package assembler;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;

public class Pass1 {
    private int cursor;
    private static ArrayList<String> labels = new ArrayList<>();
    private static ArrayList<String> operationCodes = new ArrayList<>();
    private static ArrayList<String> operands = new ArrayList<>();
    private static ArrayList<String> Addresses = new ArrayList<>();
    private static final String FILENAME = "C:\\Users\\karem\\Downloads\\SIC-Example.txt";

    private void readfile() {
        BufferedReader br = null;
        FileReader fr = null;
        try {
            fr = new FileReader(FILENAME);
            br = new BufferedReader(fr);
            String CurrentLine;
            while ((CurrentLine = br.readLine()) != null) {
                // call for a function that uses the line
                this.line(CurrentLine);
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null)
                    br.close();
                if (fr != null)
                    fr.close();
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

    private void line(String line) {
        // check if comment
        char firstChar = line.charAt(0);
        if (firstChar == '.') {
            System.out.println("hello from the other side");
        } else {
            // checking format
            line = this.checkFormat(line);
            // get Label From Line
            // if no Label in the line get Label will return null
            String label = getLabel(line);
            if (label != null) {
                label = label.toUpperCase();
            }
            labels.add(label);
            System.out.print(label);
            // get OperationCode From Line
            String operationCode = getOperationCode(line).toUpperCase();
            operationCodes.add(operationCode);
            System.out.print("\t" + operationCode);
            // get Operand From Line
            // if no operand in the line get operand will return null
            String operand = getOperand(line);
            if (operand != null)
                operand = operand.toUpperCase();
            operands.add(operand);
            System.out.print("\t" + operand);
        }
        System.out.println();
    }

    private String checkFormat(String line) {
        if (line.charAt(0) == '\t') {
            line = line.replaceFirst("\t", "    ");
        }
        if (line.length() > 1 && line.charAt(1) == '\t') {
            line = line.replaceFirst("\t", "   ");
        }
        if (line.length() > 2 && line.charAt(2) == '\t') {
            line = line.replaceFirst("\t", "  ");
        }
        if (line.length() > 4 && line.charAt(4) == '\t') {
            line = line.replaceFirst("\t", "    ");
        }
        if (line.length() > 5 && line.charAt(5) == '\t') {
            line = line.replaceFirst("\t", "   ");
        }
        if (line.length() > 6 && line.charAt(6) == '\t') {
            line = line.replaceFirst("\t", "  ");
        }
        if (line.length() > 10 && line.charAt(10) == '\t') {
            line = line.replaceFirst("\t", "  ");
        }
        if (line.length() > 12 && line.charAt(12) == '\t') {
            line = line.replaceFirst("\t", "    ");
        }
        if (line.length() > 13 && line.charAt(13) == '\t') {
            line = line.replaceFirst("\t", "   ");
        }
        if (line.length() > 14 && line.charAt(14) == '\t') {
            line = line.replaceFirst("\t", "  ");
        }
        if (line.charAt(8) != ' ') {
            System.out.println("Error in Format");
        }
        if (line.length() > 15 && line.charAt(15) != ' ') {
            System.out.println("Error in Format");
        }
        if (line.length() > 16 && line.charAt(16) != ' ') {
            System.out.println("Error in Format");
        }
        return line;
    }

    private String getLabel(String line) {
        boolean flag = false;
        int i = 0;
        char firstChar = line.charAt(0);
        if (firstChar == ' ' || firstChar == '\t') {
            flag = true;
        }
        if (!flag) {
            while (i < 8) {
                if (line.length() > i && line.charAt(i) != ' ' && line.charAt(i) != '\t') {
                } else {
                    break;
                }
                i++;
            }
            String label = line.substring(0, i);
            return label;
        } else
            return null;
    }

    private String getOperationCode(String line) {
        int i = 9;
        while (i < 15) {
            if (line.length() > i && line.charAt(i) != ' ' && line.charAt(i) != '\t') {
            } else {
                break;
            }
            i++;
        }
        String opertionCode = line.substring(9, i);
        return opertionCode;
    }

    private String getOperand(String line) {
        boolean flag = false;
        int i = 17;
        while (i < 35) {
            if (line.length() > i && line.charAt(i) != ' ' && line.charAt(i) != '\t') {
                flag = true;
            } else {
                break;
            }
            i++;
        }
        if (flag) {
            String operand = line.substring(17, i);
            return operand;
        } else
            return null;
    }

    public static void main(String[] args) {
        Pass1 k = new Pass1();
        k.readfile();
        Pass2 g = new Pass2(labels, operationCodes, operands, Addresses);

    }
}