<?php

namespace App\Filament\Pages;

use App\Services\QuestionServiceApi;
use BackedEnum;
use Filament\Actions;
use Filament\Actions\Action;
use Filament\Notifications\Notification;
use Filament\Pages\Page;
use UnitEnum;
use Livewire\Attributes\Computed;
use Livewire\Attributes\On;
use Illuminate\Support\Facades\Http;

class PromptManagement extends Page
{
    protected static string|BackedEnum|null $navigationIcon = 'heroicon-o-chat-bubble-left-right';

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

    protected static ?string $navigationLabel = '提示词管理';

    protected static ?int $navigationSort = 12;

    protected ?string $heading = '提示词管理';

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

    public ?string $selectedType = null;

    public ?string $search = null;

    public int $currentPage = 1;

    public int $perPage = 10;

    public array $selectedPrompts = [];

    // 表单状态
    public bool $showPromptModal = false;
    public bool $isEditing = false;
    public ?string $editingName = null;
    public array $form = [
        'template_name' => '',
        'template_type' => 'question_generation',
        'template_content' => '',
        'variables' => '[]',
        'description' => '',
        'tags' => '',
        'is_active' => 'yes',
    ];

    /**
     * 获取提示词列表
     */
    public function getPrompts(): array
    {
        $service = app(QuestionServiceApi::class);

        try {
            // 获取所有提示词
            $prompts = $service->listPrompts();

            // 筛选
            if ($this->selectedType) {
                $prompts = array_filter($prompts, fn($prompt) =>
                    $prompt['template_type'] === $this->selectedType
                );
            }

            if ($this->search) {
                $searchTerm = strtolower($this->search);
                $prompts = array_filter($prompts, fn($prompt) =>
                    str_contains(strtolower($prompt['template_name']), $searchTerm) ||
                    str_contains(strtolower($prompt['description']), $searchTerm)
                );
            }

            // 分页
            $total = count($prompts);
            $offset = ($this->currentPage - 1) * $this->perPage;
            $paginated = array_slice($prompts, $offset, $this->perPage);

            return [
                'data' => $paginated,
                'meta' => [
                    'page' => $this->currentPage,
                    'per_page' => $this->perPage,
                    'total' => $total,
                    'total_pages' => (int) ceil($total / $this->perPage),
                ]
            ];
        } catch (\Exception $e) {
            \Log::error('Failed to fetch prompts: ' . $e->getMessage());
            return ['data' => [], 'meta' => ['total' => 0]];
        }
    }

    /**
     * 获取提示词类型统计
     */
    public function getTypeStats(): array
    {
        $service = app(QuestionServiceApi::class);

        try {
            $prompts = $service->listPrompts();
            $stats = [];

            foreach ($prompts as $prompt) {
                $type = $prompt['template_type'];
                if (!isset($stats[$type])) {
                    $stats[$type] = 0;
                }
                $stats[$type]++;
            }

            return $stats;
        } catch (\Exception $e) {
            \Log::error('Failed to fetch prompt stats: ' . $e->getMessage());
            return [];
        }
    }

    /**
     * 获取所有类型选项
     */
    public function getTypeOptions(): array
    {
        return [
            '题目生成' => '题目生成',
            '掌握度评估' => '掌握度评估',
            '技能熟练度' => '技能熟练度',
            '质量审核' => '质量审核',
        ];
    }

    /**
     * 筛选更新
     */
    public function updatedSelectedType(): void
    {
        $this->currentPage = 1;
    }

    public function updatedSearch(): void
    {
        $this->currentPage = 1;
    }

    public function updatedPerPage(): void
    {
        $this->currentPage = 1;
    }

    /**
     * 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
    {
        $totalPages = $this->prompts['meta']['total_pages'] ?? 1;
        if ($this->currentPage < $totalPages) {
            $this->currentPage++;
        }
    }

    /**
     * 创建新提示词
     */
    #[On('create-prompt')]
    public function createPrompt(): void
    {
        $this->resetPromptForm();
        $this->isEditing = false;
        $this->editingName = null;
        $this->showPromptModal = true;
    }

    /**
     * 编辑提示词
     */
    #[On('edit-prompt')]
    public function editPrompt(array $prompt): void
    {
        $this->form = [
            'template_name' => $prompt['template_name'] ?? '',
            'template_type' => $prompt['template_type'] ?? 'question_generation',
            'template_content' => $this->fetchPromptContent($prompt['template_name'] ?? '') ?? '',
            'variables' => $prompt['variables'] ?? '[]',
            'description' => $prompt['description'] ?? '',
            'tags' => $prompt['tags'] ?? '',
            'is_active' => ($prompt['is_active'] === 'yes' || $prompt['is_active'] === true) ? 'yes' : 'no',
        ];
        $this->isEditing = true;
        $this->editingName = $prompt['template_name'] ?? null;
        $this->showPromptModal = true;
    }

