<?php

namespace App\Models;

use App\Entities\CollectorEntity;
use App\Entities\TrafficEntity;

class CollectorModel extends CommonModel
{
    const TABLE = "collectorinfo";
    const PK = "uid";
    const TITLE = "uid";
    protected $table            = self::TABLE;
    // protected $useAutoIncrement = false;
    protected $primaryKey       = self::PK;
    protected $returnType       = CollectorEntity::class;
    protected $allowedFields = [
        "uid",
        "trafficinfo_uid",
        "in",
        "out",
        "raw_in",
        "raw_out",
        "updated_at"
    ];
    public function __construct()
    {
        parent::__construct();
    }

    public function getLastEntity($uid): CollectorEntity|null
    {
        return $this
            ->where('trafficinfo_uid', $uid)
            ->orderBy('created_at', 'DESC')
            ->first(); // 첫 번째 레코드(=가장 최신)
    }

    /**
     * DESC 기준 95% + 1번째 값을 가져오는 함수
     * 
     * @param string $field        in_kbits 또는 out_kbits
     * @param string $startDate    '2024-10-01'
     * @param string $endDate      '2024-10-30'
     * @return mixed               해당 자리의 수치값
     */
    public function get95PercentileValue_OLD(TrafficEntity $trafficEntity, string $field, string $startDate, string $endDate)
    {
        // 1) 해당 조건의 전체 개수 구하기
        $total =
            $this->where("trafficinfo_uid", $trafficEntity->getPK())
            ->where("created_at >=", $startDate)
            ->where("created_at <=", $endDate)
            ->countAllResults(true); // true해야 queryu reset 함
        // false = 쿼리 빌더 초기화 X
        if ($total === 0) {
            return null;
        }
        // 2) index = floor(total * 0.95) + 1
        $index = floor($total * 0.95) + 1;
        // 3) 95% + 1 번째 값 조회
        $builder = $this->builder();
        $builder->select($field)
            ->where("trafficinfo_uid", $trafficEntity->getPK())
            ->where("created_at >=", $startDate)
            ->where("created_at <=", $endDate)
            ->orderBy($field, "DESC")
            ->limit(1, $index - 1); // LIMIT offset, 1

        // 🔥 실행되기 전에 SQL 확인
        $sql = $builder->getCompiledSelect(false); //반드시 false해야 queryu reset 않함
        log_message('debug', '[95PERCENTILE QUERY] ' . $sql);
        $row = $builder->get()->getFirstRow('array');
        return $row[$field] ?? null;
    }

    public function get95PercentileValue(TrafficEntity $trafficEntity, string $field, string $startDate, string $endDate)
    {
        $sql = "WITH ranked AS (
    SELECT `{$field}`,`created_at`, ROW_NUMBER() OVER (ORDER BY `in` DESC) AS rn,COUNT(*) OVER () AS total
    FROM {$this->table}
    WHERE trafficinfo_uid = ?
      AND created_at BETWEEN ? AND ?
)
SELECT `{$field}`
FROM ranked
WHERE rn = FLOOR(total * 0.05) + 1
LIMIT 1";
        return $this->query($sql, [$trafficEntity->getPK(), $startDate, $endDate])->getRowArray()[$field];
    }
}