#!/usr/bin/env python3
"""Construye presentacion.html: deck autocontenido (fuentes, logo, screenshot y
QR embebidos en base64) para que funcione SIN internet en el festival.

Uso:  python3 ventas/build.py
"""
import base64
import io
import os

import segno

HERE = os.path.dirname(os.path.abspath(__file__))
ROOT = os.path.abspath(os.path.join(HERE, ".."))

URL = "https://synctaps.tapometer.com"


def b64(path):
    with open(path, "rb") as f:
        return base64.b64encode(f.read()).decode("ascii")


def qr_b64(url):
    """QR oscuro sobre blanco como PNG base64 (segno trae su propio escritor PNG)."""
    qr = segno.make(url, error="m")
    buff = io.BytesIO()
    qr.save(buff, kind="png", scale=12, border=2, dark="#0e1013", light="#ffffff")
    return base64.b64encode(buff.getvalue()).decode("ascii")


tokens = {
    "@@FONT_REG@@": b64(os.path.join(ROOT, "web/src/assets/fonts/Hando-Regular.otf")),
    "@@FONT_BOLD@@": b64(os.path.join(ROOT, "web/src/assets/fonts/Hando-Bold.otf")),
    "@@LOGO@@": b64(os.path.join(ROOT, "web/src/assets/logo_H_White_1.png")),
    "@@MENU@@": b64(os.path.join(ROOT, "tv-app/store/screenshots/01_menu.png")),
    "@@STEP_TV@@": b64(os.path.join(ROOT, "ventas/dashboard/step_tv.png")),
    "@@STEP_BEERS@@": b64(os.path.join(ROOT, "ventas/dashboard/step_beers.png")),
    "@@STEP_TAPS@@": b64(os.path.join(ROOT, "ventas/dashboard/step_taps.png")),
    "@@DASH@@": b64(os.path.join(ROOT, "ventas/dashboard/dash_overview.png")),
    "@@QR@@": qr_b64(URL),
}

with open(os.path.join(HERE, "presentacion.src.html"), encoding="utf-8") as f:
    html = f.read()

for tok, val in tokens.items():
    if tok not in html:
        raise SystemExit(f"Falta el placeholder {tok} en la plantilla")
    html = html.replace(tok, val)

out = os.path.join(HERE, "presentacion.html")
with open(out, "w", encoding="utf-8") as f:
    f.write(html)

kb = os.path.getsize(out) // 1024
print(f"OK  {os.path.relpath(out, ROOT)}  ({kb} KB, autocontenido)")