<?php

namespace App\Console\Commands;

use Illuminate\Support\Carbon;
use InvalidArgumentException;

trait PeopleCountingDateRange
{
    /**
     * @return list<Carbon>
     */
    protected function peopleCountingDays(?string $date, ?string $from, ?string $to, Carbon $default): array
    {
        $date = is_string($date) ? trim($date) : '';
        $from = is_string($from) ? trim($from) : '';
        $to = is_string($to) ? trim($to) : '';

        if ($date !== '') {
            return [$this->parsePeopleCountingDay($date)];
        }
        if ($from !== '' || $to !== '') {
            if ($from === '') {
                throw new InvalidArgumentException('指定 --to 时必须同时提供 --from');
            }
            $start = $this->parsePeopleCountingDay($from);
            $end = $to !== '' ? $this->parsePeopleCountingDay($to) : $default->copy()->startOfDay();
            if ($start->gt($end)) {
                throw new InvalidArgumentException('--from 不能晚于 --to');
            }
            $days = [];
            for ($d = $start->copy(); $d->lte($end); $d->addDay()) {
                $days[] = $d->copy();
            }

            return $days;
        }

        return [$default->copy()->startOfDay()];
    }

    protected function parsePeopleCountingDay(string $raw): Carbon
    {
        try {
            $dt = Carbon::createFromFormat('Y-m-d', $raw);
        } catch (\Throwable $e) {
            throw new InvalidArgumentException("日期须为 Y-m-d，收到: {$raw}");
        }
        if ($dt === false || $dt->format('Y-m-d') !== $raw) {
            throw new InvalidArgumentException("日期须为 Y-m-d，收到: {$raw}");
        }

        return $dt->startOfDay();
    }

    protected function peopleCountingSleepMs(): int
    {
        $n = (int) config('services.people_counting.sleep_ms', 200);

        return max(0, min($n, 5000));
    }
}