<?php

declare(strict_types=1);

namespace App\Http\Controllers\Api;

use App\Constants\ErrorCode;
use App\Http\Controllers\Controller;
use App\Services\LlmService;
use App\Traits\ApiResponse;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use Illuminate\Validation\ValidationException;

class LlmController extends Controller
{
    use ApiResponse;

    public function __construct(
        private readonly LlmService $llmService,
    ) {}

    /**
     * 發送 LLM 請求
     */
    public function request(Request $request): JsonResponse
    {
        try {
            $validated = $request->validate([
                'prompt' => 'required|string|max:4000',
                'max_tokens' => 'nullable|integer|min:1|max:4000',
                'temperature' => 'nullable|numeric|min:0|max:2',
                'top_p' => 'nullable|numeric|min:0|max:1',
                'frequency_penalty' => 'nullable|numeric|min:-2|max:2',
                'presence_penalty' => 'nullable|numeric|min:-2|max:2',
            ]);

            $result = $this->llmService->sendRequest(
                $request->client,
                $validated['prompt'],
                array_filter($validated, fn($key) => $key !== 'prompt', ARRAY_FILTER_USE_KEY)
            );

            return $this->success([
                'response' => $result['response'],
            ]);

        } catch (ValidationException $e) {
            return $this->error(
                ErrorCode::VALIDATION_ERROR,
                ErrorCode::getMessage(ErrorCode::VALIDATION_ERROR),
                $e->errors()
            );
        } catch (\InvalidArgumentException $e) {
            return $this->error(
                ErrorCode::INVALID_REQUEST_FORMAT,
                $e->getMessage()
            );
        } catch (\RuntimeException $e) {
            return $this->error(
                ErrorCode::PROVIDER_ERROR,
                $e->getMessage()
            );
        } catch (\Exception $e) {
            Log::error('Error processing LLM request', [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString(),
                'client_id' => $request->client->id,
                'request_data' => $request->except(['prompt']),
            ]);

            return $this->error(
                ErrorCode::SERVER_ERROR,
                ErrorCode::getMessage(ErrorCode::SERVER_ERROR)
            );
        }
    }
}