package engine.object;

import engine.Engine;
import engine.gui.UIElement;
import engine.math.Vector3f;

import java.util.ArrayList;
import java.util.List;

/**
 * Un texte construit selon la même logique qu'une sprite pour faire un element d'interface utilisez UIElementText
 */
public class Text {

    private List<Letter> charList;
    private final float size;
    private final Engine engine;
    private final float zPos;

    private Vector3f transformation;

    public Text(String text, float z, float size, Engine engine){
        this.charList = new ArrayList<>();
        this.zPos = z;
        this.size = size;
        this.engine = engine;
        this.transformation = new Vector3f();
        this.textToArrayObjectGl(text);
    }

    public void show(){
        this.addCharListInEngine();
    }

    private void textToArrayObjectGl(String s){
        for (int i = 0; i < s.length(); i++){
            this.charList.add(this.charToObjectGl(s.charAt(i), i));
        }
    }

    private void addCharListInEngine(){
        int i = 0;
        for (Letter obj : this.charList){
            addCharInEngine(i, obj);
            i++;
        }
    }

    private void addCharInEngine(int i, Letter obj){
        obj.translate(new Vector3f(i * 10.0f * this.size, 0.0f, 0.0f));
        obj.translate(transformation);
        this.engine.add_objectGl(obj);
    }

    public void linkToUIElement(UIElement ui){
    }

    public void setNewText(String text){
        int i = 0;
        for (Letter obj : this.charList) {
            ObjectGlSetCharWrap(text.charAt(i), obj);
            i++;
            if (i >= text.length()) break;
        }
        while (i < text.length()){
            Letter obj = this.charToObjectGl(text.charAt(i), i);
            this.charList.add(obj);
            addCharInEngine(i, obj);
            i++;
        }
        if (i < this.charList.size()) removeFromIndexToEnd(i);

    }

    public void translate(Vector3f vec){
        transformation = transformation.addXYZ(vec);
        for (ObjectGl obj : this.charList){
            obj.translate(vec);
        }
    }

    public void remove(){
        for (ObjectGl obj : this.charList){
            this.engine.remove_objectGl(obj);
        }
    }

    public List<ObjectGl> getObj(){
        return new ArrayList<>(this.charList);
    }

    private void removeFromIndexToEnd(int i){
        int j = 0;
        for (Letter objectGl : this.charList){
            if (j >= i) {
                this.engine.remove_objectGl(objectGl);
            }
            j++;
        }
        this.charList = this.charList.subList(0, i);
    }

    private Letter charToObjectGl(char a, int index){
        Letter objectGl = new Letter(this.zPos, 1.0f, 1.0f, this.size, "textures/dejavu10x10_gs_tc.png", null, index);
        objectGl.setShader("shaders/StylishShaders/BasicVert.glsl","shaders/StylishShaders/TextFrag.glsl");
        ObjectGlSetCharWrap(a, objectGl);
        return objectGl;
    }

    private void ObjectGlSetCharWrap(char a, ObjectGl obj){
        if (a < 132 && a > 96){
            obj.setTextureWrap(0.0f + (a - 97) * 10.0f,40.0f,10.0f,10.0f, ObjectGl.DEFAULT);
        }
        else if (a < 91 && a > 64){
            obj.setTextureWrap(0.0f + (a - 65) * 10.0f,30.0f,10.0f,10.0f, ObjectGl.DEFAULT);
        }
        else if (a < 64 && a > 31){
            obj.setTextureWrap(0.0f + (a - 32) * 10.0f,0.0f,10.0f,10.0f, ObjectGl.DEFAULT);
        }
    }

    public List<Letter> getCharList(){
        return this.charList;
    }

}