; } = true;

	[Property, Group( "Bus Shelter" ), Title( "Bin" ), WideMode]
	public bool Bin { get; set; } = true;

	[Property, Group( "Bus Shelter" ), Range( 32, 96, slider: false ), WideMode, Description( "Depth from the back wall to the front edge of the roof frame." )]
	public float Depth { get; set; } = 48.0f;

	public override string PropName => "Bus Shelter";
}

/// <summary>
/// A bus shelter on a concrete pad. Square posts carry eave beams and a sloped canopy, glass sits
/// between the posts at the back and the ends, one end can be an advertising case. A slatted bench
/// on two feet, a bin, and a stop sign with a timetable on its own pole. The open side faces +Y,
/// towards the street. No part reaches into another.
/// </summary>
public sealed class BusShelterGenerator : PropGenerator
{
	public override string Id => "busshelter";
	public override string Title => "Bus Shelter";
	public override Type SettingsType => typeof( BusShelterSettings );

	public const float Height = 96.0f;
	const float Pad = 2.0f;
	const float PostX = 1.0f;
	const float PostY = 1.5f;
	const float Beam = 3.0f;
	const float Pane = 0.25f;
	const float Rail = 2.0f;

	protected override void Build( PropSettings settings, PropBuilder b )
	{
		var s = (BusShelterSettings)settings;
		var length = MathF.Max( s.Length, 48.0f );
		var depth = Math.Clamp( s.Depth, 32.0f, 96.0f );
		var half = length * 0.5f;
		var beamLow = Height - Beam;
		var glassLow = Pad + Rail;

		b.Box( "pad", "Concrete Pad", b.Main, new Vector3( -half - 24.0f, -6.0f, 0.0f ), new Vector3( half + 24.0f, depth + 8.0f, Pad ) );

		// Posts: along the back at most 64 apart, and one at each front corner.
		var bays = Math.Max( 1, (int)MathF.Ceiling( length / 64.0f ) );
		var backPosts = Enumerable.Range( 0, bays + 1 ).Select( k => -half + length * k / bays ).ToList();
		foreach ( var (k, x) in backPosts.Select( ( x, k ) => (k, x) ) )
			b.Box( $"post_back{k}", "Post", b.Metal, new Vector3( x - PostX, 0.0f, Pad ), new Vector3( x + PostX, PostY * 2.0f, beamLow ) );
		foreach ( var (name, x) in new[] { ("left", -half), ("right", half) } )
			b.Box( $"post_front_{name}", "Post", b.Metal, new Vector3( x - PostX, depth - PostY * 2.0f, Pad ), new Vector3( x + PostX, depth, beamLow ) );

		// Eave beams: back and front over the full length, the ends between them.
		b.Box( "beam_back", "Eave Beam", b.Metal, new Vector3( -half - PostX, 0.0f, beamLow ), new Vector3( half + PostX, PostY * 2.0f, Height ) );
		b.Box( "beam_front", "Eave Beam", b.Metal, new Vector3( -half - PostX, depth - PostY * 2.0f, beamLow ), new Vector3( half + PostX, depth, Height ) );
		foreach ( var (name, x) in new[] { ("left", -half), ("right", half) } )
			b.Box( $"beam_{name}", "Eave Beam", b.Metal, new Vector3( x - PostX, PostY * 2.0f, beamLow ), new Vector3( x + PostX, depth - PostY * 2.0f, Height ) );

		// The canopy lies on the beams and falls towards the back, with a fascia along the front.
		b.Part( "roof", "Canopy", b.Metal, kit =>
			kit.Hex( new Vector3( -half - 6.0f, -6.0f, Height ), new Vector3( half + 6.0f, -6.0f, Height ), new Vector3( half + 6.0f, depth + 10.0f, Height ), new Vector3( -half - 6.0f, depth + 10.0f, Height ),
				new Vector3( -half - 6.0f, -6.0f, Height + 2.5f ), new Vector3( half + 6.0f, -6.0f, Height + 2.5f ), new Vector3( half + 6.0f, depth + 10.0f, Height + 5.0f ), new Vector3( -half - 6.0f, depth + 10.0f, Height + 5.0f ) ) );
		b.Box( "fascia", "Fascia", b.Detail, new Vector3( -half - 6.0f, depth + 10.0f, Height - 2.0f ), new Vector3( half + 6.0f, depth + 11.0f, Height + 5.0f ) );

