using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace Neighbourhood.omg.lol.Models {
  public class State {
    public AccountResponseData? AccountInfo { get; set; }
    public AddressResponseList? AddressList { get; set; }

    public string? Name { get => AccountInfo?.Name; }
    public string? Email { get => AccountInfo?.Email; }
    public IEnumerable<string>? AddressNames { get => AddressList?.Select(a => a.Address); }
    public AddressResponseData? SelectedAddress { get; set; }
    public string? SelectedAddressName { get => SelectedAddress?.Address; }

    public List<Status>? Statuses { get; set; }

    public async Task PopulateAccountDetails(string token) {
      RestService api = new RestService(token);

      string accountJson = Preferences.Default.Get("accountdetails", string.Empty);
      string addressJson = Preferences.Default.Get("accountaddresses", string.Empty);
      string selectedAddressJson = Preferences.Default.Get("selectedaddress", string.Empty);

      if (!string.IsNullOrEmpty(accountJson)) AccountInfo = JsonSerializer.Deserialize<AccountResponseData>(accountJson);
      if (!string.IsNullOrEmpty(addressJson)) AddressList = JsonSerializer.Deserialize<AddressResponseList>(addressJson);
      if (!string.IsNullOrEmpty(selectedAddressJson)) SelectedAddress = JsonSerializer.Deserialize<AddressResponseData>(selectedAddressJson);

      // if we haven't got account info, attempt to retrieve it.
      if (AccountInfo == null) {
        AccountInfo = await api.AccountInfo();
        if (AccountInfo != null) {
          Preferences.Default.Set("accountdetails", JsonSerializer.Serialize(AccountInfo));
        }
      }

      // if we don't have the list of addresses, attempt to retrieve that.
      if (AddressList == null) {
        AddressList = await api.Addresses();
        if (AddressList != null) {
          Preferences.Default.Set("accountaddresses", JsonSerializer.Serialize(AddressList));
          SelectedAddress = AddressList.FirstOrDefault();
          Preferences.Default.Set("selectedaddress", JsonSerializer.Serialize(SelectedAddress));
        }
      }
    }

    public async Task RemoveAccountDetails() {
      Preferences.Default.Clear();
      AccountInfo = null;
      AddressList = null;
      SelectedAddress = null;

    }

    public async Task<Status[]?> GetStatuses(bool forceRefresh = false) {
      RestService api = new RestService();
      if (forceRefresh || this.Statuses == null || this.Statuses.Count == 0) {
        Debug.WriteLine("Downloading statuses from server");
        this.Statuses = await api.StatuslogLatest();
      }
      //else Task.Run(async () => this.Statuses = await api.StatuslogLatest()); // not awaited on purpose
      return this.Statuses.ToArray();
    }

    public async Task RefreshStatuses() {
      RestService api = new RestService();
      this.Statuses = await api.StatuslogLatest();
    }
  }
}