<?php

namespace App\Filament\Pages;

use App\Models\SystemSetting;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Pages\Page;
use Filament\Notifications\Notification;

class ManageSystemSettings extends Page
{
    protected static ?string $navigationIcon = 'heroicon-o-cog-6-tooth';

    protected static string $view = 'filament.pages.manage-system-settings';

    protected static ?string $navigationLabel = '系统设置';

    protected static ?string $title = '系统设置';

    protected static ?int $navigationSort = 1;

    public ?array $data = [];

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

    public function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\Tabs::make('配置分组')
                    ->tabs([
                        // 嵌入模型配置
                        Forms\Components\Tabs\Tab::make('嵌入模型配置')
                            ->icon('heroicon-o-cpu-chip')
                            ->schema([
                                Forms\Components\Section::make('模型基础配置')
                                    ->description('配置嵌入模型的基本参数')
                                    ->schema([
                                        Forms\Components\TextInput::make('embedding.model_name')
                                            ->label('模型名称')
                                            ->helperText('例如: text-embedding-3-small, text-embedding-ada-002')
                                            ->required()
                                            ->maxLength(255)
                                            ->minLength(3),
                                        
                                        Forms\Components\TextInput::make('embedding.api_key')
                                            ->label('API 密钥')
                                            ->password()
                                            ->revealable()
                                            ->required()
                                            ->helperText('OpenAI API 密钥（敏感信息）')
                                            ->maxLength(255)
                                            ->minLength(20),
                                        
                                        Forms\Components\TextInput::make('embedding.endpoint_url')
                                            ->label('API 端点 URL')
                                            ->url()
                                            ->helperText('嵌入模型的 API 端点地址')
                                            ->required()
                                            ->maxLength(500)
                                            ->prefix('https://'),
                                    ])
                                    ->columns(1),
                                
                                Forms\Components\Section::make('模型参数配置')
                                    ->description('配置嵌入模型的高级参数')
                                    ->schema([
                                        Forms\Components\TextInput::make('embedding.dimensions')
                                            ->label('向量维度')
                                            ->numeric()
                                            ->minValue(1)
                                            ->maxValue(4096)
                                            ->helperText('嵌入向量的维度大小')
                                            ->required(),
                                        
                                        Forms\Components\TextInput::make('embedding.batch_size')
                                            ->label('批量处理大小')
                                            ->numeric()
                                            ->minValue(1)
                                            ->maxValue(1000)
                                            ->helperText('批量处理文档的数量')
                                            ->required(),
                                    ])
                                    ->columns(2),
                            ]),
                        
                        // 分块参数配置
                        Forms\Components\Tabs\Tab::make('分块参数配置')
                            ->icon('heroicon-o-scissors')
                            ->schema([
                                Forms\Components\Section::make('分块基础参数')
                                    ->description('配置文档分块的基本参数')
                                    ->schema([
                                        Forms\Components\TextInput::make('chunking.chunk_size')
                                            ->label('分块大小')
                                            ->numeric()
                                            ->minValue(100)
                                            ->maxValue(10000)
                                            ->helperText('每个文档块的字符数')
                                            ->required()
                                            ->suffix('字符')
                                            ->default(1000),
                                        
                                        Forms\Components\TextInput::make('chunking.chunk_overlap')
                                            ->label('分块重叠大小')
                                            ->numeric()
                                            ->minValue(0)
                                            ->maxValue(1000)
                                            ->helperText('相邻块之间的重叠字符数')
                                            ->required()
                                            ->suffix('字符')
                                            ->default(200),
                                        
                                        Forms\Components\TextInput::make('chunking.min_chunk_size')
                                            ->label('最小分块大小')
                                            ->numeric()
                                            ->minValue(10)
                                            ->maxValue(1000)
                                            ->helperText('允许的最小块大小')
                                            ->required()
                                            ->suffix('字符')
                                            ->default(100),
                                    ])
                                    ->columns(3),
                                
                                Forms\Components\Section::make('分块高级参数')
                                    ->description('配置文档分块的高级参数')
                                    ->schema([
                                        Forms\Components\Textarea::make('chunking.separator')
                                            ->label('分块分隔符')
                                            ->helperText('用于分割文档的分隔符（支持转义字符如 \\n）')
                                            ->rows(2)
                                            ->maxLength(100),
                                    ])
                                    ->columns(1),
                            ]),
                        
                        // 系统全局配置
                        Forms\Components\Tabs\Tab::make('系统全局配置')
                            ->icon('heroicon-o-globe-alt')
                            ->schema([
                                Forms\Components\Section::make('系统基础信息')
                                    ->description('配置系统的基本信息')
                                    ->schema([
                                        Forms\Components\TextInput::make('system.name')
                                            ->label('系统名称')
                                            ->helperText('显示在系统界面上的名称')
                                            ->required()
                                            ->maxLength(255)
                                            ->default('知识库管理系统'),
                                    ])
                                    ->columns(1),
                                
