<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\AgentProduct;
use App\Models\UserMoneyLog;
use App\Models\Order;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

/**
 * 订单
 * Class OrderController
 * @package App\Http\Controllers\Api
 */
class OrderController extends Controller
{
	//订单列表
    public function index(Request $request)
	{
		$formData = $request->only(['page', 'status']);
		$request->validate([
			'page' => 'regex:/^\d+$/',
			'status' => 'integer'
		], [
			'page.regex' => '页码错误',
			'status.integer' => '未指定订单状态'
		]);

		if (array_key_exists('status', $formData) && $formData['status'] !== null) {
			$where['status'] = $formData['status'];
		}
		$where['user_id'] = $this->user_id;

		$list = Order::where($where)
			->with(['product' => fn($query) => $query->select('id', 'title', 'pictures')])
			->select('id', 'product_id', 'price', 'num', 'created_at')
			->orderBy('id', 'DESC')
			->simplePaginate(15);
		return $this->success($list);
	}

	public function create(Request $request)
	{
		$formData = $request->only(['id', 'name', 'mobile', 'pay_type', 'num']);
		$formData = array_map(fn($v) => trim($v), $formData); //过滤，删除首尾空

		//表单验证
		$request->validate([
			'id' => ['required', 'regex:/^\d+$/'],
			'name' => ['required', 'between:2,20'],
			'mobile' => ['required', 'regex:/^1[3-9]\d{9}$/'],
			'pay_type' => ['required', 'in:0,1,2'],
			'num' => ['required', 'min:1'],
		], [
			'id.required' => '未指定产品ID',
			'name.required' => '请输入联系人姓名',
			'mobile.required' => '请输入联系手机号',
			'id.regex' => '产品ID错误',
			'name.between' => '联系人姓名在2~20字符之间',
			'mobile.regex' => '请输入11位手机号',
			'pay_type.required' => '请选择支付方式',
			'pay_type.in' => '不存在此支付方式',
			'num.required' => '请输入购买数量',
			'num.min' => '购买数量输入错误',
		]);

		$agent_product = AgentProduct::query()
			->where('id', $formData['id'])
			->with('coupon')
			->with('product')
			->first();
		if (!$agent_product || !$agent_product->product) {
			$this->error('产品不存在');
		}

		DB::beginTransaction();
		try {
			$price = $this->calc($agent_product, $formData['num']);
			$title = $agent_product->product->title; //产品标题
			//增加销量
			$agent_product->increment('sale', $formData['num']); //代理商产品表销量
			$agent_product->product->increment('sale', $formData['num']); //供应商产品表

			// 存入订单表
			$order = Order::query()->create([
				'user_id' => $this->user_id,
				'order_no' => $this->getOrderNo(),
				'num' => $formData['num'],
				'price' => $price,
				'name' => $formData['name'],
				'mobile' => $formData['mobile'],
				'title' => $title,
				'agent_product_id' => $agent_product->id,
				'product_id' => $agent_product->product_id,
				'status' => 0,
				'pay_type' => $formData['pay_type'],
			]);

			//资金流水
			UserMoneyLog::query()->create([
				'user_id' => $this->user_id,
				'agent_id' => $this->agent_id,
				'money' => -$price,
				'order_id' => $order->id,
				'type' => 1,
				'desc' => '购买产品：' . $title,
				'created_at' => time(), //已关闭模型自动写入时间
			]);

			DB::commit();
		} catch (\Exception $e) {
			DB::rollBack();
			return $e->getMessage();
		}
		return $this->success();
	}

	//获取应付金额
	public function getPrice(Request $request)
	{
		$id = (int)$request->input('id');

		$num = (float)$request->input('num');
		if (!$num || $num < 1) {
			return $this->error('未指定产品数量');
		}

		$agent_product = AgentProduct::query()
			->with(['coupon' => fn($query) => $query->select('*')])
			->find($id);
		$final_price = $this->calc($agent_product, $num);
		return $this->success(['price' => $final_price]);
	}

	/**
	 * 计算最终价格（扣除优惠券之后的价格）
	 * @param $agent_product
	 * @param $num
	 * @return float
	 */
	private function calc($agent_product, $num)
	{
		$total_price = $agent_product->price * $num;
		//没有任何优惠券时直接返回最终价
		if ($agent_product->coupon->isEmpty()) {
			return $total_price;
		}

		$coupon = $agent_product->coupon->toArray();
		foreach ($coupon as $v) {
			if ($v['type'] == 1 && !empty($v['detail']['full']) && !empty($v['detail']['reduction'])) { //满减
				if ($total_price >= $v['detail']['full']) {
					$total_price -= $v['detail']['reduction'];
				}
			} else if ($v['type'] == 2 && !empty($v['detail']['discount'])) { //打折
				$total_price *= $v['detail']['discount'];
			}
		}
		return round($total_price, 2);
	}

	// 生成订单号
	private function getOrderNo()
	{
		list($micro, $sec) = explode(' ', microtime());
		$micro = str_pad(floor($micro * 1000000), 6, 0, STR_PAD_LEFT);
		return date('YmdHis', $sec) . $micro . mt_rand(100, 999);
	}
}