using ClaudeDo.Data.Models;
using ClaudeDo.Ui.Services;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using TaskStatus = ClaudeDo.Data.Models.TaskStatus;

namespace ClaudeDo.Ui.ViewModels;

public partial class TaskEditorViewModel : ViewModelBase
{
    [ObservableProperty] private string _title = "";
    [ObservableProperty] private string? _description;
    [ObservableProperty] private string _commitType = "chore";
    [ObservableProperty] private string _statusChoice = "manual";
    [ObservableProperty] private string _tagsInput = "";
    [ObservableProperty] private string _windowTitle = "New Task";
    [ObservableProperty] private string _modelChoice = "(list default)";
    [ObservableProperty] private string? _systemPromptOverride;
    [ObservableProperty] private AgentInfo? _selectedAgent;
    public List<AgentInfo> AvailableAgents { get; set; } = [];

    private string? _editId;
    private string _listId = "";
    private DateTime _createdAt;
    private TaskCompletionSource<TaskEntity?> _tcs = new();

    public event Action? RequestClose;

    public static string[] ModelChoices { get; } = ["(list default)", "Sonnet", "Opus", "Haiku"];

    public static string[] CommitTypes { get; } =
        ["chore", "feat", "fix", "refactor", "docs", "test", "perf", "style", "build", "ci"];

    public static string[] StatusChoices { get; } =
        ["manual", "queued"];

    public async Task LoadAgentsAsync(WorkerClient worker)
    {
        AvailableAgents = await worker.GetAgentsAsync();
    }

    public IReadOnlyList<string> SelectedTagNames =>
        TagsInput.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
            .Distinct()
            .ToList();

    public void InitForCreate(string listId, string defaultCommitType = "chore")
    {
        _editId = null;
        _listId = listId;
        _createdAt = DateTime.UtcNow;
        CommitType = defaultCommitType;
        WindowTitle = "New Task";
    }

    public void InitForEdit(TaskEntity entity, IReadOnlyList<TagEntity> taskTags)
    {
        _editId = entity.Id;
        _listId = entity.ListId;
        _createdAt = entity.CreatedAt;
        Title = entity.Title;
        Description = entity.Description;
        CommitType = entity.CommitType;
        StatusChoice = entity.Status switch
        {
            TaskStatus.Manual => "manual",
            TaskStatus.Queued => "queued",
            _ => entity.Status.ToString().ToLowerInvariant(),
        };
        TagsInput = string.Join(", ", taskTags.Select(t => t.Name));
        ModelChoice = entity.Model is not null
            ? ListEditorViewModel.ModelIdToDisplay(entity.Model)
            : "(list default)";
        SystemPromptOverride = entity.SystemPrompt;
        SelectedAgent = entity.AgentPath is not null
            ? AvailableAgents.FirstOrDefault(a => a.Path == entity.AgentPath)
            : null;
        WindowTitle = $"Edit Task: {entity.Title}";
    }

    [RelayCommand]
    private void Save()
    {
        if (string.IsNullOrWhiteSpace(Title)) return;
        var status = StatusChoice switch
        {
            "queued" => TaskStatus.Queued,
            _ => TaskStatus.Manual,
        };
        var entity = new TaskEntity
        {
            Id = _editId ?? Guid.NewGuid().ToString(),
            ListId = _listId,
            Title = Title.Trim(),
            Description = string.IsNullOrWhiteSpace(Description) ? null : Description.Trim(),
            Status = status,
            CommitType = CommitType,
            CreatedAt = _createdAt,
        };
        entity.Model = ModelChoice != "(list default)"
            ? ListEditorViewModel.ModelDisplayToId(ModelChoice)
            : null;
        entity.SystemPrompt = string.IsNullOrWhiteSpace(SystemPromptOverride) ? null : SystemPromptOverride.Trim();
        entity.AgentPath = SelectedAgent?.Path;
        _tcs.TrySetResult(entity);
        RequestClose?.Invoke();
    }

    [RelayCommand]
    private void Cancel()
    {
        _tcs.TrySetResult(null);
        RequestClose?.Invoke();
    }

    public void OnWindowClosed()
    {
        _tcs.TrySetResult(null);
    }

    public Task<TaskEntity?> ShowAndWaitAsync()
    {
        _tcs = new TaskCompletionSource<TaskEntity?>();
        return _tcs.Task;
    }
}