/*
 * Decompiled with CFR 0.152.
 * 
 * Could not load the following classes:
 *  com.google.common.annotations.VisibleForTesting
 *  com.mojang.datafixers.kinds.App
 *  com.mojang.datafixers.kinds.Applicative
 *  com.mojang.serialization.Codec
 *  com.mojang.serialization.DataResult
 *  com.mojang.serialization.MapCodec
 *  com.mojang.serialization.codecs.RecordCodecBuilder
 *  it.unimi.dsi.fastutil.chars.CharArraySet
 *  it.unimi.dsi.fastutil.chars.CharSet
 */
package net.minecraft.world.item.crafting;

import com.google.common.annotations.VisibleForTesting;
import com.mojang.datafixers.kinds.App;
import com.mojang.datafixers.kinds.Applicative;
import com.mojang.serialization.Codec;
import com.mojang.serialization.DataResult;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import it.unimi.dsi.fastutil.chars.CharArraySet;
import it.unimi.dsi.fastutil.chars.CharSet;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.function.Function;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.ByteBufCodecs;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.util.ExtraCodecs;
import net.minecraft.util.Util;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.crafting.CraftingInput;
import net.minecraft.world.item.crafting.Ingredient;

public final class ShapedRecipePattern {
    private static final int MAX_SIZE = 3;
    public static final char EMPTY_SLOT = ' ';
    public static final MapCodec<ShapedRecipePattern> MAP_CODEC = Data.MAP_CODEC.flatXmap(ShapedRecipePattern::unpack, pattern -> pattern.data.map(DataResult::success).orElseGet(() -> DataResult.error(() -> "Cannot encode unpacked recipe")));
    public static final StreamCodec<RegistryFriendlyByteBuf, ShapedRecipePattern> STREAM_CODEC = StreamCodec.composite(ByteBufCodecs.VAR_INT, e -> e.width, ByteBufCodecs.VAR_INT, e -> e.height, Ingredient.OPTIONAL_CONTENTS_STREAM_CODEC.apply(ByteBufCodecs.list()), e -> e.ingredients, ShapedRecipePattern::createFromNetwork);
    private final int width;
    private final int height;
    private final List<Optional<Ingredient>> ingredients;
    private final Optional<Data> data;
    private final int ingredientCount;
    private final boolean symmetrical;

    public ShapedRecipePattern(int width, int height, List<Optional<Ingredient>> ingredients, Optional<Data> data) {
        this.width = width;
        this.height = height;
        this.ingredients = ingredients;
        this.data = data;
        this.ingredientCount = (int)ingredients.stream().flatMap(Optional::stream).count();
        this.symmetrical = Util.isSymmetrical(width, height, ingredients);
    }

    private static ShapedRecipePattern createFromNetwork(Integer width, Integer height, List<Optional<Ingredient>> ingredients) {
        return new ShapedRecipePattern(width, height, ingredients, Optional.empty());
    }

    public static ShapedRecipePattern of(Map<Character, Ingredient> key, String ... pattern) {
        return ShapedRecipePattern.of(key, List.of(pattern));
    }

    public static ShapedRecipePattern of(Map<Character, Ingredient> key, List<String> pattern) {
        Data data = new Data(key, pattern);
        return (ShapedRecipePattern)ShapedRecipePattern.unpack(data).getOrThrow();
    }

    private static DataResult<ShapedRecipePattern> unpack(Data data) {
        String[] shrunkPattern = ShapedRecipePattern.shrink(data.pattern);
        int width = shrunkPattern[0].length();
        int height = shrunkPattern.length;
        ArrayList<Optional<Ingredient>> ingredients = new ArrayList<Optional<Ingredient>>(width * height);
        CharArraySet unusedSymbols = new CharArraySet(data.key.keySet());
        for (String line : shrunkPattern) {
            for (int x = 0; x < line.length(); ++x) {
                Optional<Object> ingredient;
                char symbol = line.charAt(x);
                if (symbol == ' ') {
                    ingredient = Optional.empty();
                } else {
                    Ingredient ingredientForSymbol = data.key.get(Character.valueOf(symbol));
                    if (ingredientForSymbol == null) {
                        return DataResult.error(() -> "Pattern references symbol '" + symbol + "' but it's not defined in the key");
                    }
                    ingredient = Optional.of(ingredientForSymbol);
                }
                unusedSymbols.remove(symbol);
                ingredients.add(ingredient);
            }
        }
        if (!unusedSymbols.isEmpty()) {
            return DataResult.error(() -> ShapedRecipePattern.lambda$unpack$7((CharSet)unusedSymbols));
        }
        return DataResult.success((Object)new ShapedRecipePattern(width, height, ingredients, Optional.of(data)));
    }

