using CommunityToolkit.Mvvm.ComponentModel;
using DashCaddy.Desktop.Models;
using DashCaddy.Desktop.Services;
using System.Collections.ObjectModel;
using System.Collections.Generic;

namespace DashCaddy.Desktop.ViewModels;

public partial class MainViewModel : ObservableObject
{
    private readonly DockerService _dockerService;
    private readonly ApiClient _apiClient;
    private readonly CaddyConfigGenerator _caddyGenerator;
    private readonly DnsClient _dnsClient;

    [ObservableProperty]
    private ObservableCollection<ServiceViewModel> _services = new();

    [ObservableProperty]
    private int _servicesHealthy;

    [ObservableProperty]
    private int _servicesTotal;

    [ObservableProperty]
    private bool _dnsHealthy = true;

    [ObservableProperty]
    private bool _certsHealthy = true;

    [ObservableProperty]
    private int _certsDaysRemaining = 45;

    // For dialogs
    public ObservableCollection<ServiceTemplate> Templates { get; } = new(TemplateRegistry.GetAll());
    public List<VariableViewModel> TemplateVariables { get; set; } = new();
    public Dictionary<string, string> TemplateVariablesDict { get; set; } = new();
    public ServiceTemplate SelectedTemplate { get; set; }
    public string SelectedComposeFile { get; set; }
    public object CustomService { get; set; }

    public string ServicesSummary => $"{ServicesHealthy}/{ServicesTotal} running";
    public string CertsSummary => $"{CertsDaysRemaining} days";
    public string DashboardUrl => "https://status.local";

    public MainViewModel(DockerService dockerService, ApiClient apiClient, CaddyConfigGenerator caddyGenerator, DnsClient dnsClient)
    {
        _dockerService = dockerService;
        _apiClient = apiClient;
        _caddyGenerator = caddyGenerator;
        _dnsClient = dnsClient;
    }

    public async Task InitializeAsync()
    {
        await RefreshServicesAsync();
        await CheckHealthAsync();
    }

    public async Task RefreshServicesAsync()
    {
        try
        {
            var services = await _apiClient.GetServicesAsync();
            Services.Clear();
            foreach (var svc in services)
            {
                Services.Add(new ServiceViewModel
                {
                    Id = svc.Id,
                    Name = svc.Name,
                    Type = svc.Type,
                    Url = svc.Url,
                    Health = Enum.TryParse<ServiceHealth>(svc.Health, true, out var h) ? h : ServiceHealth.Unknown,
                    IsRunning = svc.State == "running",
                    Port = svc.Port,
                    Host = svc.Host
                });
            }
            ServicesHealthy = Services.Count(s => s.Health == ServiceHealth.Healthy);
            ServicesTotal = Services.Count;
        }
        catch
        {
            await RefreshFromDockerAsync();
        }
    }

    private async Task RefreshFromDockerAsync()
    {
        var containers = await _dockerService.GetContainersAsync("dashcaddy");
        Services.Clear();
        foreach (var c in containers)
        {
            Services.Add(new ServiceViewModel
            {
                Id = c.ID[..12],
                Name = c.Names.FirstOrDefault()?.TrimStart('/') ?? "unknown",
                Type = "docker",
                Url = $"http://localhost:{c.Ports.FirstOrDefault()?.PublicPort ?? 0}",
                Health = c.State == "running" ? ServiceHealth.Healthy : ServiceHealth.Unhealthy,
                IsRunning = c.State == "running"
            });
        }
        ServicesHealthy = Services.Count(s => s.Health == ServiceHealth.Healthy);
        ServicesTotal = Services.Count;
    }

    public async Task CheckHealthAsync()
    {
        try
        {
            var health = await _apiClient.GetHealthAsync();
            DnsHealthy = health.Dns == "healthy";
            CertsHealthy = health.Certs == "healthy";
            CertsDaysRemaining = health.CertsDaysRemaining;
        }
        catch
        {
            DnsHealthy = false;
            CertsHealthy = false;
        }
    }

    public async Task StartServiceAsync(string id) => await _dockerService.StartContainerAsync(id);
    public async Task StopServiceAsync(string id) => await _dockerService.StopContainerAsync(id);
    public async Task RestartServiceAsync(string id) => await _dockerService.RestartContainerAsync(id);

    public async Task RemoveServiceAsync(string id)
    {
        await _dockerService.RemoveContainerAsync(id);
        await _apiClient.RemoveServiceAsync(id);
        _caddyGenerator.RegenerateConfig(Services.Select(s => s.ToServiceModel()).ToList());
        await _caddyGenerator.ReloadCaddyAsync();
    }

    public async Task ImportComposeAsync(string filePath)
    {
        var json = await File.ReadAllTextAsync(filePath);
        var services = ComposeParser.ParseJson(json);
        
        foreach (var svc in services)
        {
            await _apiClient.CreateServiceAsync(svc);
            await _dockerService.CreateContainerAsync(svc);
        }
        
        _caddyGenerator.RegenerateConfig(Services.Select(s => s.ToServiceModel()).ToList());
        await _caddyGenerator.ReloadCaddyAsync();
    }

    public async Task<ServiceModel> CreateServiceFromTemplateAsync()
    {
        if (SelectedTemplate == null) return null;
        
        var service = SelectedTemplate.Instantiate(TemplateVariablesDict);
        
        await _apiClient.CreateServiceAsync(service);
        await _dockerService.CreateContainerAsync(service);
        
        _caddyGenerator.RegenerateConfig(Services.Select(s => s.ToServiceModel()).ToList());
        await _caddyGenerator.ReloadCaddyAsync();
        
        return service;
    }
}