<?php
namespace App\Controllers\PSI;

use App\Controllers\Controller;
use App\Models\PSI\Sales;
use App\Models\PSI\Product;
use App\Models\PSI\Material;

/** 销售出库：内销 + 外贸出口。出库自动扣减库存并校验库存充足 */
class SalesController extends Controller
{
    use StockHelper;


    public function index()
    {
        $sales = (new Sales())->all();
        return $this->renderSubsys('psi', 'psi/sales', ['sales' => $sales], \psi_nav(), 'sales');
    }

    public function create()
    {
        subsys_admin('psi') or \Core\App::forbidden('需要 PSI 管理员权限');
        $materials = (new \App\Models\PSI\Material())->all();
        $products  = (new \App\Models\PSI\Product())->all();
        return $this->renderSubsys('psi', 'psi/sale_form', [
            'sale' => null, 'materials' => $materials, 'products' => $products,
        ], \psi_nav(), 'sales');
    }

    public function store()
    {
        subsys_admin('psi') or \Core\App::forbidden('需要 PSI 管理员权限');
        if (!csrf_check()) return $this->redirect('PSI/sales');
        $itemType = $this->post('item_type') === 'material' ? 'material' : 'product';
        $itemId = (int)$this->post('item_id');
        $qty = (float)$this->post('qty');
        $price = (float)$this->post('price');
        if ($itemId <= 0 || $qty <= 0) { $this->flash('请选择有效的成品/物料并填写数量'); return $this->redirect('PSI/sales'); }
        $model = $itemType === 'product' ? new Product() : new Material();
        $item = $model->find($itemId);
        if (!$item || (float)($item['stock'] ?? 0) < $qty) {
            $this->flash('库存不足，无法出库（当前库存：' . (isset($item) ? (float)$item['stock'] : 0) . '）');
            return $this->redirect('PSI/sales');
        }
        $no = 'SO' . date('Ymd') . '-' . substr(uniqid(), -4);
        $saleId = (new Sales())->insert([
            'order_no'   => $no,
            'customer'   => trim($this->post('customer')),
            'channel'    => $this->post('channel') === 'export' ? 'export' : 'domestic',
            'region'     => trim($this->post('region')),
            'item_id'    => $itemId,
            'item_type'  => $itemType,
            'qty'        => $qty,
            'price'      => $price,
            'amount'     => $qty * $price,
            'status'     => 'shipped',
            'batch_no'   => trim($this->post('batch_no')),
            'remark'     => trim($this->post('remark')),
            'created_at' => date('Y-m-d'),
        ]);
        $this->adjustStock($itemType, $itemId, $qty, 'out', $no, trim($this->post('batch_no')));
        $this->flash('销售出库成功，库存已扣减', 'ok');
        if ($this->post('auto_print', '1') !== '0') {
            return $this->redirect('PSI/sales/print/' . $saleId);
        }
        return $this->redirect('PSI/sales');
    }

    public function show($id)
    {
        $sale = (new Sales())->find($id);
        if (!$sale) { \Core\App::notFound('销售记录不存在'); return; }
        $itemInfo = $this->lookupItem($sale['item_id'] ?? 0, $sale['item_type'] ?? '');
        return $this->renderSubsys('psi', 'psi/sales_show', [
            's'  => $sale,
            'item' => $itemInfo,
        ], \psi_nav(), 'sales');
    }

    public function printDoc($id)
    {
        $sale = (new Sales())->find($id);
        if (!$sale) { \Core\App::notFound('销售记录不存在'); return; }
        $itemInfo = $this->lookupItem($sale['item_id'] ?? 0, $sale['item_type'] ?? '');
        $body = \Core\View::buffer('psi/sales_print', ['s' => $sale, 'item' => $itemInfo]);
        echo \psi_print_shell('销售出库单 - ' . e($sale['order_no']), $body);
    }

    /** 尝试从成品表或物料表查找物品信息 */
    private function lookupItem(int $itemId, string $itemType = ''): array
    {
        if ($itemId <= 0) return ['name' => '—', 'spec' => '', 'unit' => ''];
        if ($itemType === 'material') {
            $row = (new Material())->find($itemId);
        } else {
            $row = (new Product())->find($itemId) ?: (new Material())->find($itemId);
        }
        if ($row) return ['name' => $row['name'] ?? '—', 'spec' => $row['spec'] ?? '', 'unit' => $row['unit'] ?? ''];
        return ['name' => '—', 'spec' => '', 'unit' => ''];
    }

    public function destroy($id)
    {
        subsys_admin('psi') or \Core\App::forbidden('需要 PSI 管理员权限');
        (new Sales())->delete($id);
        return $this->redirect('PSI/sales');
    }
}