using Plugin.Permissions;
using Plugin.Permissions.Abstractions;
using System;
using System.Collections.Generic;
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 PageResale : ContentPage
    {
        private ResaleViewModel ViewModel;
        private UserInfo userInfo;
        private int CauseId = 1;
        private int DeviceId = 1;

        public PageResale(UserInfo userInfo)
        {
            InitializeComponent();
            this.userInfo = userInfo;
            this.BindingContext = ViewModel = new ResaleViewModel(userInfo.uid);
        }
        void OnCauseSelectedIndexChangedAsync(object sender, EventArgs e)
        {
            var picker = (Picker)sender;
            int selectedIndex = picker.SelectedIndex;
            if (selectedIndex != -1)
            {
                CauseId = ViewModel.CauseItems[selectedIndex].id;

            }
        }
        private async void Button_ClickedAsync(object sender, EventArgs e)
        {
            if (this.CauseId == 0)
            {
                await DisplayAlert("注意", "请选择产品再销售的原因", "OK"); return;
            }
            if (userInfo != null && SerialNumber.Text != null)
            {
                Dictionary<string, string> _body = new Dictionary<string, string>{
                    {"Sn", SerialNumber.Text},
                    {"Uid", userInfo.uid.ToString()},
                    {"CauseId", CauseId.ToString()},
                    {"deviceId", this.DeviceId.ToString()}
                };
                var request = await HttpHelper.RequestPost(18, _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 (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;
        }
    }
}