using ControlPlane.Core.Config;
using ControlPlane.Core.Interfaces;
using ControlPlane.Core.Models;
using ControlPlane.Worker.Services;
using Microsoft.Extensions.Options;

namespace ControlPlane.Worker.Steps;

public class KeycloakStep(
    KeycloakAdminClient adminClient,
    IConfiguration config,
    IOptions<ClarityInfraOptions> infraOptions,
    ILogger<KeycloakStep> logger) : ISagaStep
{
    public string StepName => "Identity Bootstrapping (Keycloak)";

    public async Task ExecuteAsync(SagaContext context, CancellationToken cancellationToken)
    {
        var realmId = RealmId(context);

        logger.LogInformation("[{JobId}] Creating Keycloak realm {Realm}.", context.Job.Id, realmId);
        await adminClient.CreateRealmAsync(realmId, context.Job.ClientName, cancellationToken);

        logger.LogInformation("[{JobId}] Creating AgencyAdmin role.", context.Job.Id);
        await adminClient.CreateRealmRoleAsync(realmId, "AgencyAdmin", "Day-zero administrator for this Clarity tenant.", cancellationToken);

        // Derive the tenant's public-facing origin from ClarityInfraOptions.
        var tenantOrigin = infraOptions.Value.TenantPublicUrl(context.Job.Subdomain);

        logger.LogInformation("[{JobId}] Creating Keycloak clients for realm {Realm} (origin: {Origin}).",
            context.Job.Id, realmId, tenantOrigin);

        // clarity-rest-api: bearer-only resource server — just registers the audience so JWT validation passes.
        await adminClient.CreateClientAsync(realmId, new
        {
            clientId              = "clarity-rest-api",
            name                  = "Clarity REST API",
            enabled               = true,
            bearerOnly            = true,
            publicClient          = false,
        }, cancellationToken);

        // clarity-web-app: public OIDC client used by the React frontend.
        // fdev is a developer dogfood environment — allow localhost redirect URIs so that a
        // local Aspire dev loop (any port) can complete the OIDC flow against the shared
        // OPC infra Keycloak without any post-provisioning patching.
        var isFdev = string.Equals(context.Job.Environment, "fdev", StringComparison.OrdinalIgnoreCase);
        var redirectUris = isFdev
            ? new[] { $"{tenantOrigin}/*", "http://localhost:*/*", "http://*.dev.localhost:*/*" }
            : new[] { $"{tenantOrigin}/*" };
        var webOrigins = isFdev
            ? "+"          // match all valid redirect URI origins
            : tenantOrigin;

        await adminClient.CreateClientAsync(realmId, new
        {
            clientId                  = "clarity-web-app",
            name                      = "Clarity Web App",
            enabled                   = true,
            publicClient              = true,
            standardFlowEnabled       = true,
            directAccessGrantsEnabled = false,
            rootUrl                   = tenantOrigin,
            baseUrl                   = "/",
            redirectUris,
            webOrigins                = new[] { webOrigins },
        }, cancellationToken);

        // Ensure tokens issued by clarity-web-app include "clarity-rest-api" in the `aud` claim
        // so that Clarity.Server JWT bearer validation (Audience = "clarity-rest-api") passes.
        logger.LogInformation("[{JobId}] Adding audience mapper for clarity-rest-api on clarity-web-app.", context.Job.Id);
        var webAppUuid = await adminClient.GetClientUuidAsync(realmId, "clarity-web-app", cancellationToken);
        await adminClient.AddAudienceMapperAsync(realmId, webAppUuid, "clarity-rest-api", cancellationToken);

        logger.LogInformation("[{JobId}] Creating day-zero user {Email}.", context.Job.Id, context.Job.AdminEmail);
        var userId = await adminClient.CreateUserAsync(realmId, context.Job.AdminEmail, context.Job.ClientName, cancellationToken);

        logger.LogInformation("[{JobId}] Assigning AgencyAdmin role.", context.Job.Id);
        await adminClient.AssignRealmRoleAsync(realmId, userId, "AgencyAdmin", cancellationToken);

        // TODO No SMTP right now
        //logger.LogInformation("[{JobId}] Sending required actions email to {Email}.", context.Job.Id, context.Job.AdminEmail);
        //await adminClient.SendRequiredActionsEmailAsync(realmId, userId, ["UPDATE_PASSWORD", "VERIFY_EMAIL"], cancellationToken);

        context.DayZeroUserSubjectId = userId;
        //context.MagicLink            = $"Action email sent to {context.Job.AdminEmail} for realm '{realmId}'.";
        context.Job.CompletedSteps  |= CompletedSteps.KeycloakProvisioned;

        logger.LogInformation("[{JobId}] Keycloak provisioning complete for realm {Realm}.", context.Job.Id, realmId);
    }

    public async Task CompensateAsync(SagaContext context, CancellationToken cancellationToken)
    {
        var realmId = RealmId(context);
        logger.LogWarning("[{JobId}] Compensating Keycloak - deleting realm {Realm}.", context.Job.Id, realmId);
        await adminClient.DeleteRealmAsync(realmId, cancellationToken);
    }

    private static string RealmId(SagaContext context) =>
        $"clarity-{context.Job.Subdomain.ToLowerInvariant()}";
}