package com.termux.shared.shell;

import com.termux.terminal.TerminalBuffer;
import com.termux.terminal.TerminalEmulator;
import com.termux.terminal.TerminalSession;

import java.lang.reflect.Field;

public class ShellUtils {

    public static int getPid(Process p) {
        try {
            Field f = p.getClass().getDeclaredField("pid");
            f.setAccessible(true);
            try {
                return f.getInt(p);
            } finally {
                f.setAccessible(false);
            }
        } catch (Throwable e) {
            return -1;
        }
    }

    public static String getExecutableBasename(String executable) {
        if (executable == null) return null;
        int lastSlash = executable.lastIndexOf('/');
        return (lastSlash == -1) ? executable : executable.substring(lastSlash + 1);
    }

    public static String getTerminalSessionTranscriptText(TerminalSession terminalSession, boolean linesJoined, boolean trim) {
        if (terminalSession == null) return null;

        TerminalEmulator terminalEmulator = terminalSession.getEmulator();
        if (terminalEmulator == null) return null;

        TerminalBuffer terminalBuffer = terminalEmulator.getScreen();
        if (terminalBuffer == null) return null;

        String transcriptText;

        if (linesJoined)
            transcriptText = terminalBuffer.getTranscriptTextWithFullLinesJoined();
        else
            transcriptText = terminalBuffer.getTranscriptTextWithoutJoinedLines();

        if (transcriptText == null) return null;

        if (trim)
            transcriptText = transcriptText.trim();

        return transcriptText;
    }

}