package game

import rl "vendor:raylib"

WINDOW_TITLE  :: "Pong"

// good 16:9 baseline res, scales up to 1080 or 4k clean.
VIEWPORT_WIDTH :: 1280
VIEWPORT_HEIGHT :: 720
// Window size is what the viewport scales to
//WINDOW_WIDTH  :: 2560
// WINDOW_HEIGHT :: 1440
WINDOW_WIDTH  :: 1280
WINDOW_HEIGHT :: 720

Game :: struct {
    current_scene: Scene,
    is_paused:     bool,
    score_player:  int,
    score_enemy:   int,
}

// ------------------------------------------------------------------------------
// Game initializes and sets up any needed state
//  - Then we load in the initial scene
// ------------------------------------------------------------------------------
game_init :: proc(game: ^Game) {
	// Window configs
    rl.InitWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE)
    rl.SetTargetFPS(60)

    // initial state
    game.score_player  = 0
    game.score_enemy   = 0
    game.is_paused     = false

    // initial scene (should be menu when setup)
    game.current_scene = init_gameplay_scene()

    // init any systems/managers
    // game.input_manager = ....
    // game.audio_manager = ....
}

// ------------------------------------------------------------------------------
// Game loop update phase
//  - TODO: get inputs pressed and store them
//  - apply any updates to the current scene
// ------------------------------------------------------------------------------
game_update :: proc(game: ^Game) {
    dt := rl.GetFrameTime()
    // TODO: Get an input manager here

    // Update the current scene
    scene_update(game, dt)
}

// ------------------------------------------------------------------------------
// Game loop integration phase
//  - after the states and scene has been updated render whats active
// ------------------------------------------------------------------------------
game_render :: proc(game: ^Game) {
    rl.BeginDrawing()
    rl.ClearBackground(rl.BLACK)

    // render the current scene
    scene_render(game)

    rl.EndDrawing()
}

// ------------------------------------------------------------------------------
// Game shutdown
//  - before closing windows etc we cleanup free anything that was allocated
// ------------------------------------------------------------------------------
game_quit :: proc(game: ^Game) {
	// TODO: any cleanup goes here before 
	// shutting down the window

    rl.CloseWindow()
}

game_should_run :: proc() -> bool {
    return !rl.WindowShouldClose()
}