<?php

namespace App\Filament\Pages;

use App\Models\Question;
use App\Services\QuestionTemReviewService;
use BackedEnum;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use Filament\Support\Enums\Width;
use Illuminate\Support\Facades\Schema;
use Livewire\Attributes\Computed;
use UnitEnum;

/**
 * 展示本会话内从待入库页成功写入的题目，便于事后统一微调 difficulty（0.00～0.90）。
 */
class QuestionImportedDifficultyTune extends Page
{
    protected static ?string $title = '入库题目调难度';

    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-adjustments-horizontal';

    protected static ?string $navigationLabel = '入库题目调难度';

    protected static string|UnitEnum|null $navigationGroup = '题库管理';

    protected static ?int $navigationSort = 5;

    protected Width|string|null $maxContentWidth = Width::Full;

    protected string $view = 'filament.pages.question-imported-difficulty-tune';

    public ?int $selectedQuestionId = null;

    public string $difficultyInput = '0.50';

    #[Computed(cache: false)]
    public function tuningQuestionIds(): array
    {
        $raw = session(QuestionTemReviewService::SESSION_TUNING_QUESTION_IDS, []);

        return is_array($raw) ? array_values(array_unique(array_filter(array_map('intval', $raw)))) : [];
    }

    #[Computed(cache: false)]
    public function selectedQuestion(): ?Question
    {
        if (! $this->selectedQuestionId || ! Schema::hasTable('questions')) {
            return null;
        }

        return Question::query()->find($this->selectedQuestionId);
    }

    public function selectQuestion(int $id): void
    {
        if ($id <= 0) {
            return;
        }
        if (! in_array($id, $this->tuningQuestionIds, true)) {
            Notification::make()->title('该题不在当前列表中')->warning()->send();

            return;
        }
        $this->selectedQuestionId = $id;
        $q = Question::query()->find($id);
        if ($q) {
            $d = max(0.0, min(0.9, round((float) ($q->difficulty ?? 0.5), 2)));
            $this->difficultyInput = number_format($d, 2, '.', '');
        }
    }

    public function saveDifficulty(): void
    {
        if (! $this->selectedQuestionId) {
            Notification::make()->title('请先选择题目')->warning()->send();

            return;
        }
        if (! in_array($this->selectedQuestionId, $this->tuningQuestionIds, true)) {
            Notification::make()->title('该题不在当前列表中')->warning()->send();

            return;
        }

        $raw = trim($this->difficultyInput);
        if ($raw === '' || ! is_numeric($raw)) {
            Notification::make()->title('难度格式不正确')->danger()->send();

            return;
        }
        $value = round((float) $raw, 2);
        if ($value < 0.0 || $value > 0.9) {
            Notification::make()->title('难度须在 0.00～0.90 之间')->danger()->send();

            return;
        }

        Question::query()->where('id', $this->selectedQuestionId)->update([
            'difficulty' => $value,
        ]);

        $this->difficultyInput = number_format($value, 2, '.', '');

        Notification::make()
            ->title('已更新 difficulty')
            ->body(sprintf('question_id: %d · difficulty: %s', $this->selectedQuestionId, $this->difficultyInput))
            ->success()
            ->send();

        $this->dispatch('$refresh');
    }

    public function clearTuningList(): void
    {
        session()->forget(QuestionTemReviewService::SESSION_TUNING_QUESTION_IDS);
        $this->selectedQuestionId = null;
        $this->difficultyInput = '0.50';
        Notification::make()->title('已清空列表记录（仅本会话）')->success()->send();
        $this->dispatch('$refresh');
    }

    public function removeFromList(int $questionId): void
    {
        $ids = array_values(array_filter($this->tuningQuestionIds, fn (int $x) => $x !== $questionId));
        session([QuestionTemReviewService::SESSION_TUNING_QUESTION_IDS => $ids]);
        if ($this->selectedQuestionId === $questionId) {
            $this->selectedQuestionId = null;
            $this->difficultyInput = '0.50';
        }
        $this->dispatch('$refresh');
    }
}