using System.Collections.Frozen;

namespace decePubClient.Helpers;

/// <summary>
/// A point inside each country (ISO 3166-1 alpha-2), for servers PrivaPub places only by country: the spherical mean of
/// the country's zones in the tz database's zone.tab (public domain, tzdata 2026c). Regenerate it from a newer zone.tab
/// the same way when a country code is missing.
/// </summary>
public static class CountryPoints
{
	public static readonly FrozenDictionary<string, (double Latitude, double Longitude)> All = new Dictionary<string, (double, double)>
	{
		["AD"] = (42.5, 1.5), ["AE"] = (25.3, 55.3), ["AF"] = (34.5, 69.2), ["AG"] = (17.1, -61.8), ["AI"] = (18.2, -63.1), ["AL"] = (41.3, 19.8),
		["AM"] = (40.2, 44.5), ["AO"] = (-8.8, 13.2), ["AQ"] = (-82.9, 67.0), ["AR"] = (-33.6, -65.9), ["AS"] = (-14.3, -170.7), ["AT"] = (48.2, 16.3),
		["AU"] = (-33.2, 142.8), ["AW"] = (12.5, -70.0), ["AX"] = (60.1, 19.9), ["AZ"] = (40.4, 49.9), ["BA"] = (43.9, 18.4), ["BB"] = (13.1, -59.6),
		["BD"] = (23.7, 90.4), ["BE"] = (50.8, 4.3), ["BF"] = (12.4, -1.5), ["BG"] = (42.7, 23.3), ["BH"] = (26.4, 50.6), ["BI"] = (-3.4, 29.4),
		["BJ"] = (6.5, 2.6), ["BL"] = (17.9, -62.8), ["BM"] = (32.3, -64.8), ["BN"] = (4.9, 114.9), ["BO"] = (-16.5, -68.2), ["BQ"] = (12.2, -68.3),
		["BR"] = (-8.6, -50.7), ["BS"] = (25.1, -77.3), ["BT"] = (27.5, 89.7), ["BW"] = (-24.7, 25.9), ["BY"] = (53.9, 27.6), ["BZ"] = (17.5, -88.2),
		["CA"] = (57.9, -93.3), ["CC"] = (-12.2, 96.9), ["CD"] = (-8.0, 21.3), ["CF"] = (4.4, 18.6), ["CG"] = (-4.3, 15.3), ["CH"] = (47.4, 8.5),
		["CI"] = (5.3, -4.0), ["CK"] = (-21.2, -159.8), ["CL"] = (-41.1, -82.2), ["CM"] = (4.0, 9.7), ["CN"] = (38.7, 106.0), ["CO"] = (4.6, -74.1),
		["CR"] = (9.9, -84.1), ["CU"] = (23.1, -82.4), ["CV"] = (14.9, -23.5), ["CW"] = (12.2, -69.0), ["CX"] = (-10.4, 105.7), ["CY"] = (35.1, 33.7),
		["CZ"] = (50.1, 14.4), ["DE"] = (50.1, 10.9), ["DJ"] = (11.6, 43.1), ["DK"] = (55.7, 12.6), ["DM"] = (15.3, -61.4), ["DO"] = (18.5, -69.9),
		["DZ"] = (36.8, 3.0), ["EC"] = (-1.5, -84.7), ["EE"] = (59.4, 24.8), ["EG"] = (30.1, 31.3), ["EH"] = (27.2, -13.2), ["ER"] = (15.3, 38.9),
		["ES"] = (34.9, -8.4), ["ET"] = (9.0, 38.7), ["FI"] = (60.2, 25.0), ["FJ"] = (-18.1, 178.4), ["FK"] = (-51.7, -57.9), ["FM"] = (6.6, 157.7),
