/*
 * Copyright (c) 2006-2011 DMDirc Developers
 *
 * 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 com.dmdirc.actions.wrappers;

import com.dmdirc.actions.Action;
import com.dmdirc.actions.ActionCondition;
import com.dmdirc.actions.CoreActionComparison;
import com.dmdirc.actions.CoreActionComponent;
import com.dmdirc.actions.CoreActionType;
import com.dmdirc.actions.interfaces.ActionType;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Actions alias wrapper.
 */
public final class Alias implements Serializable {

    /**
     * A version number for this class. It should be changed whenever the class
     * structure is changed (or anything else that would prevent serialized
     * objects being unserialized with the new class).
     */
    private static final long serialVersionUID = 1;

    /** Alias command. */
    private String command;

    /** Alias arguments. */
    private List<ActionCondition> arguments;

    /** Alias response. */
    private String[] response;

    /**
     * Creates a new Alias wrapper.
     *
     * @param command Alias command
     */
    public Alias(final String command) {
        this.command = command;
        this.arguments = new ArrayList<ActionCondition>();
        this.arguments.add(new ActionCondition(1, CoreActionComponent.STRING_STRING,
                CoreActionComparison.STRING_EQUALS, command));
        this.response = new String[]{"", };
    }

    /**
     * Wraps an existing Action in an Alias.
     *
     * @param command Alias command
     * @param arguments List of arguments for the alias
     * @param response Response for the alias
     */
    public Alias(final String command, final List<ActionCondition> arguments,
            final String[] response) {
        this.command = command;
        this.arguments = new ArrayList<ActionCondition>(arguments);
        this.response = response.clone();
    }

    /**
     * Returns the aliases command.
     *
     * @return Aliases command
     */
    public String getCommand() {
        return command;
    }

    /**
     * Sets the aliases command.
     *
     * @param command Command to give the alias
     */
    public void setCommand(final String command) {
        if (!this.command.equals(command)) {
            this.command = command;

            ActionCondition argument = arguments.get(0);

            if (argument.getComparison() != CoreActionComparison.STRING_EQUALS) {
                argument = arguments.get(1);
            }

            argument.setTarget(command);
        }
    }

    /**
     * Returns the aliases name.
     *
     * @return Aliases name
     */
    public String getName() {
        final ActionCondition condition = getArgsArgument();
        if (condition == null) {
            return command + "-Any";
        } else {
            final String comparison;
            if (condition.getComparison().equals(CoreActionComparison.INT_EQUALS)) {
                comparison = "equals";
            } else if (condition.getComparison().equals(CoreActionComparison.INT_GREATER)) {
                comparison = "greater";
            } else if (condition.getComparison().equals(CoreActionComparison.INT_LESS)) {
                comparison = "less";
            } else {
                comparison = condition.getComparison().toString();
            }
            return command + "-" + comparison + "-" + condition.getTarget();
        }
    }

    /**
     * Gets the aliases arguments.
     *
     * @return Argument list
     */
    public List<ActionCondition> getArguments() {
        return new ArrayList<ActionCondition>(arguments);
    }

    /**
     * Gets the aliases number of arguments argument.
     *
     * @return Number of arguments ActionCondition or null
     */
    public ActionCondition getArgsArgument() {
        ActionCondition argument = arguments.get(0);

        if (argument.getComparison() == CoreActionComparison.STRING_EQUALS) {
            if (arguments.size() > 1) {
                argument = arguments.get(1);
            } else {
                argument = null;
            }
        }

        return argument;
    }

    /**
     * Sets the aliases arguments.
     *
     * @param arguments A new list of arguments to set
     */
    public void setArguments(final List<ActionCondition> arguments) {
        if (!this.arguments.equals(arguments)) {
            this.arguments = new ArrayList<ActionCondition>(arguments);
        }
    }

    /**
     * Gets the aliases response.
     *
     * @return Response
     */
    public String[] getResponse() {
        return response.clone();
    }

    /**
     * Sets the aliases response.
     *
     * @param response New Response
     */
    public void setResponse(final String[] response) {
        if (!Arrays.equals(this.response, response)) {
            this.response = response.clone();
        }
    }

    /**
     * Updates this alias with the details of another alias.
     *
     * @param alias Alias to retrieve details from
     */
    public void update(final Alias alias) {
        setArguments(alias.getArguments());
        setCommand(alias.getCommand());
        setResponse(alias.getResponse());
    }

    /**
     * Checks if the specified alias matches this one
     *
     * @param alias Alias to check a match with
     *
     * @return true iif the alias matches this one
     */
    public boolean matches(final Alias alias) {
        return alias.getCommand().equalsIgnoreCase(command)
                && alias.getArguments().equals(arguments);
    }

    /**
     * Creates an action corresponding to this alias.
     *
     * @return A new action for this alias.
     */
    public Action createAction() {
        return new Action(
                AliasWrapper.getAliasWrapper().getName(),
                getName(),
                new ActionType[] {CoreActionType.UNKNOWN_COMMAND, },
                getResponse(),
                getArguments(),
                "");
    }

    /** {@inheritDoc} */
    @Override
    public String toString() {
        return "[name=aliases/" + getName() + ", triggers="
                + "[UNKNOWN_COMMAND], response="
                + Arrays.toString(response) + ", "
                + arguments + ", format='']";
    }
}