<?php

namespace App\Filament\Pages;

use App\Services\QuestionBankService;
use App\Services\KnowledgeGraphService;
use BackedEnum;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use UnitEnum;
use Livewire\Attributes\Computed;
use Illuminate\Support\Facades\Session;
use Illuminate\Support\Facades\Http;

class QuestionGeneration extends Page
{
    protected static ?string $title = '题目生成';
    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-sparkles';
    protected static ?string $navigationLabel = '题目生成';
    protected static string|UnitEnum|null $navigationGroup = '资源';
    protected static ?int $navigationSort = 21;
    protected string $view = 'filament.pages.question-generation';

    public ?string $generateKpCode = null;
    public array $selectedSkills = [];
    public int $questionCount = 100;
    public ?string $generateDifficulty = null;
    public ?string $generateType = null;
    public ?string $promptTemplate = null;

    public bool $isGenerating = false;
    public ?string $currentTaskId = null;
    public int $currentTaskProgress = 0;
    public ?string $currentTaskMessage = null;

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

    #[Computed(cache: false)]
    public function skillsOptions(): array
    {
        if (!$this->generateKpCode) {
            return [];
        }

        $service = app(KnowledgeGraphService::class);
        return $service->getSkillsByKnowledgePoint($this->generateKpCode);
    }

    #[Computed(cache: false)]
    public function questionTypeOptions(): array
    {
        return [
            'CHOICE' => '单选题',
            'MULTIPLE_CHOICE' => '多选题',
            'FILL_IN_THE_BLANK' => '填空题',
            'CALCULATION' => '计算题',
            'WORD_PROBLEM' => '应用题',
            'PROOF' => '证明题',
        ];
    }

    #[Computed(cache: false)]
    public function promptOptions(): array
    {
        $service = app(\App\Services\QuestionServiceApi::class);
        $prompts = $service->listPrompts(type: 'question_generation', active: 'yes');

        // 只展示激活的题目生成模板
        $options = [];
        foreach ($prompts as $prompt) {
            $label = $prompt['template_name'];
            if (!empty($prompt['description'])) {
                $label .= ' - ' . (is_string($prompt['description']) ? $prompt['description'] : json_encode($prompt['description']));
            }
            $options[$prompt['template_name']] = $label;
        }

        // 自动选择第一个激活模板
        if (!$this->promptTemplate && !empty($options)) {
            $this->promptTemplate = array_key_first($options);
        }

        return $options;
    }

    public function updatedGenerateKpCode(): void
    {
        // 选择新知识点时清空技能选择
        $this->selectedSkills = [];
    }

    public function toggleAllSkills(): void
    {
        $skillsOptions = $this->skillsOptions;
        $skillsCount = count($skillsOptions);

        \Log::info('[ToggleAllSkills] Called', [
            'skillsCount' => $skillsCount,
            'selectedSkillsCount' => count($this->selectedSkills),
            'skillsOptions' => array_column($skillsOptions, 'code'),
            'selectedSkills' => $this->selectedSkills
        ]);

        if ($skillsCount === 0) {
            \Log::info('[ToggleAllSkills] No skills available, returning');
            return;
        }

        // 获取所有技能的编码列表
        $allSkillCodes = array_values(array_unique(array_column($skillsOptions, 'code')));

        // 检查当前选中的技能是否等于全部技能
        if (count($this->selectedSkills) === $skillsCount &&
            count(array_intersect($this->selectedSkills, $allSkillCodes)) === $skillsCount) {
            // 如果已全选，则清空
            $this->selectedSkills = [];
            \Log::info('[ToggleAllSkills] Deselecting all skills');
        } else {
            // 否则全选
            $this->selectedSkills = $allSkillCodes;
            \Log::info('[ToggleAllSkills] Selecting all skills', ['newSelection' => $this->selectedSkills]);
        }
    }

    public function executeGenerate()
    {
        if ($this->isGenerating) {
            return;
        }

        if (!$this->generateKpCode) {
            Notification::make()->title('请选择知识点')->danger()->send();
            return;
        }

        $skillsOptions = $this->skillsOptions;
        $skillsCount = count($skillsOptions);

        if ($skillsCount > 0 && empty($this->selectedSkills)) {
            Notification::make()->title('请选择至少一个技能')->danger()->send();
            return;
        }

        $this->isGenerating = true;
        $this->currentTaskId = null;

        try {
            $service = app(QuestionBankService::class);
            $callbackUrl = route('api.questions.callback');

            \Log::info("[QuestionGen] 开始异步生成，callback URL: " . $callbackUrl);

            // 异步请求生成题目
            $params = [
                'kp_code' => $this->generateKpCode,
                'skills' => $this->selectedSkills,
                'count' => $this->questionCount,
                'difficulty' => $this->generateDifficulty,
                'type' => $this->generateType,
                'prompt_template' => $this->promptTemplate ?? null
            ];

            // 添加回调 URL
            $params['callback_url'] = $callbackUrl;

            // 获取 base URL（通过公共方法或配置）
            $baseUrl = config('services.question_bank.base_url', env('QUESTION_BANK_API_BASE', 'http://localhost:5015'));
            $baseUrl = rtrim($baseUrl, '/');
            if (!str_ends_with($baseUrl, '/api')) {
                $baseUrl .= '/api';
            }

            // 直接发送异步请求，不使用队列
            try {
                // 先立即跳转，避免阻塞
                $redirectUrl = "/admin/question-management";
                $this->js("window.location.href = '{$redirectUrl}';");

                // 使用 stream 方式快速发送请求
                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, $baseUrl . '/ai/generate-intelligent-questions');
                curl_setopt($ch, CURLOPT_POST, true);
                curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($params));
                curl_setopt($ch, CURLOPT_HTTPHEADER, [
                    'Content-Type: application/json',
                    'Accept: application/json'
                ]);
                curl_setopt($ch, CURLOPT_TIMEOUT, 1); // 1秒超时，只确保请求发出
                curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
                curl_setopt($ch, CURLOPT_FORBID_REUSE, true);
                curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);

                // 异步执行，不等待响应
                curl_exec($ch);
                $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
                curl_close($ch);

                \Log::info("[QuestionGen] 异步请求已发送", [
                    'http_code' => $httpCode
                ]);

                return; // 立即返回

            } catch (\Exception $e) {
                $this->isGenerating = false;
                \Log::error("[QuestionGen] 发送异步请求失败", [
                    'error' => $e->getMessage()
                ]);

                Notification::make()
                    ->title('❌ 请求发送失败')
                    ->body('请检查网络连接并重试')
                    ->danger()
                    ->send();
            }
        } catch (\Illuminate\Http\Client\ConnectionException $e) {
            $this->isGenerating = false;
            \Log::error("[QuestionGen] 连接异常: " . $e->getMessage());
            Notification::make()
                ->title('连接AI服务失败')
                ->body('请检查AI服务是否正常运行')
                ->danger()
                ->send();
        } catch (\Exception $e) {
            $this->isGenerating = false;
            \Log::error("[QuestionGen] 生成异常: " . $e->getMessage());
            Notification::make()
                ->title('请求异常')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    public function forceCloseStatusBar(string $taskId): void
    {
        \Log::info("[QuestionGen] 强制关闭状态栏: {$taskId}");
        $this->isGenerating = false;
        $this->currentTaskId = null;

        Notification::make()
            ->title('⚠️ 任务超时')
            ->body('生成任务可能已完成，请刷新页面查看')
            ->warning()
            ->persistent()
            ->send();
    }
}