<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Support\Facades\Storage;

class File extends Model
{
    protected $fillable = [
        'file_category_id',
        'original_name',
        'mime_type',
        'size',
    ];

    protected function casts(): array
    {
        return [
            'size' => 'integer',
        ];
    }

    public function category(): BelongsTo
    {
        return $this->belongsTo(FileCategory::class, 'file_category_id');
    }

    public function uploader(): BelongsTo
    {
        return $this->belongsTo(User::class, 'uploaded_by')->withTrashed();
    }

    public function events(): BelongsToMany
    {
        return $this->belongsToMany(Event::class, 'event_file')->withPivot('created_at');
    }

    public function teams(): BelongsToMany
    {
        return $this->belongsToMany(Team::class, 'team_file')->withPivot('created_at');
    }

    public function getStoragePath(): string
    {
        return 'files/' . $this->stored_name;
    }

    public function isImage(): bool
    {
        return str_starts_with($this->mime_type, 'image/');
    }

    public function isPdf(): bool
    {
        return $this->mime_type === 'application/pdf';
    }

    public function isHtml(): bool
    {
        return $this->mime_type === 'text/html';
    }

    public function humanSize(): string
    {
        $bytes = $this->size;
        if ($bytes >= 1048576) {
            return round($bytes / 1048576, 1) . ' MB';
        }
        return round($bytes / 1024) . ' KB';
    }

    public function iconType(): string
    {
        return match (true) {
            str_contains($this->mime_type, 'pdf') => 'pdf',
            str_contains($this->mime_type, 'wordprocessingml') => 'word',
            str_contains($this->mime_type, 'spreadsheetml') => 'excel',
            $this->isImage() => 'image',
            $this->isHtml() => 'html',
            default => 'file',
        };
    }

    public function extension(): string
    {
        return pathinfo($this->original_name, PATHINFO_EXTENSION);
    }

    public function previewData(): array
    {
        $hasPreview = $this->isImage() || $this->isPdf();

        return [
            'name' => $this->original_name,
            'category' => $this->category->name ?? '',
            'size' => $this->humanSize(),
            'downloadUrl' => route('files.download', $this),
            'previewUrl' => $hasPreview ? route('files.preview', $this) : null,
            'isImage' => $this->isImage(),
            'isPdf' => $this->isPdf(),
            'isHtml' => $this->isHtml(),
            'iconBg' => match ($this->iconType()) {
                'pdf' => 'bg-red-100 text-red-600',
                'word' => 'bg-blue-100 text-blue-600',
                'excel' => 'bg-green-100 text-green-600',
                'image' => 'bg-purple-100 text-purple-600',
                'html' => 'bg-orange-100 text-orange-600',
                default => 'bg-gray-100 text-gray-600',
            },
        ];
    }
}