package me.lortseam.completeconfig.api;

import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import me.lortseam.completeconfig.entry.EnumOptions.DisplayType;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * Applied to declare that a field is an entry inside the mod's config. Only required if
 * the {@link ConfigEntryContainer} is not a POJO class.
 *
 * This is also used to change the behaviour of the entry regarding translations, bounds and other
 * miscellaneous options.
 */
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface ConfigEntry {

    /**
     * Specifies a custom translation key for this entry. If empty, the default key will be used.
     * @return a custom translation key
     */
    String customTranslationKey() default "";

    /**
     * Specifies one or more custom translation keys for this entry's tooltip. If empty, the default single-line or
     * multi-line keys will be used, depending on which are declared in the language file(s).
     * @return an array of custom tooltip translation keys
     */
    String[] customTooltipKeys() default {};

    /**
     * Specifies if the entry's field should get updated while at least one listener exists in the entry's class.
     *
     * By default the entry's field will not get modified when the config is saved, but all listeners will be called
     * with the updated value. Set this to true to always update the field when saving.
     * @return true if the field should get updated, else false
     */
    boolean forceUpdate() default false;

    /**
     * Specifies whether the game needs to be restarted after modifying this entry.
     * @return whether the game needs to be restarted after modifying this field's entry
     */
    boolean requiresRestart() default false;

    @NoArgsConstructor(access = AccessLevel.PRIVATE)
    class Bounded {

        /**
         * Applies bounds to an entry of type Integer.
         */
        @Target(ElementType.FIELD)
        @Retention(RetentionPolicy.RUNTIME)
        public @interface Integer {

            /**
             * The minimum bound.
             * @return the minimum bound
             */
            int min() default java.lang.Integer.MIN_VALUE;

            /**
             * The maximum bound.
             * @return the maximum bound
             */
            int max() default java.lang.Integer.MAX_VALUE;

            /**
             * Specifies whether the entry should be rendered as slider.
             * @return whether the entry should be rendered as slider
             */
            boolean slider() default true;

        }

        /**
         * Applies bounds to an entry of type Long.
         */
        @Target(ElementType.FIELD)
        @Retention(RetentionPolicy.RUNTIME)
        public @interface Long {

            /**
             * The minimum bound.
             * @return the minimum bound
             */
            long min() default java.lang.Long.MIN_VALUE;

            /**
             * The maximum bound.
             * @return the maximum bound
             */
            long max() default java.lang.Long.MAX_VALUE;

            /**
             * Specifies whether the entry should be rendered as slider.
             * @return whether the entry should be rendered as slider
             */
            boolean slider() default true;

        }

        /**
         * Applies bounds to an entry of type Float.
         */
        @Target(ElementType.FIELD)
        @Retention(RetentionPolicy.RUNTIME)
        public @interface Float {

            /**
             * The minimum bound.
             * @return the minimum bound
             */
            float min() default -java.lang.Float.MAX_VALUE;

            /**
             * The maximum bound.
             * @return the maximum bound
             */
            float max() default java.lang.Float.MAX_VALUE;

        }

        /**
         * Applies bounds to an entry of type Double.
         */
        @Target(ElementType.FIELD)
        @Retention(RetentionPolicy.RUNTIME)
        public @interface Double {

            /**
             * The minimum bound.
             * @return the minimum bound
             */
            double min() default -java.lang.Double.MAX_VALUE;

            /**
             * The maximum bound.
             * @return the maximum bound
             */
            double max() default java.lang.Double.MAX_VALUE;

        }

    }

    /**
     * Applied to an entry of type Enum to change the render behaviour.
     */
    @Target(ElementType.FIELD)
    @Retention(RetentionPolicy.RUNTIME)
    @interface EnumOptions {

        /**
         * Specifies how the entry should be rendered.
         * @return the desired {@link DisplayType}
         */
        DisplayType displayType() default DisplayType.BUTTON;

        //TODO: Add gui suggestionMode option

    }

    /**
     * Can be applied to a field inside a POJO {@link ConfigEntryContainer} class to declare that the field should not
     * be considered as config entry.
     */
    @Target(ElementType.FIELD)
    @Retention(RetentionPolicy.RUNTIME)
    @interface Ignore {

    }

}