#!/usr/bin/env bash
# Build the standalone web page from the Artifact source.
#
# _artifact/*.html is written "bare" (no doctype/html/head/body) because the
# Artifact publisher supplies that skeleton itself. A file served by Apache
# needs the real skeleton: this server sends no Content-Type header, so the
# browser falls back to MIME sniffing, which only recognises HTML when the
# file starts with <!DOCTYPE html>. A leading <meta> tag is sniffed as plain
# text, which is why the bare file rendered as source. Run this after every
# edit to _artifact/.
#
# The source's head material (meta/title/link/style) runs up to and including
# the single </style>; everything after it is body content.
set -euo pipefail
cd "$(dirname "$0")"

for src in _artifact/*.html; do
  out="$(basename "$src")"
  n=$(grep -c '</style>' "$src" || true)
  if [ "$n" -ne 1 ]; then
    echo "skip $src: expected exactly one </style>, found $n" >&2
    continue
  fi
  {
    printf '<!DOCTYPE html>\n<html lang="vi">\n<head>\n'
    printf '<meta name="viewport" content="width=device-width, initial-scale=1">\n'
    awk 'NR==1,/<\/style>/' "$src"
    cat <<'RESET'
<style>
  :root{color-scheme:light dark}
  body{margin:0}
  img{max-width:100%}
  [hidden]{display:none!important}
</style>
RESET
    printf '</head>\n<body>\n'
    awk 'f{print} /<\/style>/{f=1}' "$src"
    printf '</body>\n</html>\n'
  } > "$out"
  printf 'built %-34s %8d bytes\n' "$out" "$(stat -c%s "$out")"
done