using FluentAssertions;
using Oms.Application.Dtos.Orders;
using Oms.Application.Shared;
using Oms.Domain.ChannelsAggregate.Entities;

namespace Oms.Tests;

public class GeoPartitionMatcherTests
{
    [Fact]
    public void ZipPrefix_LongerPrefixWins()
    {
        var rules = CompileEntities(
            Zip("US", "9"),
            Zip("US", "90"));

        var hit = GeoPartitionMatcher.MatchEntity(rules, "US", "CA", "LA", "90001");
        hit!.LeftPostcode.Should().Be("90");
    }

    [Fact]
    public void ZipPresent_ShouldSkipStateAndCity()
    {
        var rules = CompileEntities(
            State("US", "CA"),
            City("US", "CA", "LA"));

        GeoPartitionMatcher.MatchEntity(rules, "US", "CA", "LA", "90001").Should().BeNull();
    }

    [Fact]
    public void ZipEmpty_StateExact_ShouldHit()
    {
        var rules = CompileEntities(
            Zip("US", "90"),
            State("US", "CA"));

        var hit = GeoPartitionMatcher.MatchEntity(rules, "US", "CA", "LA", null);
        hit!.Province.Should().Be("CA");
        hit.LeftPostcode.Should().BeNull();
    }

    [Fact]
    public void ZipEmpty_CityRequiresState()
    {
        var rules = CompileEntities(City("US", "CA", "LOSANGELES"));

        GeoPartitionMatcher.MatchEntity(rules, "US", "NY", "LOSANGELES", null).Should().BeNull();
        GeoPartitionMatcher.MatchEntity(rules, "US", "CA", "LOSANGELES", null).Should().NotBeNull();
    }

    [Fact]
    public void ZipRange_ShouldBeClosedInterval()
    {
        var rules = CompileEntities(Range("US", "90000", "90199"));

        GeoPartitionMatcher.IsHit(rules, "US", null, null, "90000").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "90199").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "90200").Should().BeFalse();
    }

    [Fact]
    public void ZipRange_NumericDifferentLength_ShouldCompareAsNumbers()
    {
        var rules = CompileEntities(Range("US", "9", "10"));

        GeoPartitionMatcher.IsHit(rules, "US", null, null, "9").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "10").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "8").Should().BeFalse();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "11").Should().BeFalse();
    }

    [Fact]
    public void ZipRange_LeadingZeros_ShouldKeepZipWidth()
    {
        var rules = CompileEntities(Range("US", "02100", "02200"));

        GeoPartitionMatcher.IsHit(rules, "US", null, null, "02115").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "02100").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "02200").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "US", null, null, "02099").Should().BeFalse();
    }

    [Fact]
    public void ZipRange_AlphaNumericPrefix_ShouldCompareNumericTail()
    {
        var rules = CompileEntities(Range("GB", "YO0", "YO9"));

        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "YO0").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "YO9").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "YO10").Should().BeFalse();
    }

    [Fact]
    public void CountryFallback_ShouldHitWhenZipMisses()
    {
        var rules = CompileEntities(
            Range("US", "10000", "19999"),
            CountryOnly("US"));

        var hit = GeoPartitionMatcher.MatchEntity(rules, "US", "CA", null, "90001");
        hit!.LeftPostcode.Should().BeNull();
        hit.Province.Should().BeNull();
    }

    [Fact]
    public void ThreePartitions_ShouldNotInterfere()
    {
        var black = CompileEntities(Range("US", "90000", "90010"));
        var remote = CompileEntities(Range("US", "05999", "06999"));
        var price = CompileEntities(Zip("US", "90"));

        GeoPartitionMatcher.IsHit(black, "US", null, null, "90005").Should().BeTrue();
        GeoPartitionMatcher.IsHit(remote, "US", null, null, "90005").Should().BeFalse();
        GeoPartitionMatcher.MatchEntity(price, "US", null, null, "90005")!.LeftPostcode.Should().Be("90");
    }

