import pyray as pr


class ScrollingText:
    def __init__(
        self,
        text: str,
        font_size: int,
        speed: float = 40.0,  # pixels per second
        pause_time: float = 1.0,  # seconds before scrolling
        color=pr.WHITE,
    ):
        self.font_size = font_size
        self.speed = speed
        self.pause_time = pause_time
        self.color = color
        self.text = None
        self.set_text(text)
        

    def set_text(self, text: str):
        if text == self.text:
            return
        self.text = text
        self.text_width = pr.measure_text(self.text, self.font_size)
        self.reset()

    def reset(self):
        self.offset = 0.0
        self.timer = 0.0
        self.scrolling = False

    def update(self, dt: float, size: pr.Vector2):
        if self.text_width <= size.x:
            return

        self.timer += dt

        if not self.scrolling:
            if self.timer >= self.pause_time:
                self.scrolling = True
                self.timer = 0.0
        else:
            self.offset += self.speed * dt

            if self.offset >= self.text_width + 20:
                self.reset()

    def draw(self, pos: pr.Vector2, size: pr.Vector2):
        clip = pr.Rectangle(pos.x, pos.y, size.x, size.y)
        pr.begin_scissor_mode(
            int(clip.x),
            int(clip.y),
            int(clip.width),
            int(clip.height),
        )

        y = pos.y + (size.y - self.font_size) / 2

        pr.draw_text(
            self.text,
            int(pos.x - self.offset),
            int(y),
            self.font_size,
            self.color,
        )

        # Second copy for seamless loop
        if self.text_width > size.x:
            pr.draw_text(
                self.text,
                int(pos.x - self.offset + self.text_width + 20),
                int(y),
                self.font_size,
                self.color,
            )

        pr.end_scissor_mode()