#include <raylib.h>

struct AnimData 
{
    Rectangle rec;
    Vector2 pos;
    int frame;
    float updateTime;
    float runningTime;
    
};

int main() {

   /* // Specified width and height
    const int windowWidth{800};
    const int windowHeight{600};
    */

    // windows array dimensions
    float windowArray[2] = { 800.0, 600.0 };

    // Initialize the window
    InitWindow(windowArray[0], windowArray[1], "ECS Dapper Dasher");
    
    // Acceleration due to gravity (pixels per frame/frame)
    const int gravity{ 1'000 };

    // Scarfy setup
    Texture2D scarfy = LoadTexture("textures/scarfy.png"); // Load the texture
    AnimData scarfyData;
    scarfyData.rec.width = scarfy.width / 6;
    scarfyData.rec.height = scarfy.height;
    scarfyData.rec.x = 0;
    scarfyData.rec.y = 0;

    scarfyData.pos.x = windowArray[0] / 2 - scarfyData.rec.width / 2;
    scarfyData.pos.y = windowArray[1] - scarfyData.rec.height;
    scarfyData.frame = 0;
    scarfyData.updateTime = 1.0 / 12.0;
    scarfyData.runningTime = 0.0;

    // Nebula setup
    Texture2D nebula = LoadTexture("textures/12_nebula_spritesheet.png"); // Load the texture

    // Nebula anim

    AnimData nebData{ 
        {0.0, 0.0, nebula.width / 8, nebula.height / 8}, // Rectangle rec
        {windowArray[0], windowArray[1] - nebula.height / 8}, // Vector2 pos
        0, // int frame
        1.0 / 12.0, // float updateTime 
        0.0 // float runningTime
    };

    AnimData neb2Data{ 
        {0.0, 0.0, nebula.width / 8, nebula.height / 8}, // Rectangle rec
        {windowArray[0] + 300, windowArray[1] - nebula.height / 8}, // Vector2 pos
        0, // int frame
        1.0 / 16.0, // float updateTime 
        0.0 // float runningTime
    };

    // Nebulea
    AnimData nebulae[2]{};

    for (int i = 0; i < 2; i++) 
    {
        nebulae[i].rec.width = nebula.width / 8;
        nebulae[i].rec.height = nebula.height / 8;
        nebulae[i].rec.x = 0;
        nebulae[i].rec.y = 0;
        nebulae[i].pos.y = windowArray[1] - nebulae[i].rec.height;
        nebulae[i].frame = 0;
        nebulae[i].runningTime = 0.0;
        nebulae[i].updateTime = 1.0 / 16.0;
    }

    int nebVel{-200}; // Nebula x velocity (pixels per second)

    // Animation Frame
    int frame{};

    const float updateTime{1.0 / 12.0}; // Time between frames
    float runningTime{}; // Time since last frame change

    // Is the rectangle in the air
    bool isInAir{};

    int velocity{}; // Current velocity

    // Jump velocity (pixels per second)
    const int jumpVelocity{-600};

    // Main game loop
    SetTargetFPS(60);
    while (!WindowShouldClose())
    {
        // Delta time
        const float dT = GetFrameTime(); // Delta time (time since last frame)
        
        // Start Game Logic
        BeginDrawing();
        ClearBackground(WHITE);

        // perform ground check
        if (scarfyData.pos.y >= windowArray[1] - scarfyData.rec.height) {
            velocity = 0; // Reset velocity when on the ground
            isInAir = false;
        }
        else
        {
            velocity += gravity * dT; // Apply gravity when in the air
            isInAir = true;
        }

        // Jump logic / jump check
        if (IsKeyPressed(KEY_SPACE) && !isInAir) {
            velocity += jumpVelocity; // Jump velocity
        }
        
        // Nebula movement
        nebData.pos.x += nebVel * dT;

        // Nebula 2 movement
        neb2Data.pos.x += nebVel * dT;

        // Update position
        scarfyData.pos.y += velocity * dT;

        // Scarfy Animation Logic
        if (!isInAir) 
        {
            // Update running time
            runningTime += dT;
            if (runningTime >= updateTime) 
            {
                runningTime = 0.0;
                
                // Update animation frame
                scarfyData.rec.x = frame * scarfyData.rec.width;
                frame++;
                if (frame > 5)
                {
                    frame = 0;
                }
            }
        }

        // Nebula animation frame
        nebulae[0].runningTime += dT;
        if (nebulae[0].runningTime >= (nebData.updateTime)) 
        {
            nebulae[0].runningTime = 0.0;
            nebulae[0].rec.x = nebulae[0].frame * nebulae[0].rec.width;
            nebulae[0].frame++;
            if (nebulae[0].frame > 7)
            {
                nebulae[0].frame = 0;
            }
        }

        // Nebula animation frame
        nebulae[1].runningTime += dT;
        if (nebulae[1].runningTime >= (nebulae[1].updateTime)) 
        {
            nebulae[1].runningTime = 0.0;
            nebulae[1].rec.x = nebulae[1].frame * nebulae[1].rec.width;
            nebulae[1].frame++;
            if (nebulae[1].frame > 7)
            {
                nebulae[1].frame = 0;
            }
        }

        for (int i = 0; i < 2; i++) 
        {
            // Respawn nebula if it goes off screen
            if (nebulae[i].pos.x <= -nebulae[i].rec.width) 
            {
                nebulae[i].pos.x = windowArray[0];
            }
        }

        // draw Nebula
        DrawTextureRec(nebula, nebulae[0].rec, nebulae[0].pos, WHITE); // Draw the texture
        // draw second Nebula
        DrawTextureRec(nebula, nebulae[1].rec, nebulae[1].pos, RED); // Draw the texture

        // draw Scarfy
        DrawTextureRec(scarfy, scarfyData.rec, scarfyData.pos, WHITE); // Draw the texture
        
        // End Game Logic
        EndDrawing();
    }
    
    // Unload texture
    UnloadTexture(scarfy);
    UnloadTexture(nebula);

    // Close the window properly
    CloseWindow();
}