package no.eliashaugsbakk.kompilator;

import java.util.Arrays;
import java.util.List;
import no.eliashaugsbakk.kompilator.IO.File;
import no.eliashaugsbakk.kompilator.IO.FileReaderWriter;
import no.eliashaugsbakk.kompilator.IO.FileReaderWriterException;
import no.eliashaugsbakk.kompilator.IRGeneration.IRGenerator;
import no.eliashaugsbakk.kompilator.IRGeneration.Instructions.Instruction;
import no.eliashaugsbakk.kompilator.asmGeneration.AssemblyBuilder;
import no.eliashaugsbakk.kompilator.assembleAndLink.AssemblerAndLinker;
import no.eliashaugsbakk.kompilator.parsing.AST;
import no.eliashaugsbakk.kompilator.parsing.Parser;
import no.eliashaugsbakk.kompilator.parsing.ParserException;
import no.eliashaugsbakk.kompilator.semanticAnalysis.Analyzer;
import no.eliashaugsbakk.kompilator.semanticAnalysis.SemanticException;
import no.eliashaugsbakk.kompilator.tokenization.Lexer;
import no.eliashaugsbakk.kompilator.tokenization.Token;

public class Main {
  public static boolean VERBOSE = false;
  static final String programFileExtension = "spå";


  static void main(String[] args) {
    if (args.length == 0) {
      IO.println("feil: Filsti må angis.");
      System.exit(1);
    }

    VERBOSE = Arrays.asList(args).contains("--verbose")
        || Arrays.asList(args).contains("-v");

    String inputFileName = args[0];

    if (!inputFileName.endsWith("." + programFileExtension)) {
      IO.println("feil: Inndatafilen må ha filendelsen: " + programFileExtension);
      System.exit(1);
    }

    File inputProgram = null;
    FileReaderWriter fileReaderWriter = new FileReaderWriter();
    try {
      inputProgram = fileReaderWriter.readFile(inputFileName);
    } catch (FileReaderWriterException e) {
      IO.println("feil: Kunne ikke lese inndatafilen: " + inputFileName + "\n\n" + e.getMessage());
      System.exit(1);
    }

    List<Token> tokens = new Lexer(inputProgram.fileBody()).tokenize();
    AST ast = null;
    try {
      ast = new Parser(tokens).parse();
    } catch (ParserException e) {
      IO.println(e.getMessage());
      System.exit(1);
    }

    try {
      new Analyzer(ast).analyze();
    } catch (SemanticException e) {
      IO.println(e.getMessage());
      System.exit(1);
    }

    List<Instruction> IR = new IRGenerator(ast).generate();

    String assembly = new AssemblyBuilder().createAssembly(IR);

    new AssemblerAndLinker().assembleAndLink(inputProgram.fileName(), assembly);

    System.exit(0);
  }
}