using Plugin.Permissions;
using Plugin.Permissions.Abstractions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XXCpzs.helper;
using XXCpzs.Models;
using XXCpzs.ViewModels;
using ZXing.Mobile;

namespace XXCpzs.Views
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class PageSale : ContentPage
    {
        private SaleViewModel ViewModel;
        private int deviceId = 1;
        private UserInfo userInfo;

        public PageSale(UserInfo userInfo)
        {
            InitializeComponent();
            this.userInfo = userInfo;
            this.BindingContext = ViewModel = new SaleViewModel();
        }
        private async void ButtonCustomerSelect_Clicked(object sender, EventArgs e)
        {
            await Navigation.PushModalAsync(new NavigationPage(new PageCustomerSelect(userInfo)));
        }
        private async void Button_ClickedAsync(object sender, EventArgs e)
        {
            if (userInfo != null && ViewModel.CustomerId != 0 && SerialNumber.Text != null)
            {
                Dictionary<string, string> _body = new Dictionary<string, string>{
                    {"Sn", SerialNumber.Text},
                    {"Uid", userInfo.uid.ToString()},
                    {"CustomerId", ViewModel.CustomerId.ToString()},
                    {"deviceId", this.deviceId.ToString()}
                };
                var request = await HttpHelper.RequestPost(16, _body);
                if (request.Code == 200){
                    ViewModel.Items.Add(new ResultModel() { Code = request.Code, Data = request.Data, Msg = request.Msg });
                }
                else{
                    await DisplayAlert("访问出错", request.Msg, "OK");
                }
            }
        }
        private async void OnScan(object sender, EventArgs e)
        {
            if (this.ViewModel.CustomerId == 0)
            {
                await DisplayAlert("注意", "请选择产品 购买的客户", "OK"); return;
            }
            if (await CheckPerssion())
            {
                var scanner = new MobileBarcodeScanner();
                var result = await scanner.Scan();
                if (result != null)
                {
                    SerialNumber.Text = result.Text;
                    Button_ClickedAsync(sender, e);
                }
            }
        }
        private async Task<bool> CheckPerssion()
        {
            var current = CrossPermissions.Current;
            //检查权限
            var status = await current.CheckPermissionStatusAsync(Permission.Camera);
            if (status != PermissionStatus.Granted)
            {
                var result = await current.RequestPermissionsAsync(Permission.Camera);
                status = result[Permission.Camera];
            }
            return status == PermissionStatus.Granted;
        }

    }
}