                                Forms\Components\Section::make('系统运行参数')
                                    ->description('配置系统的运行参数')
                                    ->schema([
                                        Forms\Components\TextInput::make('system.timeout')
                                            ->label('请求超时时间')
                                            ->numeric()
                                            ->minValue(10)
                                            ->maxValue(300)
                                            ->helperText('API 请求的超时时间（秒），建议值：60秒')
                                            ->required()
                                            ->suffix('秒')
                                            ->default(60),
                                        
                                        Forms\Components\TextInput::make('system.max_retries')
                                            ->label('最大重试次数')
                                            ->numeric()
                                            ->minValue(0)
                                            ->maxValue(10)
                                            ->helperText('API 请求失败时的最大重试次数，建议值：3次')
                                            ->required()
                                            ->default(3),
                                    ])
                                    ->columns(2),
                                
                                Forms\Components\Section::make('文件上传配置')
                                    ->description('配置文件上传的限制')
                                    ->schema([
                                        Forms\Components\TextInput::make('system.max_upload_size')
                                            ->label('最大上传大小')
                                            ->numeric()
                                            ->minValue(1048576)
                                            ->maxValue(104857600)
                                            ->helperText('最大文件上传大小（字节），1MB = 1048576，10MB = 10485760，100MB = 104857600')
                                            ->required()
                                            ->suffix('字节')
                                            ->default(10485760),
                                        
                                        Forms\Components\TagsInput::make('system.allowed_file_types')
                                            ->label('允许的文件类型')
                                            ->helperText('允许上传的文件扩展名，例如：pdf, docx, txt, md')
                                            ->placeholder('输入文件类型后按回车')
                                            ->required()
                                            ->default(['pdf', 'docx', 'txt', 'md']),
                                    ])
                                    ->columns(1),
                            ]),
                        
                        // 搜索配置
                        Forms\Components\Tabs\Tab::make('搜索配置')
                            ->icon('heroicon-o-magnifying-glass')
                            ->schema([
                                Forms\Components\Section::make('搜索参数')
                                    ->description('配置搜索功能的参数')
                                    ->schema([
                                        Forms\Components\TextInput::make('search.top_k')
                                            ->label('最大结果数')
                                            ->numeric()
                                            ->minValue(1)
                                            ->maxValue(100)
                                            ->helperText('搜索返回的最大结果数量')
                                            ->required()
                                            ->default(10),
                                        
                                        Forms\Components\TextInput::make('search.similarity_threshold')
                                            ->label('相似度阈值')
                                            ->numeric()
                                            ->minValue(0)
                                            ->maxValue(1)
                                            ->step(0.01)
                                            ->helperText('搜索结果的最小相似度（0-1）')
                                            ->required()
                                            ->default(0.7),
                                        
                                        Forms\Components\Toggle::make('search.enable_rerank')
                                            ->label('启用重排序')
                                            ->helperText('是否对搜索结果进行重新排序')
                                            ->inline(false)
                                            ->default(false),
                                    ])
                                    ->columns(3),
                            ]),
                    ])
                    ->columnSpanFull(),
            ])
            ->statePath('data');
    }

    protected function getSettingsData(): array
    {
        $settings = SystemSetting::all();
        $data = [];

        foreach ($settings as $setting) {
            // 从 value JSON 中提取实际值
            $value = $setting->value;
            
            // 获取 value 数组中的第一个值（因为种子数据中每个 value 都是单键值对）
            if (is_array($value) && count($value) > 0) {
                $data[$setting->key] = reset($value);
            }
        }

        return $data;
    }

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

        // 按配置键分组保存
        foreach ($data as $key => $value) {
            // 确定分组
            $group = explode('.', $key)[0];
            
            // 获取配置键的最后一部分作为 value 的键
            $valueKey = explode('.', $key)[1] ?? $key;
            
            // 更新或创建配置
            SystemSetting::updateOrCreate(
                ['key' => $key],
                [
                    'value' => [$valueKey => $value],
                    'group' => $group,
                ]
            );
        }

        Notification::make()
            ->success()
            ->title('保存成功')
            ->body('系统设置已更新')
            ->send();
    }

    public function resetForm(): void
    {
        // 重新加载表单数据
        $this->form->fill($this->getSettingsData());

        Notification::make()
            ->info()
            ->title('已重置')
            ->body('表单已重置为当前保存的设置')
            ->send();
    }
}