/*
 * Copyright (c) 2018, 2019, 2020 shedaniel
 * Licensed under the MIT License (the "License").
 */

package me.shedaniel.rei.api;

import me.shedaniel.math.api.Rectangle;
import me.shedaniel.rei.RoughlyEnoughItemsCore;
import me.shedaniel.rei.gui.config.SearchFieldLocation;
import me.shedaniel.rei.utils.CollectionUtils;
import net.minecraft.util.ActionResult;
import org.jetbrains.annotations.ApiStatus;

import java.util.List;
import java.util.function.Supplier;

import static net.minecraft.util.ActionResult.PASS;

public interface DisplayHelper {
    
    static DisplayHelper getInstance() {
        return RoughlyEnoughItemsCore.getDisplayHelper();
    }
    
    /**
     * Gets the sorted version of all responsible bounds handlers
     *
     * @param screenClass the class for checking responsible bounds handlers
     * @return the sorted list of responsible bounds handlers
     * @see DisplayHelper#getResponsibleBoundsHandler(Class) for the unsorted version
     */
    List<DisplayBoundsHandler<?>> getSortedBoundsHandlers(Class<?> screenClass);
    
    /**
     * Gets all registered bounds handlers
     *
     * @return the list of registered bounds handlers
     * @deprecated see {@link #getAllOverlayDeciders()}
     */
    @Deprecated
    @ApiStatus.ScheduledForRemoval
    default List<DisplayBoundsHandler<?>> getAllBoundsHandlers() {
        return (List) CollectionUtils.castAndMap(getAllOverlayDeciders(), DisplayBoundsHandler.class);
    }
    
    /**
     * Gets all registered overlay deciders
     *
     * @return the list of registered overlay deciders
     */
    List<OverlayDecider> getAllOverlayDeciders();
    
    /**
     * Gets all responsible bounds handlers
     *
     * @param screenClass the class for checking responsible bounds handlers
     * @return the the list of responsible bounds handlers
     * @see DisplayHelper#getSortedBoundsHandlers(Class) for the sorted version
     */
    DisplayBoundsHandler<?> getResponsibleBoundsHandler(Class<?> screenClass);
    
    /**
     * Registers a bounds handler
     *
     * @param handler the handler to register
     * @deprecated see {@link #registerHandler(OverlayDecider)}
     */
    @Deprecated
    @ApiStatus.ScheduledForRemoval
    default void registerBoundsHandler(DisplayBoundsHandler<?> handler) {
        registerHandler(handler);
    }
    
    /**
     * Registers a bounds decider
     *
     * @param decider the decider to register
     */
    void registerHandler(OverlayDecider decider);
    
    /**
     * Gets the base bounds handler api for exclusion zones
     *
     * @return the base bounds handler
     * @see BaseBoundsHandler#getInstance()
     */
    @ApiStatus.Internal
    BaseBoundsHandler getBaseBoundsHandler();
    
    interface DisplayBoundsHandler<T> extends OverlayDecider {
        /**
         * Gets the base supported class for the bounds handler
         *
         * @return the base class
         */
        Class<?> getBaseSupportedClass();
        
        @Override
        default boolean isHandingScreen(Class<?> screen) {
            return getBaseSupportedClass().isAssignableFrom(screen);
        }
        
        /**
         * Gets the left bounds of the overlay
         *
         * @param screen the current screen
         * @return the left bounds
         */
        Rectangle getLeftBounds(T screen);
        
        /**
         * Gets the right bounds of the overlay
         *
         * @param screen the current screen
         * @return the right bounds
         */
        Rectangle getRightBounds(T screen);
        
        /**
         * Checks if item slot can fit the screen
         *
         * @param left       the left x coordinates of the stack
         * @param top        the top y coordinates for the stack
         * @param screen     the current screen
         * @param fullBounds the current bounds
         * @return whether the item slot can fit
         * @see BaseBoundsHandler#registerExclusionZones(Class, Supplier) for easier api
         */
        default ActionResult canItemSlotWidgetFit(int left, int top, T screen, Rectangle fullBounds) {
            return PASS;
        }
        
        /**
         * Checks if mouse is inside the overlay
         *
         * @param mouseX mouse's x coordinates
         * @param mouseY mouse's y coordinates
         * @return whether mouse is inside the overlay
         */
        default ActionResult isInZone(double mouseX, double mouseY) {
            return PASS;
        }
        
        /**
         * Gets the item list bounds by the overlay bounds
         *
         * @param rectangle the overlay bounds
         * @return the item list bounds
         */
        default Rectangle getItemListArea(Rectangle rectangle) {
            return new Rectangle(rectangle.x + 1, rectangle.y + 2 + (ConfigObject.getInstance().getSearchFieldLocation() == SearchFieldLocation.TOP_SIDE ? 24 : 0) + (ConfigObject.getInstance().isEntryListWidgetScrolled() ? 0 : 22), rectangle.width - 2, rectangle.height - (ConfigObject.getInstance().getSearchFieldLocation() != SearchFieldLocation.CENTER ? 27 + 22 : 27) + (!ConfigObject.getInstance().isEntryListWidgetScrolled() ? 0 : 22));
        }
        
        default Rectangle getFavoritesListArea(Rectangle rectangle) {
            int offset = 31 + (ConfigObject.getInstance().doesShowUtilsButtons() ? 25 : 0);
            return new Rectangle(rectangle.x + 1, rectangle.y + 2 + offset, rectangle.width - 2, rectangle.height - 5 - offset);
        }
        
        /**
         * Checks if REI should recalculate the overlay bounds
         *
         * @param isOnRightSide whether the user has set the overlay to the right
         * @param rectangle     the current overlay bounds
         * @return whether REI should recalculate the overlay bounds
         */
        default boolean shouldRecalculateArea(boolean isOnRightSide, Rectangle rectangle) {
            return false;
        }
        
        /**
         * Gets the priority of the handler, the higher it is, the earlier it is called.
         *
         * @return the priority in float
         */
        @Override
        default float getPriority() {
            return 0f;
        }
    }
    
}