/******************************************************************************
// MARECHAI: Master repository of computing history artifacts information
// ----------------------------------------------------------------------------
//
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2003-2021 Natalia Portillo
*******************************************************************************/

using System.Collections.Generic;
using System.Threading.Tasks;
using Marechai.ViewModels;
using Microsoft.AspNetCore.Components;

namespace Marechai.Pages.Computers
{
    public partial class Search
    {
        char?                  _character;
        List<MachineViewModel> _computers;
        bool                   _loaded;
        string                 _startingCharacter;
        int?                   _year;

        [Parameter]
        public int? Year
        {
            get => _year;
            set
            {
                if(_year == value)
                    return;

                _year   = value;
                _loaded = false;
            }
        }

        [Parameter]
        public string StartingCharacter
        {
            get => _startingCharacter;
            set
            {
                if(_startingCharacter == value)
                    return;

                _startingCharacter = value;
                _loaded            = false;
            }
        }

        protected override async Task OnAfterRenderAsync(bool firstRender)
        {
            if(_loaded)
                return;

            _character = null;

            if(!string.IsNullOrWhiteSpace(StartingCharacter) &&
               StartingCharacter.Length == 1)
            {
                _character = StartingCharacter[0];

                // ToUpper()
                if(_character >= 'a' &&
                   _character <= 'z')
                    _character -= (char)32;

                // Check if not letter or number
                if(_character < '0'                       ||
                   (_character > '9' && _character < 'A') ||
                   _character > 'Z')
                    _character = null;
            }

            if(_character.HasValue)
                _computers = await Service.GetComputersByLetterAsync(_character.Value);

            if(Year.HasValue &&
               _computers is null)
                _computers = await Service.GetComputersByYearAsync(Year.Value);

            _computers ??= await Service.GetComputersAsync();
            _loaded    =   true;
            StateHasChanged();
        }
    }
}