<?php

declare(strict_types=1);

namespace App\Business;

use Carbon\Carbon;
use Modules\EcommerceFinance\Repositories\ThirdPartyWarehouseStorageMirrorRepository;

/**
 * 三方仓月度仓储费核算引擎。
 *
 * 口径(与「第三方仓储报价」页公式一致;各移动列按数量/绝对值计入):
 *  - 入库管理费 = Σ( 普通商品资料重量kg ÷ 1000 ×
 *        (加工进仓+加工出仓+采购进仓+采购退货+其它退货+销售退货+盘点+调拨入) ) × 入库单价
 *  - 出库费用   = Σ( 销售出仓 + 其它出库 + 调拨出 ) × 出库单价
 *  - 每日仓储费 = Σ_日( 当日库存结余 ÷ 每托件数 × 每托面积 × 面积单价 ÷ 当月天数 )
 *  - 合计 = 入库 + 出库 + 仓储 + 记账 + 盘亏扣款 + 赔偿
 * 系统数据为唯一核算来源,不读取仓库提供/核对/差异列。
 */
class ThirdPartyWarehouseStorageFeeCalculator
{
    /** 入库计费口径涉及的移动列(取绝对数量求和)。 */
    private const INBOUND_COLUMNS = [
        'processing_in', 'processing_out', 'purchase_in', 'purchase_return',
        'other_return', 'sales_return', 'stocktake', 'transfer_in',
    ];

    /** 出库计费口径涉及的移动列(取绝对数量求和)。 */
    private const OUTBOUND_COLUMNS = ['sales_out', 'other_out', 'transfer_out'];

    public function __construct(
        private readonly ThirdPartyWarehouseStorageMirrorRepository $mirror,
        private readonly ThirdPartyWarehouseQuoteRepository $quotes,
        private readonly ThirdPartyWarehouseProductWeightRepository $weights,
    ) {
    }

    /**
     * @return array{summary:array<string,mixed>,daily:list<array<string,mixed>>,per_sku:list<array<string,mixed>>,daily_sku:list<array<string,mixed>>}
     */
    public function calculate(int $warehouseId, string $warehouseName, string $period): array
    {
        abort_unless(
            preg_match('/^\d{4}-(0[1-9]|1[0-2])$/', $period) === 1,
            422,
            '结算月份格式应为 YYYY-MM。',
        );

        $quote = $this->quotes->effectiveFor($warehouseName, $period);
        abort_if($quote === null, 422, '请先在「第三方仓储报价」录入该仓库在 ' . $period . ' 生效的报价。');

        $monthStart = Carbon::createFromFormat('Y-m-d', $period . '-01')->startOfMonth();
        $days = (int) $monthStart->daysInMonth;

        $inboundRate = (float) $quote->inbound_rate_per_ton;
        $outboundRate = (float) $quote->outbound_rate_per_order;
        $piecesPerPallet = (float) $quote->pieces_per_pallet;
        $palletArea = (float) $quote->pallet_area_sqm;
        $sqmRate = (float) $quote->storage_rate_per_sqm_month;

        /** @var array<string,array{closing:float,inbound_qty:float,outbound_qty:float}> $daily */
        $daily = [];
        /** @var array<string,array<string,mixed>> $skus */
        $skus = [];
        $dailySku = [];
        $storagePerPiecePerDay = $days > 0 && $piecesPerPallet > 0
            ? $palletArea * $sqmRate / $piecesPerPallet / $days
            : 0.0;

        foreach ($this->mirror->exportRows(['dimension' => 'month', 'period' => $period], 5000) as $row) {
            $date = trim((string) ($row['date'] ?? ''));
            $code = trim((string) ($row['sku_code'] ?? ''));
            if ($date === '' || $code === '') {
                continue;
            }

            $opening = (float) ($row['opening_qty'] ?? 0);
            $closing = (float) ($row['closing_qty'] ?? 0);

            $inboundQty = 0.0;
            foreach (self::INBOUND_COLUMNS as $column) {
                $inboundQty += abs((float) ($row[$column] ?? 0));
            }
            $outboundQty = 0.0;
            foreach (self::OUTBOUND_COLUMNS as $column) {
                $outboundQty += abs((float) ($row[$column] ?? 0));
            }

            if (! isset($daily[$date])) {
                $daily[$date] = ['closing' => 0.0, 'inbound_qty' => 0.0, 'outbound_qty' => 0.0];
            }
            $daily[$date]['closing'] += $closing;
            $daily[$date]['inbound_qty'] += $inboundQty;
            $daily[$date]['outbound_qty'] += $outboundQty;

