<?php

namespace App\Http\Controllers\Recon;

use App\Exceptions\RepositoryException;
use App\Http\Requests\Recon\ReconItemUpdateRequest;
use App\Models\ReconciliationItemModel;
use App\Models\ReconciliationModel;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Modules\AnnoRoute\Attribute\PutRoute;
use Modules\AnnoRoute\Attribute\RequestAttribute;
use Modules\Common\Http\Controllers\BaseController;

/**
 * 对账明细操作（D4 修改 / D6 单品级门店备注 / D8 对账状态标记）
 * 权限点前缀 recon.item，authorize: item.update → recon.item.item.update
 */
#[RequestAttribute('/recon/item', 'recon.item')]
class ReconItemController extends BaseController
{
    /**
     * D4 修改订货量/称重/数量/金额/商品名，自动重算本行 diff + 头汇总
     */
    #[PutRoute(route: '/{id}', authorize: 'item.update', where: ['id' => '[0-9]+'])]
    public function update(int $id, ReconItemUpdateRequest $request): JsonResponse
    {
        $item = ReconciliationItemModel::find($id);
        if (empty($item)) {
            throw new RepositoryException('对账明细不存在');
        }
        $this->assertEditable($item);

        $validated = $request->validated();
        if (isset($validated['product_name'])) {
            $item->product_name = $validated['product_name'];
        }
        if (isset($validated['quantity'])) {
            $item->quantity = $validated['quantity'];
        }
        if (isset($validated['weight'])) {
            $item->weight = $validated['weight'];
        }
        if (isset($validated['publish_amount'])) {
            $item->publish_amount = $validated['publish_amount'];
        }
        if (isset($validated['actual_amount'])) {
            $item->actual_amount = $validated['actual_amount'];
        }
        // 重算本行差额
        $item->diff_amount = bcsub((string) $item->publish_amount, (string) $item->actual_amount, 2);
        $item->save();

        $this->refreshReconSummary((int) $item->recon_id);

        return $this->success(['diff_amount' => $item->diff_amount]);
    }

    /** D8 对账状态标记翻转 */
    #[PutRoute(route: '/{id}/toggle', authorize: 'item.update', where: ['id' => '[0-9]+'])]
    public function toggle(int $id): JsonResponse
    {
        $item = ReconciliationItemModel::find($id);
        if (empty($item)) {
            throw new RepositoryException('对账明细不存在');
        }
        $this->assertEditable($item);

        $item->is_reconciled = $item->is_reconciled === ReconciliationItemModel::RECONCILED
            ? ReconciliationItemModel::NOT_RECONCILED
            : ReconciliationItemModel::RECONCILED;
        $item->save();

        return $this->success(['is_reconciled' => $item->is_reconciled]);
    }

    /** D6 单品级门店备注 */
    #[PutRoute(route: '/{id}/remark', authorize: 'item.update', where: ['id' => '[0-9]+'])]
    public function remark(int $id, Request $request): JsonResponse
    {
        $data = $request->validate([
            'store_remark' => 'nullable|string|max:255',
        ], [
            'store_remark.max' => '备注最长 255 个字符',
        ]);
        $item = ReconciliationItemModel::find($id);
        if (empty($item)) {
            throw new RepositoryException('对账明细不存在');
        }
        $this->assertEditable($item);

        $item->store_remark = (string) ($data['store_remark'] ?? '');
        $item->save();

        return $this->success();
    }

    /**
     * 已结算的对账单明细不允许修改
     */
    private function assertEditable(ReconciliationItemModel $item): void
    {
        $recon = ReconciliationModel::find($item->recon_id);
        if ($recon !== null && $recon->status === ReconciliationModel::STATUS_SETTLED) {
            throw new RepositoryException('对账单已结算，明细不能修改');
        }
    }

    /**
     * 明细变更后重算对账单头汇总（publish / actual / diff）
     */
    private function refreshReconSummary(int $reconId): void
    {
        $sums = ReconciliationItemModel::query()
            ->where('recon_id', $reconId)
            ->selectRaw('COALESCE(SUM(publish_amount), 0) as publish_total, COALESCE(SUM(actual_amount), 0) as actual_total')
            ->first();

        ReconciliationModel::whereKey($reconId)->update([
            'publish_amount' => $sums->publish_total,
            'actual_amount' => $sums->actual_total,
            'diff_amount' => bcsub((string) $sums->publish_total, (string) $sums->actual_total, 2),
        ]);
    }
}