<?php

namespace app\common\service;

use app\common\logic\Fingerprint;
use app\common\logic\ModelNaming;
use app\common\logic\SkuCodeBuilder;
use app\common\validate\VehVehicleSkuValidate;
use app\common\traits\crud\CrudServiceTrait;
use app\common\model\VehVehicleSku;
use support\Request;

class VehVehicleSkuService
{

    use CrudServiceTrait;

    /**
     * 指定当前要操作的模型
     */
    protected string $modelClass = VehVehicleSku::class;

    /**
     * 验证器
     */
    protected $validator = VehVehicleSkuValidate::class;

    /**
     * 获取验证器
     */
    public function getValidator()
    {
        return  new $this->validator;
    }


    // 枚举
    private const MAPS = [
        'BODY' => [
            'SEDAN' => '三厢轿车', 'SUV'=>'SUV', 'HB'=>'两厢/掀背', 'MPV'=>'MPV', 'PICKUP'=>'皮卡'
        ],
        'DRIVE' => [
            'FWD'=>'前驱', 'RWD'=>'后驱', 'AWD'=>'四驱(AWD)', '4WD'=>'四驱(4WD)'
        ],
        'MOTOR_LAYOUT' => [
            'FWD'=>'前置单电机', 'RWD'=>'后置单电机', 'AWD'=>'双电机四驱', 'DM-I'=>'DM-i', 'DM-P'=>'DM-p'
        ],
        'FUEL' => [
            'GAS'=>'汽油', 'HEV'=>'油电混动', 'PHEV'=>'插电混动', 'EV'=>'纯电', 'EREV'=>'增程'
        ],
        'TRANS' => [
            'MT'=>'手动', 'AT'=>'自动', 'CVT'=>'无级', 'DCT'=>'双离合', '1SPEED'=>'单速'
        ],
        'RANGE_STD' => [
            'CLTC'=>'CLTC', 'WLTP'=>'WLTP', 'EPA'=>'EPA', 'NEDC'=>'NEDC'
        ],
        'EMISSION' => [
            'CHN6'=>'国六', 'EURO6'=>'欧6', 'EPA'=>'美国EPA'
        ],
    ];

    // *_code取中文
    public function label(string $dict, ?string $code): ?string
    {
        if ($code === null || $code === '') return null;
        $dict = strtoupper($dict);
        $code = strtoupper($code);
        return self::MAPS[$dict][$code] ?? $code;
    }

    // 静态映射把 *_code → 中文
    private function backfill(array $d): array
    {
        $d['body_type']     = $this->label('BODY',         $d['body_type_code']);
        $d['drive_type']    = $this->label('DRIVE',        $d['drive_type_code']);
        $d['motor_layout']  = $this->label('MOTOR_LAYOUT', $d['motor_layout_code']);
        $d['fuel_type']     = $this->label('FUEL',         $d['fuel_type_code']);
        $d['transmission']  = $this->label('TRANS',        $d['transmission_code']);
        $d['range_std']     = $this->label('RANGE_STD',    $d['range_std_code']);
        $d['emission_std']  = $this->label('EMISSION',     $d['emission_std_code']);
        return $d;
    }

    protected function buildQueryConfig(Request $request, string $scene = 'default'): array
    {
        $p = $request->all();
        
        $config = [];
        $config['model'] = $this->modelClass;
        switch ($scene) {
            case 'default':
                $config['where']['is_active'] = 1;
                $config['order']['id'] = 'desc';
                break;
            case 'index':
                $config['where']['is_active'] = 1;
                $config['order']['id'] = 'desc';
                break;
            case 'show':
                $config['where']['id'] = $p['id'];
                $config['where']['is_active'] = 1;
                break;
            case 'store':
                break;
            case 'update':
                $config['where']['id'] = $p['id'];
                break;
            case 'destroy':
                $config['where']['id'] = $p['id'];
                break;
        }
        
        return $config;
    }

    public function beforeServiceStore($data, Request $request)
    {
        $data = $this->backfill($data);
        if (empty($data['model_code'])) {
            $data['model_code'] = ModelNaming::buildModelCode($data);
        }
        if (empty($data['model_name'])) {
            $data['model_name'] = ModelNaming::buildModelName($data);
        }
        $data['sku_code']   = SkuCodeBuilder::build($data);
        $data['corp_id']    = 0;
        $data['created_by'] = $request->user->uid;
        $data['updated_by'] = $request->user->uid;
        // 指纹
        $data['fingerprint'] = Fingerprint::makeFromArray($data);
        return $data;
    }

