using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Threading.Tasks;
using Avalonia.Controls;
using Newtonsoft.Json;

namespace CrossLangDevStudio.Models;

public class ProjectPackageManager : IPackageManager
{
    public ProjectPackageManager(string path)
    {
        Path = path;
    }
    public string Path { get; init; }
    public string Filter => "lib,compile_tool";

    public IEnumerable<CrossLangDependency> GetInstalledPackages()
    {
        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(File.ReadAllText(Path));
        if (cfg is not null)
        {
            foreach (var item in cfg.Dependencies)
            {
                yield return item;
            }
        }
    }

    public async Task InstallPackageAsync(string name, CrossLangVersion version)
    {
        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(await File.ReadAllTextAsync(Path)) ?? new CrossLangConfig();
        cfg.Dependencies ??= new List<CrossLangDependency>();
        bool has = false;
        foreach (var item in cfg.Dependencies)
        {
            if (item.Name == name)
            {
                has = true;
                if(version.CompareTo(item.Version) > 0)
                    item.Version = version;
                break;
            }
        }
        if (!has) cfg.Dependencies.Add(new CrossLangDependency { Name = name, Version = version });
        await File.WriteAllTextAsync(Path, JsonConvert.SerializeObject(cfg, Formatting.Indented, new JsonSerializerSettings(){NullValueHandling= NullValueHandling.Ignore}));

    }



    public void UninstallPackage(string name)
    {
        var cfg = JsonConvert.DeserializeObject<CrossLangConfig>(File.ReadAllText(Path)) ?? new CrossLangConfig();
        cfg.Dependencies ??= new List<CrossLangDependency>();

        foreach (var item in cfg.Dependencies)
        {
            if (item.Name == name)
            {
                cfg.Dependencies.Remove(item);

                break;
            }
        }
        File.WriteAllText(Path, JsonConvert.SerializeObject(cfg, Formatting.Indented,new JsonSerializerSettings(){NullValueHandling= NullValueHandling.Ignore}));
    }
}