    [Fact]
    public void SnapshotLegacyLeftOpenFormat_ShouldParseAsClosed()
    {
        var infos = new List<KpiAreaSnapshotRuleDto>
        {
            new() { Id = 1, CountryCode = "US", PostcodeRange = "(00000,50000]" }
        };

        GeoPartitionMatcher.IsHit(infos, "US", null, null, "00000").Should().BeTrue();
        GeoPartitionMatcher.IsHit(infos, "US", null, null, "50000").Should().BeTrue();
        GeoPartitionMatcher.IsHit(infos, "US", null, null, "50001").Should().BeFalse();
    }

    [Fact]
    public void PrepareEntity_PrefixKeepsRightEmpty()
    {
        var entity = new KpiAreaInfo { CountryCode = "us", LeftPostcode = "90" };
        GeoPartitionMatcher.PrepareEntity(entity);
        entity.LeftPostcode.Should().Be("90");
        entity.RightPostcode.Should().BeNull();
        entity.MatchDim.Should().Be("zip");
        entity.MatchMode.Should().Be("prefix");
        entity.PrefixLen.Should().Be(2);
        GeoPartitionMatcher.Describe(entity).MatchDim.Should().Be("zip");
        GeoPartitionMatcher.Describe(entity).MatchMode.Should().Be("prefix");
    }

    [Fact]
    public void PrepareEntity_CityWithoutState_ShouldThrow()
    {
        var entity = new KpiAreaInfo { CountryCode = "US", City = "LA" };
        var act = () => GeoPartitionMatcher.PrepareEntity(entity);
        act.Should().Throw<InvalidOperationException>().WithMessage("*州*");
    }

    [Theory]
    [InlineData("BT9 7AA", "BT97AA")]
    [InlineData("bt97aa", "BT97AA")]
    [InlineData("BT9-7AA", "BT97AA")]
    [InlineData("B46 3AB", "B463AB")]
    [InlineData(" b46  3ab ", "B463AB")]
    public void NormalizeZip_AlphanumericWithSpaces_ShouldStripAndUpper(string raw, string expected)
    {
        GeoPartitionMatcher.NormalizeZip(raw).Should().Be(expected);
    }

    [Fact]
    public void Gb_Bt97aa_LongerOutwardPrefixWins()
    {
        var rules = CompileEntities(
            Zip("GB", "BT"),
            Zip("GB", "BT9"),
            Zip("GB", "BT97"),
            Zip("GB", "B"));

        var hit = GeoPartitionMatcher.MatchEntity(rules, "GB", "NIR", "Belfast", "BT9 7AA");
        hit!.LeftPostcode.Should().Be("BT97");
        GeoPartitionMatcher.MatchEntity(rules, "gb", null, null, "BT97AA")!.LeftPostcode.Should().Be("BT97");
    }

    [Fact]
    public void Gb_Bt97aa_ExactIgnoresSpaces()
    {
        var rules = CompileEntities(Exact("GB", "BT9 7AA"));

        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT97AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT9 7AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT9 7AB").Should().BeFalse();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT98AA").Should().BeFalse();
    }

    [Fact]
    public void Gb_Bt97aa_ClosedAlphanumericRange()
    {
        var rules = CompileEntities(Range("GB", "BT90AA", "BT99ZZ"));

        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT97AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT9 7AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT90AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT99ZZ").Should().BeTrue();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "BT8 1AA").Should().BeFalse();
        GeoPartitionMatcher.IsHit(rules, "GB", null, null, "E1 6AN").Should().BeFalse();
    }

