using Campaign_Tracker.Server.ExtensionData;
using Campaign_Tracker.Server.LegacyData;
using Campaign_Tracker.Server.LegacyData.Models;
using Campaign_Tracker.Server.Municipalities;

namespace Campaign_Tracker.Server.Tests;

public sealed class MunicipalityProfileRepositoryTests
{
    private static readonly DateTimeOffset FixedNow =
        new(2026, 5, 6, 12, 0, 0, TimeSpan.Zero);

    private static InMemoryMunicipalityProfileRepository BuildSut(
        ILegacyDataAccess? data = null)
    {
        data ??= new InMemoryLegacyDataAccess(
            jurisdictions:
            [
                new("FAIR01", "Fairview Borough", "100 Main St", "Fairview, PA 16415", null, null),
                new("LAKE02", "Lake Township",    "200 Lake Rd",  "Lake City, PA 16423",  null, null),
            ]);

        return new InMemoryMunicipalityProfileRepository(
            new LegacyLinkValidator(data),
            data,
            new FakeTimeProvider(FixedNow));
    }

    // ── AC #1: profile saved with required JCode link ────────────────────────

    [Fact]
    public async Task CreateAsync_ValidJCode_SavesProfileWithLegacyLink_AC1()
    {
        var sut = BuildSut();

        var result = await sut.CreateAsync("FAIR01", "Fairview Profile", "user@test.com");

        Assert.True(result.Saved);
        Assert.NotNull(result.Profile);
        Assert.Equal("FAIR01", result.Profile.JCode);
        Assert.Equal("MunicipalityProfile", result.Profile.RecordType);
        Assert.Equal(LegacyLinkType.JurisdictionJCode, result.Profile.LegacyLink.Type);
        Assert.Equal("FAIR01", result.Profile.LegacyLink.Value);
    }

    [Fact]
    public async Task CreateAsync_ProfileIdIsGeneratedGuid_AC1()
    {
        var sut = BuildSut();

        var result = await sut.CreateAsync("FAIR01", null, "user@test.com");

        Assert.NotNull(result.Profile);
        Assert.True(Guid.TryParse(result.Profile.ProfileId, out _), "ProfileId should be a valid GUID.");
    }

    // ── AC #2: combined view resolves legacy jurisdiction data ────────────────

    [Fact]
    public async Task GetAllAsync_ReturnsLegacyJurisdictionFieldsAlongsideExtensionData_AC2()
    {
        var sut = BuildSut();
        await sut.CreateAsync("FAIR01", "Fairview Display", "user@test.com");

        var views = await sut.GetAllAsync();

        Assert.Single(views);
        var view = views[0];
        Assert.Equal("FAIR01", view.Profile.JCode);
        Assert.Equal("Fairview Borough", view.LegacyName);
        Assert.Equal("100 Main St", view.LegacyMailingAddress);
        Assert.Equal("Fairview, PA 16415", view.LegacyCityStateZip);
    }

    [Fact]
    public async Task GetByIdAsync_ReturnsLegacyAndExtensionDataCombined_AC2()
    {
        var sut = BuildSut();
        var created = await sut.CreateAsync("LAKE02", null, "user@test.com");

        var view = await sut.GetByIdAsync(created.Profile!.ProfileId);

        Assert.NotNull(view);
        Assert.Equal("LAKE02", view.Profile.JCode);
        Assert.Equal("Lake Township", view.LegacyName);
    }

    [Fact]
    public async Task GetByIdAsync_UnknownId_ReturnsNull_AC2()
    {
        var sut = BuildSut();

        var view = await sut.GetByIdAsync("does-not-exist");

        Assert.Null(view);
    }

    // ── AC #3: update records actor and timestamp ─────────────────────────────

    [Fact]
    public async Task UpdateAsync_ChangesDisplayNameAndCapturesActor_AC3()
    {
        var sut = BuildSut();
        var created = await sut.CreateAsync("FAIR01", "Old Name", "creator@test.com");

        var updated = await sut.UpdateAsync(created.Profile!.ProfileId, "New Name", "updater@test.com");

        Assert.True(updated.Saved);
        Assert.Equal("New Name", updated.Profile!.DisplayName);
        Assert.Equal("updater@test.com", updated.Profile.UpdatedBy);
        Assert.Equal(FixedNow, updated.Profile.UpdatedAt);
    }

    [Fact]
    public async Task UpdateAsync_UnknownId_ReturnsFailure_AC3()
    {
        var sut = BuildSut();

        var result = await sut.UpdateAsync("ghost-id", "name", "actor");

        Assert.False(result.Saved);
        Assert.Contains("ghost-id", result.Error);
    }

    // ── AC #4: invalid JCode rejected before save ─────────────────────────────

    [Fact]
    public async Task CreateAsync_InvalidJCode_ReturnsFailureWithDescription_AC4()
    {
        var sut = BuildSut(new InMemoryLegacyDataAccess(jurisdictions: []));

        var result = await sut.CreateAsync("UNKNOWN", null, "user@test.com");

        Assert.False(result.Saved);
        Assert.NotNull(result.Error);
        Assert.Contains("UNKNOWN", result.Error);
    }

    [Fact]
    public async Task CreateAsync_BlankJCode_ReturnsFailureWithDescription_AC4()
    {
        var sut = BuildSut();

        var result = await sut.CreateAsync("", null, "user@test.com");

        Assert.False(result.Saved);
        Assert.NotNull(result.Error);
    }

    [Fact]
    public async Task CreateAsync_DuplicateJCode_ReturnsFailure_AC4()
    {
        var sut = BuildSut();
        await sut.CreateAsync("FAIR01", null, "user@test.com");

        var second = await sut.CreateAsync("FAIR01", "Another", "user@test.com");

        Assert.False(second.Saved);
        Assert.Contains("FAIR01", second.Error);
    }

    // ── ILegacyLinkedRecordProvider participates in integrity check ──────────

    [Fact]
    public async Task GetAllAsync_AsLinkedRecordProvider_ReturnsProfilesForIntegrityCheck_AC1()
    {
        var sut = BuildSut();
        await sut.CreateAsync("FAIR01", null, "user@test.com");
        await sut.CreateAsync("LAKE02", null, "user@test.com");

        var provider = (ILegacyLinkedRecordProvider)sut;
        var records = await provider.GetAllAsync();

        Assert.Equal(2, records.Count);
        Assert.All(records, r =>
        {
            Assert.Equal("MunicipalityProfile", r.RecordType);
            Assert.Equal(LegacyLinkType.JurisdictionJCode, r.LegacyLink.Type);
        });
    }

    // ── Helpers ───────────────────────────────────────────────────────────────

    private sealed class FakeTimeProvider(DateTimeOffset utcNow) : TimeProvider
    {
        public override DateTimeOffset GetUtcNow() => utcNow;
    }
}