namespace SeaHaven.DataServices.Helpers
{
    public static class WorkOrderBoardRegions
    {
        public static readonly IReadOnlyList<string> Names =
            ["East", "Central", "West", "California", "Unmapped/Other"];

        private static readonly IReadOnlyDictionary<string, string[]> RegionStateCodes =
            new Dictionary<string, string[]>(StringComparer.Ordinal)
            {
                ["East"] = ["CT", "DE", "GA", "ME", "MD", "MA", "NH", "NJ", "NY", "NC", "PA", "RI", "SC", "VT", "VA", "WV"],
                ["Central"] = ["AL", "AR", "FL", "IL", "IN", "IA", "KS", "KY", "LA", "MI", "MN", "MS", "MO", "NE", "ND", "OH", "OK", "SD", "TN", "WI"],
                ["West"] = ["AK", "AZ", "CO", "HI", "ID", "MT", "NV", "NM", "OR", "TX", "UT", "WA", "WY"],
                ["California"] = ["CA"]
            };

        private static readonly IReadOnlyDictionary<string, string> StateNames =
            new Dictionary<string, string>(StringComparer.Ordinal)
            {
                ["AL"] = "ALABAMA",
                ["AK"] = "ALASKA",
                ["AZ"] = "ARIZONA",
                ["AR"] = "ARKANSAS",
                ["CA"] = "CALIFORNIA",
                ["CO"] = "COLORADO",
                ["CT"] = "CONNECTICUT",
                ["DE"] = "DELAWARE",
                ["FL"] = "FLORIDA",
                ["GA"] = "GEORGIA",
                ["HI"] = "HAWAII",
                ["ID"] = "IDAHO",
                ["IL"] = "ILLINOIS",
                ["IN"] = "INDIANA",
                ["IA"] = "IOWA",
                ["KS"] = "KANSAS",
                ["KY"] = "KENTUCKY",
                ["LA"] = "LOUISIANA",
                ["ME"] = "MAINE",
                ["MD"] = "MARYLAND",
                ["MA"] = "MASSACHUSETTS",
                ["MI"] = "MICHIGAN",
                ["MN"] = "MINNESOTA",
                ["MS"] = "MISSISSIPPI",
                ["MO"] = "MISSOURI",
                ["MT"] = "MONTANA",
                ["NE"] = "NEBRASKA",
                ["NV"] = "NEVADA",
                ["NH"] = "NEW HAMPSHIRE",
                ["NJ"] = "NEW JERSEY",
                ["NM"] = "NEW MEXICO",
                ["NY"] = "NEW YORK",
                ["NC"] = "NORTH CAROLINA",
                ["ND"] = "NORTH DAKOTA",
                ["OH"] = "OHIO",
                ["OK"] = "OKLAHOMA",
                ["OR"] = "OREGON",
                ["PA"] = "PENNSYLVANIA",
                ["RI"] = "RHODE ISLAND",
                ["SC"] = "SOUTH CAROLINA",
                ["SD"] = "SOUTH DAKOTA",
                ["TN"] = "TENNESSEE",
                ["TX"] = "TEXAS",
                ["UT"] = "UTAH",
                ["VT"] = "VERMONT",
                ["VA"] = "VIRGINIA",
                ["WA"] = "WASHINGTON",
                ["WV"] = "WEST VIRGINIA",
                ["WI"] = "WISCONSIN",
                ["WY"] = "WYOMING"
            };

        public static IReadOnlyCollection<string> StorageValuesFor(string region)
            => RegionStateCodes.TryGetValue(region, out var codes)
                ? codes.SelectMany(code => new[] { code, StateNames[code] }).ToArray()
                : Array.Empty<string>();

        public static IReadOnlySet<string> KnownStorageValues { get; } =
            RegionStateCodes.Values
                .SelectMany(codes => codes.SelectMany(code => new[] { code, StateNames[code] }))
                .ToHashSet(StringComparer.Ordinal);
    }
}