            $dailySku[] = [
                'date' => $date,
                'owner' => (string) ($row['owner'] ?? ''),
                'sku_code' => $code,
                'product_name' => (string) ($row['product_name'] ?? ''),
                'supplier' => (string) ($row['supplier'] ?? ''),
                'category' => (string) ($row['category'] ?? ''),
                'unit' => (string) ($row['unit'] ?? ''),
                'opening' => round($opening, 2),
                'net_movement' => round($closing - $opening, 2),
                'closing' => round($closing, 2),
                'storage_fee' => round($closing * $storagePerPiecePerDay, 6),
            ];

            if (! isset($skus[$code])) {
                $skus[$code] = [
                    'owner' => (string) ($row['owner'] ?? ''),
                    'sku_code' => $code,
                    'product_name' => (string) ($row['product_name'] ?? ''),
                    'supplier' => (string) ($row['supplier'] ?? ''),
                    'category' => (string) ($row['category'] ?? ''),
                    'unit' => (string) ($row['unit'] ?? ''),
                    'first_date' => $date,
                    'last_date' => $date,
                    'opening' => $opening,
                    'closing' => $closing,
                    'inbound_qty' => 0.0,
                    'outbound_qty' => 0.0,
                ];
            }
            $sku = &$skus[$code];
            if ($date <= $sku['first_date']) {
                $sku['first_date'] = $date;
                $sku['opening'] = $opening;
            }
            if ($date >= $sku['last_date']) {
                $sku['last_date'] = $date;
                $sku['closing'] = $closing;
            }
            $sku['inbound_qty'] += $inboundQty;
            $sku['outbound_qty'] += $outboundQty;
            unset($sku);
        }

        $weightMap = $this->weights->weightsBySkuCodes(array_keys($skus));

        $inboundTons = 0.0;
        $outboundQtyTotal = 0.0;
        $perSku = [];
        foreach ($skus as $code => $sku) {
            $weight = (float) ($weightMap[$code] ?? 0.0);
            $perTon = $weight / 1000;
            $totalTon = $perTon * $sku['inbound_qty'];
            $inboundTons += $totalTon;
            $outboundQtyTotal += $sku['outbound_qty'];

            $perSku[] = [
                'owner' => $sku['owner'],
                'sku_code' => $code,
                'product_name' => $sku['product_name'],
                'supplier' => $sku['supplier'],
                'category' => $sku['category'],
                'unit' => $sku['unit'],
                'weight' => round($weight, 4),
                'per_ton' => round($perTon, 6),
                'inbound_qty' => round($sku['inbound_qty'], 2),
                'total_ton' => round($totalTon, 4),
                'outbound_qty' => round($sku['outbound_qty'], 2),
                'opening' => round($sku['opening'], 2),
                'closing' => round($sku['closing'], 2),
            ];
        }

        $inboundFee = round($inboundTons * $inboundRate, 2);
        $outboundFee = round($outboundQtyTotal * $outboundRate, 2);

        ksort($daily);
        $dailyRows = [];
        $storageFee = 0.0;
        foreach ($daily as $date => $agg) {
            $dayStorage = $days > 0 && $piecesPerPallet > 0
                ? $agg['closing'] / $piecesPerPallet * $palletArea * $sqmRate / $days
                : 0.0;
            $storageFee += $dayStorage;
            $dailyRows[] = [
                'date' => $date,
                'inbound_qty' => round($agg['inbound_qty'], 2),
                'outbound_qty' => round($agg['outbound_qty'], 2),
                'closing' => round($agg['closing'], 2),
                'storage_fee' => round($dayStorage, 4),
                'outbound_fee' => round($agg['outbound_qty'] * $outboundRate, 2),
                'total' => round($dayStorage + $agg['outbound_qty'] * $outboundRate, 2),
            ];
        }
        $storageFee = round($storageFee, 2);

        $totalFee = round($inboundFee + $outboundFee + $storageFee, 2);

        return [
            'summary' => [
                'period' => $period,
                'warehouse_id' => $warehouseId,
                'warehouse_name' => $warehouseName,
                'quote_id' => (int) $quote->id,
                'days_in_month' => $days,
                'inbound_rate_per_ton' => $inboundRate,
                'outbound_rate_per_order' => $outboundRate,
                'pieces_per_pallet' => $piecesPerPallet,
                'pallet_area_sqm' => $palletArea,
                'storage_rate_per_sqm_month' => $sqmRate,
                'inbound_tons' => round($inboundTons, 4),
                'inbound_fee' => $inboundFee,
                'outbound_qty' => round($outboundQtyTotal, 2),
                'outbound_fee' => $outboundFee,
                'storage_fee' => $storageFee,
                'memo_fee' => 0.0,
                'loss_fee' => 0.0,
                'compensation_fee' => 0.0,
                'total_fee' => $totalFee,
            ],
            'daily' => $dailyRows,
            'per_sku' => $perSku,
            'daily_sku' => $dailySku,
        ];
    }
}