<?php

namespace App\Console\Commands\Dealer;

use App\Enums\DealerManagerSubsidyStatus;
use App\Models\Dealer;
use App\Models\DealerManagerSubsidy;
use Illuminate\Console\Command;
use Illuminate\Support\Carbon;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;

class ManagerSubsidySettleCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'dealer:manager-subsidy-settle
                            {--force : 是否强制操作运行}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = '结算上个月的管理者津贴';

    /**
     * Execute the console command.
     *
     * @return int
     */
    public function handle()
    {
        $tz = now();

        $startAt = $tz->copy()->subMonthNoOverflow()->startOfMonth();
        $endAt = $tz->copy()->subMonthNoOverflow()->endOfMonth();

        $head = '【'.$startAt->format('Y/m/d').'-'.$endAt->format('Y/m/d').'】';

        $cacheKey = $this->cacheKey($startAt, $endAt);

        // 如果不是强制执行，则需检查是否已结算过
        if (! $this->option('force') && Cache::has($cacheKey)) {
            return $this->warn("{$head}管理者津贴已结算");
        }

        $this->info("{$head}------------[开始]管理者津贴结算------------");

        if ($this->option('force')) {
            $this->info("{$head}正在删除旧数据...");
            DealerManagerSubsidy::where('start_at', $startAt)->where('end_at', $endAt)->delete();
            $this->info("{$head}数据删除成功");
        }

        $this->info("{$head}数据写入中...");
        $this->settle($startAt, $endAt, 500);
        $this->info("{$head}写入成功, 总耗时: ".$this->formatDuration($tz->diffInMilliseconds(now(), false)));

        $this->info("{$head}------------[结束]管理者津贴结算------------".PHP_EOL);

        Cache::put($cacheKey, 1, $tz->endOfMonth());

        return 0;
    }

    /**
     * 管理津贴结算结算
     *
     * @param \Illuminate\Support\Carbon $startAt
     * @param \Illuminate\Support\Carbon $endAt
     * @param int $count
     * @return void
     */
    protected function settle(Carbon $startAt, Carbon $endAt, int $count = 200): void
    {
        $feeRate = app_settings('dealer.fee_rate');

        $lastId = Cache::get(
            $cacheKey = $this->cacheKey($startAt, $endAt).':last_id'
        );

        do {
            $dealers = Dealer::where('is_manager', 1)
                            ->forPageAfterId($count, $lastId, 'id')
                            ->get();

            $dealersCount = $dealers->count();

            if ($dealersCount == 0) {
                break;
            }

            $tz = now()->toDateTimeString();

            $earnings = [];

            foreach ($dealers as $dealer) {
                [$totalAmount, $remark] = $this->calculateTotalAmount($dealer, $startAt, $endAt);

                // 如果 补贴总金额 > 0，则添加管理者补贴记录
                if (bccomp($totalAmount, '0', 2) === 1) {
                    // 计算手续费
                    $fee = bcmul($totalAmount, bcdiv($feeRate, '100', 10), 2);

                    $earnings[] = [
                        'user_id' => $dealer->user_id,
                        'total_amount' => $totalAmount,
                        'real_amount' => bcsub($totalAmount, $fee, 2),
                        'fee' => $fee,
                        'fee_rate' => $feeRate,
                        'start_at' => $startAt,
                        'end_at' => $endAt,
                        'lvl' => $dealer->lvl,
                        'is_manager' => $dealer->is_manager,
                        'status' => DealerManagerSubsidyStatus::Pending,
                        'remark' => $remark,
                        'created_at' => $tz,
                        'updated_at' => $tz,
                    ];
                }

                $lastId = $dealer->id;
            }

            DealerManagerSubsidy::insert($earnings);

            Cache::put($cacheKey, $lastId, $endAt->addMonthNoOverflow());

            unset($dealers, $earnings);
        } while ($dealersCount == $count);

        Cache::forget($cacheKey);
    }

    /**
     * 计算补贴总金额
     *
     * @param \App\Models\Dealer
     * @param \Illuminate\Support\Carbon $startAt
     * @param \Illuminate\Support\Carbon $endAt
     * @return array
     */
    protected function calculateTotalAmount(Dealer $dealer, Carbon $startAt, Carbon $endAt): array
    {
        $salesLogs = $dealer->managerSalesLogs()
                            ->with(['product'])
                            ->select('product_id', DB::raw('sum(sales_volume) as sales_volume'))
                            ->whereBetween('order_completed_at', [$startAt, $endAt])
                            ->groupBy('product_id')
                            ->get();
        // 补贴总金额
        $totalAmount = 0;
        // 备注信息
        $remark = '';

        foreach ($salesLogs as $salesLog) {
            $amount = bcmul($salesLog->sales_volume, $salesLog->product->manager_subsidy, 2);
            $totalAmount = bcadd($totalAmount, $amount, 2);

            if ($remark !== '') {
                $remark .= "\n";
            }

            $remark .= "【{$salesLog->product->name}】销量: {$salesLog->sales_volume}, 补贴金额: {$amount}";
        }

        return [$totalAmount, $remark];
    }

    /**
     * 生成缓存的 key
     *
     * @param \Illuminate\Support\Carbon $startAt
     * @param \Illuminate\Support\Carbon $endAt
     * @return void
     */
    protected function cacheKey(Carbon $startAt, Carbon $endAt)
    {
        return $startAt->format('Ymd').'_'.$endAt->format('Ymd').'_dealer_manager_subsidy';
    }

    /**
     * 格式化时间
     *
     * @param float $milliseconds
     * @return string
     */
    protected function formatDuration($milliseconds): string
    {
        if ($milliseconds < 0.01) {
            return round($milliseconds * 1000) . 'μs';
        } elseif ($milliseconds >= 1000) {
            return round($milliseconds / 1000, 2) . 's';
        }

        return $milliseconds . 'ms';
    }
}