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package com.structurizr.dsl;

import com.structurizr.Workspace;
import com.structurizr.view.SystemLandscapeView;

final class SystemLandscapeViewParser extends AbstractViewParser {

    private static final String GRAMMAR = "systemLandscape [key] [description] {";

    private static final int KEY_INDEX = 1;
    private static final int DESCRIPTION_INDEX = 2;

    SystemLandscapeView parse(DslContext context, Tokens tokens) {
        // systemLandscape [key] [description]

        if (tokens.hasMoreThan(DESCRIPTION_INDEX)) {
            throw new RuntimeException("Too many tokens, expected: " + GRAMMAR);
        }

        Workspace workspace = context.getWorkspace();
        String key = "";
        String description = "";

        if (tokens.includes(KEY_INDEX)) {
            key = tokens.get(KEY_INDEX);
            validateViewKey(key);
        }

        if (tokens.includes(DESCRIPTION_INDEX)) {
            description = tokens.get(DESCRIPTION_INDEX);
        }

        return workspace.getViews().createSystemLandscapeView(key, description);
    }

}