    protected function afterServiceStore($res)
    {
        
        return $res;
    }


    public function beforeServiceUpdate($data, Request $request)
    {
        $data = $this->backfill($data);
        if (empty($data['model_code'])) {
            $data['model_code'] = ModelNaming::buildModelCode($data);
        }
        if (empty($data['model_name'])) {
            $data['model_name'] = ModelNaming::buildModelName($data);
        }
        // 填充系统字段
        $data['updated_by'] = $request->user->uid;
        // 指纹
        $data['fingerprint'] = Fingerprint::makeFromArray($data);
        return $data;
    }

    protected function afterServiceUpdate($res)
    {
        
        return $res;
    }


    /** SKU 字段名 → dict 名（用于 i18n 取词 & 必填校验） */
    protected static array $SKU_FIELD_TO_DICT = [
        'brand_code'         => 'BRAND',
        'series_code'        => 'SERIES',
        'model_code'         => 'MODEL',
        'trim_code'          => 'TRIM',
        'trim_level_code'    => 'TRIM_LEVEL',
        'edition_code'       => 'EDITION',
        'fuel_type_code'     => 'FUEL',
        'drive_type_code'    => 'DRIVE',
        'transmission_code'  => 'TRANS',
        'motor_layout_code'  => 'MOTOR_LAYOUT',
        'body_type_code'     => 'BODY',
        'range_std_code'     => 'RANGE_STD',
        'emission_std_code'  => 'EMISSION',
        'color_exterior_code'=> 'COLOR',
        'color_interior_code'=> 'COLOR',
    ];

    /** 创建 SKU（含指纹与字典校验） */
    public static function create(array $p, int $userId=0, int $corpId=0): VehicleSku
    {
        // SkuValidator::validateForCreate($p);

        // 必填字典：由映射表控制（一般 BRAND/SERIES/FUEL）
        $requiredDicts = MappingService::requiredDicts();
        foreach (self::$SKU_FIELD_TO_DICT as $field => $dict) {
            if (!MappingService::enabled($dict)) continue;
            $isRequired = in_array($dict, $requiredDicts, true);
            if ($isRequired) {
                DictService::ensureExists($dict, $p[$field] ?? null, $field);
            }
        }

        // 填充系统字段
        $now = time();
        $p['sku_code']   = $p['sku_code']   ?? ('SKU'.date('Ymd').'-'.substr(bin2hex(random_bytes(3)),0,6));
        $p['corp_id']    = $p['corp_id']    ?? $corpId;
        $p['created_by'] = $p['created_by'] ?? $userId;
        $p['updated_by'] = $p['updated_by'] ?? $userId;
        $p['created_at'] = $p['created_at'] ?? $now;
        $p['updated_at'] = $p['updated_at'] ?? $now;

        // 指纹
        $p['fingerprint'] = Fingerprint::make($p /*, $scopeCorp=true/false*/);

        return DB::connection()->transaction(function () use ($p) {
            $sku = new VehicleSku($p);
            $sku->save();
            return $sku;
        });
    }

    /** 更新 SKU（部分字段；指纹随事实变动而刷新） */
    public static function update(int $id, array $p, int $userId=0): VehicleSku
    {
        SkuValidator::validateForUpdate($p);

        $sku = VehicleSku::findOrFail($id);

        // 若传入了必填 dict 的 code，需要确认字典存在
        $requiredDicts = MappingService::requiredDicts();
        foreach (self::$SKU_FIELD_TO_DICT as $field => $dict) {
            if (!array_key_exists($field, $p)) continue;
            if (!MappingService::enabled($dict)) continue;
            $isRequired = in_array($dict, $requiredDicts, true);
            if ($isRequired) {
                DictService::ensureExists($dict, $p[$field], $field);
            } else {
                // 可选的：若传了 code 则也校验存在
                if (($p[$field] ?? null) !== null && $p[$field] !== '') {
                    $exists = \app\model\DictTerm::where('dict',$dict)->where('code',$p[$field])->exists();
                    if (!$exists) throw new \InvalidArgumentException("字典不存在：{$dict}.{$p[$field]}");
                }
            }
        }

        // 刷新系统字段
        $p['updated_by'] = $userId;
        $p['updated_at'] = time();

        // 赋值保存
        $sku->fill($p);

