#!/bin/sh -e
#
# Build the Alice Linux static website into public/.
# Run from the project root.
#
# Dependencies: cmark, curl

cd "$(dirname "$0")/.."

for dep in cmark curl; do
	command -v "$dep" >/dev/null 2>&1 || {
		printf 'Error: "%s" is required but not found in PATH.\n' "$dep" >&2
		exit 1
	}
done

rm -rf public
mkdir -p public

html_escape() {
	# takes a single string argument, prints escaped to stdout
	printf '%s' "$1" | sed 's/\&/\&amp;/g;s/</\&lt;/g;s/>/\&gt;/g;s/"/\&quot;/g'
}

port_version() {
	grep '^version=' "$1/abuild" | cut -d = -f2- || true
}

port_release() {
	grep '^release=' "$1/abuild" | cut -d = -f2- || true
}

port_depends() {
	[ -f "$1/depends" ] || return 0
	grep -Ev '^(#|$)' "$1/depends" | tr '\n' ' ' | sed 's/[[:space:]]*$//' || true
}

generate_ports_page() {
	{
		sed "s/@TITLE@/ports/g" files/header
		echo "<p>Package ports generated from <code>repos/core</code>, <code>repos/extra</code>, and <code>repos/community</code>.</p>"
		echo "<div class=\"ports-toolbar\">"
		echo "<button type=\"button\" class=\"active\" data-repo=\"all\">all</button>"
		echo "<button type=\"button\" data-repo=\"core\">core</button>"
		echo "<button type=\"button\" data-repo=\"extra\">extra</button>"
		echo "<button type=\"button\" data-repo=\"community\">community</button>"
		echo "<input id=\"ports-search\" type=\"search\" placeholder=\"filter ports\" autocomplete=\"off\">"
		echo "</div>"
		echo "<div class=\"ports-count\"><span id=\"ports-visible\">0</span> / <span id=\"ports-total\">0</span> ports</div>"
		echo "<table id=\"ports-table\">"
		echo "<thead><tr><th>repo</th><th>name</th><th>version</th><th>dependencies</th></tr></thead>"
		echo "<tbody>"

		for repo in core extra community; do
			for port in repos/$repo/*; do
				[ -f "$port/abuild" ] || continue
				name=${port##*/}
				version=$(port_version "$port")
				release=$(port_release "$port")
				depends=$(port_depends "$port")
				[ "$release" ] && version=$version-$release

				e_repo=$(html_escape "$repo")
				e_name=$(html_escape "$name")
				e_version=$(html_escape "$version")
				e_depends=$(html_escape "$depends")

				printf '<tr data-repo="%s"><td>%s</td><td><a href="https://codeberg.org/emmett1/alicelinux/src/branch/main/repos/%s/%s">%s</a></td><td>%s</td><td>%s</td></tr>\n' \
					"$e_repo" \
					"$e_repo" \
					"$e_repo" \
					"$e_name" \
					"$e_name" \
					"$e_version" \
					"$e_depends"
			done
		done

		echo "</tbody>"
		echo "</table>"
		cat << 'EOF'
<script>
(function () {
	var table = document.getElementById('ports-table');
	var rows = Array.prototype.slice.call(table.querySelectorAll('tbody tr'));
	var search = document.getElementById('ports-search');
	var visible = document.getElementById('ports-visible');
	var total = document.getElementById('ports-total');
	var buttons = Array.prototype.slice.call(document.querySelectorAll('.ports-toolbar button'));
	var repo = 'all';

	total.textContent = rows.length;

	function filterPorts() {
		var query = search.value.trim().toLowerCase();
		var count = 0;

		rows.forEach(function (row) {
			var repoMatch = repo === 'all' || row.dataset.repo === repo;
			var textMatch = !query || row.textContent.toLowerCase().indexOf(query) !== -1;
			var show = repoMatch && textMatch;
			row.style.display = show ? '' : 'none';
			if (show) count++;
		});

		visible.textContent = count;
	}

	buttons.forEach(function (button) {
		button.addEventListener('click', function () {
			repo = button.dataset.repo;
			buttons.forEach(function (b) { b.classList.remove('active'); });
			button.classList.add('active');
			filterPorts();
		});
	});

	search.addEventListener('input', filterPorts);
	filterPorts();
}());
</script>
EOF
		cat files/footer
	} > public/ports.html
}

