<?php

namespace App\Services\PeopleCounting;

use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Http;
use RuntimeException;

/**
 * 拉取海康客流 HTTP 接口（PEOPLE_COUNTING_URL）。
 */
class HikPeopleCountingClient
{
    public function peopleCountingUrl(): string
    {
        $url = trim((string) config('services.people_counting.url', ''));
        if ($url === '') {
            throw new RuntimeException('未配置 PEOPLE_COUNTING_URL（services.people_counting.url）');
        }

        return rtrim($url, '/');
    }

    public function apiBase(): string
    {
        return (string) preg_replace('#/api/people-counting$#i', '', $this->peopleCountingUrl());
    }

    /**
     * 单日快照：过去日期读归档 venues[]，今天读内存。
     *
     * @return array<string, mixed>
     */
    public function fetchDailySnapshot(Carbon $day): array
    {
        $d = $day->toDateString();
        $url = $this->peopleCountingUrl();
        $res = Http::timeout($this->timeout())
            ->acceptJson()
            ->get($url, [
                'date' => $d,
                'end_date' => $d,
            ]);

        if (! $res->successful()) {
            throw new RuntimeException("客流日接口 HTTP {$res->status()} {$url}: ".mb_substr($res->body(), 0, 400));
        }

        $json = $res->json();
        if (! is_array($json) || (int) ($json['code'] ?? 0) !== 200) {
            throw new RuntimeException('客流日接口业务失败: '.mb_substr((string) $res->body(), 0, 500));
        }

        return $json;
    }

    /**
     * 全场馆 24 小时桶。
     *
     * @return array<string, mixed>
     */
    public function fetchHourly(Carbon $day): array
    {
        $url = $this->apiBase().'/api/venues/hourly';
        $res = Http::timeout($this->timeout())
            ->acceptJson()
            ->get($url, [
                'date' => $day->toDateString(),
            ]);

        if (! $res->successful()) {
            throw new RuntimeException("客流小时接口 HTTP {$res->status()} {$url}: ".mb_substr($res->body(), 0, 400));
        }

        $json = $res->json();
        if (! is_array($json) || (int) ($json['code'] ?? 0) !== 200) {
            throw new RuntimeException('客流小时接口业务失败: '.mb_substr((string) $res->body(), 0, 500));
        }

        return $json;
    }

    private function timeout(): int
    {
        $n = (int) config('services.people_counting.timeout', 20);

        return max(5, min($n, 120));
    }
}