<?php

namespace App\Services\Intune;

use Illuminate\Support\Arr;

class EnrollmentAutopilotPolicyNormalizer implements PolicyTypeNormalizer
{
    public function __construct(private readonly DefaultPolicyNormalizer $defaultNormalizer) {}

    public function supports(string $policyType): bool
    {
        return in_array($policyType, [
            'windowsAutopilotDeploymentProfile',
            'windowsEnrollmentStatusPage',
            'enrollmentRestriction',
        ], true);
    }

    /**
     * @return array{status: string, settings: array<int, array<string, mixed>>, settings_table?: array<string, mixed>, warnings: array<int, string>}
     */
    public function normalize(?array $snapshot, string $policyType, ?string $platform = null): array
    {
        $snapshot = is_array($snapshot) ? $snapshot : [];

        $displayName = Arr::get($snapshot, 'displayName') ?? Arr::get($snapshot, 'name');
        $description = Arr::get($snapshot, 'description');

        $warnings = [];

        if ($policyType === 'enrollmentRestriction') {
            $warnings[] = 'Restore is preview-only for Enrollment Restrictions.';
        }

        $generalEntries = [
            ['key' => 'Type', 'value' => $policyType],
        ];

        if (is_string($displayName) && $displayName !== '') {
            $generalEntries[] = ['key' => 'Display name', 'value' => $displayName];
        }

        if (is_string($description) && $description !== '') {
            $generalEntries[] = ['key' => 'Description', 'value' => $description];
        }

        $odataType = Arr::get($snapshot, '@odata.type');
        if (is_string($odataType) && $odataType !== '') {
            $generalEntries[] = ['key' => '@odata.type', 'value' => $odataType];
        }

        $roleScopeTagIds = Arr::get($snapshot, 'roleScopeTagIds');
        if (is_array($roleScopeTagIds) && $roleScopeTagIds !== []) {
            $generalEntries[] = ['key' => 'Scope tag IDs', 'value' => array_values($roleScopeTagIds)];
        }

        $settings = [
            [
                'type' => 'keyValue',
                'title' => 'General',
                'entries' => $generalEntries,
            ],
        ];

        $typeBlock = match ($policyType) {
            'windowsAutopilotDeploymentProfile' => $this->buildAutopilotBlock($snapshot),
            'windowsEnrollmentStatusPage' => $this->buildEnrollmentStatusPageBlock($snapshot),
            'enrollmentRestriction' => $this->buildEnrollmentRestrictionBlock($snapshot),
            default => null,
        };

        if ($typeBlock !== null) {
            $settings[] = $typeBlock;
        }

        $settings = array_values(array_filter($settings));

        return [
            'status' => 'ok',
            'settings' => $settings,
            'warnings' => $warnings,
        ];
    }

    /**
     * @return array{type: string, title: string, entries: array<int, array{key: string, value: mixed}>}|null
     */
    private function buildAutopilotBlock(array $snapshot): ?array
    {
        $entries = [];

        foreach ([
            'deviceNameTemplate' => 'Device name template',
            'language' => 'Language',
            'locale' => 'Locale',
            'deploymentMode' => 'Deployment mode',
            'deviceType' => 'Device type',
            'enableWhiteGlove' => 'Pre-provisioning (White Glove)',
            'hybridAzureADJoinSkipConnectivityCheck' => 'Skip Hybrid AAD connectivity check',
        ] as $key => $label) {
            $value = Arr::get($snapshot, $key);

            if (is_string($value) && $value !== '') {
                $entries[] = ['key' => $label, 'value' => $value];
            } elseif (is_bool($value)) {
                $entries[] = ['key' => $label, 'value' => $value ? 'Enabled' : 'Disabled'];
            }
        }

        $oobe = Arr::get($snapshot, 'outOfBoxExperienceSettings');
        if (is_array($oobe) && $oobe !== []) {
            $entries[] = ['key' => 'Out-of-box experience', 'value' => Arr::except($oobe, ['@odata.type'])];
        }

