package main;

import static java.text.MessageFormat.format;
import static main.LispMain.*;
import static org.junit.Assert.assertEquals;

import java.io.*;

import org.junit.*;
import org.junit.contrib.java.lang.system.*;

import com.googlecode.lanterna.terminal.virtual.*;

import environment.RuntimeEnvironment;
import interpreter.LispInterpreterBuilderImpl;
import terminal.*;

public class MainTest {

    LispMain main;
    PipedOutputStream inputWriter;
    PipedInputStream outputReader;
    VirtualTerminal terminal;
    RuntimeEnvironment environment;

    public MainTest() {
        this.environment = RuntimeEnvironment.getInstance();
    }

    @Rule
    public ExpectedSystemExit exit = ExpectedSystemExit.none();

    @Rule
    public SystemErrRule systemErrRule = new SystemErrRule().enableLog().mute();

    @Rule
    public SystemOutRule systemOutRule = new SystemOutRule().enableLog().mute();

    @Before
    public void setUp() throws Exception {
        environment.reset();
        TerminalConfiguration configuration = new TerminalConfiguration();
        inputWriter = new PipedOutputStream();
        outputReader = new PipedInputStream();
        terminal = new DefaultVirtualTerminal();
        configuration.setInputWriter(inputWriter);
        configuration.setOutputReader(outputReader);
        configuration.setTerminal(terminal);
        main = new LispMain(new LispInterpreterBuilderImpl() {}, configuration);
    }

    @After
    public void tearDown() throws Exception {
        terminal.close();
        environment.reset();
    }

    @Test
    public void runWithBadFile() {
        String expectedMessage = "[critical] test/main/test-files/bad.lisp (No such file or directory)";

        exit.expectSystemExitWithStatus(1);
        exit.checkAssertionAfterwards(() -> {
            assertEquals(format("{0}{1}{2}\n", ANSI_PURPLE, expectedMessage, ANSI_RESET),
                         systemErrRule.getLogWithNormalizedLineSeparator());
            assertEquals("", systemOutRule.getLogWithNormalizedLineSeparator());

        });

        main.runWithFile("test/main/test-files/bad.lisp");

    }

    @Test
    public void runWithFile_PrintsDecoratedLastValueOnly() {
        main.runWithFile("test/main/test-files/file.lisp");
        assertEquals("", systemErrRule.getLogWithNormalizedLineSeparator());
        assertEquals(format("{0}{1}{2}\n\n", ANSI_GREEN, "RADISH", ANSI_RESET),
                     systemOutRule.getLogWithNormalizedLineSeparator());
    }

    @Test
    public void runInteractive() {
        VirtualTerminalInteractor t = new VirtualTerminalInteractor();
        try {
            t.start();
        } finally {
            t.stop();
        }
    }

}