using System.Collections.Generic;
using System.IO;
using System.Xml;
using UnityEngine;

namespace Azerion.BlueStack.Editor.Android
{
    public class AndroidDependencyParser : IDependencyParser
    {
        List<Dependency> IDependencyParser.ParseDependencies(string xmlFilePath)
        {
            var xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlFilePath);
            const string xmlPathPattern = "//dependencies/androidPackages";
            var androidPackagesNode = xmlDoc.SelectSingleNode(xmlPathPattern);
            var dependencies = new List<Dependency>();
            if (androidPackagesNode == null)
                return dependencies;
            foreach (XmlNode androidPackageNode in androidPackagesNode.ChildNodes)
            {
                var specAttribute = androidPackageNode.Attributes?["spec"];
                if (specAttribute == null)
                    continue;
                dependencies.Add(new AndroidDependency(specAttribute.Value, "", ""));
            }
            return dependencies;
        }

        List<BlueStackDependency> IDependencyParser.ParseBlueStackDependencies(
            string xmlFilePath,
            HashSet<string> activeNames
        )
        {
            if (!File.Exists(xmlFilePath))
            {
                Debug.LogError("Dependencies file not found at: " + xmlFilePath);
                return new List<BlueStackDependency>();
            }
            
            var xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlFilePath);
            const string xmlPathPattern = "//dependencies/androidPackages";
            var androidPackagesNode = xmlDoc.SelectSingleNode(xmlPathPattern);
            var dependencies = new List<BlueStackDependency>();
            if (androidPackagesNode == null)
                return dependencies;
            foreach (XmlNode androidPackageNode in androidPackagesNode.ChildNodes)
            {
                var aliasAttribute = androidPackageNode.Attributes?["alias"];
                var specAttribute = androidPackageNode.Attributes?["spec"];
                var versionAttribute = androidPackageNode.Attributes?["version"];
                var alias = aliasAttribute != null ? aliasAttribute.Value : specAttribute?.Value;
                var name = specAttribute?.Value;
                var version = versionAttribute?.Value;
                if (name == null)
                    continue;
                bool active = activeNames != null && activeNames.Contains(name);
                dependencies.Add(
                    new BlueStackDependency(alias, name, version, androidPackageNode, active)
                );
            }
            return dependencies;
        }
    }
}