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

namespace Azerion.BlueStack.Editor.iOS
{
    public class IOSDependencyParser : IDependencyParser
    {
        List<Dependency> IDependencyParser.ParseDependencies(string xmlFilePath)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlFilePath);
            string xmlPathPattern = "//dependencies/iosPods";
            XmlNodeList nodeList = xmlDoc.SelectNodes(xmlPathPattern);
            List<Dependency> dependencies = new List<Dependency>();
            if (nodeList != null)
            {
                foreach (XmlNode node in nodeList)
                {
                    XmlNode iosPod = node.FirstChild;
                    if (iosPod.Attributes == null)
                        continue;
                    var nameAttribute = iosPod.Attributes["name"];
                    var versionAttribute = iosPod.Attributes["version"];
                    if (nameAttribute == null || versionAttribute == null)
                        continue;
                    var name = nameAttribute.Value;
                    var version = versionAttribute.Value;
                    dependencies.Add(new Dependency(name, version));
                }
            }

            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>();
            }
            
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlFilePath);
            string xmlPathPattern = "//dependencies/iosPods/iosPod";
            XmlNodeList podNodes = xmlDoc.SelectNodes(xmlPathPattern);

            List<BlueStackDependency> dependencies = new List<BlueStackDependency>();
            if (podNodes != null && podNodes.Count > 0)
            {
                foreach (XmlNode pod in podNodes)
                {
                    if (pod.Attributes == null)
                        continue;
                    var aliasAttribute = pod.Attributes["alias"];
                    var nameAttribute = pod.Attributes["name"];
                    var versionAttribute = pod.Attributes["version"];
                    var alias =
                        aliasAttribute != null ? aliasAttribute.Value : nameAttribute?.Value;
                    var name = nameAttribute?.Value;
                    var version = versionAttribute?.Value;
                    if (name == null)
                        continue;
                    bool active = activeNames != null && activeNames.Contains(name);
                    dependencies.Add(new BlueStackDependency(alias, name, version, pod, active));
                }
            }

            return dependencies;
        }
    }
}