package bjc.everge;

import bjc.everge.ControlledString.Control;
import bjc.everge.ControlledString.ParseStrings;

import java.io.FileInputStream;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import static org.junit.Assert.*;

/**
 * Utility methods for testing.
 *
 * @author Ben Culkin
 */
@SuppressWarnings("javadoc")
public class TestUtils {
	public static void assertThrownMessage(String msg, String fle) {
		assertThrownMessage(false, msg, fle);
	}

	public static void assertThrownMessage(boolean logMsg, String msg, String fle) {
		try (FileInputStream fis = new FileInputStream(fle);
				Scanner scn = new Scanner(fis)) {
			ReplPair.readList(new ArrayList<>(), scn);

			assertTrue(false);
		} catch (BadReplParse rpex) {
			if (logMsg)
				System.err.println(rpex.toPrintString());

			assertEquals(msg, rpex.toPrintString());
		} catch (Exception ex) {
			System.err.println("EXCEPTION");
			ex.printStackTrace();

			assertTrue(false);

			return;
		}
	}

	public static void assertMultiReplace(String fle, String... inps) {
		assertMultiReplace(false, fle, inps);
	}

	public static void assertMultiReplace(boolean logRep, String fle, String... inps) {
		if (inps.length < 2) {
			throw new IllegalArgumentException(
					"ERROR: Must provide at least two strings to assertMultiReplace");
		}

		if (inps.length % 2 != 0) {
			throw new IllegalArgumentException(
					"ERROR: Odd number of strings passed to assertMultiReplace");
		}

		List<ReplPair> lrp = null;

		try (FileInputStream fis = new FileInputStream(fle);
				Scanner scn = new Scanner(fis)) {
			lrp = ReplPair.readList(scn);
		} catch (BadReplParse rpex) {
			System.err.println(rpex.toPrintString());

			assertTrue(false);
		} catch (Exception ex) {
			System.err.println("EXCEPTION");
			ex.printStackTrace();

			assertTrue(false);

			return;
		}

		for (int i = 0; i < inps.length; i += 2) {
			String right = inps[i];
			String inp = inps[i + 1];

			assertReplacesTo(logRep, right, lrp, inp);
		}
	}

	public static void assertReplacesFrom(String right, String inp, String fle) {
		assertMultiReplace(fle, right, inp);
	}

	public static void assertReplacesTo(String right, List<ReplPair> rps, String inp) {
		assertReplacesTo(false, right, rps, inp);
	}

	public static void assertReplacesTo(boolean logRep, String right, List<ReplPair> rps,
			String inp) {
		if (logRep) {
			System.err.printf("\t[LOG] Checking '%s' -> '%s'\n", inp, right);
		}

		String tmp = inp;

		for (ReplPair rp : rps) {
			String oldTmp = tmp;

			tmp = rp.apply(tmp);

			if (logRep) {
				System.err.printf("\t\t[LOG-STEP] '%s' -> '%s'\t%s\n", oldTmp, tmp, rp);
			}
		}

		assertEquals(right, tmp);
	}

	public static void assertSplitsTo(String inp, String esc, String splat,
			String... right) {
		assertSplitsTo(false, inp, esc, splat, right);
	}

	public static void assertSplitsTo(boolean doLog, String inp, String esc, String splat,
			String... right) {
		try {
			if (doLog)
				StringUtils.isDebug = true;

			String[] lst = StringUtils.escapeSplit(esc, splat, inp);

			if (doLog) {
				System.err.printf("[TRACE] Returned ");

				for (String str : lst) {
					System.err.printf("(%s) ", str);
				}

				System.err.println();
			}

			assertArrayEquals(right, lst);
		} catch (Exception ex) {
			System.err.println("EXCEPTION");
			ex.printStackTrace();
			System.err.println();

			assertTrue(false);
		} finally {
			if (doLog)
				StringUtils.isDebug = false;
		}
	}

	public static void assertIsControl(String inp, String strang, Control... args) {
		assertIsControl(false, inp, strang, args);
	}

	public static void assertIsControl(boolean doLog, String inp, String strang,
			Control... args) {
		ControlledString cs
				= ControlledString.parse(inp, new ParseStrings("//", ";", "/", "|"));

		if (doLog) {
			System.err.printf("[LOG] CS: %s\n", cs);
		}

		assertEquals(strang, cs.strang);

		assertEquals("array length mismatch:", args.length, cs.count());

		for (int i = 0; i < args.length; i++) {
			assertEquals("array value mismatch:", args[i], cs.controls[i]);
		}
	}
	
	public static void assertMatches(String pattern, String actual) {
		assertTrue(actual.matches(pattern));
	}
}