		["FO"] = (62.0, -6.8), ["FR"] = (48.9, 2.3), ["GA"] = (0.4, 9.4), ["GB"] = (51.5, -0.1), ["GD"] = (12.1, -61.8), ["GE"] = (41.7, 44.8),
		["GF"] = (4.9, -52.3), ["GG"] = (49.5, -2.5), ["GH"] = (5.6, -0.2), ["GI"] = (36.1, -5.3), ["GL"] = (73.0, -40.7), ["GM"] = (13.5, -16.6),
		["GN"] = (9.5, -13.7), ["GP"] = (16.2, -61.5), ["GQ"] = (3.7, 8.8), ["GR"] = (38.0, 23.7), ["GS"] = (-54.3, -36.5), ["GT"] = (14.6, -90.5),
		["GU"] = (13.5, 144.8), ["GW"] = (11.8, -15.6), ["GY"] = (6.8, -58.2), ["HK"] = (22.3, 114.2), ["HN"] = (14.1, -87.2), ["HR"] = (45.8, 16.0),
		["HT"] = (18.5, -72.3), ["HU"] = (47.5, 19.1), ["ID"] = (-3.6, 119.0), ["IE"] = (53.3, -6.2), ["IL"] = (31.8, 35.2), ["IM"] = (54.1, -4.5),
		["IN"] = (22.5, 88.4), ["IO"] = (-7.3, 72.4), ["IQ"] = (33.4, 44.4), ["IR"] = (35.7, 51.4), ["IS"] = (64.2, -21.9), ["IT"] = (41.9, 12.5),
		["JE"] = (49.2, -2.1), ["JM"] = (18.0, -76.8), ["JO"] = (32.0, 35.9), ["JP"] = (35.7, 139.7), ["KE"] = (-1.3, 36.8), ["KG"] = (42.9, 74.6),
		["KH"] = (11.6, 104.9), ["KI"] = (0.2, -172.0), ["KM"] = (-11.7, 43.3), ["KN"] = (17.3, -62.7), ["KP"] = (39.0, 125.7), ["KR"] = (37.5, 127.0),
		["KW"] = (29.3, 48.0), ["KY"] = (19.3, -81.4), ["KZ"] = (48.1, 59.7), ["LA"] = (18.0, 102.6), ["LB"] = (33.9, 35.5), ["LC"] = (14.0, -61.0),
		["LI"] = (47.1, 9.5), ["LK"] = (6.9, 79.8), ["LR"] = (6.3, -10.8), ["LS"] = (-29.5, 27.5), ["LT"] = (54.7, 25.3), ["LU"] = (49.6, 6.2),
		["LV"] = (57.0, 24.1), ["LY"] = (32.9, 13.2), ["MA"] = (33.6, -7.6), ["MC"] = (43.7, 7.4), ["MD"] = (47.0, 28.8), ["ME"] = (42.4, 19.3),
		["MF"] = (18.1, -63.1), ["MG"] = (-18.9, 47.5), ["MH"] = (8.1, 169.3), ["MK"] = (42.0, 21.4), ["ML"] = (12.7, -8.0), ["MM"] = (16.8, 96.2),
		["MN"] = (48.2, 99.3), ["MO"] = (22.2, 113.5), ["MP"] = (15.2, 145.8), ["MQ"] = (14.6, -61.1), ["MR"] = (18.1, -16.0), ["MS"] = (16.7, -62.2),
		["MT"] = (35.9, 14.5), ["MU"] = (-20.2, 57.5), ["MV"] = (4.2, 73.5), ["MW"] = (-15.8, 35.0), ["MX"] = (25.9, -102.3), ["MY"] = (2.4, 106.0),
		["MZ"] = (-26.0, 32.6), ["NA"] = (-22.6, 17.1), ["NC"] = (-22.3, 166.4), ["NE"] = (13.5, 2.1), ["NF"] = (-29.1, 168.0), ["NG"] = (6.4, 3.4),
