<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class File extends Model
{
    use HasFactory, Selector;

    protected $fillable = [
        'original_name',
        'title',
        'ext',
        'src',
        'size',
        'user_id',
        'type',
        'has_thumb',
        'url',
    ];

    protected $casts = [
        'has_thumb' => 'boolean',
    ];

    protected $appends = [
        'full_src',
    ];

    /**
     * URL کامل تصویر — همان قرارداد قبلی API (src = آدرس قابل نمایش).
     */
    public function getSrcAttribute(): ?string
    {
        return self::publicUrl($this->attributes['src'] ?? null);
    }

    public function getFullSrcAttribute(): ?string
    {
        return $this->src;
    }

    public static function publicUrl(?string $path): ?string
    {
        if ($path === null || trim($path) === '') {
            return null;
        }

        $trimmed = trim($path);

        if (preg_match('/^https?:\/\//i', $trimmed)) {
            return self::rewriteWrongPublicUrl($trimmed) ?? $trimmed;
        }

        $relative = self::normalizeRelativeStoragePath($trimmed);
        $base = self::resolvePublicBaseUrl();
        if ($relative === '') {
            return null;
        }
        if ($base === '') {
            return $relative;
        }

        return $base.'/'.$relative;
    }

    /**
     * مسیر نسبی داخل public/storage — حتی اگر قبلاً URL کامل اشتباه در DB ذخیره شده باشد.
     */
    public static function normalizeRelativeStoragePath(string $path): string
    {
        $path = trim($path);

        if (preg_match('#/storage/(.+)$#i', $path, $matches)) {
            return 'storage/'.ltrim($matches[1], '/');
        }

        $relative = ltrim($path, '/');

        if (! str_starts_with($relative, 'storage/')) {
            $relative = 'storage/'.$relative;
        }

        return $relative;
    }

    /**
     * اصلاح URLهای قدیمی: https://site.ir/storage/... → https://site.ir/server/storage/...
     */
    public static function rewriteWrongPublicUrl(string $url): ?string
    {
        if (! preg_match('#^(https?://[^/]+)/storage/(.+)$#i', $url, $matches)) {
            return null;
        }

        $base = self::resolvePublicBaseUrl();
        if ($base === '') {
            return null;
        }

        if (str_contains($base, '/server') && ! str_contains($matches[1].'/storage/', '/server/storage/')) {
            return $base.'/storage/'.$matches[2];
        }

        return null;
    }

    /**
     * پایهٔ URL فایل‌های storage.
     * در درخواست HTTP، دامنهٔ همان درخواست اولویت دارد (جلوگیری از URL اشتباه وقتی settings دامنهٔ ماژول دیگر است).
     */
    public static function resolvePublicBaseUrl(): string
    {
        $fromRequest = self::baseUrlFromRequest();
        if ($fromRequest !== '') {
            return $fromRequest;
        }

        $fromSettings = self::baseUrlFromSettings();
        if ($fromSettings !== '') {
            return self::ensureAbsoluteUrl($fromSettings);
        }

        $domain = config('app.domain');
        if (is_string($domain) && $domain !== '' && ! str_contains($domain, 'localhost')) {
            return self::ensureAbsoluteUrl(self::ensureServerPublicBase(rtrim($domain, '/')));
        }

        $appUrl = config('app.url');
        if (is_string($appUrl) && $appUrl !== '' && ! str_contains($appUrl, 'localhost')) {
            return self::ensureAbsoluteUrl(self::ensureServerPublicBase(rtrim($appUrl, '/')));
        }

        return '';
    }

    private static function baseUrlFromRequest(): string
    {
        try {
            if (app()->bound('request')) {
                $request = request();
                $host = $request?->getSchemeAndHttpHost();
                if (is_string($host) && $host !== '' && ! str_contains($host, 'localhost')) {
                    return self::ensureAbsoluteUrl(self::ensureServerPublicBase($host));
                }
            }
        } catch (\Throwable) {
        }

        return '';
    }

    private static function ensureAbsoluteUrl(string $base): string
    {
        $base = rtrim(trim($base), '/');
        if ($base === '') {
            return '';
        }

        if (! preg_match('/^https?:\/\//i', $base)) {
            $base = 'https://'.ltrim($base, '/');
        }

        return $base;
    }

    private static function baseUrlFromSettings(): string
    {
        try {
            $rows = Setting::query()
                ->whereIn('key', ['bace_url', 'server_url', 'admin_url', 'app_url'])
                ->where('is_active', 1)
                ->pluck('value', 'key');

            foreach (['server_url', 'bace_url'] as $key) {
                $value = trim((string) ($rows[$key] ?? ''));
                if ($value !== '') {
                    return rtrim($value, '/');
                }
            }

            $adminUrl = trim((string) ($rows['admin_url'] ?? ''));
            if ($adminUrl !== '' && preg_match('#/admin#i', $adminUrl)) {
                return rtrim(preg_replace('#/admin/?$#i', '/server', rtrim($adminUrl, '/')), '/');
            }

            $siteUrl = trim((string) ($rows['app_url'] ?? ''));
            if ($siteUrl !== '') {
                $siteUrl = rtrim($siteUrl, '/');
                if (! preg_match('#/server$#i', $siteUrl)) {
                    $siteUrl .= '/server';
                }

                return $siteUrl;
            }
        } catch (\Throwable) {
        }

        return '';
    }

      private static function ensureServerPublicBase(string $base): string
    {
        if (preg_match('#/(server|api)(/|$)#i', $base)) {
            return rtrim($base, '/');
        }

        return rtrim($base, '/').'/server';
    }
}