<?php

namespace App\Console\Commands;

use App\Models\HostingNode;
use App\Services\Hosting\NodeMonitoringService;
use Illuminate\Console\Command;

class CheckNodeHealthCommand extends Command
{
    protected $signature = 'hosting:check-node-health
                            {--node= : Check a specific node by ID}
                            {--all : Check all active nodes}';

    protected $description = 'Run health checks on hosting nodes to collect resource metrics';

    public function handle(NodeMonitoringService $monitoringService): int
    {
        $nodeId = $this->option('node');

        if ($nodeId) {
            return $this->checkSingleNode($monitoringService, (int) $nodeId);
        }

        return $this->checkAllNodes($monitoringService);
    }

    private function checkSingleNode(NodeMonitoringService $monitoringService, int $nodeId): int
    {
        $node = HostingNode::find($nodeId);

        if (!$node) {
            $this->error("Node with ID {$nodeId} not found.");
            return self::FAILURE;
        }

        $this->info("Checking node: {$node->name} ({$node->ip_address})...");

        $result = $monitoringService->checkNode($node);

        $this->displayNodeResult($node, $result);

        return self::SUCCESS;
    }

    private function checkAllNodes(NodeMonitoringService $monitoringService): int
    {
        $nodes = HostingNode::whereIn('status', [
            HostingNode::STATUS_ACTIVE,
            HostingNode::STATUS_FULL,
            HostingNode::STATUS_MAINTENANCE,
        ])->get();

        if ($nodes->isEmpty()) {
            $this->warn('No active nodes found to check.');
            return self::SUCCESS;
        }

        $this->info("Checking {$nodes->count()} node(s)...");
        $this->newLine();

        $results = [];
        $bar = $this->output->createProgressBar($nodes->count());
        $bar->start();

        foreach ($nodes as $node) {
            $results[$node->id] = $monitoringService->checkNode($node);
            $bar->advance();
        }

        $bar->finish();
        $this->newLine(2);

        $this->displaySummaryTable($nodes, $results);

        $unhealthy = collect($results)->filter(fn($r) => ($r['health'] ?? '') !== NodeMonitoringService::HEALTH_OK);
        if ($unhealthy->isNotEmpty()) {
            $this->newLine();
            $this->warn("⚠️  {$unhealthy->count()} node(s) require attention.");
        }

        return self::SUCCESS;
    }

    private function displayNodeResult(HostingNode $node, array $result): void
    {
        $health = $result['health'] ?? 'unknown';
        $healthIcon = match ($health) {
            NodeMonitoringService::HEALTH_OK => '✅',
            NodeMonitoringService::HEALTH_WARNING => '⚠️',
            NodeMonitoringService::HEALTH_CRITICAL => '🔴',
            NodeMonitoringService::HEALTH_UNREACHABLE => '❌',
            default => '❓',
        };

        $this->newLine();
        $this->info("{$healthIcon} Health: " . strtoupper($health));
        $this->newLine();

        if (isset($result['error'])) {
            $this->error("Error: {$result['error']}");
            return;
        }

        $this->table(
            ['Metric', 'Value'],
            [
                ['CPU Usage', ($result['cpu']['usage_percent'] ?? 'N/A') . '%'],
                ['RAM Usage', ($result['memory']['usage_percent'] ?? 'N/A') . '%'],
                ['Disk Usage (root)', ($result['disk']['root']['usage_percent'] ?? 'N/A') . '%'],
                ['Load (1m)', $result['load']['load_1'] ?? 'N/A'],
                ['Load per Core', $result['load']['load_per_core'] ?? 'N/A'],
                ['Uptime', $result['uptime']['formatted'] ?? 'N/A'],
                ['Processes', $result['processes']['total'] ?? 'N/A'],
                ['Response Time', ($result['response_time_ms'] ?? 'N/A') . 'ms'],
            ]
        );

        if (!empty($result['services'])) {
            $this->newLine();
            $this->info('Services:');
            foreach ($result['services'] as $service => $running) {
                $icon = $running ? '✅' : '❌';
                $this->line("  {$icon} {$service}");
            }
        }
    }

    private function displaySummaryTable($nodes, array $results): void
    {
        $rows = [];

        foreach ($nodes as $node) {
            $result = $results[$node->id] ?? [];
            $health = $result['health'] ?? 'unknown';

            $healthIcon = match ($health) {
                NodeMonitoringService::HEALTH_OK => '✅',
                NodeMonitoringService::HEALTH_WARNING => '⚠️',
                NodeMonitoringService::HEALTH_CRITICAL => '🔴',
                NodeMonitoringService::HEALTH_UNREACHABLE => '❌',
                default => '❓',
            };

            $rows[] = [
                $node->name,
                $node->ip_address,
                "{$healthIcon} " . strtoupper($health),
                isset($result['cpu']['usage_percent']) ? $result['cpu']['usage_percent'] . '%' : 'N/A',
                isset($result['memory']['usage_percent']) ? $result['memory']['usage_percent'] . '%' : 'N/A',
                isset($result['disk']['root']['usage_percent']) ? $result['disk']['root']['usage_percent'] . '%' : 'N/A',
                $result['load']['load_1'] ?? 'N/A',
                "{$node->current_accounts}/{$node->max_accounts}",
            ];
        }

        $this->table(
            ['Node', 'IP', 'Health', 'CPU', 'RAM', 'Disk', 'Load', 'Accounts'],
            $rows
        );
    }
}