<?php

namespace app\controller;

use support\Request;
use app\model\Goods;
use app\model\GoodsReceipt;
use app\model\SaleLog;
use think\facade\Db;

class GoodsController
{
    //商品列表
    public function index(Request $request)
    {
        $name = $request->get('name', '');
        $order = $request->get('order', 'stock_desc');
        return view('goods/index', ['name' => $name, 'order' => $order]);
    }

    //添加商品
    public function add(Request $request)
    {
        $method = $request->method();
        if($method == 'POST')
        {
            $name           = $request->post('name');
            $price          = $request->post('price');
            $remark         = $request->post('remark');
            $stock          = $request->post('stock');
            $stock_small    = $request->post('stock_small');
            $sales          = $request->post('sales');
            $sales_small    = $request->post('sales_small');
            $split_to_small = $request->post('split_to_small');

            $old = Goods::getByName($name);
            if(!$old->isEmpty()){
                return json(['code' => 1, 'msg' => '已存在此商品']);
            }

            $goodsModel = new Goods;
            $goodsModel->save([
                'name'            => $name,
                'price'           => $price,
                'stock'           => $stock,
                'stock_small'     => $stock_small,
                'sales'           => $sales,
                'sales_small'     => $sales_small,
                'split_to_small'  => $split_to_small,
                'remark'          => $remark
            ]);

            return json(['code' => 0, 'msg' => 'ok']);
        }

        return view('goods/add', []);
    }

    //编辑商品
    public function edit(Request $request)
    {
        $method = $request->method();
        if($method == 'POST')
        {
            $name           = $request->post('name');
            $price          = $request->post('price');
            $remark         = $request->post('remark');
            $stock          = $request->post('stock');
            $stock_small    = $request->post('stock_small');
            $sales          = $request->post('sales');
            $sales_small    = $request->post('sales_small');
            $split_to_small = $request->post('split_to_small');
            $id             = $request->post('id');
// return json([
//     'id'             => $id,
//     'name'           => $name,
//     'price'          => $price,
//     'stock'          => $stock,
//     'stock_small'    => $stock_small,
//     'sales'          => $sales,
//     'sales_small'    => $sales_small,
//     'split_to_small' => $split_to_small,
//     'remark'         => $remark
// ]);
            try{
                Goods::updateByID($id,
                [
                    'name'           => $name,
                    'price'          => $price,
                    'stock'          => $stock,
                    'stock_small'    => $stock_small,
                    'sales'          => $sales,
                    'sales_small'    => $sales_small,
                    'split_to_small' => $split_to_small,
                    'remark'         => $remark
                ]);
                return json(['code' => 0, 'msg' => 'ok']);
            }catch(\Exception $e){
                return json(['code' => 1, 'msg' => $e->getMessage()]);
            }


        }

        $id = $request->get('id');
        $goods = Goods::getByID($id);

        return view('goods/edit', ['goods' => $goods]);
    }

    //商品入库日志
    public function receipt(Request $request)
    {
        return view('goods/receipt', []);
    }

    public function addReceipt(Request $request)
    {
        $method = $request->method();
        if($method == 'POST')
        {
            Db::startTrans();
            try {
                $goodsID    = $request->post('goods_id');
                $boughtAt   = $request->post('bought_at');
                $num        = $request->post('num');
                $totalPrice = $request->post('total_price');
                $remark     = $request->post('remark');

                if($goodsID <= 0){
                    return json(['code' => 1, 'msg' => '请选择商品']);
                }

                if($totalPrice <= 0){
                    return json(['code' => 2, 'msg' => '进货总价必须大于0']);
                }

                if($boughtAt == ''){
                    return json(['code' => 3, 'msg' => '请选择进货日期']);
                }
                $goods = Goods::getByID($goodsID);
                if($goods->isEmpty()){
                    return json(['code' => 4, 'msg' => '商品不存在']);
                }

                $splitToSmall = $goods['split_to_small'] ?: 1;
                $costPrice = bcdiv($totalPrice, $num, 2); //计算大包单价
                $smallCostPrice = bcdiv($costPrice, $splitToSmall, 2); //计算小包单价

                GoodsReceipt::create([
                    'goods_id'         => $goodsID,
                    'num'              => $num,
                    'total_price'      => $totalPrice,
                    'cost_price'       => $costPrice,
                    'small_cost_price' => $smallCostPrice,
                    'bought_at'        => $boughtAt,
                    'split_to_small'   => $splitToSmall,
                    'created_at'       => date('Y-m-d H:i:s'),
                    'remark'           => $remark
                ]);

                Goods::updateByID($goodsID, ['stock' => $goods['stock'] + $num]);

                Db::commit();
                return json(['code' => 0, 'msg' => 'ok']);
            } catch (\Exception $e) {
                Db::rollback();
                return json(['code' => 5, 'msg' => $e->getMessage()]);
            }
        }

