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/**
 * The MIT License
 *
 * Copyright (c) 2009-2019 PrimeTek
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.primefaces.component.terminal;

import java.util.ArrayDeque;
import java.util.Arrays;

import javax.faces.application.ResourceDependencies;
import javax.faces.application.ResourceDependency;
import javax.faces.context.FacesContext;

import org.primefaces.model.terminal.TerminalAutoCompleteMatches;
import org.primefaces.model.terminal.TerminalAutoCompleteModel;
import org.primefaces.model.terminal.TerminalCommand;

@ResourceDependencies({
        @ResourceDependency(library = "primefaces", name = "terminal/terminal.css"),
        @ResourceDependency(library = "primefaces", name = "components.css"),
        @ResourceDependency(library = "primefaces", name = "jquery/jquery.js"),
        @ResourceDependency(library = "primefaces", name = "jquery/jquery-plugins.js"),
        @ResourceDependency(library = "primefaces", name = "core.js"),
        @ResourceDependency(library = "primefaces", name = "components.js"),
        @ResourceDependency(library = "primefaces", name = "terminal/terminal.js")
})
public class Terminal extends TerminalBase {

    public static final String COMPONENT_TYPE = "org.primefaces.component.Terminal";

    public static final String CONTAINER_CLASS = "ui-terminal ui-widget ui-widget-content ui-corner-all";
    public static final String WELCOME_MESSAGE_CLASS = "ui-terminal-welcome";
    public static final String CONTENT_CLASS = "ui-terminal-content";
    public static final String PROMPT_CLASS = "ui-terminal-prompt";
    public static final String INPUT_CLASS = "ui-terminal-input";

    public boolean isCommandRequest() {
        FacesContext context = getFacesContext();
        return context.getExternalContext().getRequestParameterMap().containsKey(getClientId(context) + "_command");
    }

    public boolean isAutoCompleteRequest() {
        FacesContext context = getFacesContext();
        return context.getExternalContext().getRequestParameterMap().containsKey(getClientId(context) + "_autocomplete");
    }

    TerminalAutoCompleteMatches traverseAutoCompleteModel(TerminalAutoCompleteModel commandModel, String input, String[] args) {
        ArrayDeque argumentQueue = new ArrayDeque(Arrays.asList(args));
        return traverseAutoCompleteModel(commandModel, input, argumentQueue);
    }

    private TerminalAutoCompleteMatches traverseAutoCompleteModel(TerminalAutoCompleteModel commandModel, String input, ArrayDeque inputArguments) {
        TerminalAutoCompleteMatches matches = new TerminalAutoCompleteMatches();

        for (TerminalCommand command : commandModel.getCommands()) {
            if (isPartialMatch(command, input)) {
                if (isExactMatch(command, input) && command.hasArguments()) {
                    matches.extendBaseCommand(input);
                    return traverseArguments(command, matches, inputArguments);
                }

                matches.addMatch(command);
            }
        }

        return matches;
    }

    private TerminalAutoCompleteMatches traverseArguments(TerminalCommand command, TerminalAutoCompleteMatches matches, ArrayDeque inputArguments) {
        if (command.getArguments() != null) {
            for (TerminalCommand argument : command.getArguments()) {
                if (!inputArguments.isEmpty()) {
                    String inputArgument = inputArguments.peek();

                    if (isPartialMatch(argument, inputArgument)) {
                        if (isExactMatch(argument, inputArgument) && argument.hasArguments()) {
                            matches.extendBaseCommand(argument);
                            inputArguments.removeFirst();
                            return traverseArguments(argument, matches, inputArguments);
                        }

                        matches.addMatch(argument);
                    }
                }
                else {
                    matches.addMatch(argument);
                }
            }
        }

        return matches;
    }

    private boolean isPartialMatch(TerminalCommand command, String input) {
        return command.getText().startsWith(input);
    }

    private boolean isExactMatch(TerminalCommand command, String input) {
        return command.getText().equalsIgnoreCase(input);
    }
}