#include "player.h"
#include "debug.h"
#include "game_world.h"

Player* MakePlayer() {
	Player* self = malloc(sizeof(Player));
	ASSERT_RETURN(self != NULL, NULL, "Could not allocate enough space for Player instance");

	Spritesheet* walk = spritesheet_load("assets/sprites/player/player_walk.png", IVectorFrom(512));
	Spritesheet* idle = spritesheet_load("assets/sprites/player/player_walk.png", IVectorFrom(512));

	*self = (Player){
		.transform = IdentityTransform,
		.faceDirection = 0,
		.animationStateMachine = state_machine_init(self, PlayerIdle()),
		.animFrame = 0,
		.sprite = sprite_from_spritesheet(walk, 0),
		.stand = idle,
		.walk = walk,
		.animFrameInterval = 1.0f/4.0f,
		.animFrameTimer = 0.0f,
	};

	return self;
}

Player* SpawnPlayer(Vector location) {
	Player* self = MakePlayer();

	self->transform.position = location;

	game_world_add_entity(Player_as_BehaviourEntity(self));

	return self;
}

void PlayerStart(Player* self) {}

void PlayerUpdate(Player* self, float deltaTime) {
	state_machine_update(self->animationStateMachine, deltaTime);
}

void PlayerDestroy(Player* self) {
	state_machine_destroy(self->animationStateMachine);
	spritesheet_destroy(self->walk);
	spritesheet_destroy(self->stand);
	sprite_destroy(self->sprite);
}

void PlayerDraw(Player* self) {
	sprite_entity_draw(Player_as_SpriteEntity(self));
}

Sprite* PlayerGetSprite(Player* self) {
	return self->sprite;
}

Transform* PlayerGetTransform(Player* self) {
	return &self->transform;
}

const State* PlayerAnimationUpdate(Player* self, float deltaTime) {
	self->animFrameTimer += deltaTime;

	if (self->animFrameTimer > self->animFrameInterval) {
		self->animFrameTimer = 0.f;
		size_t nextFrame = self->animFrame + 8;
		sprite_set_tile(self->sprite, nextFrame);

		if (nextFrame > spritesheet_get_tile_count(sprite_get_spritesheet(self->sprite))) {
			return PlayerIdle();
		}
	}

	return state_machine_get_current_state(self->animationStateMachine);
}

void PlayerAnimationExit(Player* self) {}

void PlayerIdleEnter(Player* self) {
	self->sprite = sprite_from_spritesheet(self->stand, 0);
}