/*******************************************************************************************
*
*   raylib [audio] example - music stream
*
*   Example complexity rating: [★☆☆☆] 1/4
*
*   Example originally created with raylib 1.3, last time updated with raylib 4.2
*
*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
*   BSD-like license that allows static linking with closed source software
*
*   Copyright (c) 2015-2025 Ramon Santamaria (@raysan5)
*
********************************************************************************************/

#include "raylib.h"

//------------------------------------------------------------------------------------
// Program main entry point
//------------------------------------------------------------------------------------
int main(void)
{
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;

    InitWindow(screenWidth, screenHeight, "raylib [audio] example - music stream");

    InitAudioDevice();              // Initialize audio device

    Music music = LoadMusicStream("resources/country.mp3");

    PlayMusicStream(music);

    float timePlayed = 0.0f;        // Time played normalized [0.0f..1.0f]
    bool pause = false;             // Music playing paused

    float pan = 0.0f;               // Default audio pan center [-1.0f..1.0f]
    SetMusicPan(music, pan);

    float volume = 0.8f;            // Default audio volume [0.0f..1.0f]
    SetMusicVolume(music, volume);

    SetTargetFPS(30);               // Set our game to run at 30 frames-per-second
    //--------------------------------------------------------------------------------------

    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdateMusicStream(music);   // Update music buffer with new stream data

        // Restart music playing (stop and play)
        if (IsKeyPressed(KEY_SPACE))
        {
            StopMusicStream(music);
            PlayMusicStream(music);
        }

        // Pause/Resume music playing
        if (IsKeyPressed(KEY_P))
        {
            pause = !pause;

            if (pause) PauseMusicStream(music);
            else ResumeMusicStream(music);
        }

        // Set audio pan
        if (IsKeyDown(KEY_LEFT))
        {
            pan -= 0.05f;
            if (pan < -1.0f) pan = -1.0f;
            SetMusicPan(music, pan);
        }
        else if (IsKeyDown(KEY_RIGHT))
        {
            pan += 0.05f;
            if (pan > 1.0f) pan = 1.0f;
            SetMusicPan(music, pan);
        }

        // Set audio volume
        if (IsKeyDown(KEY_DOWN))
        {
            volume -= 0.05f;
            if (volume < 0.0f) volume = 0.0f;
            SetMusicVolume(music, volume);
        }
        else if (IsKeyDown(KEY_UP))
        {
            volume += 0.05f;
            if (volume > 1.0f) volume = 1.0f;
            SetMusicVolume(music, volume);
        }

        // Get normalized time played for current music stream
        timePlayed = GetMusicTimePlayed(music)/GetMusicTimeLength(music);

        if (timePlayed > 1.0f) timePlayed = 1.0f;   // Make sure time played is no longer than music
        //----------------------------------------------------------------------------------

        // Draw
        //----------------------------------------------------------------------------------
        BeginDrawing();

            ClearBackground(RAYWHITE);

            DrawText("MUSIC SHOULD BE PLAYING!", 255, 150, 20, LIGHTGRAY);

            DrawText("LEFT-RIGHT for PAN CONTROL", 320, 74, 10, DARKBLUE);
            DrawRectangle(300, 100, 200, 12, LIGHTGRAY);
            DrawRectangleLines(300, 100, 200, 12, GRAY);
            DrawRectangle(300 + (pan + 1.0)/2.0f*200 - 5, 92, 10, 28, DARKGRAY);

            DrawRectangle(200, 200, 400, 12, LIGHTGRAY);
            DrawRectangle(200, 200, (int)(timePlayed*400.0f), 12, MAROON);
            DrawRectangleLines(200, 200, 400, 12, GRAY);

            DrawText("PRESS SPACE TO RESTART MUSIC", 215, 250, 20, LIGHTGRAY);
            DrawText("PRESS P TO PAUSE/RESUME MUSIC", 208, 280, 20, LIGHTGRAY);

            DrawText("UP-DOWN for VOLUME CONTROL", 320, 334, 10, DARKGREEN);
            DrawRectangle(300, 360, 200, 12, LIGHTGRAY);
            DrawRectangleLines(300, 360, 200, 12, GRAY);
            DrawRectangle(300 + volume*200 - 5, 352, 10, 28, DARKGRAY);

        EndDrawing();
        //----------------------------------------------------------------------------------
    }

    // De-Initialization
    //--------------------------------------------------------------------------------------
    UnloadMusicStream(music);   // Unload music stream buffers from RAM

    CloseAudioDevice();         // Close audio device (music streaming is automatically stopped)

    CloseWindow();              // Close window and OpenGL context
    //--------------------------------------------------------------------------------------

    return 0;
}