using System.Net;
using System.Net.Http.Headers;
using System.Net.Http.Json;
using Campaign_Tracker.Server.Audit;
using Microsoft.Extensions.DependencyInjection;

namespace Campaign_Tracker.Server.Tests;

public sealed class MunicipalityProfileControllerTests
{
    // ── AC #1: profile created and saved with legacy link ────────────────────

    [Fact]
    public async Task CreateProfile_ValidJCode_Returns200WithCombinedView_AC1_AC2()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        var response = await client.PostAsJsonAsync("/api/municipalities/profiles", new
        {
            jCode = "FAIR01",
            displayName = "Fairview Borough Profile",
        });

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var body = await response.Content.ReadFromJsonAsync<MunicipalityProfileDto>();
        Assert.NotNull(body);
        Assert.Equal("FAIR01", body.JCode);
        Assert.Equal("Fairview Borough Profile", body.DisplayName);
        // AC #2: combined view includes resolved legacy name
        Assert.Equal("Fairview Borough", body.LegacyName);
    }

    // ── AC #2: list returns combined extension + legacy fields ────────────────

    [Fact]
    public async Task GetAllProfiles_ReturnsResolvedLegacyData_AC2()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        await client.PostAsJsonAsync("/api/municipalities/profiles", new { jCode = "LAKE02", displayName = (string?)null });

        var response = await client.GetAsync("/api/municipalities/profiles");
        Assert.Equal(HttpStatusCode.OK, response.StatusCode);

        var profiles = await response.Content.ReadFromJsonAsync<MunicipalityProfileDto[]>();
        Assert.NotNull(profiles);
        var lake = Assert.Single(profiles, p => p.JCode == "LAKE02");
        Assert.Equal("Lake Township", lake.LegacyName);
    }

    // ── AC #3: update audits the change (server-side; response includes actor) ─

    [Fact]
    public async Task UpdateProfile_ChangesDisplayName_Returns200_AC3()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        var created = await (await client.PostAsJsonAsync("/api/municipalities/profiles",
            new { jCode = "FAIR01", displayName = "Old Name" }))
            .Content.ReadFromJsonAsync<MunicipalityProfileDto>();

        var response = await client.PutAsJsonAsync(
            $"/api/municipalities/profiles/{created!.ProfileId}",
            new { displayName = "New Name" });

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
        var updated = await response.Content.ReadFromJsonAsync<MunicipalityProfileDto>();
        Assert.Equal("New Name", updated!.DisplayName);
    }

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

    [Fact]
    public async Task CreateProfile_InvalidJCode_Returns422WithDescription_AC4()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        var response = await client.PostAsJsonAsync("/api/municipalities/profiles", new
        {
            jCode = "DOESNOTEXIST",
            displayName = (string?)null,
        });

        Assert.Equal(HttpStatusCode.UnprocessableEntity, response.StatusCode);
        var body = await response.Content.ReadFromJsonAsync<MunicipalityProfileProblemDto>();
        Assert.NotNull(body);
        Assert.Contains("DOESNOTEXIST", body.Error);
    }

    // ── Authorization ─────────────────────────────────────────────────────────

    [Fact]
    public async Task CreateProfile_NoToken_Returns401()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();

        var response = await client.PostAsJsonAsync("/api/municipalities/profiles",
            new { jCode = "FAIR01", displayName = (string?)null });

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

    [Fact]
    public async Task CreateProfile_WrongRoleToken_Returns403()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("prod@example.test", "production"));

        var response = await client.PostAsJsonAsync("/api/municipalities/profiles",
            new { jCode = "FAIR01", displayName = (string?)null });

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

    [Fact]
    public async Task GetJurisdictions_NoToken_Returns401()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();

        var response = await client.GetAsync("/api/municipalities/jurisdictions");

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

    // ── AC #3: audit events recorded on create and update ────────────────────

    [Fact]
    public async Task CreateProfile_RecordsAuditEvent_AC3()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        await client.PostAsJsonAsync("/api/municipalities/profiles",
            new { jCode = "FAIR01", displayName = "Fairview" });

        var auditService = factory.Services.GetRequiredService<IAuditService>();
        var events = auditService.GetRecent();
        Assert.Contains(events, e =>
            e.EventType == "MUNICIPALITY_PROFILE_CREATED" &&
            e.ActorIdentity == "cs@example.test");
    }

    [Fact]
    public async Task UpdateProfile_RecordsAuditEvent_AC3()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        var created = await (await client.PostAsJsonAsync("/api/municipalities/profiles",
            new { jCode = "LAKE02", displayName = (string?)null }))
            .Content.ReadFromJsonAsync<MunicipalityProfileDto>();

        await client.PutAsJsonAsync(
            $"/api/municipalities/profiles/{created!.ProfileId}",
            new { displayName = "Updated Name" });

        var auditService = factory.Services.GetRequiredService<IAuditService>();
        var events = auditService.GetRecent();
        Assert.Contains(events, e =>
            e.EventType == "MUNICIPALITY_PROFILE_UPDATED" &&
            e.ActorIdentity == "cs@example.test");
    }

    // ── Update not-found returns 404 ─────────────────────────────────────────

    [Fact]
    public async Task UpdateProfile_UnknownId_Returns404()
    {
        await using var factory = new AuthIntegrationTestFactory();
        using var client = factory.CreateClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
            "Bearer", AuthIntegrationTestFactory.CreateToken("cs@example.test", "client-services"));

        var response = await client.PutAsJsonAsync(
            "/api/municipalities/profiles/does-not-exist",
            new { displayName = "X" });

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

    // ── Local DTOs for deserialization ────────────────────────────────────────

    private sealed record MunicipalityProfileDto(
        string ProfileId,
        string JCode,
        string? DisplayName,
        string UpdatedAt,
        string UpdatedBy,
        string? LegacyName,
        string? LegacyMailingAddress,
        string? LegacyCityStateZip);

    private sealed record MunicipalityProfileProblemDto(string Error);
}