# copy static .html files (from repo root, readme, etc.) into public/
find . -type f -name "*.html" ! -path './public/*' | sed 's|^\./||' | while IFS= read -r i; do
	dir=${i%/*}
	file=${i##*/}
	title=${dir##*/}
	[ "$dir" = "$file" ] && {
		title=home; dir=
	}
	mkdir -p "public/$dir"
	printf 'copy html for %s...\n' "$i"
	{
		sed "s/@TITLE@/$title/g" files/header
		cat "$i"
		cat files/footer
	} > "public/$dir/$file"
done

generate_ports_page

generate_commits_page() {
	{
		sed "s/@TITLE@/commits/g" files/header
		cat << 'EOF'
<p>Recent commits from <a href="https://codeberg.org/emmett1/alicelinux">codeberg.org/emmett1/alicelinux</a>.</p>
<ul id="commits"></ul>
<div id="commits-loading">loading…</div>
<div id="commits-error"></div>
<script>
(function () {
	var list = document.getElementById('commits');
	var loading = document.getElementById('commits-loading');
	var errEl = document.getElementById('commits-error');
	var page = 1;
	var loadingMore = false;
	var hasMore = true;
	var PER_PAGE = 30;

	function fmtHash(hash) {
		return hash.substring(0, 7);
	}

	function fmtDate(iso) {
		var d = new Date(iso);
		var y = d.getFullYear();
		var m = String(d.getMonth() + 1).padStart(2, '0');
		var day = String(d.getDate()).padStart(2, '0');
		var h = String(d.getHours()).padStart(2, '0');
		var min = String(d.getMinutes()).padStart(2, '0');
		return y + '-' + m + '-' + day + ' ' + h + ':' + min;
	}

	function esc(s) {
		var d = document.createElement('div');
		d.textContent = s;
		return d.innerHTML;
	}

	function loadCommits() {
		if (!hasMore || loadingMore) return;
		loadingMore = true;
		loading.style.display = 'block';

		var url = 'https://codeberg.org/api/v1/repos/emmett1/alicelinux/commits?limit=' + PER_PAGE + '&page=' + page;

		fetch(url)
			.then(function (r) {
				if (!r.ok) throw new Error('HTTP ' + r.status);
				var link = r.headers.get('X-HasMore');
				if (link === 'false' || link === null) hasMore = false;
				return r.json();
			})
			.then(function (data) {
				if (!data.length || data.length < PER_PAGE) hasMore = false;

				data.forEach(function (c) {
					var li = document.createElement('li');
					var hash = c.sha || '';
					var msg = c.commit.message.split('\n')[0] || '';
					var author = c.commit.author.name || 'unknown';
					var date = c.commit.author.date || '';
					var url = c.html_url || '#';

					li.innerHTML =
						'<span class="commit-hash"><a href="' + esc(url) + '">' + esc(fmtHash(hash)) + '</a></span>' +
						'<span class="commit-msg"><a href="' + esc(url) + '">' + esc(msg) + '</a></span>' +
						'<span class="commit-meta">' + esc(author) + '<br>' + esc(fmtDate(date)) + '</span>';
					list.appendChild(li);
				});

				page++;
				loadingMore = false;
				loading.style.display = 'none';
			})
			.catch(function (err) {
				loadingMore = false;
				loading.style.display = 'none';
				hasMore = false;
				errEl.textContent = 'Failed to load commits: ' + err.message;
				errEl.style.display = 'block';
			});
	}

	window.addEventListener('scroll', function () {
		if (loadingMore || !hasMore) return;
		var scrollBottom = window.scrollY + window.innerHeight;
		var threshold = document.body.scrollHeight - 600;
		if (scrollBottom >= threshold) loadCommits();
	});

	loadCommits();
}());
</script>
EOF
		cat files/footer
	} > public/commits.html
}

generate_commits_page

generate_download_page() {
	{
		sed "s/@TITLE@/download/g" files/header

		listing=$(curl -sL --max-time 10 https://dl.alicelinux.org/ 2>/dev/null || true)

		cat << 'EOF'
<h1>Download</h1>
<p>Alice Linux installation images and rootfs tarballs. See the <a href="/docs/install.html">installation guide</a> for setup instructions.</p>
<div id="dl-status" class="dl-empty">loading…</div>
<table class="dl-table" id="dl-table"><tbody>
EOF

		if [ -n "$listing" ]; then
			echo "$listing" | sed -n '/<tbody>/,/<\/tbody>/p' | while IFS= read -r row; do
				case $row in
					*'<tr>'*)
						href=$(printf '%s' "$row" | sed 's/.*<a href="\([^"]*\)">.*/\1/')
						name=$(printf '%s' "$row" | sed 's/.*<a href="[^"]*">\([^<]*\)<.*/\1/')
						size=$(printf '%s' "$row" | sed 's/.*<td class="s"[^>]*>\([^<]*\)<.*/\1/')
						date=$(printf '%s' "$row" | sed 's/.*<td class="m">\([^<]*\)<.*/\1/')
						type=$(printf '%s' "$row" | sed 's/.*<td class="t">\([^<]*\)<.*/\1/')
						[ "$name" = "../" ] && continue
						url="https://dl.alicelinux.org/$href"
						e_url=$(html_escape "$url")
						e_name=$(html_escape "$name")
						e_size=$(html_escape "$size")
						e_date=$(html_escape "$date")
						if [ "$type" = "Directory" ]; then
							printf '<tr><td><a href="%s">%s/</a></td><td>%s</td><td>%s</td></tr>\n' \
								"$e_url" "$e_name" "$e_size" "$e_date"
						else
							printf '<tr><td><a href="%s">%s</a></td><td>%s</td><td>%s</td></tr>\n' \
								"$e_url" "$e_name" "$e_size" "$e_date"
						fi
						;;
				esac
			done
		fi

