package net.knarcraft.ffmpegconverter.config;

import org.jetbrains.annotations.NotNull;

import java.util.HashSet;
import java.util.Set;

/**
 * A representation of all configuration keys
 */
public class ConfigKey<T> {

    private static final Set<ConfigKey<?>> allKeys = new HashSet<>();

    /**
     * The configuration key for the list of hardware-accelerated encoders available on the system
     */
    public static final ConfigKey<String> HARDWARE_ACCELERATED_ENCODERS = new ConfigKey<>("encoders-hardware-accelerated", String.class, "qsv,cuda,dxva2,d3d11va,opencl,vulkan");

    /**
     * The configuration key for toggling debug mode
     */
    public static final ConfigKey<Boolean> DEBUG = createKey("debug", Boolean.class, false);

    /**
     * The configuration key for toggling hardware encoding
     */
    public static final ConfigKey<Boolean> USE_HARDWARE_ENCODING = createKey("hardware-acceleration-encode", Boolean.class, false);

    /**
     * The configuration key for toggling hardware decoding
     */
    public static final ConfigKey<Boolean> USE_HARDWARE_DECODING = createKey("hardware-acceleration-decode", Boolean.class, true);

    /**
     * The configuration key for toggling forced flac encoding
     */
    public static final ConfigKey<Boolean> ENCODE_FLAC_ALWAYS = createKey("encode-flac-always", Boolean.class, false);

    /**
     * The configuration key for anime audio languages
     */
    public static final ConfigKey<String> AUDIO_LANGUAGES_ANIME = createKey("audio-languages-anime", String.class, "jpn,eng,*");

    /**
     * The configuration key for anime subtitle languages
     */
    public static final ConfigKey<String> SUBTITLE_LANGUAGES_ANIME = createKey("subtitle-languages-anime", String.class, "eng,*");

    /**
     * The configuration key for the minimal subtitle preference
     */
    public static final ConfigKey<String> MINIMAL_SUBTITLE_PREFERENCE = createKey("minimal-subtitle-preference", String.class, "AVOID");

    /**
     * The configuration key for whether to de-interlace video streams
     */
    public static final ConfigKey<Boolean> DE_INTERLACE_VIDEO = createKey("de-interlace-video", Boolean.class, false);

    /**
     * The configuration key for whether to copy attached cover images
     */
    public static final ConfigKey<Boolean> COPY_ATTACHED_IMAGES = createKey("copy-attached-images", Boolean.class, false);

    /**
     * The configuration key for whether to overwrite the original file when converting
     */
    public static final ConfigKey<Boolean> OVERWRITE_FILES = createKey("overwrite-files", Boolean.class, false);

    private final String configKey;
    private final T defaultValue;
    private final Class<T> type;

    /**
     * Instantiates a new config key
     *
     * @param configKey    <p>The storage key in the configuration file</p>
     * @param type         <p>The type of this option's value</p>
     * @param defaultValue <p>The default value of this option</p>
     */
    private ConfigKey(@NotNull String configKey, @NotNull Class<T> type, @NotNull T defaultValue) {
        this.configKey = configKey;
        this.type = type;
        this.defaultValue = defaultValue;
    }

    /**
     * Creates a new config key
     *
     * @param configKey    <p>The storage key in the configuration file</p>
     * @param type         <p>The type of this option's value</p>
     * @param defaultValue <p>The default value of this option</p>
     * @param <F>          <p>The type of key to create</p>
     * @return <p>The new config key</p>
     */
    private static <F> ConfigKey<F> createKey(@NotNull String configKey, @NotNull Class<F> type, @NotNull F defaultValue) {
        ConfigKey<F> key = new ConfigKey<>(configKey, type, defaultValue);
        allKeys.add(key);
        return key;
    }

    /**
     * Gets the type of this option's value
     *
     * @return <p>The type of the value</p>
     */
    @NotNull
    public Class<T> getType() {
        return this.type;
    }

    /**
     * Gets the default value for the option represented by this key
     *
     * @return <p>The default value</p>
     */
    @NotNull
    public T getDefaultValue() {
        return this.defaultValue;
    }

    @Override
    public String toString() {
        return this.configKey;
    }

    /**
     * Gets all configuration keys
     *
     * @return <p>All configuration keys</p>
     */
    @NotNull
    public static ConfigKey<?>[] values() {
        return allKeys.toArray(new ConfigKey[0]);
    }

}