#include "animation.h"
#include "asset.h"
#include "map.h"
#include "maths.h"
#include "obj.h"
#include "physics.h"
#include "plat.h"
#include "render.h"

void init_player(Player* p) {
	p->anim = asset_id_guy_run_right_anm;
	p->x = 0;
	p->y = 0;
	p->vx = 0;
	p->vy = 0;
	p->frame = 0;
	p->grounded = 0;
	p->headbutted = 0;
	p->on_ramp = 0;
	p->jumping = 0;
	p->face = face_right;
}

void update_player_anim(Player* p) {
	const Animation* anim = get_animation(p->anim);
	update_anim(anim, &p->frame, &p->rect);
}

void update_player_phys(Player* p, const Map* map) {
	const Rect r = {
		5  << fbits,
		4  << fbits,
		5  << fbits,
		12 << fbits
	};
	update_body(
		map,
		&p->x,
		&p->y,
		&p->vx,
		&p->vy,
		&p->grounded,
		&p->headbutted,
		&p->on_ramp,
		&r
	);
}

void update_player_move(Player* p, const App* a) {
	int grounded = p->grounded < 3;
	int mf = player_move_force;
	int nanim, moving, t;
	int jumping = p->jumping;
	Face* face = &p->face;
	if (!grounded) {
		mf = player_air_move_force;
	}
	if (btn_pressed(a, btn_left)) {
		p->vx -= mf;
		*face = face_left;
	}
	if (btn_pressed(a, btn_right)) {
		p->vx += mf;
		*face = face_right;
	}
	p->vx =
		p->vx < -player_max_vel ? -player_max_vel:
		p->vx >  player_max_vel ?  player_max_vel:
		p->vx;
	moving = absolute(p->vx);
	moving = moving > player_stop_thresh;
	if (p->grounded == 0 || p->headbutted) {
		p->jumping = 0;
	}
	jumping = p->jumping;
	if (jumping) {
		if (p->grounded < 10 && btn_pressed(a, btn_jump)) {
			t = absolute(p->vy + 1);
			t = (f1 << fbits) / t;
			p->vy -= (player_jump_power_air * t) >> fbits;
		}
		if (p->vy < 0 && btn_just_released(a, btn_jump)) {
			p->vy += f1;
			p->jumping = 0;
		}
	}
	if (grounded && btn_just_pressed(a, btn_jump)) {
		p->vy = -player_jump_power;
		p->jumping = 1;
		play_sound(500);
	}
	jumping = p->jumping;
	nanim = p->anim;
	switch (p->face) {
		case face_left:
			nanim =
				grounded ?
					moving ?
						asset_id_guy_run_left_anm:
						asset_id_guy_idle_left_anm:
					p->vy < 0 ?
						asset_id_guy_jump_left_anm:
						asset_id_guy_fall_left_anm;
			break;
		case face_right:
			nanim =
				grounded ?
					moving ?
						asset_id_guy_run_right_anm:
						asset_id_guy_idle_right_anm:
					p->vy < 0 ?
						asset_id_guy_jump_right_anm:
						asset_id_guy_fall_right_anm;
			break;
		default: break;
	}
	if (nanim != p->anim) {
		p->frame = 0;
		p->anim = nanim;
	}
}

void update_player(Player* p, App* app, const Map* map) {
	update_player_move(p, app);
	update_player_phys(p, map);
	update_player_anim(p);
}

void ren_player(Player* p, struct Renderer* r) {
	const Bitmap* b = get_bitmap(asset_id_guy_img);
	ren_map(r, p->x >> fbits, p->y >> fbits, &p->rect, b);
}