<?php

namespace App\Services;

use App\Libraries\NaverApiClient;
use App\Models\Entities\VrfcReqModel;
use App\Models\Entities\V2stdailyModel;
use App\Models\Entities\V2chgstatModel;
use App\Models\Entities\V2chghistoryModel;

class NaverService
{
    protected $naverClient, $VrfcReqModel, $V2stdailyModel, $V2chgstatModel, $V2chghistoryModel;

    public function __construct()
    {
        $this->naverClient = new NaverApiClient();
        $this->VrfcReqModel = model(VrfcReqModel::class);
        $this->V2stdailyModel = model(V2stdailyModel::class);
        $this->V2chgstatModel = model(V2chgstatModel::class);
        $this->V2chghistoryModel = model(V2chghistoryModel::class);
        helper('log'); 
    }

    /**
     * 메인 프로세스: 요청 타입에 따른 분기 처리
     */
    public function processArticle(array $payload)
    {
        $articleNumber = $payload['articleNumber'];
        $requestType = $payload['requestType'] ?? '';

        // 1. 네이버 API 호출
        $response = $this->naverClient->getArticleInfo($articleNumber);
        if (!$response || $response['code'] !== 'success') {
            throw new \Exception("네이버 API 응답 에러: $articleNumber");
        }

        $vrfcParams = $this->mapToDatabaseParams($response['data'], $payload);
        write_custom_log("PROCESS_START | Type: $requestType | Atcl: $articleNumber", 'INFO', 'service');

        switch ($requestType) {
            case 'REG': // 신규 등록
                $vr_sq = $this->insertVrfcReq($articleNumber, $vrfcParams);
                if ($vr_sq) $this->V2stdailyModel->set_v2_st_daily(null, $vrfcParams['cpid'], $vrfcParams['vrfc_type'] . '0103', '1', 'add');
                break;

            case 'MOD': // 수정
                $vr_sq = $this->updateVrfcReq($articleNumber, $vrfcParams);
                if ($vr_sq) $this->V2stdailyModel->set_v2_st_daily(null, $vrfcParams['cpid'], $vrfcParams['vrfc_type'] . '0102', '1', 'add');
                break;

            case 'CNC': // 취소
                $vr_sq = $this->deleteVrfcReq($articleNumber, $vrfcParams);
                if ($vr_sq) $this->V2stdailyModel->set_v2_st_daily(null, $vrfcParams['cpid'], 'A0101', '1', 'add');
                break;

            case 'FIN': // 완료
                $vr_sq = $this->finVrfcReq($articleNumber, $vrfcParams);
                break;

            default:
                throw new \Exception("알 수 없는 requestType: $requestType");
        }

        return ['vr_sq' => $vr_sq, 'articleNumber' => $articleNumber];
    }

    /**
     * [REG] 신규 등록
     */
    private function insertVrfcReq($articleNumber, $params)
    {
        $existing = $this->VrfcReqModel->where('atcl_no', $articleNumber)->first();
        if ($existing) throw new \Exception("중복 등록 시도: $articleNumber");

        $params['stat_cd'] = '10';
        $params['insert_user'] = '0';
        $params['req_type'] = 'C';

        if (!$this->VrfcReqModel->insert($params)) {
            $sql = (string)$this->VrfcReqModel->getLastQuery();
            write_custom_log("INSERT_FAILED | Atcl: $articleNumber | SQL: $sql", 'ERROR', 'failed');
            throw new \Exception("신규 등록 실패");
        }

        $vr_sq = $this->VrfcReqModel->getInsertID();
        $this->recordStatusAndHistory($vr_sq, '10', 'C9', "신규접수 : 10");

        return $vr_sq;
    }

    /**
     * [MOD] 수정 처리
     */
    private function updateVrfcReq($articleNumber, $params)
    {
        $existing = $this->findExisting($articleNumber);
        if (!$existing) return $this->insertVrfcReq($articleNumber, $params);

        $params['stat_cd'] = '30';
        $params['req_type'] = 'U';
        $params['insert_tm'] = db_now();

        return $this->updateProcess($existing, $params, 'MOD', "재접수 상태변경: {$existing['stat_cd']} => 30");
    }

    /**
     * [CNC] 취소 처리
     */
    private function deleteVrfcReq($articleNumber, $params)
    {
        $existing = $this->findExisting($articleNumber);
        $params['stat_cd'] = '19';
        $params['req_type'] = 'D';

        return $this->updateProcess($existing, $params, 'CNC', "취소 처리: {$existing['stat_cd']} => 19");
    }

    /**
     * [FIN] 완료 처리
     */
    private function finVrfcReq($articleNumber, $params)
    {
        $existing = $this->findExisting($articleNumber);
        $params['stat_cd'] = '60';
        $params['req_type'] = 'F';

        return $this->updateProcess($existing, $params, 'FIN', "완료 처리: {$existing['stat_cd']} => 60");
    }

    // --- 내부 공통 유틸리티 함수 ---

    private function findExisting($articleNumber) {
        $existing = $this->VrfcReqModel->where('atcl_no', $articleNumber)->first();
        if (!$existing) throw new \Exception("해당 매물 없음: $articleNumber");
        return $existing;
    }

