<?php

namespace App\Services;

use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;
use App\Models\{Device,MonitorMode,WarningNotice,SoilReport,MeteorologicalReport,WaterQualityReport};

class DeviceWarningService
{
    public function judgeLog(Device $device, Model $log, Carbon $reportedAt){
        //设备预警
        $slug = 'mode_warning_';
        switch ($log::class) {
            case SoilReport::class://土壤监测
                $slug .= Device::TYPE_SOIL;
                break;
            case MeteorologicalReport::class://气象监测
                $slug .= Device::TYPE_METEOROLOGICAL;
                break;
            case WaterQualityReport::class://水质监测
                $slug .= Device::TYPE_SOIL;
                break;
        }

        $rule = settings()->get($slug);
        
        if($rule){
            foreach($rule as $lv => $rule){
                $res = $this->verifyRule($rule, $log);
                if($res && $res['status']){
                    $this->inLog($device, $reportedAt, $log, $lv, $res['keys']);
                }
            }
        }
        return ;
    }

    private function verifyRule($rule, $log){
        $res = [
            'status' => false,
            'keys' => []
        ];
        if(isset($rule['conjunction'])){//多条件
            switch($rule['conjunction']){
                case 'or':
                    if(isset($rule['children'])){

                        foreach($rule['children'] as $child){
                            $cRes = $this->verifyRule($child, $log);
                            if($cRes && $cRes['status']){
                                if($log->wasChanged($cRes['keys'])){
                                    $res['status'] = true;
                                    $res['keys'] = array_merge($res['keys'], $cRes['keys']);
                                }elseif(WarningNotice::where([
                                    'loggable_type' => $log::class,
                                    'loggable_id' => $log->id,
                                ])->count() == 0){
                                    $res['status'] = true;
                                    $res['keys'] = array_merge($res['keys'], $cRes['keys']);
                                }
                            }
                        }
                    }
                    break;
                case 'and':
                    if(isset($rule['children'])){
                        $_keys = [];
                        foreach($rule['children'] as $child){
                            $cRes = $this->verifyRule($child, $log);
                            if($cRes && $cRes['status']){
                                $_keys = array_merge($_keys, $cRes['keys']);
                                continue;
                            }else{
                                break;
                            }
                        }
                        if($log->wasChanged($_keys)){
                            $res['status'] = true;
                            $res['keys'][] = implode(',', $_keys);
                        }elseif(WarningNotice::where([
                            'loggable_type' => $log::class,
                            'loggable_id' => $log->id,
                        ])->count() == 0){
                            $res['status'] = true;
                            $res['keys'][] = implode(',', $_keys);
                        }
                    }
                    break;
            }
        }else{//单条件
            $key = $rule['left']['field'] ?? '';
            $value = $log->$key ?? null;
            $min = $rule['right']['0'] ?? null;
            $max = $rule['right']['1'] ?? null;
            if($min !== null && $max === null){//设置了最小值，未设置最大值
                if($value >= $min ){
                    $res['status'] = true;
                    $res['keys'][] = $key;
                }
            }elseif($min === null && $max !== null){//设置最大值，未设置最小值
                if($value <= $max ){
                    $res['status'] = true;
                    $res['keys'][] = $key;
                }
            }elseif($min !== null && $max !== null){//最大值，最小值都有设置
                if($value >= $min && $value <= $max){
                    $res['status'] = true;
                    $res['keys'][] = $key;
                }
            }
        }
        return $res;
    }


    private function inLog(Device $device, Carbon $reportedAt, Model $log, $lv, $columns){
        
        if(!is_array($columns)){
            $columns = array($columns);
        }
        switch($device->type){
            case Device::TYPE_METEOROLOGICAL:
                $fieldNameMap = MonitorMode::fieldMap(Device::TYPE_METEOROLOGICAL);
                $fieldUnitMap = MonitorMode::fieldUnitMap(Device::TYPE_METEOROLOGICAL);
                break;
            case Device::TYPE_SOIL:
                $fieldNameMap = MonitorMode::fieldMap(Device::TYPE_SOIL);
                $fieldUnitMap = MonitorMode::fieldUnitMap(Device::TYPE_SOIL);
                break;
        }

        $notices = array();
        foreach($columns as $column){
            $msg = '';
            if(strpos($column, ',')){//看是否是并联条件
                $_columns = explode(',',$column);
                foreach($_columns as $cc){
                    $msg.= $fieldNameMap[$cc].'达到'.$log->$cc.$fieldUnitMap[$cc].'值，且';
                }
            
                $msg = mb_substr($msg, 0, -2);
            }else{
                $msg = $fieldNameMap[$column].'达到'.$log->$column.$fieldUnitMap[$column].'值';
            }

            $notices[] = [
                'device_id' => $device->id,
                'lv' => $lv,
                'content' => '【'.$device->name.'】【'.WarningNotice::lvMap()[$lv].'】'.$msg,
                'reported_at' => $reportedAt,
                'created_at' => now(),
                'updated_at' => now(),
                'loggable_type' => $log::class,
                'loggable_id' => $log->id,
            ];
        }
        count($notices) > 0 && WarningNotice::insert($notices);
        
    }
}