#!/usr/bin/env python3
"""Gold Latin mottoes scrolling continuously around the portal ring."""

from __future__ import annotations

import math

from leds.bpm_limits import band, resolve_pulse, resolve_scroll
from leds.colors import dim
from leds.pattern import Color, Param, Pattern, run_cli, set_pixel, size
from leds.portal_span import global_x, ring_metrics
from leds.text import CHAR_HEIGHT, draw_text, text_width

MOTTOES = (
    "AVE",
    "SPQR",
    "VENI VIDI VICI",
    "CARPE DIEM",
    "TEMPUS FUGIT",
    "MEMENTO MORI",
    "ALEA IACTA EST",
)
SEPARATOR = "  *  "
DEFAULT_TEXT = SEPARATOR.join(MOTTOES)


class Inscription(Pattern):
    id = "inscription"
    label = "Inscription"
    fps = 28
    colors = {
        "ink": Color("#e0b44a"),
        "stone": Color("#2a1c10"),
    }
    params = {
        "text": Param(
            DEFAULT_TEXT,
            kind="text",
            max_length=160,
            label="Text",
            placeholder="AVE  *  SPQR",
        ),
        "text_brightness": Param(1.0, min=0.0, max=1.0, step=0.05, label="Text brightness"),
        "bg_brightness": Param(0.55, min=0.0, max=1.0, step=0.05, label="Background"),
    }

    def draw(self, surface, t, params):
        w, h = size(surface)
        extras = params["extras"]
        pulse = resolve_pulse(params, t, fallback_bpm=96, attack=0.18)
        bass = band(params, "bass")
        energy = band(params, "energy")
        ink = dim(
            params["colors"]["ink"],
            float(extras["text_brightness"]) * (0.85 + 0.15 * max(pulse, bass)),
        )
        stone = params["colors"]["stone"]
        bg_b = float(extras["bg_brightness"])
        banner = str(extras.get("text") or DEFAULT_TEXT).strip() or DEFAULT_TEXT
        x_offset, ring, _ = ring_metrics(params, w)

        for y in range(h):
            for x in range(w):
                gx = global_x(x, params, w)
                grain = 0.55 + 0.45 * math.sin(gx * 0.37 + y * 1.1)
                level = grain * (0.92 + 0.08 * energy)
                set_pixel(surface, x, y, dim(stone, level * bg_b))

        span = text_width(banner)
        if span <= 0:
            return
        loop = max(span + max(ring // 8, 8), ring)
        scroll = resolve_scroll(
            params,
            t,
            fallback_bpm=96,
            pixels_per_beat=max(2.0, ring / 8.0),
            loop=loop,
        )
        origin = -scroll - x_offset
        y0 = max(0, (h - CHAR_HEIGHT) // 2)
        draw_text(surface, banner, origin, y0, ink)
        draw_text(surface, banner, origin + loop, y0, ink)


if __name__ == "__main__":
    run_cli(Inscription)