		["NI"] = (12.2, -86.3), ["NL"] = (52.4, 4.9), ["NO"] = (59.9, 10.8), ["NP"] = (27.7, 85.3), ["NR"] = (-0.5, 166.9), ["NU"] = (-19.0, -169.9),
		["NZ"] = (-40.5, 178.9), ["OM"] = (23.6, 58.6), ["PA"] = (9.0, -79.5), ["PE"] = (-12.1, -77.0), ["PF"] = (-16.6, -141.4), ["PG"] = (-7.9, 151.4),
		["PH"] = (14.6, 121.0), ["PK"] = (24.9, 67.0), ["PL"] = (52.2, 21.0), ["PM"] = (47.0, -56.3), ["PN"] = (-25.1, -130.1), ["PR"] = (18.5, -66.1),
		["PS"] = (31.5, 34.8), ["PT"] = (36.5, -17.3), ["PW"] = (7.3, 134.5), ["PY"] = (-25.3, -57.7), ["QA"] = (25.3, 51.5), ["RE"] = (-20.9, 55.5),
		["RO"] = (44.4, 26.1), ["RS"] = (44.8, 20.5), ["RU"] = (63.0, 90.5), ["RW"] = (-1.9, 30.1), ["SA"] = (24.6, 46.7), ["SB"] = (-9.5, 160.2),
		["SC"] = (-4.7, 55.5), ["SD"] = (15.6, 32.5), ["SE"] = (59.3, 18.1), ["SG"] = (1.3, 103.8), ["SH"] = (-15.9, -5.7), ["SI"] = (46.0, 14.5),
		["SJ"] = (78.0, 16.0), ["SK"] = (48.1, 17.1), ["SL"] = (8.5, -13.2), ["SM"] = (43.9, 12.5), ["SN"] = (14.7, -17.4), ["SO"] = (2.1, 45.4),
		["SR"] = (5.8, -55.2), ["SS"] = (4.8, 31.6), ["ST"] = (0.3, 6.7), ["SV"] = (13.7, -89.2), ["SX"] = (18.1, -63.0), ["SY"] = (33.5, 36.3),
		["SZ"] = (-26.3, 31.1), ["TC"] = (21.5, -71.1), ["TD"] = (12.1, 15.1), ["TF"] = (-49.4, 70.2), ["TG"] = (6.1, 1.2), ["TH"] = (13.7, 100.5),
		["TJ"] = (38.6, 68.8), ["TK"] = (-9.4, -171.2), ["TL"] = (-8.6, 125.6), ["TM"] = (38.0, 58.4), ["TN"] = (36.8, 10.2), ["TO"] = (-21.1, -175.2),
		["TR"] = (41.0, 29.0), ["TT"] = (10.7, -61.5), ["TV"] = (-8.5, 179.2), ["TW"] = (25.1, 121.5), ["TZ"] = (-6.8, 39.3), ["UA"] = (47.7, 32.4),
		["UG"] = (0.3, 32.4), ["UM"] = (24.0, 174.3), ["US"] = (47.3, -104.5), ["UY"] = (-34.9, -56.2), ["UZ"] = (40.5, 68.0), ["VA"] = (41.9, 12.5),
		["VC"] = (13.2, -61.2), ["VE"] = (10.5, -66.9), ["VG"] = (18.5, -64.6), ["VI"] = (18.4, -64.9), ["VN"] = (10.8, 106.7), ["VU"] = (-17.7, 168.4),
		["WF"] = (-13.3, -176.2), ["WS"] = (-13.8, -171.7), ["YE"] = (12.8, 45.2), ["YT"] = (-12.8, 45.2), ["ZA"] = (-26.2, 28.0), ["ZM"] = (-15.4, 28.3),
		["ZW"] = (-17.8, 31.1)
	}.ToFrozenDictionary(StringComparer.OrdinalIgnoreCase);

	public static (double Latitude, double Longitude)? Of(string countryCode) =>
		countryCode is { Length: 2 } && All.TryGetValue(countryCode, out var point) ? point : null;
}