<?php

namespace App\Filament\Pages;

use App\Services\QuestionServiceApi;
use BackedEnum;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use UnitEnum;
use Livewire\Attributes\Computed;

class QuestionManagement extends Page
{

    protected static ?string $title = '题库管理';
    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-document-text';
    protected static ?string $navigationLabel = '题库管理';
    protected static string|UnitEnum|null $navigationGroup = '题库系统';
    protected static ?int $navigationSort = 2;
    protected string $view = 'filament.pages.question-management-simple';

    public ?string $search = null;
    public ?string $selectedKpCode = null;
    public ?string $selectedDifficulty = null;
    public ?string $selectedType = null;
    public int $currentPage = 1;
    public int $perPage = 25;


    #[Computed(cache: false)]
    public function questions(): array
    {
        $service = app(QuestionServiceApi::class);
        $filters = array_filter([
            'kp_code' => $this->selectedKpCode,
            'difficulty' => $this->selectedDifficulty,
            'type' => $this->selectedType,
            'search' => $this->search,
        ], fn ($value) => filled($value));

        $response = $service->listQuestions($this->currentPage, $this->perPage, $filters);
        return $response['data'] ?? [];
    }

    #[Computed(cache: false)]
    public function meta(): array
    {
        $service = app(QuestionServiceApi::class);
        $filters = array_filter([
            'kp_code' => $this->selectedKpCode,
            'difficulty' => $this->selectedDifficulty,
            'type' => $this->selectedType,
            'search' => $this->search,
        ], fn ($value) => filled($value));

        $response = $service->listQuestions($this->currentPage, $this->perPage, $filters);
        return $response['meta'] ?? ['page' => 1, 'per_page' => 25, 'total' => 0, 'total_pages' => 0];
    }

    #[Computed(cache: false)]
    public function statistics(): array
    {
        return app(QuestionServiceApi::class)->getStatistics();
    }

    #[Computed(cache: false)]
    public function knowledgePointOptions(): array
    {
        return app(QuestionServiceApi::class)->getKnowledgePointOptions();
    }


    public function deleteQuestion(string $questionCode): void
    {
        try {
            $service = app(QuestionBankService::class);
            $result = $service->deleteQuestion($questionCode);

            if ($result) {
                Notification::make()->title('删除成功')->body("题目 {$questionCode} 已删除")->success()->send();
                $this->dispatch('refresh-page');
            } else {
                Notification::make()->title('删除失败')->body("题目 {$questionCode} 不存在或已被删除")->warning()->send();
            }
        } catch (\Exception $e) {
            Notification::make()->title('删除异常')->body($e->getMessage())->danger()->send();
        }
    }

    public function updatedSearch(): void
    {
        $this->currentPage = 1;
    }

    public function updatedSelectedKpCode(): void
    {
        $this->currentPage = 1;
    }

    public function updatedSelectedDifficulty(): void
    {
        $this->currentPage = 1;
    }

    public function updatedSelectedType(): void
    {
        $this->currentPage = 1;
    }

    public function updatedPerPage(): void
    {
        $this->currentPage = 1;
    }

    public function gotoPage(int $page): void
    {
        $this->currentPage = $page;
    }

    public function previousPage(): void
    {
        if ($this->currentPage > 1) {
            $this->currentPage--;
        }
    }

    public function nextPage(): void
    {
        if ($this->currentPage < ($this->meta['total_pages'] ?? 1)) {
            $this->currentPage++;
        }
    }

    public function getPages(): array
    {
        $totalPages = $this->meta['total_pages'] ?? 1;
        $currentPage = $this->currentPage;
        $pages = [];
        $start = max(1, $currentPage - 2);
        $end = min($totalPages, $currentPage + 2);

        for ($i = $start; $i <= $end; $i++) {
            $pages[] = $i;
        }

        return $pages;
    }
}