        $assignments = Arr::get($snapshot, 'assignments');
        if (is_array($assignments) && $assignments !== []) {
            $entries[] = ['key' => 'Assignments (snapshot)', 'value' => '[present]'];
        }

        if ($entries === []) {
            return null;
        }

        return [
            'type' => 'keyValue',
            'title' => 'Autopilot profile',
            'entries' => $entries,
        ];
    }

    /**
     * @return array{type: string, title: string, entries: array<int, array{key: string, value: mixed}>}|null
     */
    private function buildEnrollmentStatusPageBlock(array $snapshot): ?array
    {
        $entries = [];

        foreach ([
            'priority' => 'Priority',
            'showInstallationProgress' => 'Show installation progress',
            'blockDeviceSetupRetryByUser' => 'Block retry by user',
            'allowDeviceResetOnInstallFailure' => 'Allow device reset on install failure',
            'installProgressTimeoutInMinutes' => 'Install progress timeout (minutes)',
            'allowLogCollectionOnInstallFailure' => 'Allow log collection on failure',
        ] as $key => $label) {
            $value = Arr::get($snapshot, $key);

            if (is_int($value) || is_float($value)) {
                $entries[] = ['key' => $label, 'value' => $value];
            } elseif (is_string($value) && $value !== '') {
                $entries[] = ['key' => $label, 'value' => $value];
            } elseif (is_bool($value)) {
                $entries[] = ['key' => $label, 'value' => $value ? 'Enabled' : 'Disabled'];
            }
        }

        $selected = Arr::get($snapshot, 'selectedMobileAppIds');
        if (is_array($selected) && $selected !== []) {
            $entries[] = ['key' => 'Selected mobile app IDs', 'value' => array_values($selected)];
        }

        $assigned = Arr::get($snapshot, 'assignments');
        if (is_array($assigned) && $assigned !== []) {
            $entries[] = ['key' => 'Assignments (snapshot)', 'value' => '[present]'];
        }

        if ($entries === []) {
            return null;
        }

        return [
            'type' => 'keyValue',
            'title' => 'Enrollment Status Page (ESP)',
            'entries' => $entries,
        ];
    }

    /**
     * @return array{type: string, title: string, entries: array<int, array{key: string, value: mixed}>}|null
     */
    private function buildEnrollmentRestrictionBlock(array $snapshot): ?array
    {
        $entries = [];

        foreach ([
            'priority' => 'Priority',
            'version' => 'Version',
            'deviceEnrollmentConfigurationType' => 'Configuration type',
        ] as $key => $label) {
            $value = Arr::get($snapshot, $key);

            if (is_int($value) || is_float($value)) {
                $entries[] = ['key' => $label, 'value' => $value];
            } elseif (is_string($value) && $value !== '') {
                $entries[] = ['key' => $label, 'value' => $value];
            }
        }

        $platforms = Arr::get($snapshot, 'platformRestrictions');
        if (is_array($platforms) && $platforms !== []) {
            $entries[] = ['key' => 'Platform restrictions', 'value' => Arr::except($platforms, ['@odata.type'])];
        }

        $assigned = Arr::get($snapshot, 'assignments');
        if (is_array($assigned) && $assigned !== []) {
            $entries[] = ['key' => 'Assignments (snapshot)', 'value' => '[present]'];
        }

        if ($entries === []) {
            return null;
        }

        return [
            'type' => 'keyValue',
            'title' => 'Enrollment restrictions',
            'entries' => $entries,
        ];
    }

    /**
     * @return array<string, mixed>
     */
    public function flattenForDiff(?array $snapshot, string $policyType, ?string $platform = null): array
    {
        $normalized = $this->normalize($snapshot ?? [], $policyType, $platform);

        return $this->defaultNormalizer->flattenNormalizedForDiff($normalized);
    }
}