<?php

namespace App\Http\Controllers;

use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

class SqlGeneratorController extends Controller
{
    /**
     * 查询 agentslave.case_extras 中已存在的 OB 外部 ID 记录。
     */
    public function checkObExternalId(Request $request): JsonResponse
    {
        try {
            $request->validate([
                'case_codes' => 'required|array|min:1',
                'case_codes.*' => 'required|string|max:255',
            ]);

            $caseCodes = array_values(array_unique(array_filter(array_map('trim', $request->input('case_codes')))));

            if (empty($caseCodes)) {
                return response()->json([
                    'success' => false,
                    'message' => '请提供有效的 case_id 列表'
                ], 400);
            }

            $existingCaseCodes = [];
            foreach (array_chunk($caseCodes, 1000) as $chunk) {
                $results = DB::connection('agentslave')
                    ->table('case_extras')
                    ->where('source', 'ob')
                    ->where('field', 'OB Case ID')
                    ->whereIn('case_code', $chunk)
                    ->pluck('case_code')
                    ->all();

                $existingCaseCodes = array_merge($existingCaseCodes, $results);
            }

            $existingCaseCodes = array_values(array_unique(array_map('strval', $existingCaseCodes)));

            return response()->json([
                'success' => true,
                'data' => [
                    'existing_case_codes' => $existingCaseCodes,
                ],
            ]);
        } catch (ValidationException $e) {
            return response()->json([
                'success' => false,
                'message' => '请求参数验证失败',
                'errors' => $e->errors(),
            ], 422);
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => '查询 case_extras 失败: ' . $e->getMessage(),
            ], 500);
        }
    }
}