<?php

use App\Services\Graph\AssignmentFetcher;
use App\Services\Graph\GraphException;
use App\Services\Graph\GraphLogger;
use App\Services\Graph\MicrosoftGraphClient;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Tests\TestCase;

uses(TestCase::class, RefreshDatabase::class);

beforeEach(function () {
    $this->graphClient = Mockery::mock(MicrosoftGraphClient::class);
    $this->logger = Mockery::mock(GraphLogger::class);
    $this->fetcher = new AssignmentFetcher($this->graphClient, $this->logger);
});

test('primary endpoint success', function () {
    $tenantId = 'tenant-123';
    $policyId = 'policy-456';
    $assignments = [
        ['id' => 'assign-1', 'target' => ['@odata.type' => '#microsoft.graph.groupAssignmentTarget', 'groupId' => 'group-1']],
        ['id' => 'assign-2', 'target' => ['@odata.type' => '#microsoft.graph.groupAssignmentTarget', 'groupId' => 'group-2']],
    ];

    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->with("/deviceManagement/configurationPolicies/{$policyId}/assignments", $tenantId)
        ->andReturn(['value' => $assignments]);

    $this->logger
        ->shouldReceive('logDebug')
        ->once()
        ->with('Fetched assignments via primary endpoint', Mockery::any());

    $result = $this->fetcher->fetch($tenantId, $policyId);

    expect($result)->toBe($assignments);
});

test('fallback on empty response', function () {
    $tenantId = 'tenant-123';
    $policyId = 'policy-456';
    $assignments = [
        ['id' => 'assign-1', 'target' => ['@odata.type' => '#microsoft.graph.groupAssignmentTarget', 'groupId' => 'group-1']],
    ];

    // Primary returns empty
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->with("/deviceManagement/configurationPolicies/{$policyId}/assignments", $tenantId)
        ->andReturn(['value' => []]);

    // Fallback returns assignments
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->with('/deviceManagement/configurationPolicies', $tenantId, [
            '$expand' => 'assignments',
            '$filter' => "id eq '{$policyId}'",
        ])
        ->andReturn(['value' => [['id' => $policyId, 'assignments' => $assignments]]]);

    $this->logger
        ->shouldReceive('logDebug')
        ->twice();

    $result = $this->fetcher->fetch($tenantId, $policyId);

    expect($result)->toBe($assignments);
});

test('fail soft on error', function () {
    $tenantId = 'tenant-123';
    $policyId = 'policy-456';

    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->andThrow(new GraphException('Graph API error', 500, ['request_id' => 'request-id-123']));

    $this->logger
        ->shouldReceive('logWarning')
        ->once()
        ->with('Failed to fetch assignments', Mockery::on(function ($context) use ($tenantId, $policyId) {
            return $context['tenant_id'] === $tenantId
                && $context['policy_id'] === $policyId
                && isset($context['context']['request_id']);
        }));

    $result = $this->fetcher->fetch($tenantId, $policyId);

    expect($result)->toBe([]);
});

test('returns empty array when both endpoints return empty', function () {
    $tenantId = 'tenant-123';
    $policyId = 'policy-456';

    // Primary returns empty
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->with("/deviceManagement/configurationPolicies/{$policyId}/assignments", $tenantId)
        ->andReturn(['value' => []]);

    // Fallback returns empty
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->with('/deviceManagement/configurationPolicies', $tenantId, Mockery::any())
        ->andReturn(['value' => []]);

    $this->logger
        ->shouldReceive('logDebug')
        ->times(2);

    $result = $this->fetcher->fetch($tenantId, $policyId);

    expect($result)->toBe([]);
});

test('fallback handles missing assignments key', function () {
    $tenantId = 'tenant-123';
    $policyId = 'policy-456';

    // Primary returns empty
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->andReturn(['value' => []]);

    // Fallback returns policy without assignments key
    $this->graphClient
        ->shouldReceive('get')
        ->once()
        ->andReturn(['value' => [['id' => $policyId]]]);

    $this->logger
        ->shouldReceive('logDebug')
        ->times(2);

    $result = $this->fetcher->fetch($tenantId, $policyId);

    expect($result)->toBe([]);
});