// Copyright (c) 2021, Fr.Terrot. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file. 

package io.gitea.model;

public enum IssueAction {
	CLOSE("close"),
	LEAVE("leave"),
	REOPEN("reopen");

	IssueAction(String label) {
		this.label = label;
	}
	public final String label;
	
	public static IssueAction getEnum(String other) {
		if ((other == null)||(other.isBlank()) || (other.isEmpty()))
			return LEAVE;
		for (IssueAction a : IssueAction.values()) 
			if (a.equals(other)) return a;
		throw new IllegalArgumentException(other + " is not a IssueAction value");
	}
	/**Compute targeted state when apply action as transition to a state.
	 * 
	 * [from State: OPENED] --> Action: CLOSE --> [to State:CLOSED]
	 * [from State: CLOSED] --> Action: REOPEN --> [to State: OPENDED]
	 * All other cases have no impact on State.
	 * 
	 * @param fromState  
	 * @return Targeted state as IssueState.
	 */
	public IssueState toState(IssueState fromState) {
		if ((this == CLOSE) && (fromState == IssueState.STATE_OPENED)) return IssueState.STATE_CLOSED;
		if ((this == REOPEN) && (fromState == IssueState.STATE_CLOSED)) return IssueState.STATE_OPENED;
		return fromState;
	}
	static public IssueState toState(IssueState from, IssueAction onAction) {
		return onAction.toState(from);
	}
	public boolean equals(IssueAction arg0) {
		return this.label.equals(arg0.toString());
	}
	public boolean equals(String arg0) {
		return this.label.equals(arg0);
	}

}