package tars.logic.commands;

import tars.commons.core.Messages;
import tars.commons.exceptions.DuplicateTaskException;
import tars.commons.exceptions.IllegalValueException;
import tars.model.task.*;
import tars.model.task.UniqueTaskList.TaskNotFoundException;
import tars.model.tag.Tag;
import tars.model.tag.UniqueTagList;

import java.time.DateTimeException;
import java.util.HashSet;
import java.util.Set;

/**
 * Adds a task to tars.
 * 
 * @@author A0139924W
 */
public class AddCommand extends UndoableCommand {

	public static final String COMMAND_WORD = "add";

    public static final String MESSAGE_USAGE = COMMAND_WORD + ": Adds a task to tars. "
            + "Parameters: NAME [-dt DATETIME] [-p PRIORITY] [-t TAG]...\n"
            + "Example: " + COMMAND_WORD
            + " cs2103 project meeting -dt 05/09/2016 1400 to 06/09/2016 2200 -p h -t project";

    public static final String MESSAGE_SUCCESS = "New task added: %1$s";
    public static final String MESSAGE_UNDO = "Removed %1$s";
    public static final String MESSAGE_REDO = "Added %1$s";

    private final Task toAdd;
    
    /**
     * Convenience constructor using raw values.
     *
     * @throws IllegalValueException if any of the raw values are invalid
     * @throws DateTimeException if given dateTime string is invalid.
     */
    public AddCommand(String name, String[] dateTime, String priority, Set<String> tags)
            throws IllegalValueException, DateTimeException {

        final Set<Tag> tagSet = new HashSet<>();
        for (String tagName : tags) {
            tagSet.add(new Tag(tagName));
        }
        
        this.toAdd = new Task(
                new Name(name),
                new DateTime(dateTime[0], dateTime[1]),
                new Priority(priority),
                new Status(),
                new UniqueTagList(tagSet)
        );

    }

    @Override
    public CommandResult execute() {
        assert model != null;
        try {
            model.addTask(toAdd);
            model.getUndoableCmdHist().push(this);
            return new CommandResult(String.format(MESSAGE_SUCCESS, toAdd));
        } catch (DuplicateTaskException e) {
            return new CommandResult(Messages.MESSAGE_DUPLICATE_TASK);
        }

    }
    
    @Override
    public CommandResult undo() {
        assert model != null;
        try {
            model.deleteTask(toAdd);
            return new CommandResult(
                    String.format(UndoCommand.MESSAGE_SUCCESS, String.format(MESSAGE_UNDO, toAdd)));
        } catch (TaskNotFoundException e) {
            return new CommandResult(String.format(UndoCommand.MESSAGE_UNSUCCESS,
                    Messages.MESSAGE_TASK_CANNOT_BE_FOUND));
        }
    }
    
    @Override
    public CommandResult redo() {
        assert model != null;
        try {
            model.addTask(toAdd);
            return new CommandResult(
                    String.format(RedoCommand.MESSAGE_SUCCESS, String.format(MESSAGE_REDO, toAdd)));
        } catch (DuplicateTaskException e) {
            return new CommandResult(
                    String.format(RedoCommand.MESSAGE_UNSUCCESS, Messages.MESSAGE_DUPLICATE_TASK));
        }
    }

}

@@ -48,24 +48,109 @@
 ns.core.
-Messages
+EventsCenter;%0Aimport tars.commons.core.Messages;%0Aimport tars.commons.events.ui.TaskAddedEvent
 ;%0Aimport
@@ -602,9 +602,12 @@
  %7B%0A%0A
-%09
+    
 publ
@@ -1180,21 +1180,17 @@
  toAdd;%0A
-    
 %0A
+
     /**%0A
@@ -1692,17 +1692,9 @@
   %7D%0A
-        
 %0A
+
     
@@ -1920,16 +1920,24 @@
 tagSet)%0A
+        
         
@@ -1939,16 +1939,16 @@
      );%0A
-
 %0A    %7D%0A%0A
@@ -2127,16 +2127,119 @@
 (this);%0A
+            EventsCenter.getInstance().post(new TaskAddedEvent(model.getFilteredTaskList().size()+1));%0A
         
@@ -2436,29 +2436,25 @@
    %7D%0A%0A    %7D%0A
-    
 %0A
+
     @Overrid
@@ -2912,20 +2912,16 @@
 %7D%0A    %7D%0A
-    
 %0A    @Ov

Add line to post task added event Remove unused import Fix indentation