module graphics.gamelogic;

import raylib;
import bindbc.lua;
import variables;
import core.stdc.stdlib;
import core.stdc.time;
import graphics.engine;
import scripts.lua;
import std.stdio;
import std.conv;
import graphics.effects;
import std.string;
import std.math;
import dialogs.dialogbox;
import system.abstraction;
import system.config;
import std.file;

/** 
 * this module contains game logic, which was removed from engine.d for better readability.
**/
 
void gameInit()
{
    circle = LoadTexture("res/misc/circle.png");
    dialogBackgroundTex = LoadTexture("res/misc/TEX#win_01b.PNG");
    choiceWindowTex = LoadTexture("res/misc/TEX#win_00b.PNG");
    if (WindowShouldClose()) {
        currentGameState = GameState.Exit;
    } else {
        debugWriteln("Game initializing.");
        systemSettings = loadSettingsFromConfigFile();
        luaExec = systemSettings.script_path;
    }
}

void texturesLogic(TextureEngine[] textures) {
    for (int i = 0; i < textures.length; i++) {
        if (textures[i].drawTexture) {
            if (textures[i].alpha < 1.0f) {
                textures[i].alpha += GetFrameTime() * textures[i].fadeSpeed;
                if (textures[i].alpha > 1.0f) textures[i].alpha = 1.0f;
            }
        } else {
            if (textures[i].alpha > 0.0f) {
                textures[i].alpha -= GetFrameTime() * textures[i].fadeSpeed;
                if (textures[i].alpha < 0.0f) textures[i].alpha = 0.0f;
            }
        }

        if (textures[i].alpha > 0.0f) {
            float centeredX = textures[i].x - (textures[i].width * textures[i].scale / 2);
            float centeredY = textures[i].y - (textures[i].height * textures[i].scale / 2);
            
            Color tint = Colors.WHITE;
            tint.a = cast(ubyte)(255 * textures[i].alpha);
            
            DrawTextureEx(textures[i].texture,
                Vector2(centeredX, centeredY),
                0.0,
                textures[i].scale,
                tint
            );
        }
    }
}

void effectsLogic()
{
    UpdateMusicStream(music);
    if (isCameraMoving) {
        float delta = GetFrameTime() * cameraMoveSpeed;
        camera.target.x += (cameraTargetX - camera.target.x) * delta;
        camera.target.y += (cameraTargetY - camera.target.y) * delta;
        camera.zoom += (cameraTargetZoom - camera.zoom) * delta;

        if (fabs(camera.target.x - cameraTargetX) < 5.0f &&
            fabs(camera.target.y - cameraTargetY) < 5.0f &&
            fabs(camera.zoom - cameraTargetZoom) < 0.5f) {
            isCameraMoving = false;
        }
    }
    playUIAnimation(framesUI);
}

void backgroundLogic() {
    texturesLogic(backgroundTextures);
}

void characterLogic() {
    texturesLogic(characterTextures);
}

void dialogLogic() {
    if (showDialog) {
        displayDialog(messageGlobal, choices, selectedChoice, choicePage, textFont, &showDialog, typingSpeed, 
        circle, dialogBackgroundTex, choiceWindowTex);
    }
}