    [Fact]
    public void Ca_B463ab_PrefixAndSpaceVariants()
    {
        var rules = CompileEntities(
            Zip("CA", "B"),
            Zip("CA", "B4"),
            Zip("CA", "B46"),
            Zip("CA", "B463"));

        var hit = GeoPartitionMatcher.MatchEntity(rules, "CA", "ON", "Toronto", "B46 3AB");
        hit!.LeftPostcode.Should().Be("B463");
        GeoPartitionMatcher.IsHit(rules, "CA", null, null, "B463AB").Should().BeTrue();
        GeoPartitionMatcher.MatchEntity(rules, "CA", null, null, "B47 3AB")!.LeftPostcode.Should().Be("B4");
        GeoPartitionMatcher.IsHit(rules, "CA", null, null, "M5V 2T6").Should().BeFalse();
    }

    [Fact]
    public void Ca_B463ab_ExactAndRange()
    {
        var exact = CompileEntities(Exact("CA", "B46 3AB"));
        var range = CompileEntities(Range("CA", "B460AA", "B469ZZ"));

        GeoPartitionMatcher.IsHit(exact, "CA", null, null, "B46 3AB").Should().BeTrue();
        GeoPartitionMatcher.IsHit(exact, "CA", null, null, "B463AB").Should().BeTrue();
        GeoPartitionMatcher.IsHit(exact, "CA", null, null, "B46 3AC").Should().BeFalse();

        GeoPartitionMatcher.IsHit(range, "CA", null, null, "B46 3AB").Should().BeTrue();
        GeoPartitionMatcher.IsHit(range, "CA", null, null, "B46 0AA").Should().BeTrue();
        GeoPartitionMatcher.IsHit(range, "CA", null, null, "B47 3AB").Should().BeFalse();
    }

    [Fact]
    public void GbAndCa_SameLookingPostcode_CountryMustMatch()
    {
        var gb = CompileEntities(Zip("GB", "B46"), Exact("GB", "BT97AA"));
        var ca = CompileEntities(Zip("CA", "B46"));

        GeoPartitionMatcher.IsHit(gb, "GB", null, null, "B46 3AB").Should().BeTrue();
        GeoPartitionMatcher.IsHit(gb, "CA", null, null, "B46 3AB").Should().BeFalse();
        GeoPartitionMatcher.IsHit(ca, "CA", null, null, "B46 3AB").Should().BeTrue();
        GeoPartitionMatcher.IsHit(ca, "GB", null, null, "BT97AA").Should().BeFalse();
        GeoPartitionMatcher.IsHit(gb, "GB", null, null, "BT97AA").Should().BeTrue();
    }

    [Fact]
    public void Gb_Bt97aa_ZipPresent_ShouldSkipState()
    {
        var rules = CompileEntities(
            State("GB", "NIR"),
            Zip("GB", "BT1"));

        GeoPartitionMatcher.MatchEntity(rules, "GB", "NIR", "Belfast", "BT97AA").Should().BeNull();
        GeoPartitionMatcher.MatchEntity(rules, "GB", "NIR", "Belfast", null)!.Province.Should().Be("NIR");
    }

    private static List<KpiAreaInfo> CompileEntities(params KpiAreaInfo[] items)
    {
        foreach (var item in items)
        {
            GeoPartitionMatcher.PrepareEntity(item);
        }

        return items.ToList();
    }

    private static KpiAreaInfo Zip(string country, string prefix) =>
        new() { CountryCode = country, LeftPostcode = prefix };

    private static KpiAreaInfo Exact(string country, string postcode) =>
        new() { CountryCode = country, LeftPostcode = postcode, RightPostcode = postcode };

    private static KpiAreaInfo Range(string country, string left, string right) =>
        new() { CountryCode = country, LeftPostcode = left, RightPostcode = right };

    private static KpiAreaInfo State(string country, string state) =>
        new() { CountryCode = country, Province = state };

    private static KpiAreaInfo City(string country, string state, string city) =>
        new() { CountryCode = country, Province = state, City = city };

    private static KpiAreaInfo CountryOnly(string country) =>
        new() { CountryCode = country };
}