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package cucumber.junit;

import cucumber.io.MultiLoader;
import cucumber.runtime.RuntimeOptions;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

class RuntimeOptionsFactory {
    private Class clazz;

    public RuntimeOptionsFactory(Class clazz) {
        this.clazz = clazz;
    }

    public RuntimeOptions create() {
        List args = new ArrayList();
        Cucumber.Options options = getOptions(clazz);

        addDryRun(options, args);
        addMonochrome(options, args);
        addGlue(options, clazz, args);
        addTags(options, args);
        addFormats(options, args);
        addFeatures(options, clazz, args);
        addStrict(options, args);

        return new RuntimeOptions(args.toArray(new String[args.size()]));

    }

    private Cucumber.Options getOptions(Class clazz) {
        return clazz.getAnnotation(Cucumber.Options.class);
    }

    private void addDryRun(Cucumber.Options options, List args) {
        if (options != null) {
            if (options.dryRun()) {
                args.add("--dry-run");
            }
        }
    }

    private void addMonochrome(Cucumber.Options options, List args) {
        if (options != null) {
            if (options.monochrome() || runningInEnvironmentWithoutAnsiSupport()) {
                args.add("--monochrome");
            }
        }
    }

    private boolean runningInEnvironmentWithoutAnsiSupport() {
        boolean intelliJidea = System.getProperty("idea.launcher.bin.path") != null;
        // TODO: What does Eclipse use?
        return intelliJidea;
    }

    private void addGlue(Cucumber.Options options, Class clazz, List args) {
        if (options != null && options.glue().length != 0) {
            for (String glue : options.glue()) {
                args.add("--glue");
                args.add(glue);
            }
        } else {
            args.add("--glue");
            args.add(MultiLoader.CLASSPATH_SCHEME + packagePath(clazz));
        }
    }

    private void addTags(Cucumber.Options options, List args) {
        if (options != null) {
            for (String tags : options.tags()) {
                args.add("--tags");
                args.add(tags);
            }
        }
    }

    private void addFormats(Cucumber.Options options, List args) {
        if (options != null && options.format().length != 0) {
            for (String format : options.format()) {
                args.add("--format");
                args.add(format);
            }
        } else {
            args.add("--format");
            args.add("null");
        }
    }

    private void addFeatures(Cucumber.Options options, Class clazz, List args) {
        if (options != null && options.features().length != 0) {
            Collections.addAll(args, options.features());
        } else {
            args.add(MultiLoader.CLASSPATH_SCHEME + packagePath(clazz));
        }
    }

    private void addStrict(Cucumber.Options options, List args) {
        if (options != null && options.strict()) {
            args.add("--strict");
        }
    }

    static String packagePath(Class clazz) {
        return packagePath(packageName(clazz.getName()));
    }

    static String packagePath(String packageName) {
        return packageName.replace('.', '/');
    }

    static String packageName(String className) {
        return className.substring(0, Math.max(0, className.lastIndexOf(".")));
    }

}