        $goodsList = Goods::getPageList('', 100);

        return view('goods/addReceipt', ['goodsList' => $goodsList]);
    }

    //商品销售日志
    public function sale(Request $request)
    {
        $goodsID = $request->get('id');
        $goods   = Goods::getByID($goodsID);

        $goodsList = Goods::getPageList('', 100);

        return view('goods/sale', ['goods' => $goods, 'goodsID' => $goodsID, 'goodsList' => $goodsList]);
    }

    public function addSale(Request $request)
    {
        $method = $request->method();
        if($method == 'POST')
        {
            Db::startTrans();
            try {
                $goodsID    = $request->post('goods_id');
                $sold_at    = $request->post('sold_at');
                $num        = $request->post('num', 0);
                $num_small  = $request->post('num_small', 0);
                $totalPrice = $request->post('total_price');
                $remark     = $request->post('remark');

                if($goodsID <= 0){
                    return json(['code' => 1, 'msg' => '请选择商品']);
                }

                if($totalPrice <= 0){
                    return json(['code' => 2, 'msg' => '销售总价必须大于0']);
                }

                if($sold_at == ''){
                    return json(['code' => 3, 'msg' => '请选择销售时间']);
                }

                if (empty($num) && empty($num_small)) {
                    return json(['code' => 4, 'msg' => '大包销量和小包销量不能同时为空']);
                }
                if(empty($num)){
                    $num = 0;
                }
                if(empty($num_small)){
                    $num_small = 0;
                }

                $goods = Goods::getByID($goodsID);

                if($goods->isEmpty()){
                    return json(['code' => 5, 'msg' => '商品不存在']);
                }

                // 小包库存不足时，没有自动拆分大包的操作
                if ($goods->stock < $num || $goods->stock_small < $num_small) {
                    return json(['code' => 6, 'msg' => '商品库存不足']);
                }

                SaleLog::create([
                    'goods_id'    => $goodsID,
                    'num'         => $num,
                    'num_small'   => $num_small,
                    'total_price' => $totalPrice,
                    'sold_at'     => $sold_at,
                    'remark'      => $remark
                ]);

                Goods::updateByID($goodsID, [
                    'sales'       => $goods->sales + $num,
                    'sales_small' => $goods->sales_small + $num_small,
                    'stock'       => $goods->stock - $num,
                    'stock_small' => $goods->stock_small - $num_small
                ]);

                Db::commit();
                return json(['code' => 0, 'msg' => 'ok']);
            } catch (\Exception $e) {
                Db::rollback();
                return json(['code' => 7, 'msg' => $e->getMessage()]);
            }
        }

        $goodsList = Goods::getPageList('', 100);

        return view('goods/addSale', ['goodsList' => $goodsList]);
    }

    //获取商品列表
    public function apiGetList(Request $request)
    {
        $name = $request->get('name', '');
        $order = $request->get('order', 'stock_desc');
        $pageSize = $request->get('size', 20);
        $goodsList = Goods::getPageList($name, $pageSize, str_replace('_', ' ', $order));

        return json(['code' => 0, 'msg' => 'ok', 'goodsList' => $goodsList]);
    }

    //获取进货列表
    public function apiGetReceiptList(Request $request)
    {
        $pageSize = $request->get('size', 20);
        $receiptList = GoodsReceipt::getPageList($pageSize);

        return json(['code' => 0, 'msg' => 'ok', 'receiptList' => $receiptList]);
    }

    public function apiGetSaleList(Request $request)
    {
        $pageSize = $request->get('size', 20);
        $saleList = SaleLog::getPageList($pageSize);

        return json(['code' => 0, 'msg' => 'ok', 'saleList' => $saleList]);
    }

    public function apiDelReceipt(Request $request)
    {
        $method = $request->method();
        if($method == 'POST')
        {
            $id           = $request->post('id');
            $goodsReceipt = GoodsReceipt::getByID($id);

            if($goodsReceipt->isEmpty()){
                return json(['code' => 1, 'msg' => '进货记录不存在']);
            }

            Db::startTrans();
            try {
                $goodsID = $goodsReceipt['goods_id'];
                $num     = $goodsReceipt['num'];

                $goods = Goods::getByID($goodsID);
                if($goods->isEmpty()){
                    return json(['code' => 2, 'msg' => '商品不存在']);
                }

                GoodsReceipt::destroy($id);
                Goods::updateByID($goodsID, ['stock' => $goods['stock'] - $num]);

                Db::commit();
                return json(['code' => 0, 'msg' => 'ok']);
            } catch (\Exception $e) {
                Db::rollback();
                return json(['code' => 3, 'msg' => $e->getMessage()]);
            }
        }

        return json(['code' => 4, 'msg' => '请求方式错误']);
    }
}