import time


class InputManager:

    currently_pressed_keys = []

    left_paw_keys = []
    right_paw_keys = []
    shifted_keys = {}

    right_paw_repress_time = 0
    left_paw_repress_time = 0
    right_paw_repressed = False
    left_paw_repressed = False

    repress_time = 0.05

    def init(self, linux):
        if linux:
            import keylist_linux_fi as keys
        else:
            import keylist_win_fi as keys

        self.shifted_keys = keys.shifted_keys

        for key in keys.right_paw_keys:
            self.right_paw_keys.append(key.lower())

        for key in keys.left_paw_keys:
            self.left_paw_keys.append(key.lower())

    def timer_update(self):
        curr_time = time.time()
        update = False
        if self.right_paw_repressed:
            delta = curr_time - self.right_paw_repress_time
            if delta > self.repress_time:
                self.right_paw_repressed = False
                update = True
        if self.left_paw_repressed:
            delta = curr_time - self.left_paw_repress_time
            if delta > self.repress_time:
                self.left_paw_repressed = False
                update = True
        if update:
            self.on_update(True)

    def on_update(self, down):
        pass

    def press_key(self, key):
        key = key.lower()
        if not key in self.currently_pressed_keys:
            if key in self.left_paw_keys and self.left_keys_pressed():
                self.left_paw_repressed = True
                self.left_paw_repress_time = time.time()
            if key in self.right_paw_keys and self.right_keys_pressed():
                self.right_paw_repressed = True
                self.right_paw_repress_time = time.time()

            self.currently_pressed_keys.append(key)
            self.on_update(True)

    def release_key(self, key):
        key = key.lower()
        if key in self.currently_pressed_keys:
            self.currently_pressed_keys.remove(key)
            self.on_update(False)

        shifted = self.shifted_keys.get(key)
        if shifted != None:
            shifted = shifted.lower()
        if shifted in self.currently_pressed_keys:
            self.currently_pressed_keys.remove(shifted)
            self.on_update(False)

    def left_keys_pressed(self):
        pressed = False
        for key in self.currently_pressed_keys:
            if key in self.left_paw_keys:
                pressed = True
        return pressed and not self.left_paw_repressed

    def right_keys_pressed(self):
        pressed = False
        for key in self.currently_pressed_keys:
            if key in self.right_paw_keys:
                pressed = True
        return pressed and not self.right_paw_repressed