import static org.junit.jupiter.api.Assertions.*;

import java.awt.AWTException;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import org.junit.jupiter.api.Test;

class InventoryTest {

	Inventory inventory;
	
	public void initialize() throws AWTException, IOException {
		inventory = new Inventory();
	}
	
	@Test
	public void testGetNameInItemInventorySlot() throws IOException, AWTException {
		initialize();
		// TODO: Coal is recognized as ironOre
		String[][] expectedItemNames0 = {{"willowLogs", "oakLogs", "oakLogs", "willowLogs", "willowLogs", "willowLogs", "willowLogs"},
				{"empty", "empty", "empty", "willowLogs", "willowLogs", "willowLogs", "willowLogs"}, 
				{"empty", "willowLogs", "logs", "logs", "empty", "willowLogs", "willowLogs"},
				{"willowLogs", "willowLogs", "willowLogs", "willowLogs", "willowLogs", "willowLogs", "empty"}};
		String[][] expectedItemNames1 = {{"oakLogs", "oakLogs", "willowLogs", "willowLogs", "willowLogs", "oakLogs", "logs"},
				{"empty", "willowLogs", "empty", "willowLogs", "logs", "empty", "logs"}, 
				{"oakLogs", "willowLogs", "oakLogs", "oakLogs", "runeAxe", "willowLogs", "willowLogs"},
				{"willowLogs", "logs", "logs", "oakLogs", "willowLogs", "logs", "empty"}};
		String[][] expectedItemNames2 = {{"oakLogs", "willowLogs", "willowLogs", "willowLogs", "oakLogs", "willowLogs", "logs"},
				{"empty", "oakLogs", "empty", "logs", "willowLogs", "empty", "willowLogs"}, 
				{"logs", "empty", "oakLogs", "oakLogs", "empty", "oakLogs", "empty"},
				{"willowLogs", "empty", "logs", "willowLogs", "empty", "logs", "logs"}};
		String[][] expectedItemNames3 = {{"ironOre", "empty", "ironOre", "empty", "ironOre", "empty", "ironOre"},
				{"empty", "ironOre", "empty", "ironOre", "ironOre", "ironOre", "ironOre"}, 
				{"ironOre", "empty", "ironOre", "empty", "empty", "ironOre", "empty"},
				{"empty", "ironOre", "empty", "ironOre", "ironOre", "empty", "empty"}};
		String[][] expectedItemNames4 = {{"ironOre", "empty", "empty", "ironOre", "ironOre", "empty", "empty"},
				{"empty", "ironOre", "empty", "empty", "ironOre", "ironOre", "empty"}, 
				{"empty", "ironOre", "ironOre", "ironOre", "empty", "ironOre", "ironOre"},
				{"empty", "ironOre", "empty", "ironOre", "ironOre", "empty", "ironOre"}};
		String[][] expectedItemNames5 = {{"ironOre", "empty", "ironOre", "ironOre", "empty", "empty", "ironOre"},
				{"empty", "ironOre", "empty", "empty", "ironOre", "ironOre", "empty"}, 
				{"empty", "empty", "ironOre", "ironOre", "empty", "ironOre", "ironOre"},
				{"ironOre", "ironOre", "ironOre", "empty", "ironOre", "empty", "empty"}};
		testGetNameInItemInventorySlotHelper("inventory_0.png", expectedItemNames0);
		testGetNameInItemInventorySlotHelper("inventory_1.png", expectedItemNames1);
		testGetNameInItemInventorySlotHelper("inventory_2.png", expectedItemNames2);
		testGetNameInItemInventorySlotHelper("inventory_3.png", expectedItemNames3);
		testGetNameInItemInventorySlotHelper("inventory_4.png", expectedItemNames4);
		testGetNameInItemInventorySlotHelper("inventory_5.png", expectedItemNames5);
	}
	
	@Test
	public void testInventoryFull() throws AWTException, IOException {
		initialize();
		
		testInventoryFullHelper("inventory_full_0.png", true);
		testInventoryFullHelper("inventory_full_1.png", true);
		testInventoryFullHelper("inventory_full_2.png", true);
		testInventoryFullHelper("inventory_full_3.png", true);
		testInventoryFullHelper("inventory_full_4.png", true);
		testInventoryFullHelper("inventory_not_full_0.png", false);
		testInventoryFullHelper("inventory_not_full_1.png", false);
		testInventoryFullHelper("inventory_not_full_2.png", false);
	}
	
	public void testInventoryFullHelper(String inventoryFileName, boolean expectedResult) throws IOException {
		loadTestingImageToInventory(inventoryFileName);
		assertEquals(inventory.isInventoryFull(), expectedResult);
	}
	
	public void testGetNameInItemInventorySlotHelper(String inventoryFileName, String[][] expectedItemNames) throws IOException {
		loadTestingImageToInventory(inventoryFileName);
		
		for (int row = 0; row < Constants.INVENTORY_NUM_ROWS; row++) {
			for (int column = 0; column < Constants.INVENTORY_NUM_COLUMNS; column++) {
				assertEquals(inventory.getItemNameInInventorySlot(row, column), expectedItemNames[row][column]);
			}
		}
	}
	
	public BufferedImage loadBufferedImage(String fileName) throws IOException {
		File itemFile = new File(Paths.INVENTORY_TEST_DIRECTORY_PATH + fileName);
		BufferedImage itemImage = ImageIO.read(itemFile);
		return itemImage;
	}
	
	public void loadTestingImageToInventory(String inventoryFileName) throws IOException {
		BufferedImage testImage = loadBufferedImage(inventoryFileName);
		inventory.updateWithFakeImageForTests(testImage);
	}	
}