extends KinematicBody2D

# Movement
const UP = Vector2(0, -1)

var motion = Vector2()
export var max_run_speed    = 300
export var max_fall_speed   = 600
export var run_acceleration = 10
export var gravity          = 10
export var jump_force       = -300
export var friction         = 10

onready var anim = get_node("AnimatedSprite")

# What we should do when a certain animation finishes
func _on_AnimatedSprite_animation_finished():
    anim.set_speed_scale(2)
    if not ["idle", "jump", "fall"].has(anim.animation):
        motion.x = 0

    if is_on_floor():
        anim.play("idle")
    elif anim.animation == "jump":
        if motion.y < 0:
            anim.play("jump")
            anim.frame = 2
        else:
            anim.play("fall")
    elif ["fall"].has(anim.animation):
        anim.play("fall")
        anim.frame = 2
    else:
        anim.play("fall")

func get_inputs():
    # Perform movement calculations based on which button is pressed
    if Input.is_action_pressed('ui_right') && motion.x < max_run_speed:
        anim.flip_h = false

        if motion.x > max_run_speed / 8&& anim.animation == "idle":
            anim.play("move")

        motion.x += run_acceleration
    elif Input.is_action_pressed('ui_left') && motion.x > -max_run_speed:
        anim.flip_h = true

        if motion.x < max_run_speed / -8 && anim.animation == "idle":
            anim.play("move")

        motion.x -= run_acceleration
    # If no movement keys were pressed, apply friction
    else:
        if motion.x > friction:
            motion.x -= friction
        elif motion.x < 0 && motion.x < -friction:
            motion.x += friction
        else:
            motion.x = 0


func _physics_process(delta):


    # Stop movement for two frames on every movement cycle.
    if anim.animation == "move" && anim.frame > 10 or anim.animation == "landing" && anim.frame < 2:
        motion.x = 0
        if Input.is_action_pressed('ui_right') || Input.is_action_pressed('ui_left'):
            anim.play("move")
            anim.frame = 1

    if motion.y < max_fall_speed - gravity:
        motion.y += gravity
    else:
        motion.y == max_fall_speed

    get_inputs()
    floor_check()
    move_and_slide(motion, UP)

# Chech whether the character is on the floor or in air and play animations accordingly
func floor_check():
    if is_on_floor():
        if not anim.is_playing():
            anim.play("idle")
        # If we are in the middle of an animation when on the floor, play the appropriate animation
        if anim.is_playing():
            if ["fall"].has(anim.animation):
                anim.play("landing")
        if Input.is_action_just_pressed("ui_up"):
            motion.y = jump_force
            anim.play("jump")
        else:
            motion.y = 0