    /**
     * 删除提示词
     */
    #[On('delete-prompt')]
    public function deletePrompt(string $promptName): void
    {
        try {
            $this->request('DELETE', "/prompts/{$promptName}");
            Notification::make()
                ->title('删除成功')
                ->body("提示词 {$promptName} 已删除")
                ->success()
                ->send();
        } catch (\Exception $e) {
            Notification::make()
                ->title('删除失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    /**
     * 启用/禁用提示词
     */
    #[On('toggle-prompt')]
    public function togglePrompt(?string $promptName = null, ?bool $isActive = null): void
    {
        if (!$promptName || $isActive === null) {
            return;
        }

        try {
            $this->request('PUT', "/prompts/{$promptName}", [
                'is_active' => $isActive ? 'no' : 'yes',
            ]);
            Notification::make()
                ->title(($isActive ? '已禁用 ' : '已启用 ') . $promptName)
                ->success()
                ->send();
        } catch (\Exception $e) {
            Notification::make()
                ->title('更新状态失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    /**
     * 复制提示词
     */
    #[On('duplicate-prompt')]
    public function duplicatePrompt(array $prompt): void
    {
        $newName = ($prompt['template_name'] ?? 'template') . '_copy';
        try {
            $this->request('POST', '/prompts', [
                'template_name' => $newName,
                'template_type' => $prompt['template_type'] ?? 'question_generation',
                'template_content' => $this->fetchPromptContent($prompt['template_name'] ?? '') ?? '',
                'variables' => $prompt['variables'] ?? '[]',
                'description' => $prompt['description'] ?? '',
                'tags' => $prompt['tags'] ?? '',
            ]);
            Notification::make()
                ->title('复制成功')
                ->body("已创建副本：{$newName}")
                ->success()
                ->send();
        } catch (\Exception $e) {
            Notification::make()
                ->title('复制失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    /**
     * 刷新数据
     */
    #[On('refresh-prompts')]
    public function refreshPrompts(): void
    {
        Notification::make()
            ->title('数据已刷新')
            ->success()
            ->send();
    }

    /**
     * 头部操作
     */
    protected function getHeaderActions(): array
    {
        return [
            Actions\Action::make('create')
                ->label('新建提示词')
                ->icon('heroicon-m-plus')
                ->color('success')
                ->action('createPrompt'),

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

    public function savePrompt(): void
    {
        $data = $this->validate([
            'form.template_name' => $this->isEditing ? 'nullable|string' : 'required|string',
            'form.template_type' => 'required|string',
            'form.template_content' => 'required|string',
            'form.variables' => 'nullable|string',
            'form.description' => 'nullable|string',
            'form.tags' => 'nullable|string',
            'form.is_active' => 'nullable|string',
        ])['form'];

        try {
            if ($this->isEditing && $this->editingName) {
                $payload = [
                    'template_content' => $data['template_content'],
                    'template_type' => $data['template_type'],
                    'variables' => $data['variables'] ?? '[]',
                    'description' => $data['description'] ?? '',
                    'tags' => $data['tags'] ?? '',
                    'is_active' => $data['is_active'] ?? 'yes',
                ];
                $this->request('PUT', "/prompts/{$this->editingName}", $payload);
            } else {
                $this->request('POST', '/prompts', [
                    'template_name' => $data['template_name'],
                    'template_type' => $data['template_type'],
                    'template_content' => $data['template_content'],
                    'variables' => $data['variables'] ?? '[]',
                    'description' => $data['description'] ?? '',
                    'tags' => $data['tags'] ?? '',
                ]);
            }

            $this->showPromptModal = false;
            $this->refreshPrompts();

            Notification::make()
                ->title('保存成功')
                ->success()
                ->send();
        } catch (\Exception $e) {
            Notification::make()
                ->title('保存失败')
                ->body($e->getMessage())
                ->danger()
                ->send();
        }
    }

    protected function request(string $method, string $path, array $payload = []): mixed
    {
        $baseUrl = rtrim(config('services.question_bank.base_url', env('QUESTION_BANK_API_BASE', 'http://localhost:5015')), '/');
        $url = $baseUrl . $path;

        $response = Http::timeout(10)->send($method, $url, [
            'json' => $payload,
        ]);

        if (!$response->successful()) {
            throw new \Exception("API 请求失败: {$response->status()} - " . ($response->json('detail') ?? $response->body()));
        }

        return $response->json();
    }

    protected function fetchPromptContent(string $templateName): ?string
    {
        if (!$templateName) {
            return null;
        }
        try {
            $baseUrl = rtrim(config('services.question_bank.base_url', env('QUESTION_BANK_API_BASE', 'http://localhost:5015')), '/');
            $resp = Http::timeout(8)->get($baseUrl . "/prompts/{$templateName}");
            if ($resp->successful()) {
                return $resp->json('template_content');
            }
        } catch (\Exception $e) {
            \Log::warning('获取提示词内容失败: ' . $e->getMessage());
        }
        return null;
    }

    protected function resetPromptForm(): void
    {
        $this->form = [
            'template_name' => '',
            'template_type' => 'question_generation',
            'template_content' => '',
            'variables' => '[]',
            'description' => '',
            'tags' => '',
            'is_active' => 'yes',
        ];
    }
}