#!/usr/bin/env bash
# Assemble the cnxvinyl.lol web root in site/dist.
#
#   site/public/   copied verbatim: landing page, robots.txt, and any static
#                  site dropped in as its own directory (site/public/<name>/)
#   DEMOS below    pages copied out of docs/, so docs/ stays their one source
#
# Run locally with `bash site/build.sh`, then open site/dist/index.html.
# CI (.gitea/workflows/deploy-site.yml) runs the same script and deploys
# site/dist as it is.
set -euo pipefail
cd "$(dirname "$0")/.."

out=site/dist
rm -rf "$out"
mkdir -p "$out"
cp -R site/public/. "$out/"

# "<source in the repo> <path under the web root>"
DEMOS=(
	"docs/plant-operation.html demos/plant-operation/index.html"
	"docs/fleet-calculator.html demos/fleet-calculator/index.html"
	"docs/steam-cooling.html demos/steam-cooling/index.html"
)
for entry in "${DEMOS[@]}"; do
	read -r src dst <<<"$entry"
	mkdir -p "$out/$(dirname "$dst")"
	cp "$src" "$out/$dst"
done

# The deploy job reads this back from the server to confirm what is live.
git rev-parse HEAD >"$out/version.txt" 2>/dev/null || echo unknown >"$out/version.txt"

# Fail on a dead internal link: every href/src in every page that points
# inside the site must resolve to a file in dist.
dead=0
while IFS= read -r page; do
	dir=$(dirname "$page")
	while IFS= read -r ref; do
		# shellcheck disable=SC2016 # literal ${ and {{ mark JS/template strings
		case "$ref" in
		'' | '#'* | http:* | https:* | mailto:* | tel:* | data:* | javascript:* | *'${'* | *'{{'*) continue ;;
		esac
		ref=${ref%%#*}
		ref=${ref%%\?*}
		case "$ref" in
		/*) target="$out$ref" ;;
		*) target="$dir/$ref" ;;
		esac
		[ -d "$target" ] && target="${target%/}/index.html"
		if [ ! -f "$target" ]; then
			echo "dead link in ${page#"$out"/}: $ref" >&2
			dead=1
		fi
	done < <(grep -o -E '(href|src)="[^"]*"' "$page" | sed -E 's/^(href|src)="//; s/"$//')
done < <(find "$out" -name '*.html')
[ "$dead" -eq 0 ] || exit 1

echo "built $out: $(find "$out" -type f | wc -l | tr -d ' ') files"