		cat << 'EOF'
</tbody></table>
<script>
(function () {
	var table = document.getElementById('dl-table');
	var tbody = table.querySelector('tbody');
	var status = document.getElementById('dl-status');

	function esc(s) {
		var d = document.createElement('div');
		d.textContent = s;
		return d.innerHTML;
	}

	function rowHTML(href, name, size, date, isDir) {
		var url = 'https://dl.alicelinux.org/' + href;
		var label = esc(name) + (isDir ? '/' : '');
		return '<tr><td><a href="' + esc(url) + '">' + label + '</a></td><td>' + esc(size) + '</td><td>' + esc(date) + '</td></tr>';
	}

	fetch('https://dl.alicelinux.org/')
		.then(function (r) {
			if (!r.ok) throw new Error('HTTP ' + r.status);
			return r.text();
		})
		.then(function (html) {
			var parser = new DOMParser();
			var doc = parser.parseFromString(html, 'text/html');
			var rows = doc.querySelectorAll('table tbody tr');
			var frag = document.createDocumentFragment();

			rows.forEach(function (row) {
				var cells = row.querySelectorAll('td');
				if (!cells.length) return;
				var link = cells[0].querySelector('a');
				if (!link) return;
				var href = link.getAttribute('href');
				var name = link.textContent;
				if (name === '../') return;
				var size = cells[2] ? cells[2].textContent.trim() : '';
				var date = cells[1] ? cells[1].textContent.trim() : '';
				var isDir = cells[3] && cells[3].textContent.trim() === 'Directory';
				var tr = document.createElement('tr');
				tr.innerHTML = rowHTML(href, name, size, date, isDir);
				frag.appendChild(tr);
			});

			if (frag.childNodes.length) {
				tbody.innerHTML = '';
				tbody.appendChild(frag);
			}
			status.textContent = '';
			status.style.display = 'none';
		})
		.catch(function () {
			var rows = tbody.querySelectorAll('tr');
			if (rows.length) {
				status.textContent = '';
				status.style.display = 'none';
			} else {
				status.innerHTML = 'Unable to load. Visit <a href="https://dl.alicelinux.org">dl.alicelinux.org</a> directly.';
			}
		});
}());
</script>
EOF
		cat files/footer
	} > public/download.html
}

generate_download_page

# build docs index
cat docs/readme.md > docs/index.md
for f in docs/*.md; do
	case $f in */readme.md|*/index.md) continue;; esac
	title=$(head -n1 "$f" | sed "s/^#* *//")
	file=${f##*/}
	file_no_num=$(printf '%s' "$file" | sed 's/^[0-9][0-9]-//')
	echo "- [$title](./${file_no_num%.md}.html)" >> docs/index.md
done
cat >> docs/index.md << 'EOF'

Documentation improvements are welcome. Visit the [docs directory](https://codeberg.org/emmett1/alicelinux/src/branch/main/docs) to contribute.
EOF

# convert markdown to html
doc_files=$(ls docs/*.md 2>/dev/null | sort | grep -v /readme.md | grep -v /index.md || true)
find . -type f -name "*.md" ! -path './public/*' | sed 's|^\./||' | while IFS= read -r i; do
	dir=${i%/*}
	file=${i##*/}
	outfile=$(printf '%s' "$file" | sed 's/^[0-9][0-9]-//')
	title=${dir##*/}
	[ "$dir" = "$file" ] && {
		title=home; dir=
	}
	mkdir -p "public/$dir"
	printf 'generating html for %s...\n' "$i"
	{
		sed "s/@TITLE@/$title/g" files/header
		case $i in docs/readme.md|docs/index.md) ;; *) case $i in docs/*) printf '<a href="/docs/">&lt;- back to docs</a>\n\n';; esac; esac
		cmark "$i"
		case $i in docs/readme.md|docs/index.md) ;; *)
			case $i in docs/*)
				next=$(printf '%s\n' "$doc_files" | grep -FA1 "$i" | tail -n1)
				if [ "$next" ] && [ "$next" != "$i" ]; then
					next_title=$(head -n1 "$next" | sed 's/^#* *//')
					next_html=$(printf '%s' "${next##*/}" | sed 's/^[0-9][0-9]-//')
					printf '\n<div style="display:flex;justify-content:space-between;margin-top:1.5em"><a href="/docs/">&lt;- back to docs</a><a href="/docs/%s">%s -&gt;</a></div>\n' "${next_html%.md}.html" "$next_title"
				else
					printf '\n<a href="/docs/">&lt;- back to docs</a>\n'
				fi
			;;
			esac
		;;
		esac
		cat files/footer
	} > "public/$dir/${outfile%.md}.html"
done

# move readme.html to index.html
find public -type f -name "readme.html" | while IFS= read -r i; do
	mv -n "$i" "${i%/*}/index.html"
done

rm -f docs/index.md

if [ -d files ]; then
	cp -ra files public/
fi

echo alicelinux.org > public/.domains
echo alicelinux.emmett1.my >> public/.domains

exit 0