using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;

namespace Campaign_Tracker.Server.Tests;

public sealed class MunicipalityPriorCycleDefaultsControllerTests
{
    [Fact]
    public async Task GetDefaults_WithPriorCycles_ReturnsMostRecentSelectedAndReadOnlyServices_AC1_AC2()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = CreateClient(factory);
        var profile = await CreateProfile(client, "LAKE02");

        var response = await client.GetAsync(
            $"/api/municipalities/{profile.ProfileId}/prior-cycle-defaults");

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var body = await response.Content.ReadFromJsonAsync<PriorCycleDefaultsDto>();
        Assert.NotNull(body);
        Assert.True(body.HasPriorCycles);
        Assert.Equal(2, body.Cycles.Length);
        Assert.Equal(body.Cycles[0].CycleId, body.SelectedCycleId);
        Assert.True(body.Cycles[0].CompletedAt.CompareTo(body.Cycles[1].CompletedAt) > 0);
        Assert.NotEmpty(body.Cycles[0].Services);
        Assert.All(body.Cycles[0].Services, service => Assert.NotEmpty(service.Values));
    }

    [Fact]
    public async Task GetDefaults_NoPriorCycles_ReturnsClearEmptyState_AC3()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = CreateClient(factory);
        var profile = await CreateProfile(client, "PINE03");

        var response = await client.GetAsync(
            $"/api/municipalities/{profile.ProfileId}/prior-cycle-defaults");

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var body = await response.Content.ReadFromJsonAsync<PriorCycleDefaultsDto>();
        Assert.NotNull(body);
        Assert.False(body.HasPriorCycles);
        Assert.Equal("No prior cycle defaults available.", body.EmptyStateMessage);
        Assert.Empty(body.Cycles);
        Assert.Null(body.SelectedCycleId);
    }

    [Fact]
    public async Task GetDefaults_UnknownProfile_Returns404()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = CreateClient(factory);

        var response = await client.GetAsync(
            "/api/municipalities/does-not-exist/prior-cycle-defaults");

        Assert.Equal(HttpStatusCode.NotFound, response.StatusCode);
    }

    private static HttpClient CreateClient(AuthIntegrationTestFactory factory)
    {
        var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));
        return client;
    }

    private static async Task<MunicipalityProfileDto> CreateProfile(HttpClient client, string jCode)
    {
        var created = await (await client.PostAsJsonAsync("/api/municipalities/profiles", new
        {
            jCode,
            displayName = (string?)null,
        })).Content.ReadFromJsonAsync<MunicipalityProfileDto>();

        Assert.NotNull(created);
        return created;
    }

    private sealed record MunicipalityProfileDto(string ProfileId);

    private sealed record PriorCycleDefaultsDto(
        string ProfileId,
        bool HasPriorCycles,
        string? SelectedCycleId,
        string EmptyStateMessage,
        PriorCycleDto[] Cycles);

    private sealed record PriorCycleDto(
        string CycleId,
        string CycleName,
        string CompletedAt,
        PriorCycleServiceDto[] Services);

    private sealed record PriorCycleServiceDto(
        string ServiceType,
        string Summary,
        Dictionary<string, string> Values);
}