using System.Text.RegularExpressions;
using BspImport.Decompiler.Formats.Readers;

namespace BspImport.Decompiler.Formats.Descriptors;

public sealed class Portal2BspFormatDescriptor : IBspFormatDescriptor
{
	private static readonly IBspStructReaders _readers = new StandardBspStructReaders();

	private static readonly Regex MapNameRegex =
		new( @"^(mp_coop|sp_a[1-5])_", RegexOptions.IgnoreCase | RegexOptions.Compiled );

	private static readonly HashSet<string> Signatures = new( StringComparer.OrdinalIgnoreCase )
	{
		"env_lightrail_endpoint",
		"env_player_viewfinder",
		"env_portal_credits",
		"env_portal_laser",
		"env_portal_path_track",
		"env_sprite_clientside",
		"exploding_futbol_catcher",
		"filter_player_held",
		"func_noportal_volume",
		"func_placement_clip",
		"func_portal_bumper",
		"func_portal_detector",
		"func_portal_orientation",
		"func_portalled",
		"func_weight_button",
		"futbol_catcher",
		"info_coop_spawn",
		"info_landmark_entry",
		"info_landmark_exit",
		"info_paint_sprayer",
		"info_placement_helper",
		"info_player_ping_detector",
		"info_target_instructor_hint",
		"info_target_personality_sphere",
		"linked_portal_door",
		"logic_coop_manager",
		"npc_personality_core",
		"npc_portal_turret_floor",
		"npc_portal_turret_ground",
		"npc_rocket_turret",
		"npc_security_camera",
		"npc_wheatley_boss",
		"paint_sphere",
		"point_changelevel",
		"point_energy_ball_launcher",
		"point_futbol_shooter",
		"point_laser_target",
		"portalmp_gamerules",
		"prop_button",
		"prop_exploding_futbol",
		"prop_exploding_futbol_socket",
		"prop_exploding_futbol_spawner",
		"prop_floor_ball_button",
		"prop_floor_button",
		"prop_floor_cube_button",
		"prop_glados_core",
		"prop_glass_futbol",
		"prop_glass_futbol_socket",
		"prop_glass_futbol_spawner",
		"prop_indicator_panel",
		"prop_laser_catcher",
		"prop_laser_relay",
		"prop_linked_portal_door",
		"prop_mirror",
		"prop_monster_box",
		"prop_paint_bomb",
		"prop_personality_sphere",
		"prop_physics_paintable",
		"prop_portal",
		"prop_portal_stats_display",
		"prop_telescopic_arm",
		"prop_testchamber_door",
		"prop_tic_tac_toe_panel",
		"prop_tractor_beam",
		"prop_under_button",
		"prop_under_floor_button",
		"prop_wall_projector",
		"prop_weighted_cube",
		"trigger_catapult",
		"trigger_paint_cleanser",
		"trigger_ping_detector",
		"trigger_playerteam",
		"trigger_portal_cleanser",
		"vgui_level_placard_display",
		"vgui_movie_display",
		"vgui_mp_lobby_display",
		"vgui_neurotoxin_countdown",
		"vgui_screen",
		"weapon_portalgun"
	};

	public BspGameFormat GameFormat => BspGameFormat.Portal2;
	public IReadOnlySet<int> SupportedVersions { get; } = new HashSet<int> { 21 };
	public string DisplayName => "Portal 2 BSP";
	public int SpecificityScore => 100;

	public LumpHeaderLayout LumpHeaderLayout => LumpHeaderLayout.Standard;
	public BrushSideLayout BrushSideLayout => BrushSideLayout.ThinFlag;
	public StaticPropLayout StaticPropLayout => StaticPropLayout.V9;

	public IBspStructReaders GetStructReaders( int bspVersion ) => _readers;

	public bool MatchesMapName( string mapName )
	{
		return !string.IsNullOrEmpty( mapName ) && MapNameRegex.IsMatch( mapName );
	}

	public bool MatchesEntities( IReadOnlyList<string> entityClassNames )
	{
		return Signatures.Overlaps( entityClassNames );
	}
}