		// Back glass with a rail under each pane.
		for ( var k = 0; k + 1 < backPosts.Count; k++ )
		{
			var x0 = backPosts[k] + PostX;
			var x1 = backPosts[k + 1] - PostX;
			b.Box( $"rail_back{k}", "Bottom Rail", b.Metal, new Vector3( x0, PostY - 1.0f, Pad ), new Vector3( x1, PostY + 1.0f, glassLow ) );
			b.Box( $"glass_back{k}", "Back Glass", b.Detail, new Vector3( x0, PostY - Pane, glassLow ), new Vector3( x1, PostY + Pane, beamLow ) );
		}

		// The ends: glass, or on the left an advertising case standing between the posts.
		foreach ( var (name, x, ad) in new[] { ("left", -half, s.AdPanel), ("right", half, false) } )
		{
			if ( !s.SideWalls && !ad ) continue;
			var y0 = PostY * 2.0f;
			var y1 = depth - PostY * 2.0f;
			if ( ad )
			{
				b.Box( $"ad_case_{name}", "Advert Case", b.Metal, new Vector3( x - 3.0f, y0, Pad ), new Vector3( x + 3.0f, y1, beamLow ) );
				b.Box( $"ad_face_{name}", "Advert", b.Detail, new Vector3( x + 3.0f, y0 + 2.0f, Pad + 8.0f ), new Vector3( x + 3.2f, y1 - 2.0f, beamLow - 4.0f ) );
				b.Box( $"ad_back_{name}", "Advert", b.Detail, new Vector3( x - 3.2f, y0 + 2.0f, Pad + 8.0f ), new Vector3( x - 3.0f, y1 - 2.0f, beamLow - 4.0f ) );
				continue;
			}
			b.Box( $"rail_{name}", "Bottom Rail", b.Metal, new Vector3( x - 1.0f, y0, Pad ), new Vector3( x + 1.0f, y1, glassLow ) );
			b.Box( $"glass_{name}", "Side Glass", b.Detail, new Vector3( x - Pane, y0, glassLow ), new Vector3( x + Pane, y1, beamLow ) );
		}

		if ( s.Bench ) Bench( b, MathF.Min( length * 0.6f, 120.0f ) * 0.5f );
		if ( s.Bin ) b.Round( "bin", "Bin", b.Metal, -half - 15.0f, depth - 6.0f, 6.0f, 6.5f, Pad, Pad + 30.0f, 16 );
		if ( s.Sign ) Sign( b, half + 16.0f, depth + 2.0f );
	}

	/// <summary>
	/// Three slats on two pedestal feet with a bracket each, in front of the back glass.
	/// </summary>
	static void Bench( PropBuilder b, float half )
	{
		const float seat = 17.0f;
		const float front = 21.0f;
		const float back = 6.0f;
		foreach ( var (name, x) in new[] { ("left", -half + 6.0f), ("right", half - 6.0f) } )
		{
			b.Box( $"bench_foot_{name}", "Bench Foot", b.Metal, new Vector3( x - 1.0f, 10.0f, Pad ), new Vector3( x + 1.0f, 14.0f, seat - 1.5f ) );
			b.Box( $"bench_bracket_{name}", "Bench Bracket", b.Metal, new Vector3( x - 1.0f, back, seat - 1.5f ), new Vector3( x + 1.0f, front, seat ) );
		}

		var slat = (front - back - 1.0f) / 3.0f;
		for ( var k = 0; k < 3; k++ )
		{
			var y0 = back + k * (slat + 0.5f);
			b.Box( $"bench_slat{k}", "Bench Slat", b.Main, new Vector3( -half, y0, seat ), new Vector3( half, y0 + slat, seat + 1.25f ) );
		}
	}

	/// <summary>
	/// A pole with a round stop sign and a timetable case on its street side.
	/// </summary>
	static void Sign( PropBuilder b, float x, float y )
	{
		// The pole stands on the pad.
		b.Round( "sign_pole", "Sign Pole", b.Metal, x, y, 1.25f, 1.0f, Pad, 108.0f, 12 );
		b.Disc( "sign", "Stop Sign", b.Detail, x, 100.0f, 9.0f, y + 1.35f, y + 1.85f, 24 );
		b.Box( "timetable", "Timetable", b.Detail, new Vector3( x - 6.0f, y + 1.35f, 58.0f ), new Vector3( x + 6.0f, y + 2.5f, 78.0f ) );
	}
}

/// <summary>
/// Places a bus shelter. One click, the open side faces the street.
/// </summary>
[ToolCategory( "Street" )]
[Title( "Bus Shelter" ), Icon( "directions_bus" )]
public sealed class BusShelterEditor( PrimitiveTool tool ) : PropEditor( tool )
{
	readonly BusShelterGenerator _generator = new();

	public BusShelterSettings Settings { get; } = new();

	protected override IPartGenerator Generator => _generator;

	public override PropSettings Props => Settings;
}