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/*
 * Copyright 2017 Yuriy Kiselev ([email protected])
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.ykiselev.gfx.sprite.font;

import com.github.ykiselev.gfx.sprite.font.chars.CharRange;
import javafx.scene.text.Font;

import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * @author Yuriy Kiselev ([email protected]).
 */
public final class SpriteFontReceipt {

    private final Font font;

    private final List ranges;

    private final char defaultCharacter;

    private final int glyphXBorder;

    private final int glyphYBorder;

    public SpriteFontReceipt(Font font, List ranges, char defaultCharacter, int glyphXBorder, int glyphYBorder) {
        this.font = font;
        this.ranges = ranges;
        this.defaultCharacter = defaultCharacter;
        this.glyphXBorder = glyphXBorder;
        this.glyphYBorder = glyphYBorder;
    }

    public SpriteFontAndImage build() {
        final List src = new ArrayList<>(ranges);
        src.add(new CharRange(defaultCharacter, defaultCharacter));
        final List ranges = join(src);
        final List chars = ranges.stream()
                .sorted()
                .map(CharRange::get)
                .collect(Collectors.toList());
        return new FontRasterizer(
                font,
                chars,
                defaultCharacter,
                glyphXBorder,
                glyphYBorder
        ).build();
    }

    private List join(List src) {
        final List result = new ArrayList<>();
        int i = 0;
        while (i < src.size()) {
            final ListIterator it = src.listIterator(i);
            CharRange range = it.next();
            while (it.hasNext()) {
                final CharRange other = it.next();
                final CharRange joined = range.join(other);
                if (joined != null) {
                    it.remove();
                    range = joined;
                }
            }
            result.add(range);
            i++;
        }
        return result;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        SpriteFontReceipt that = (SpriteFontReceipt) o;
        return defaultCharacter == that.defaultCharacter &&
                glyphXBorder == that.glyphXBorder &&
                glyphYBorder == that.glyphYBorder &&
                Objects.equals(font, that.font) &&
                Objects.equals(ranges, that.ranges);
    }

    @Override
    public int hashCode() {
        return Objects.hash(font, ranges, defaultCharacter, glyphXBorder, glyphYBorder);
    }

    @Override
    public String toString() {
        return "SpriteFontReceipt{" +
                "font=" + font +
                ", ranges=" + ranges +
                ", defaultCharacter=" + defaultCharacter +
                ", glyphXBorder=" + glyphXBorder +
                ", glyphYBorder=" + glyphYBorder +
                '}';
    }
}