<?php

namespace App\Http\Controllers;

use App\Models\Airline;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class LogoController extends Controller
{
    const array CONDOR_LOGOS = ['BEACH', 'ISLAND', 'PASSION', 'SEA', 'SUNSHINE'];

    public function getAirlineLogo(?Airline $airline)
    {
        $logoFile = $airline?->logo ?? 'blank.png';
        $cacheLimit = 60 * 60 * 24;

        if ($airline?->internal_name == 'condor') {
            $logoKey = array_rand(self::CONDOR_LOGOS);
            $logoFile = 'DE_' . self::CONDOR_LOGOS[$logoKey] . '.png';
            $cacheLimit = 1;
        }

        $path = 'images/logos/tail/' . $logoFile;
        if (!Storage::disk('local')->exists($path)) {
            $path = 'images/logos/tail/blank.png';
        }

        $fullPath = Storage::disk('local')->path($path);
        $lastModified = filemtime($fullPath);

        return response()->file($fullPath, [
            'Content-Type'  => 'image/png',
            'Cache-Control' => 'public, max-age='.$cacheLimit, // 24 hours
            'Last-Modified' => gmdate('D, d M Y H:i:s', $lastModified) . ' GMT',
            'ETag'          => md5($path . $lastModified),
        ]);
    }

    public function getLogoById($id){
        $airline = Airline::where('id', $id)
            ->first();

        //Blank Airline Logo
        if(!$airline) return $this->getLogoByCode('2H');

        return $this->getAirlineLogo($airline);
    }

    public function getLogoByCode(string $code){

           $column = strlen($code) == 2
                    ? 'IATA_code'
                    : 'ICAO_code';

        $airline = Airline::where($column, strtoupper($code))
            ->whereNotNull('logo')
            ->where('active', true)
            ->latest('id')
            ->first();

        if (!$airline) {
            $airline = Airline::where($column, strtoupper($code))
                ->whereNotNull('logo')
                ->latest('id')
                ->first();
        }

        return $this->getAirlineLogo($airline);
    }


    public static function deduplicateLogo(string $logo, array $correctInternalNames)
    {
        $log = fn(string $message) => print($message . PHP_EOL);

        if (empty($correctInternalNames)) {
            $nulled = Airline::where('logo', $logo)->get(['name', 'internal_name']);
            Airline::where('logo', $logo)->update(['logo' => null]);
            foreach ($nulled as $airline) {
                $log("  Logo nulled: {$airline->name} ({$airline->internal_name})");
            }
            return;
        }

        $existing = Airline::whereIn('internal_name', $correctInternalNames)
            ->pluck('internal_name')
            ->toArray();

        $missing = array_diff($correctInternalNames, $existing);

        if (!empty($missing)) {
            throw new \InvalidArgumentException(
                'The following internal names do not exist in the database: ' . implode(', ', $missing)
            );
        }

        $nulled = Airline::where('logo', $logo)
            ->whereNotIn('internal_name', $correctInternalNames)
            ->get(['name', 'internal_name']);

        Airline::where('logo', $logo)
            ->whereNotIn('internal_name', $correctInternalNames)
            ->update(['logo' => null]);

        foreach ($nulled as $airline) {
            $log("  Logo nulled: {$airline->name} ({$airline->internal_name})");
        }
    }

    public static function nullMissingLogoFiles()
    {
        $log = fn(string $message) => print($message . PHP_EOL);

        $airlines = Airline::whereNotNull('logo')->get(['id', 'name', 'logo']);

        foreach ($airlines as $airline) {
            $path = storage_path('app/private/images/logos/tail/' . $airline->logo);

            if (!file_exists($path)) {
                $airline->update(['logo' => null]);
                $log("  Logo nulled (file missing): {$airline->name} — {$airline->logo}");
            }
        }
    }

    public static function renameLogoFiles()
    {
        $log = fn(string $message) => print($message . PHP_EOL);

        $airlines = Airline::whereNotNull('logo')->get(['id', 'name', 'internal_name', 'logo']);

        foreach ($airlines as $airline) {
            $expectedName = $airline->internal_name . '.png';

            if ($airline->logo === $expectedName) {
                continue;
            }

            $oldPath = storage_path('app/private/images/logos/tail/' . $airline->logo);
            $newPath = storage_path('app/private/images/logos/tail/' . $expectedName);

            if (!file_exists($oldPath)) {
                $log("  Skipping (file missing): {$airline->name} — {$airline->logo}");
                continue;
            }

            rename($oldPath, $newPath);
            $airline->update(['logo' => $expectedName]);
            $log("  Renamed: {$airline->logo} → {$expectedName} ({$airline->name})");
        }
    }
}