using LocalhostMES.DataBase;
using LocalhostMES.Enums;
using LocalhostMES.Core;
using LocalhostMES.Models;
using LocalhostMES.ViewModels.Services;
using Prism.Commands;
using Prism.Mvvm;
using System.Collections.ObjectModel;
using System.Windows;

namespace LocalhostMES.ViewModels.Tabs
{
    public class KeyPartManagementViewModel : BindableBase
    {
        private readonly IMesWorkspace _workspace;

        public KeyPartManagementViewModel(IMesWorkspace workspace)
        {
            _workspace = workspace;
            _workspace.Initialize();
            MesDataChangedNotifier.Changed += OnDataChanged;
        }

        private ObservableCollection<LocalhostPartInfo> _partInfos = new ObservableCollection<LocalhostPartInfo>();
        public ObservableCollection<LocalhostPartInfo> PartInfos
        {
            get => _partInfos;
            set => SetProperty(ref _partInfos, value);
        }

        private LocalhostPartInfo _newPart = new LocalhostPartInfo();
        public LocalhostPartInfo NewPart
        {
            get => _newPart;
            set => SetProperty(ref _newPart, value);
        }

        private LocalhostPartInfo _selectPart;
        public LocalhostPartInfo SelectPart
        {
            get => _selectPart;
            set => SetProperty(ref _selectPart, value);
        }

        private string _statusMessage = string.Empty;
        public string StatusMessage
        {
            get => _statusMessage;
            set => SetProperty(ref _statusMessage, value);
        }

        private DelegateCommand _addPartInfoCommand;
        public DelegateCommand AddPartInfoCommand =>
            _addPartInfoCommand ?? (_addPartInfoCommand = new DelegateCommand(AddPartInfo));

        private DelegateCommand _refPartInfoCommand;
        public DelegateCommand RefPartInfoCommand =>
            _refPartInfoCommand ?? (_refPartInfoCommand = new DelegateCommand(RefPartInfo));

        private DelegateCommand _deletePartInfoCommand;
        public DelegateCommand DeletePartInfoCommand =>
            _deletePartInfoCommand ?? (_deletePartInfoCommand = new DelegateCommand(DeletePartInfo));

        private DelegateCommand<LocalhostPartInfo> _deletePartRowCommand;
        public DelegateCommand<LocalhostPartInfo> DeletePartRowCommand =>
            _deletePartRowCommand ?? (_deletePartRowCommand = new DelegateCommand<LocalhostPartInfo>(DeletePartRow, p => p != null));

        private void AddPartInfo()
        {
            var pn = (NewPart.PartNum ?? string.Empty).Trim();
            if (string.IsNullOrEmpty(pn))
            {
                _workspace.ShowStatus("请填写关键件号", true);
                return;
            }

            if (NewPart.PartQty < 0)
            {
                _workspace.ShowStatus("数量不能为负数", true);
                return;
            }

            var st = NewPart.StationType;
            var toSave = new LocalhostPartInfo
            {
                StationType = st,
                PartNum = pn,
                PartQty = NewPart.PartQty
            };

            if (DatabaseHelper.InsertPartInfo(toSave))
            {
                NewPart = new LocalhostPartInfo { StationType = st };
                _workspace.ShowStatus("关键件已保存", false);
                RefPartInfo();
            }
            else
            {
                _workspace.ShowStatus("保存失败（可能已存在相同工站类型+关键件号）", true);
            }
        }

        private void RefPartInfo()
        {
            var st = NewPart.StationType;
            PartInfos = new ObservableCollection<LocalhostPartInfo>(DatabaseHelper.SelectPartInfo(st));
            StatusMessage = $"工站 {st}，共 {PartInfos.Count} 条";
        }

        private void DeletePartInfo()
        {
            if (SelectPart == null)
            {
                _workspace.ShowStatus("请先选择要删除的关键件行", true);
                return;
            }

            if (DatabaseHelper.DeletePartInfo(SelectPart.StationType, SelectPart.PartNum))
            {
                RefPartInfo();
                _workspace.ShowStatus("已删除", false);
            }
            else
            {
                _workspace.ShowStatus("删除失败", true);
            }
        }

        private void DeletePartRow(LocalhostPartInfo part)
        {
            if (part == null)
            {
                return;
            }

            if (DatabaseHelper.DeletePartInfo(part.StationType, part.PartNum))
            {
                PartInfos.Remove(part);
                _workspace.ShowStatus("已删除", false);
            }
            else
            {
                _workspace.ShowStatus("删除失败", true);
            }
        }

        private void OnDataChanged(object sender, MesDataChangedEventArgs e)
        {
            if (!e.Has(MesDataScope.KeyPart))
            {
                return;
            }

            Application.Current?.Dispatcher.Invoke(RefPartInfo);
        }
    }
}