#include "raylib.h"
#include "stdio.h"
#include "sprite.h"
#include "raymath.h"

int main(){



    InitWindow(800, 450, "basic window");

    Texture2D texture;
    struct Sprite sprites[100];

    int destX = 0;
    int destY = 0;
    int clicked = 0;

    int pressed = 0;
    Vector2 rectStart = {0,0};

    texture = LoadTexture("assets/amulet.png");

    int j = 0;
    struct Sprite cursor = {&texture, 450, 225};

    Camera2D camera = { 0 };
    camera.target = (Vector2){400, 225};
    camera.rotation = 0.0f;
    camera.zoom = 1.0f;

    addSprite(sprites, &j, &texture, cursor.x + camera.target.x, cursor.y + camera.target.y);



    SetTargetFPS(60);
    while(!WindowShouldClose()){


        BeginDrawing();

        ClearBackground(RAYWHITE);

        BeginMode2D(camera);
        int i;
        int length = sizeof(sprites)/sizeof(sprites[0]);
        for(i=0; i < j; i++){
            DrawTexture(*sprites[i].texture, sprites[i].x, sprites[i].y, WHITE);
        }
        EndMode2D();

        DrawTexture(*cursor.texture, cursor.x, cursor.y, WHITE);

        cursor.x = GetMousePosition().x - texture.width / 2;
        cursor.y = GetMousePosition().y - texture.height / 2;

        /*
        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)){
            printf("Klick\n");
            addSprite(sprites, &j, &texture, cursor.x + camera.target.x, cursor.y + camera.target.y);
        }
        */

        if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT)){
            if(pressed == 0){
                rectStart.x = GetMousePosition().x;
                rectStart.y = GetMousePosition().y;
                pressed = 1;
            }
        }

        if(pressed){
            float width = GetMousePosition().x - rectStart.x;
            float height = GetMousePosition().y - rectStart.y;
            if(width + height > 1){
                //TODO: Fallunterscheidung für negative width / height?
                //      Auslagern in eigene Funktion
                DrawRectangleLines(rectStart.x, rectStart.y, width, height, GREEN);
            }
        }



        if(IsMouseButtonReleased(MOUSE_BUTTON_LEFT)){
            pressed = 0;
            float width = GetMousePosition().x - rectStart.x;
            float height = GetMousePosition().y - rectStart.y;
            if(width + height <= 1){
                printf("Klick\n");
                addSprite(sprites, &j, &texture, cursor.x + camera.target.x, cursor.y + camera.target.y);
            }
        }

        if(IsMouseButtonPressed(MOUSE_BUTTON_RIGHT)){
            clicked = 1;
            destX = cursor.x + camera.target.x;
            destY = cursor.y + camera.target.y;
        }

        if(IsKeyDown(KEY_W)){
            camera.target.y -= 100.0f * GetFrameTime();
        }
        if(IsKeyDown(KEY_S)){
            camera.target.y += 100.0f * GetFrameTime();
        }
        if(IsKeyDown(KEY_D)){
            camera.target.x += 100.0f * GetFrameTime();
        }
        if(IsKeyDown(KEY_A)){
            camera.target.x -= 100.0f * GetFrameTime();
        }

        if(clicked){
            Vector2 movement = {destX - sprites->x, destY - sprites->y};

            if(Vector2Length(movement) < 10.0f){
                clicked = false;
            }

            movement = Vector2Normalize(movement);
            movement = Vector2Scale(movement, 10);
            sprites->x += movement.x;
            sprites->y += movement.y;
        }


        EndDrawing();

    }

    CloseWindow();

    return 0;

}