<?php

declare(strict_types=1);

namespace App\Services\Verification;

use App\Jobs\ProviderConnectionHealthCheckJob;
use App\Models\OperationRun;
use App\Models\ProviderConnection;
use App\Models\Tenant;
use App\Models\User;
use App\Services\Providers\ProviderConnectionResolver;
use App\Services\Providers\ProviderConnectionStateProjector;
use App\Services\Providers\ProviderIdentityResolver;
use App\Services\Providers\ProviderOperationStartGate;
use App\Services\Providers\ProviderOperationStartResult;
use App\Support\Auth\Capabilities;
use App\Support\Operations\ExecutionAuthorityMode;
use App\Support\Providers\ProviderVerificationStatus;
use Illuminate\Support\Facades\Gate;
use InvalidArgumentException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

final class StartVerification
{
    public function __construct(
        private readonly ProviderOperationStartGate $providers,
        private readonly ProviderConnectionResolver $connections,
        private readonly ProviderIdentityResolver $identityResolver,
        private readonly ProviderConnectionStateProjector $stateProjector,
    ) {}

    /**
     * Start (or dedupe) a provider-connection verification run.
     *
     * @param  array<string, mixed>  $extraContext
     */
    public function providerConnectionCheck(
        Tenant $tenant,
        ProviderConnection $connection,
        User $initiator,
        array $extraContext = [],
    ): ProviderOperationStartResult {
        return $this->providerConnectionCheckUsingConnection(
            tenant: $tenant,
            connection: $connection,
            initiator: $initiator,
            extraContext: $extraContext,
        );
    }

    /**
     * Start (or dedupe) a provider-connection verification run for the tenant default connection.
     *
     * @param  array<string, mixed>  $extraContext
     */
    public function providerConnectionCheckForTenant(
        Tenant $tenant,
        User $initiator,
        array $extraContext = [],
    ): ProviderOperationStartResult {
        if (! $initiator->canAccessTenant($tenant)) {
            throw new NotFoundHttpException;
        }

        Gate::forUser($initiator)->authorize(Capabilities::PROVIDER_RUN, $tenant);

        $resolution = $this->connections->resolveDefault($tenant, 'microsoft');

        if ($resolution->resolved && $resolution->connection instanceof ProviderConnection) {
            return $this->providerConnectionCheckUsingConnection(
                tenant: $tenant,
                connection: $resolution->connection,
                initiator: $initiator,
                extraContext: $extraContext,
            );
        }

        return $this->providers->start(
            tenant: $tenant,
            connection: null,
            operationType: 'provider.connection.check',
            dispatcher: fn (OperationRun $run): mixed => $this->dispatchConnectionHealthCheck($run, $tenant, $initiator),
            initiator: $initiator,
            extraContext: array_merge($extraContext, [
                'execution_authority_mode' => ExecutionAuthorityMode::ActorBound->value,
                'required_capability' => Capabilities::PROVIDER_RUN,
            ]),
        );
    }

    /**
     * Start (or dedupe) a provider-connection verification run for an explicit connection.
     *
     * @param  array<string, mixed>  $extraContext
     */
    public function providerConnectionCheckUsingConnection(
        Tenant $tenant,
        ProviderConnection $connection,
        User $initiator,
        array $extraContext = [],
    ): ProviderOperationStartResult {
        if (! $initiator->canAccessTenant($tenant)) {
            throw new NotFoundHttpException;
        }

        Gate::forUser($initiator)->authorize(Capabilities::PROVIDER_RUN, $tenant);

        $identity = $this->identityResolver->resolve($connection);

        $result = $this->providers->start(
            tenant: $tenant,
            connection: $connection,
            operationType: 'provider.connection.check',
            dispatcher: fn (OperationRun $run): mixed => $this->dispatchConnectionHealthCheck($run, $tenant, $initiator),
            initiator: $initiator,
            extraContext: array_merge($extraContext, [
                'execution_authority_mode' => ExecutionAuthorityMode::ActorBound->value,
                'required_capability' => Capabilities::PROVIDER_RUN,
                'identity' => [
                    'connection_type' => $identity->connectionType->value,
                    'credential_source' => $identity->credentialSource,
                    'effective_client_id' => $identity->effectiveClientId,
                ],
            ]),
        );

        if ($result->status === 'started') {
            $projectedState = $this->stateProjector->project(
                connectionType: $connection->connection_type,
                consentStatus: $connection->consent_status,
                verificationStatus: ProviderVerificationStatus::Pending,
                currentStatus: is_string($connection->status) ? $connection->status : null,
            );

            $connection->update([
                'verification_status' => ProviderVerificationStatus::Pending,
                'status' => $projectedState['status'],
                'health_status' => $projectedState['health_status'],
                'last_error_reason_code' => null,
                'last_error_message' => null,
            ]);
        }

        return $result;
    }

    private function dispatchConnectionHealthCheck(OperationRun $run, Tenant $tenant, User $initiator): mixed
    {
        $context = is_array($run->context ?? null) ? $run->context : [];
        $providerConnectionId = $context['provider_connection_id'] ?? null;

        if (! is_numeric($providerConnectionId)) {
            throw new InvalidArgumentException('Provider connection id is missing from run context.');
        }

        return ProviderConnectionHealthCheckJob::dispatch(
            tenantId: (int) $tenant->getKey(),
            userId: (int) $initiator->getKey(),
            providerConnectionId: (int) $providerConnectionId,
            operationRun: $run,
        );
    }
}