<?php

namespace App\Console\Commands;

use App\Models\MsgraphPendingChange;
use App\Services\MicrosoftGraph\UserMembershipTracker;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Log;

class ProcessMembershipChanges extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'msgraph:process-membership-changes {--dry-run : Show what would be processed without making changes}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Process pending membership changes for Microsoft Graph sync';

    /**
     * Execute the console command.
     *
     * @return int
     */
    public function handle()
    {
        $dryRun = $this->option('dry-run');

        $this->info('🔄 Processing Membership Changes for Microsoft Graph');
        if ($dryRun) {
            $this->warn('🧪 DRY RUN MODE - No changes will be made');
        }
        $this->newLine();

        // Get all pending changes
        $pendingChanges = UserMembershipTracker::getAllPendingChanges();

        if ($pendingChanges->isEmpty()) {
            $this->info('✅ No pending membership changes to process');
            return 0;
        }

        $this->info("📋 Found {$pendingChanges->count()} pending changes to process");
        $this->newLine();        // Group changes by priority
        $changesByPriority = $pendingChanges->groupBy('priority');

        $processed = 0;
        $failed = 0;

        // Process high priority first, then normal, then low
        foreach (['high', 'normal', 'low'] as $priority) {
            if (!isset($changesByPriority[$priority])) {
                continue;
            }

            $changes = $changesByPriority[$priority];
            $this->info("🔥 Processing {$changes->count()} {$priority} priority changes:");

            foreach ($changes as $change) {
                $this->processChange($change, $dryRun) ? $processed++ : $failed++;
            }

            $this->newLine();
        }

        // Summary
        $this->info('📊 Processing Summary:');
        $this->line("  - Total changes: {$pendingChanges->count()}");
        $this->line("  - Processed: {$processed}");
        $this->line("  - Failed: {$failed}");

        if ($failed > 0) {
            $this->warn("⚠️  {$failed} changes failed to process - check logs for details");
        }

        $this->newLine();
        $this->info('✅ Membership changes processing completed');

        return $failed > 0 ? 1 : 0;
    }

    /**
     * Process a single membership change
     */
    private function processChange(MsgraphPendingChange $change, bool $dryRun): bool
    {
        try {
            $userName = $change->user_name;
            $modelTitle = $change->model_title;
            $action = $change->action;

            $this->line("  📝 {$action}: {$userName} → {$modelTitle}");

            if ($dryRun) {
                $this->line("     [DRY RUN] Would process this change");
                return true;
            }

            // Here you would implement the actual Microsoft Graph API calls
            // For now, we'll just simulate the processing
            $this->processWithMicrosoftGraph($change);

            // Mark as processed
            $change->markAsProcessed();

            $this->line("     ✅ Processed successfully");

            Log::info('Processed membership change', [
                'change_id' => $change->id,
                'action' => $change->action,
                'user_id' => $change->user_id,
                'model_type' => $change->model_type,
                'model_id' => $change->model_id
            ]);

            return true;

        } catch (\Exception $e) {
            $this->line("     ❌ Failed: " . $e->getMessage());

            Log::error('Failed to process membership change', [
                'change_id' => $change->id,
                'error' => $e->getMessage(),
                'action' => $change->action ?? 'unknown',
                'user_id' => $change->user_id ?? 'unknown'
            ]);

            return false;
        }
    }

    /**
     * Process the change with Microsoft Graph API
     * This is where you'd implement the actual API calls
     */
    private function processWithMicrosoftGraph(MsgraphPendingChange $change): void
    {
        // TODO: Implement actual Microsoft Graph API calls based on the action type

        switch ($change->action) {
            case 'user_joined':
                // Call Microsoft Graph API to add user to committee/workgroup
                $this->line("     🔗 Would add user to Microsoft Graph group/folder");
                break;

            case 'user_left':
                // Call Microsoft Graph API to remove user from committee/workgroup
                $this->line("     🔗 Would remove user from Microsoft Graph group/folder");
                break;

            case 'user_type_changed':
                // Call Microsoft Graph API to update user permissions/type
                $this->line("     🔗 Would update user permissions in Microsoft Graph");
                break;

            default:
                throw new \Exception("Unknown action type: {$change->action}");
        }

        // Simulate processing time
        usleep(100000); // 0.1 seconds
    }
}