<?php

namespace App\Filament\Pages;

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

class QuestionManagement extends Page
{
    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-rectangle-stack';

    protected static string|UnitEnum|null $navigationGroup = '题库系统';

    protected static ?string $navigationLabel = '题库管理';

    protected static ?int $navigationSort = 2;

    protected ?string $heading = '题库管理';

    protected string $view = 'filament.pages.question-management';

    public ?string $search = null;

    public ?string $selectedKpCode = null;

    public ?string $selectedDifficulty = null;

    public int $currentPage = 1;

    public int $perPage = 25;

    /**
     * 计算属性：从 API 获取题目列表
     */
    #[Computed]
    public function questions(): array
    {
        $service = app(QuestionServiceApi::class);

        $filters = array_filter([
            'kp_code' => $this->selectedKpCode,
            'difficulty' => $this->selectedDifficulty,
            'search' => $this->search,
        ], fn ($value) => filled($value));

        $response = $service->listQuestions($this->currentPage, $this->perPage, $filters);

        return $response['data'] ?? [];
    }

    /**
     * 计算属性：分页信息
     */
    #[Computed]
    public function meta(): array
    {
        $service = app(QuestionServiceApi::class);

        $filters = array_filter([
            'kp_code' => $this->selectedKpCode,
            'difficulty' => $this->selectedDifficulty,
            '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,
        ];
    }

    /**
     * 计算属性：统计数据
     */
    #[Computed]
    public function statistics(): array
    {
        $service = app(QuestionServiceApi::class);
        return $service->getStatistics();
    }

    /**
     * 计算属性：知识点选项
     */
    #[Computed]
    public function knowledgePointOptions(): array
    {
        $service = app(QuestionServiceApi::class);
        return $service->getKnowledgePointOptions();
    }

    /**
     * 搜索更新处理
     */
    public function updatedSearch(): void
    {
        $this->currentPage = 1;
    }

    /**
     * 知识点筛选更新处理
     */
    public function updatedSelectedKpCode(): void
    {
        $this->currentPage = 1;
    }

    /**
     * 难度筛选更新处理
     */
    public function updatedSelectedDifficulty(): void
    {
        $this->currentPage = 1;
    }

    /**
     * 每页数量更新处理
     */
    public function updatedPerPage(): void
    {
        $this->currentPage = 1;
    }

    /**
     * 刷新数据
     */
    #[On('refresh-data')]
    public function refreshData(): void
    {
        $this->resetCache();

        Notification::make()
            ->title('数据已刷新')
            ->success()
            ->send();
    }

    /**
     * 重置缓存
     */
    private function resetCache(): void
    {
        // 清除相关缓存
        cache()->forget('question-list-' . md5(json_encode([
            'page' => $this->currentPage,
            'per_page' => $this->perPage,
            'filters' => array_filter([
                'kp_code' => $this->selectedKpCode,
                'difficulty' => $this->selectedDifficulty,
                'search' => $this->search,
            ]),
        ])));

        cache()->forget('question-statistics');
    }

    /**
     * AI 生成题目
     */
    #[On('ai-generate')]
    public function aiGenerate(): void
    {
        // 调用智能题目生成API
        try {
            $response = Http::timeout(60)->post('http://localhost:5015/generate-intelligent-questions', [
                'knowledge_points' => ['KP1001'],
                'max_questions_per_skill' => 5
            ]);

            if ($response->successful()) {
                Notification::make()
                    ->title('AI 生成成功')
                    ->body('因式分解题目生成任务已启动，请稍后查看结果')
                    ->success()
                    ->send();
            } else {
                Notification::make()
                    ->title('AI 生成失败')
                    ->body('请检查API服务状态')
                    ->danger()
                    ->send();
            }
        } catch (\Exception $e) {
            Notification::make()
                ->title('AI 生成异常')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    /**
     * 智能搜索
     */
    #[On('smart-search')]
    public function smartSearch(): void
    {
        Notification::make()
            ->title('智能搜索功能')
            ->body('请使用搜索框输入关键词')
            ->info()
            ->send();
    }

    /**
     * 跳转到指定页
     */
    public function gotoPage(int $page): void
    {
        $this->currentPage = $page;
    }

    /**
     * 上一页
     */
    public function previousPage(): void
    {
        if ($this->currentPage > 1) {
            $this->currentPage--;
        }
    }

    /**
     * 下一页
     */
    public function nextPage(): void
    {
        if ($this->currentPage < ($this->meta['total_pages'] ?? 1)) {
            $this->currentPage++;
        }
    }

    /**
     * 获取页码数组（用于分页器）
     */
    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;
    }

    /**
     * 头部操作按钮
     */
    protected function getHeaderActions(): array
    {
        return [
            Actions\Action::make('ai_generate')
                ->label('AI 生成题目')
                ->icon('heroicon-m-sparkles')
                ->color('success')
                ->action('aiGenerate'),

            Actions\Action::make('smart_search')
                ->label('智能搜索')
                ->icon('heroicon-m-magnifying-glass')
                ->color('info')
                ->action('smartSearch'),

            Actions\Action::make('refresh')
                ->label('刷新')
                ->icon('heroicon-m-arrow-path')
                ->color('warning')
                ->action('refreshData'),
        ];
    }
}