    /**
     * 공통 업데이트 및 이력 기록 로직 (Lock 최소화)
     */
    private function updateProcess($existing, $params, $type, $memo)
    {
        $vr_sq = $existing['vr_sq'];
        
        if (!$this->VrfcReqModel->update($vr_sq, $params)) {
            $sql = (string)$this->VrfcReqModel->getLastQuery();
            write_custom_log("UPDATE_FAILED | Type: $type | vr_sq: $vr_sq | SQL: $sql", 'ERROR', 'failed');
            throw new \Exception("[$type] 업데이트 실패");
        }

        $this->recordStatusAndHistory($vr_sq, $params['stat_cd'], 'C9', $memo);
        return $vr_sq;
    }

    /**
     * 상태 및 이력 테이블 기록 (독립적 에러 처리)
     */
    private function recordStatusAndHistory($vr_sq, $stat_cd, $chg_type, $memo)
    {
        // 1. 상태(stat) 저장
        try {
            $this->V2chgstatModel->saveChgstat([
                'vr_sq' => $vr_sq, 'stat_cd' => $stat_cd, 'insert_user' => '0', 'insert_tm' => db_now()
            ], 'I');
        } catch (\Exception $e) {
            write_custom_log("STAT_SAVE_ERR | vr_sq: $vr_sq | Msg: " . $e->getMessage(), 'ERROR', 'failed');
        }

        // 2. 이력(history) 저장
        try {
            $this->V2chghistoryModel->v2_savehistory([
                'vr_sq' => $vr_sq, 'stat_cd' => $stat_cd, 'chg_type' => $chg_type,
                'memo' => $memo, 'insert_id' => 'SYSTEM', 'insert_tm' => db_now()
            ]);
        } catch (\Exception $e) {
            write_custom_log("HIST_SAVE_ERR | vr_sq: $vr_sq | Msg: " . $e->getMessage(), 'ERROR', 'failed');
        }
    }

    /**
     * API 데이터를 DB 컬럼에 맞게 변환
     */
    private function mapToDatabaseParams(array $articleInfo, array $payload): array
    {
        $files = $articleInfo['files'] ?? [];
        $certRegister = [];
        $confirm_doc_img_url = [];
        $referenceFileUrl = [];
        $requestDatetime = date('YmdHis', strtotime($payload['requestDatetime'] ?? 'now'));

        foreach ($files as $file) {
            $fileTypeCode = $file['fileTypeCode'];
            if ($fileTypeCode == 'RCDOC') {
                $certRegister[] = $file['fileUrl'];
            } elseif ($fileTypeCode == 'ADDOC') {
                $confirm_doc_img_url[] = $file['fileUrl'];
            } elseif ($fileTypeCode == 'REFER') {
                $referenceFileUrl[] = $file['fileUrl'];
            }
        }

        $vrfc_params = [
            'reqSeq' => '',
            'atcl_no' => $articleInfo['articleNumber'],
            'step' => '',
            'cpid' => $articleInfo['cpId'],
            'cp_atcl_id' => $articleInfo['cpArticleNumber'],
            'trade_type' => $articleInfo['tradeTypeCode'],
            'realtor_nm' => $articleInfo['realtor']['realtorName'],
            'realtor_tel_no' => $articleInfo['realtor']['representativeCellphoneNumber'],
            'seller_tel_no' => $articleInfo['seller']['sellerTelephoneNumber'],
            'vrfc_type' => $articleInfo['verificationTypeCode'],
            'rgbk_confirm' => $articleInfo['isUnregisteredVerificationRequested'] ? 'Y' : 'N',
            'req_type' => '',
            'rdate' => $requestDatetime ?? db_now('Y-m-d H:i:s'),
            'cpTelNo' => $articleInfo['seller']['sellerTelephoneNumber'],
            'stat_cd' => '',
            'try_cnt' => '0',
            'insert_user' => '',
            'insert_tm' => db_now(),
            'memo' => '',
            'contact_fail_cnt' => '0',
            'sync_yn' => 'Y',
            'reg_try_cnt' => '0',
            'tel_fail_cause' => null,
            'rgbk_confirm_owner_nm' => $articleInfo['seller']['ownerName'] ?? null,
            'direct_trad_yn' => $articleInfo['seller']['isDirectTrade'] === true ? 'Y' : 'N',
            'confirm_doc_img_url' => empty($confirm_doc_img_url) ? null : json_encode($confirm_doc_img_url, JSON_UNESCAPED_UNICODE),
            'confirm_doc_owner_check_yn' => '',
            'owner_verifiable' => null,
            'vrfc_cmpl_type' => null,
            'rgbk_doc_img_url' => null,
            'certRegister' => empty($certRegister) ? null : json_encode($certRegister, JSON_UNESCAPED_UNICODE),
            'referenceFileUrl' => empty($referenceFileUrl) ? null : json_encode($referenceFileUrl, JSON_UNESCAPED_UNICODE),
        ];

        return $vrfc_params;
    }
}