    @VisibleForTesting
    static String[] shrink(List<String> pattern) {
        int left = Integer.MAX_VALUE;
        int right = 0;
        int top = 0;
        int bottom = 0;
        for (int i = 0; i < pattern.size(); ++i) {
            String line = pattern.get(i);
            left = Math.min(left, ShapedRecipePattern.firstNonEmpty(line));
            int lastNonSpace = ShapedRecipePattern.lastNonEmpty(line);
            right = Math.max(right, lastNonSpace);
            if (lastNonSpace < 0) {
                if (top == i) {
                    ++top;
                }
                ++bottom;
                continue;
            }
            bottom = 0;
        }
        if (pattern.size() == bottom) {
            return new String[0];
        }
        String[] result = new String[pattern.size() - bottom - top];
        for (int line = 0; line < result.length; ++line) {
            result[line] = pattern.get(line + top).substring(left, right + 1);
        }
        return result;
    }

    private static int firstNonEmpty(String line) {
        int index;
        for (index = 0; index < line.length() && line.charAt(index) == ' '; ++index) {
        }
        return index;
    }

    private static int lastNonEmpty(String line) {
        int index;
        for (index = line.length() - 1; index >= 0 && line.charAt(index) == ' '; --index) {
        }
        return index;
    }

    public boolean matches(CraftingInput input) {
        if (input.ingredientCount() != this.ingredientCount) {
            return false;
        }
        if (input.width() == this.width && input.height() == this.height) {
            if (!this.symmetrical && this.matches(input, true)) {
                return true;
            }
            if (this.matches(input, false)) {
                return true;
            }
        }
        return false;
    }

    private boolean matches(CraftingInput input, boolean xFlip) {
        for (int y = 0; y < this.height; ++y) {
            for (int x = 0; x < this.width; ++x) {
                ItemStack actual;
                Optional<Ingredient> expected = xFlip ? this.ingredients.get(this.width - x - 1 + y * this.width) : this.ingredients.get(x + y * this.width);
                if (Ingredient.testOptionalIngredient(expected, actual = input.getItem(x, y))) continue;
                return false;
            }
        }
        return true;
    }

    public int width() {
        return this.width;
    }

    public int height() {
        return this.height;
    }

    public List<Optional<Ingredient>> ingredients() {
        return this.ingredients;
    }

    private static /* synthetic */ String lambda$unpack$7(CharSet unusedSymbols) {
        return "Key defines symbols that aren't used in pattern: " + String.valueOf(unusedSymbols);
    }

    public record Data(Map<Character, Ingredient> key, List<String> pattern) {
        private static final Codec<List<String>> PATTERN_CODEC = Codec.STRING.listOf().comapFlatMap(strings -> {
            if (strings.size() > 3) {
                return DataResult.error(() -> "Invalid pattern: too many rows, 3 is maximum");
            }
            if (strings.isEmpty()) {
                return DataResult.error(() -> "Invalid pattern: empty pattern not allowed");
            }
            int firstLength = ((String)strings.getFirst()).length();
            for (String line : strings) {
                if (line.length() > 3) {
                    return DataResult.error(() -> "Invalid pattern: too many columns, 3 is maximum");
                }
                if (firstLength == line.length()) continue;
                return DataResult.error(() -> "Invalid pattern: each row must be the same width");
            }
            return DataResult.success((Object)strings);
        }, Function.identity());
        private static final Codec<Character> SYMBOL_CODEC = Codec.STRING.comapFlatMap(symbol -> {
            if (symbol.length() != 1) {
                return DataResult.error(() -> "Invalid key entry: '" + symbol + "' is an invalid symbol (must be 1 character only).");
            }
            if (" ".equals(symbol)) {
                return DataResult.error(() -> "Invalid key entry: ' ' is a reserved symbol.");
            }
            return DataResult.success((Object)Character.valueOf(symbol.charAt(0)));
        }, String::valueOf);
        public static final MapCodec<Data> MAP_CODEC = RecordCodecBuilder.mapCodec(i -> i.group((App)ExtraCodecs.strictUnboundedMap(SYMBOL_CODEC, Ingredient.CODEC).fieldOf("key").forGetter(d -> d.key), (App)PATTERN_CODEC.fieldOf("pattern").forGetter(d -> d.pattern)).apply((Applicative)i, Data::new));
    }
}