using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

namespace Umbraco.Core
{
    internal static class AssemblyExtensions
    {
        /// <summary>
        /// Returns the file used to load the assembly
        /// </summary>
        /// <param name="assembly"></param>
        /// <returns></returns>
        public static FileInfo GetAssemblyFile(this Assembly assembly)
        {
            var codeBase = assembly.CodeBase;
            var uri = new Uri(codeBase);
            var path = uri.LocalPath;
            return new FileInfo(path);
        }

        /// <summary>
        /// Returns true if the assembly is the App_Code assembly
        /// </summary>
        /// <param name="assembly"></param>
        /// <returns></returns>
        public static bool IsAppCodeAssembly(this Assembly assembly)
        {
            if (assembly.FullName.StartsWith("App_Code"))
            {
                try
                {
                    Assembly.Load("App_Code");
                    return true;
                }
                catch (FileNotFoundException)
                {
                    //this will occur if it cannot load the assembly
                    return false;
                }
            }
            return false;
        }

        /// <summary>
        /// Returns true if the assembly is the compiled global asax.
        /// </summary>
        /// <param name="assembly"></param>
        /// <returns></returns>
        public static bool IsGlobalAsaxAssembly(this Assembly assembly)
        {
            //only way I can figure out how to test is by the name
            return assembly.FullName.StartsWith("App_global.asax");
        }

        /// <summary>
        ///  Returns the file used to load the assembly
        /// </summary>
        /// <param name="assemblyName"></param>
        /// <returns></returns>
        public static FileInfo GetAssemblyFile(this AssemblyName assemblyName)
        {
            var codeBase = assemblyName.CodeBase;
            var uri = new Uri(codeBase);
            var path = uri.LocalPath;
            return new FileInfo(path);
        }

    }
}