        // 只要影响到指纹的事实字段变动，就重算指纹
        $fingerFields = [
            'brand_code','series_code','model_year','fuel_type_code',
            'drive_type_code','transmission_code','body_type_code',
            'engine_disp_l','engine_turbo','battery_kwh','range_km',
            'range_std_code','emission_std_code',
            'corp_id'
        ];
        foreach ($fingerFields as $f) {
            if (array_key_exists($f, $p)) {
                $sku->fingerprint = Fingerprint::make($sku->toArray());
                break;
            }
        }

        $sku->save();
        return $sku;
    }

    /** 详情（带 i18n label 与标准标题） */
    public static function detail(int $id, string $locale='zh-CN'): array
    {
        $sku = VehicleSku::findOrFail($id);
        $data = $sku->toArray();

        $labelOf = function(string $field) use ($data, $locale) {
            $dict = self::$SKU_FIELD_TO_DICT[$field] ?? null;
            if (!$dict) return null;

            $code = $data[$field] ?? null;
            // 若是品牌/车系，允许以中文兜底
            $fallback = null;
            if ($field === 'brand_code')  $fallback = $data['brand_name']  ?? null;
            if ($field === 'series_code') $fallback = $data['series_name'] ?? null;

            // 版型/等级/特别版允许中文兜底
            if ($field === 'trim_code')        $fallback = $data['trim'] ?? null;
            if ($field === 'trim_level_code')  $fallback = $data['trim_level'] ?? null;
            if ($field === 'edition_code')     $fallback = $data['edition_name'] ?? null;

            // 颜色兜底中文
            if ($field === 'color_exterior_code') $fallback = $data['color_exterior_text'] ?? null;
            if ($field === 'color_interior_code') $fallback = $data['color_interior_text'] ?? null;

            return \app\service\DictService::label($dict, $code, $locale, $fallback);
        };

        $i18n = [
            'brand_label'          => $labelOf('brand_code'),
            'series_label'         => $labelOf('series_code'),
            'model_label'          => \app\service\DictService::label('MODEL', $data['model_code'] ?? null, $locale, $data['model_name'] ?? null),
            'trim_label'           => $labelOf('trim_code'),
            'trim_level_label'     => $labelOf('trim_level_code'),
            'edition_label'        => $labelOf('edition_code'),
            'fuel_label'           => $labelOf('fuel_type_code'),
            'drive_label'          => $labelOf('drive_type_code'),
            'trans_label'          => $labelOf('transmission_code'),
            'motor_layout_label'   => $labelOf('motor_layout_code'),
            'body_label'           => $labelOf('body_type_code'),
            'range_std_label'      => $labelOf('range_std_code'),
            'emission_label'       => $labelOf('emission_std_code'),
            'color_exterior_label' => $labelOf('color_exterior_code'),
            'color_interior_label' => $labelOf('color_interior_code'),
            'listing_title'        => TitleBuilder::build($data, $locale),
        ];

        return ['sku'=>$data, 'i18n'=>$i18n];
    }

    /** 列表查询（支持基础筛选 & i18n 列） */
    public static function list(array $q, string $locale='zh-CN', int $page=1, int $pageSize=20): array
    {
        $builder = VehicleSku::query();

        // 常用筛选
        if (!empty($q['brand_code']))  $builder->where('brand_code', $q['brand_code']);
        if (!empty($q['series_code'])) $builder->where('series_code', $q['series_code']);
        if (!empty($q['fuel_type_code'])) $builder->where('fuel_type_code', $q['fuel_type_code']);
        if (!empty($q['model_year']))  $builder->where('model_year', (int)$q['model_year']);
        if (isset($q['is_active']))    $builder->where('is_active', (int)$q['is_active']);

        $builder->orderByDesc('created_at');

        $total = (clone $builder)->count();
        $rows  = $builder->forPage($page, $pageSize)->get()->toArray();

        // 附加 i18n 字段（轻量）
        foreach ($rows as &$row) {
            $row['brand_label']  = DictService::label('BRAND',  $row['brand_code']  ?? null, $locale, $row['brand_name'] ?? null);
            $row['series_label'] = DictService::label('SERIES', $row['series_code'] ?? null, $locale, $row['series_name'] ?? null);
            $row['fuel_label']   = DictService::label('FUEL',   $row['fuel_type_code'] ?? null, $locale, null);
            $row['listing_title']= TitleBuilder::build($row, $locale);
        }

        return ['total'=>$total, 'list'=>$rows, 'page'=>$page, 'page_size'=>$pageSize];
    }
}