using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using AI.Models.Form;

namespace AI.Models.SpecialMessages
{
    /// <summary>
    /// 井点导入卡片的阶段
    /// </summary>
    public enum WellPointLoadPhase
    {
        SelectFile = 0,
        FileLoaded = 1,
        Completed = 2,
    }

    /// <summary>
    /// 井点数据导入综合卡片：选择文件 → 数据预览 → 列头匹配（井号/X/Y/Z）。
    /// </summary>
    public class WellPointLoadCardMessage : ISpecialMessage, INotifyPropertyChanged
    {
        private WellPointLoadPhase _phase = WellPointLoadPhase.SelectFile;
        private string _filePath = string.Empty;
        private bool _isLoading;
        private string _statusMessage = string.Empty;
        private TableDataMessage? _tablePreview;
        private string _matchButtonLabel = "确认匹配";

        public string Id { get; set; } = Guid.NewGuid().ToString();

        public string TypeName => "WellPointLoadCard";

        public bool IsLive => false;

        public WellPointLoadPhase Phase
        {
            get => _phase;
            set
            {
                if (SetProperty(ref _phase, value))
                {
                    OnPropertyChanged(nameof(IsFileInputEnabled));
                    OnPropertyChanged(nameof(ShowLoadButtons));
                    OnPropertyChanged(nameof(HasSubmittedFile));
                    OnPropertyChanged(nameof(ShowPreviewSection));
                    OnPropertyChanged(nameof(ShowMatchSection));
                    OnPropertyChanged(nameof(ShowMatchButton));
                }
            }
        }

        public bool IsLoading
        {
            get => _isLoading;
            set
            {
                if (SetProperty(ref _isLoading, value))
                {
                    OnPropertyChanged(nameof(ShowLoadButtons));
                    OnPropertyChanged(nameof(IsFileInputEnabled));
                }
            }
        }

        public string StatusMessage
        {
            get => _statusMessage;
            set
            {
                SetProperty(ref _statusMessage, value ?? string.Empty);
                OnPropertyChanged(nameof(HasStatusMessage));
            }
        }

        public bool HasStatusMessage => !string.IsNullOrEmpty(_statusMessage);

        public string FilePath
        {
            get => _filePath;
            set => SetProperty(ref _filePath, value ?? string.Empty);
        }

        public bool IsFileInputEnabled => Phase == WellPointLoadPhase.SelectFile && !IsLoading;

        public bool ShowLoadButtons => Phase == WellPointLoadPhase.SelectFile && !IsLoading;

        public bool ShowLoadingHint => IsLoading;

        public bool HasSubmittedFile => Phase != WellPointLoadPhase.SelectFile;

        public TableDataMessage? TablePreview
        {
            get => _tablePreview;
            set
            {
                if (SetProperty(ref _tablePreview, value))
                {
                    OnPropertyChanged(nameof(ShowPreviewSection));
                }
            }
        }

        public bool ShowPreviewSection => _tablePreview != null && Phase != WellPointLoadPhase.SelectFile;

        public ObservableCollection<FormFieldEntry> ColumnMatchFields { get; } = new();

        public string MatchButtonLabel
        {
            get => _matchButtonLabel;
            set => SetProperty(ref _matchButtonLabel, value);
        }

        public bool ShowMatchSection => Phase == WellPointLoadPhase.FileLoaded;

        public bool ShowMatchButton => Phase == WellPointLoadPhase.FileLoaded;

        public event PropertyChangedEventHandler? PropertyChanged;

        protected void OnPropertyChanged([CallerMemberName] string? propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(field, value))
            {
                return false;
            }

            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }
    }
}