/******************************************************************************
// RomRepoMgr - ROM repository manager
// ----------------------------------------------------------------------------
//
// 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 © 2020-2024 Natalia Portillo
*******************************************************************************/

using System;
using System.Reactive;
using System.Threading.Tasks;
using ReactiveUI;
using RomRepoMgr.Core.EventArgs;
using RomRepoMgr.Core.Models;
using RomRepoMgr.Database;
using RomRepoMgr.Database.Models;
using RomRepoMgr.Views;

namespace RomRepoMgr.ViewModels;

public class EditDatViewModel : ViewModelBase
{
    readonly RomSetModel _romSet;
    readonly EditDat     _view;
    string               _author;
    string               _category;
    string               _comment;
    string               _date;
    string               _description;
    string               _homepage;
    bool                 _modified;
    string               _name;
    string               _version;

    public EditDatViewModel(EditDat view, RomSetModel romSet)
    {
        _view         = view;
        _romSet       = romSet;
        _name         = romSet.Name;
        _version      = romSet.Version;
        _author       = romSet.Author;
        _comment      = romSet.Comment;
        _category     = romSet.Category;
        _date         = romSet.Date;
        _description  = romSet.Description;
        _homepage     = romSet.Homepage;
        SaveCommand   = ReactiveCommand.CreateFromTask(ExecuteSaveCommandAsync);
        CancelCommand = ReactiveCommand.Create(ExecuteCloseCommand);
        CloseCommand  = ReactiveCommand.Create(ExecuteCloseCommand);
    }

    public ReactiveCommand<Unit, Unit> SaveCommand        { get; }
    public ReactiveCommand<Unit, Unit> CancelCommand      { get; }
    public ReactiveCommand<Unit, Unit> CloseCommand       { get; }
    public long                        TotalMachines      => _romSet.TotalMachines;
    public long                        CompleteMachines   => _romSet.CompleteMachines;
    public long                        IncompleteMachines => _romSet.IncompleteMachines;
    public long                        TotalRoms          => _romSet.TotalRoms;
    public long                        HaveRoms           => _romSet.HaveRoms;
    public long                        MissRoms           => _romSet.MissRoms;

    public bool Modified
    {
        get => _modified;
        set => this.RaiseAndSetIfChanged(ref _modified, value);
    }

    public string Name
    {
        get => _name;
        set
        {
            if(value != _name) Modified = true;

            this.RaiseAndSetIfChanged(ref _name, value);
        }
    }

    public string Version
    {
        get => _version;
        set
        {
            if(value != _version) Modified = true;

            this.RaiseAndSetIfChanged(ref _version, value);
        }
    }

    public string Author
    {
        get => _author;
        set
        {
            if(value != _author) Modified = true;

            this.RaiseAndSetIfChanged(ref _author, value);
        }
    }

    public string Comment
    {
        get => _comment;
        set
        {
            if(value != _comment) Modified = true;

            this.RaiseAndSetIfChanged(ref _comment, value);
        }
    }

    public string Category
    {
        get => _category;
        set
        {
            if(value != _category) Modified = true;

            this.RaiseAndSetIfChanged(ref _category, value);
        }
    }

    public string Date
    {
        get => _date;
        set
        {
            if(value != _date) Modified = true;

            this.RaiseAndSetIfChanged(ref _date, value);
        }
    }

    public string Description
    {
        get => _description;
        set
        {
            if(value != _description) Modified = true;

            this.RaiseAndSetIfChanged(ref _description, value);
        }
    }

    public string Homepage
    {
        get => _homepage;
        set
        {
            if(value != _homepage) Modified = true;

            this.RaiseAndSetIfChanged(ref _homepage, value);
        }
    }

    public EventHandler<RomSetEventArgs> RomSetModified { get; set; }

    void ExecuteCloseCommand() => _view.Close();

    async Task ExecuteSaveCommandAsync()
    {
        await using var ctx = Context.Create(Settings.Settings.Current.DatabasePath);

        RomSet romSetDb = await ctx.RomSets.FindAsync(_romSet.Id);

        if(romSetDb == null) return;

        romSetDb.Author      = Author;
        romSetDb.Comment     = Comment;
        romSetDb.Category    = Category;
        romSetDb.Date        = Date;
        romSetDb.Description = Description;
        romSetDb.Homepage    = Homepage;
        romSetDb.Name        = Name;
        romSetDb.Version     = Version;
        romSetDb.UpdatedOn   = DateTime.UtcNow;

        await ctx.SaveChangesAsync();

        RomSetModified?.Invoke(this,
                               new RomSetEventArgs
                               {
                                   RomSet = new RomSetModel
                                   {
                                       Author             = Author,
                                       Comment            = Comment,
                                       Category           = Category,
                                       Date               = Date,
                                       Description        = Description,
                                       Homepage           = Homepage,
                                       Name               = Name,
                                       Version            = Version,
                                       Filename           = _romSet.Filename,
                                       Sha384             = _romSet.Sha384,
                                       TotalMachines      = _romSet.TotalMachines,
                                       CompleteMachines   = _romSet.CompleteMachines,
                                       IncompleteMachines = _romSet.IncompleteMachines,
                                       TotalRoms          = _romSet.TotalRoms,
                                       HaveRoms           = _romSet.HaveRoms,
                                       MissRoms           = _romSet.MissRoms,
                                       Id                 = _romSet.Id
                                   }
                               });

        Modified = false;
    }
}