using BSF.BaseService.NScript.Compiler;
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;

namespace BSF.BaseService.NScript.Core
{
 public class DynamicCompilerProvider
 {

 public Assembly Compiler(CompilerInfo compilerInfo)
 {
 
 Assembly objAssembly = null;

 // 1.CodeDomProvider
 CodeDomProvider objICodeCompiler = CodeDomProvider.CreateProvider(compilerInfo.EnumCompilerLanguage.ToString());

 // 2.CompilerParameters
 CompilerParameters objCompilerParameters = new CompilerParameters();
 objCompilerParameters.ReferencedAssemblies.AddRange(Config.SystemReferencedAssembliesDlls.ToArray());
 foreach (var r in compilerInfo.DllFiles)
 {
 if (!objCompilerParameters.ReferencedAssemblies.Contains(r.FullFileName))
 objCompilerParameters.ReferencedAssemblies.Add(r.FullFileName);
 }
 
 objCompilerParameters.GenerateExecutable = false;
 objCompilerParameters.GenerateInMemory = true;

 if (compilerInfo.EnumCompilerMode == EnumCompilerMode.Main)
 {
 objCompilerParameters.GenerateExecutable = true;
 objCompilerParameters.GenerateInMemory = false;
 }

 //objCompilerParameters.GenerateInMemory = false;
 //objCompilerParameters.CompilerOptions = "/target:library /optimize";
 //objCompilerParameters.OutputAssembly = @"C:\Users\cjy\Desktop\test\" + DateTime.Now.ToString("yymmddHHmmss") + ".dll";
 

 // 3.CompilerResults
 CompilerResults cr = null;
 List<string> codes = new List<string>();
 //文件编译
 if (compilerInfo.EnumSourceType== EnumSourceType.File)
 {
 codes.Add(compilerInfo.MainFilePath.FullFileName);
 foreach (var file in compilerInfo.CodeFilePaths)
 {
 codes.Add(file.FullFileName);
 }
 cr = objICodeCompiler.CompileAssemblyFromFile(objCompilerParameters, codes.ToArray());
 }
 //内容编译
 else if (compilerInfo.EnumSourceType == EnumSourceType.Code)
 {
 codes.Add(compilerInfo.MainFileContent);
 foreach (var file in compilerInfo.CodeFilePaths)
 {
 codes.Add(System.IO.File.ReadAllText(file.FullFileName));
 }
 cr = objICodeCompiler.CompileAssemblyFromSource(objCompilerParameters, codes.ToArray());
 }
 

 if (cr.Errors.HasErrors)
 {
 string errors = "";
 foreach (CompilerError err in cr.Errors)
 {
 errors += string.Format("错误:{0},行号:{1},列号:{2},文件名:{3}\n", err.ErrorText, err.Line,err.Column, err.FileName);
 }
 if (!string.IsNullOrWhiteSpace(errors))
 {
 throw new NScriptException("编译错误信息:" + errors);
 }
 }
 else
 {
 objAssembly = cr.CompiledAssembly;
 LoadReferencedAssembliesFile(compilerInfo);
 }
 return objAssembly;

 }



 public void LoadReferencedAssembliesFile(CompilerInfo compilerInfo)
 {
 string systemdir = System.IO.Path.GetDirectoryName(typeof(string).Assembly.Location).TrimEnd(Path.DirectorySeparatorChar) + Path.DirectorySeparatorChar;
 foreach (var dll in compilerInfo.DllFiles)
 {
 string filepath = "";
 //默认系统自带文件
 if (System.IO.File.Exists(systemdir + dll.FileName))
 {
 filepath = systemdir + dll.FileName;
 continue;
 }
 //默认系统编译文件
 if (Config.SystemReferencedAssembliesDlls.Contains(dll.FileName))
 {
 continue;
 }
 
 //加载程序集文件
 if (System.IO.File.Exists(dll.FullFileName))
 {
 filepath = dll.FullFileName;

 var find = (from o in AppDomain.CurrentDomain.GetAssemblies() where o.GetName().Name.ToLower() == System.IO.Path.GetFileNameWithoutExtension(dll.FileName.ToLower()) select o).FirstOrDefault();
 if (find == null)
 {
 try
 {
 Assembly.LoadFrom(filepath);
 }
 catch (Exception exp)
 {
 throw new NScriptException("Assembly.LoadFrom" + dll.FileName + "出错");
 }
 }
 
 }

 
 
 }
 }
 }
}