<?php

namespace App\Livewire\Operator;

use App\Models\Category;
use App\Models\Subcategory;
use App\Models\User;
use App\Services\BookStackClient;
use App\Services\TicketService;
use App\Support\Settings;
use Illuminate\Support\Facades\Auth;
use Livewire\Attributes\Computed;
use Livewire\Component;
use Livewire\WithFileUploads;

class NewTicket extends Component
{
    use WithFileUploads;

    public int $step = 1;

    public ?int $customerId = null;

    public ?int $categoryId = null;

    public ?int $subcategoryId = null;

    public string $subject = '';

    public string $body = '';

    public array $customValues = [];

    public array $attachments = [];

    // Set via wire:init (see the blade view) rather than on the initial
    // render, so the BookStack HTTP call in suggestedArticles() never
    // delays the page's first paint — it loads in a beat later instead.
    public bool $suggestedArticlesLoaded = false;

    public function loadSuggestedArticles(): void
    {
        $this->suggestedArticlesLoaded = true;
    }

    #[Computed]
    public function clients()
    {
        return User::query()->withRole('client')->orderBy('name')->get();
    }

    #[Computed]
    public function categories()
    {
        return Category::query()->with('subcategories')->get();
    }

    #[Computed]
    public function selectedCategory(): ?Category
    {
        return $this->categoryId ? Category::query()->with('subcategories')->find($this->categoryId) : null;
    }

    #[Computed]
    public function selectedSubcategory(): ?Subcategory
    {
        return $this->subcategoryId ? Subcategory::query()->with('customFields')->find($this->subcategoryId) : null;
    }

    public function selectCategory(int $id): void
    {
        $this->categoryId = $id;
        $this->subcategoryId = null;
        $this->step = 2;
    }

    public function selectSubcategory(int $id): void
    {
        $this->subcategoryId = $id;
        $this->step = 3;
    }

    /**
     * @return array<int, array{name: string, url: ?string}>
     */
    #[Computed]
    public function suggestedArticles(): array
    {
        if (! $this->suggestedArticlesLoaded) {
            return [];
        }

        $query = trim(($this->selectedCategory?->name ?? '').' '.($this->selectedSubcategory?->name ?? ''));

        return app(BookStackClient::class)->search($query);
    }

    public function backToCategory(): void
    {
        $this->step = 1;
    }

    public function backToSubcategory(): void
    {
        $this->step = 2;
    }

    public function updatedAttachments(): void
    {
        if (! $this->attachments) {
            return;
        }

        if ($error = Settings::validateAttachments($this->attachments)) {
            $this->attachments = [];
            $this->addError('attachments', $error);
        }
    }

    public function removeAttachment(int $index): void
    {
        unset($this->attachments[$index]);
        $this->attachments = array_values($this->attachments);
    }

    public function submit(): void
    {
        $rules = [
            'customerId' => 'required|exists:users,id',
            'subject' => 'required|string|max:255',
            'body' => 'required|string',
        ];

        foreach ($this->selectedSubcategory?->customFields ?? [] as $field) {
            $rules["customValues.{$field->id}"] = $field->required ? 'required' : 'nullable';
        }

        $this->validate($rules);

        $customer = User::query()->findOrFail($this->customerId);

        $ticket = app(TicketService::class)->create([
            'email' => $customer->email,
            'subcategory_id' => $this->subcategoryId,
            'subject' => $this->subject,
            'body' => $this->body,
            'custom_values' => $this->customValues,
            'assignee_id' => Auth::id(),
        ], $customer);

        $ticket->messages()->first()?->update([
            'body' => $ticket->body.' (zgłoszenie utworzone przez operatora w imieniu klienta)',
        ]);

        app(TicketService::class)->attachFiles($ticket, $ticket->messages()->first(), $this->attachments);

        $this->redirect(route('operator.ticket', $ticket), navigate: true);
    }

    public function render()
    {
        return view('livewire.operator.new-ticket');
    }
}