<?php

namespace App\Filament\Pages;

use App\Models\SiteSetting;
use Filament\Forms\Components\FileUpload;
use Filament\Forms\Components\Section;
use Filament\Forms\Components\Textarea;
use Filament\Forms\Components\TextInput;
use Filament\Forms\Components\Toggle;
use Filament\Forms\Concerns\InteractsWithForms;
use Filament\Forms\Contracts\HasForms;
use Filament\Forms\Form;
use Filament\Notifications\Notification;
use Filament\Pages\Page;

class SiteSettings extends Page implements HasForms
{
    use InteractsWithForms;

    protected static ?string $navigationIcon = 'heroicon-o-cog-6-tooth';
    protected static ?string $navigationLabel = '站点配置';
    protected static ?string $navigationGroup = '站点设置';
    protected static string $view = 'filament.pages.site-settings';

    public ?array $data = [];

    public function mount(): void
    {
        $this->form->fill($this->getSettings());
    }

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Section::make('站点信息')
                    ->schema([
                        TextInput::make('site_title')->label('站点标题')->required(),
                        TextInput::make('site_description')->label('站点描述'),
                        FileUpload::make('site_logo')
                            ->label('站点 Logo')
                            ->disk('public')
                            ->directory('site')
                            ->image()
                            ->imagePreviewHeight('80')
                            ->nullable(),
                        Textarea::make('site_footer')
                            ->label('页脚文案')
                            ->rows(2),
                    ])->columns(2),
                Section::make('首页配置')
                    ->schema([
                        TextInput::make('home_featured_limit')->label('热门推荐数量')->numeric()->required(),
                        TextInput::make('home_new_limit')->label('新增产品数量')->numeric()->required(),
                        TextInput::make('home_category_limit')->label('分类展示数量')->numeric()->required(),
                    ])->columns(3),
                Section::make('列表配置')
                    ->schema([
                        TextInput::make('list_page_size')->label('产品列表分页数')->numeric()->required(),
                        TextInput::make('list_more_threshold')->label('更多阈值')->numeric()->required(),
                        TextInput::make('article_page_size')->label('文章列表分页数')->numeric()->required(),
                    ])->columns(3),
                Section::make('评论与推广')
                    ->schema([
                        Toggle::make('comments_enabled')->label('启用评论'),
                        Toggle::make('show_sponsor_label')->label('显示推广标识'),
                    ])->columns(2),
                Section::make('热度权重')
                    ->schema([
                        TextInput::make('hot_weight_view')->label('浏览权重')->numeric()->required(),
                        TextInput::make('hot_weight_click')->label('点击权重')->numeric()->required(),
                    ])->columns(2),
                Section::make('SEO 与统计')
                    ->schema([
                        TextInput::make('ga_id')->label('GA4 测量 ID')->nullable(),
                        TextInput::make('icp_number')->label('备案号')->nullable(),
                        Textarea::make('social_links')
                            ->label('社交链接（每行：名称|URL）')
                            ->rows(3)
                            ->nullable(),
                        Textarea::make('about_content')
                            ->label('关于页内容（Markdown）')
                            ->rows(4)
                            ->nullable(),
                    ])->columns(2),
            ])
            ->statePath('data');
    }

    public function save(): void
    {
        $data = $this->form->getState();

        foreach ($data as $key => $value) {
            $value = $this->normalizeValue($value);
            SiteSetting::updateOrCreate(['key' => $key], ['value' => $value]);
        }

        Notification::make()
            ->title('保存成功')
            ->success()
            ->send();
    }

    private function getSettings(): array
    {
        $defaults = [
            'site_title' => 'AI 工具导航',
            'site_description' => '精选 AI 工具与产品导航',
            'site_logo' => null,
            'site_footer' => '',
            'home_featured_limit' => '8',
            'home_new_limit' => '8',
            'home_category_limit' => '20',
            'list_page_size' => '20',
            'list_more_threshold' => '20',
            'article_page_size' => '10',
            'comments_enabled' => '1',
            'show_sponsor_label' => '1',
            'hot_weight_view' => '1',
            'hot_weight_click' => '3',
            'ga_id' => '',
            'icp_number' => '',
            'social_links' => '',
            'about_content' => SiteSetting::value('about_content', ''),
        ];

        $data = [];
        foreach ($defaults as $key => $default) {
            $data[$key] = SiteSetting::value($key, $default);
        }

        $data['comments_enabled'] = $data['comments_enabled'] === '1';
        $data['show_sponsor_label'] = $data['show_sponsor_label'] === '1';

        return $data;
    }

    private function normalizeValue($value): ?string
    {
        if (is_bool($value)) {
            return $value ? '1' : '0';
        }

        if (is_array($value)) {
            return json_encode($value, JSON_UNESCAPED_UNICODE);
        }

        if ($value === null) {
            return null;
        }

        return (string) $value;
    }
}