<?php

namespace App\Console\Commands\Dealer;

use App\Enums\DealerLvl;
use App\Enums\DealerOrderSettleState;
use App\Enums\DealerOrderStatus;
use App\Models\Dealer;
use App\Models\DealerManagerSalesLog;
use App\Models\DealerManageSubsidyLog;
use App\Models\DealerOrder;
use App\Models\DealerPurchaseLog;
use App\Models\UserInfo;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Throwable;

class OrderProcessCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'dealer:order-process';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = '处理结算状态是待处理的已付款经销商订单';

    /**
     * Execute the console command.
     *
     * @return int
     */
    public function handle()
    {
        DealerOrder::where(
            'settle_state',
            DealerOrderSettleState::Pending
        )->whereIn('status', [
            DealerOrderStatus::Paid,
            DealerOrderStatus::Shipped,
            DealerOrderStatus::Completed,
        ])->chunkById(200, function ($orders) {
            $orders->load([
                'userInfo.dealer',
                'products.productManageSubsidyRules',
            ]);

            foreach ($orders as $order) {
                try {
                    DB::beginTransaction();

                    $this->handleDealerOrder($order);

                    DB::commit();
                } catch (Throwable $e) {
                    DB::rollBack();

                    report($e);
                }
            }
        });

        return 0;
    }

    /**
     * 处理经销商订单
     *
     * @param \App\Models\DealerOrder $dealerOrder
     * @return void
     */
    protected function handleDealerOrder(DealerOrder $dealerOrder)
    {
        $tz = now();

        // 获取下单经销商的所有上级经销商
        $dealers = $this->getDealers($dealerOrder->userInfo);

        // 当前链上的全部经销商（含下单经销商）
        $chainDealers = [$dealerOrder->userInfo->dealer, ...$dealers];

        // 签约经销商的进货日志
        $this->handlePurchaseLogsOfContractedDealer($dealerOrder, $tz);

        // 管理者的销售业绩
        $this->handleManagerSalesLogs($dealerOrder, $chainDealers, $tz);

        // 一级签约经销商和二级经销商的管理津贴
        $this->handleManageSubsidyLogs($dealerOrder, $chainDealers, $tz);

        // 将订单标记为已处理
        // $dealerOrder->forceFill([
        //     'settle_state' => DealerOrderSettleState::Processed,
        // ])->save();
    }

    /**
     * 生成签约经销商的进货日志
     *
     * @param \App\Models\DealerOrder $dealerOrder
     * @param array $dealers
     * @param string $tz
     * @return void
     */
    protected function handlePurchaseLogsOfContractedDealer(DealerOrder $dealerOrder, string $tz)
    {
        $dealer = $dealerOrder->userInfo->dealer;

        // 采购业绩是否算自己的业绩
        $valid = true;

        if ($dealer->lvl->value < DealerLvl::Contracted->value) {
            // 如果订单金额小于升级签约经销商的金额，则结束
            if ($dealerOrder->total_amount < 26400) {
                return;
            }

            $valid = false;
        }

        $log = new DealerPurchaseLog([
            'user_id' => $dealer->user_id,
            'lvl' => $dealer->lvl,
            'order_id' => $dealerOrder->id,
            'total_amount' => $dealerOrder->total_amount,
            'path' => $valid ? $dealerOrder->userInfo->full_path : $dealerOrder->userInfo->path,
            'remark' => $valid ? null : '升级签约',
        ]);
        $log->setCreatedAt($tz);
        $log->setUpdatedAt($tz);
        $log->save();
    }

    /**
     * 分配一级签约经销商和二级经销商的管理津贴
     *
     * @param \App\Models\DealerOrder $dealerOrder
     * @param array $dealers
     * @param string $tz
     * @return void
     */
    protected function handleManageSubsidyLogs(DealerOrder $dealerOrder, array $dealers, string $tz)
    {
        $logs = [];

        foreach ($dealerOrder->products as $product) {
            if ($product->productManageSubsidyRules->isEmpty()) {
                continue;
            }

            // 管理津贴分配规则
            $rules = $product->productManageSubsidyRules->keyBy('lvl');

            $last = null;
            $ranking = 0;

            foreach ($dealers as $dealer) {
                // 如果当前经销商等级没有对应的管理津贴分配规则，则忽略
                if (is_null($rule = $rules->get($dealer->lvl->value))) {
                    continue;
                }

                // 同等级管理津贴最多给三次
                if ($last === null || $dealer->lvl->value > $last->lvl->value) {
                    $ranking = 1;
                } elseif ($ranking < 3 && $dealer->lvl->value === $last->lvl->value) {
                    $ranking++;
                } else {
                    continue;
                }

                $subsidy = $rule->{"price_{$ranking}st"};

                if (bccomp($subsidy, '0') === 1) {
                    $logs[] = [
                        'user_id' => $dealer->user_id,
                        'order_id' => $product->order_id,
                        'product_id' => $product->product_id,
                        'lvl' => $dealer->lvl,
                        'sales_volume' => $product->qty,
                        'total_amount' => bcmul($product->qty, $subsidy, 2),
                        'created_at' => $tz,
                        'updated_at' => $tz,
                    ];
                }

                $last = $dealer;
            }
        }

        DealerManageSubsidyLog::insert($logs);
    }

    /**
     * 过滤出可能会享受管理津贴的经销商（每个等级最多3人）
     *
     * @param array $dealers
     * @return array
     */
    protected function mapManageSubsidyDealers(array $dealers): array
    {
        $map = [];
        $last = null;
        $ranking = 1;

        foreach ($dealers as $dealer) {
            if ($last === null || $dealer->lvl->value > $last->lvl->value) {
                $last = $dealer;
                $map[] = $last;
                $ranking = 1;
            } elseif ($ranking < 3 && $dealer->lvl->value === $last->lvl->value) {
                $last = $dealer;
                $map[] = $last;
                $ranking++;
            }
        }

        return $map;
    }

    /**
     * 生成管理者的销售业绩
     *
     * @param \App\Models\DealerOrder $dealerOrder
     * @param array $dealers
     * @param string $tz
     * @return void
     */
    protected function handleManagerSalesLogs(DealerOrder $dealerOrder, array $dealers, string $tz): void
    {
        if (is_null($manager = $this->firstManager($dealers))) {
            return;
        }

        $logs = [];

        foreach ($dealerOrder->products as $product) {
            $logs[] = [
                'user_id' => $manager->user_id,
                'lvl' => $manager->lvl,
                'order_id' => $product->order_id,
                'product_id' => $product->product_id,
                'sales_volume' => $product->qty,
                'created_at' => $tz,
                'updated_at' => $tz,
            ];
        }

        DealerManagerSalesLog::insert($logs);
    }

    /**
     * 从给定的经销商中获取第一个管理者
     *
     * @param array $dealers
     * @return \App\Models\Dealer|null
     */
    protected function firstManager(array $dealers): ?Dealer
    {
        foreach ($dealers as $dealer) {
            if ($dealer->is_manager) {
                return $dealer;
            }
        }
    }

    /**
     * 获取给定用户的上级经销商
     *
     * @param \App\Models\UserInfo $userInfo
     * @return array
     */
    protected function getDealers(UserInfo $userInfo): array
    {
        $ancestors = [];

        if (empty($pids = $userInfo->parent_ids)) {
            return $ancestors;
        }

        $ancestors = UserInfo::with(['dealer'])
                        ->whereIn('user_id', $pids)
                        ->latest('depth')
                        ->get(['user_id', 'depth']);

        return $ancestors->map(function ($item) {
            return $item->dealer;
        })->all();
    }
}